---------------------------------------------------------------------------------------------- Project: B1 Title: Analysis of four-top-quark production with ATLAS data DESY group: ATLAS Type: Online project Duration: 19th july - 10th sep 2021 Description: The data collected at the Large Hadron collider enables tests of the Standard Model with unprecedented precision and searches for new particles, such as candidates for dark matter or heavy resonances, even in rare and complex final states. The top quark is the heaviest particle known to date and is among the most central objects to collider physics today: top quarks are omnipresent in collider searches both as background and as signal. The top quark Yukawa coupling being close to unity makes top quarks the most interesting objects in many scenarios for physics beyond the Standard model and provides an excellent opportunity for understanding the nature of electroweak symmetry breaking. Recently, the ATLAS experiment has published the first evidence for the production of four top quarks. Searches in the four top quark final state have significant discovery potential for new particles which interact strongly to the top sector, such as resonances predicted in Randall-Sundrum models with warped extra dimensions. The student will analyse four top quark signal models and develop new reconstruction algorithms to improve the signal acceptance. Background processes which can mimic a four-top signal and need to be estimated using widely employed techniques. Hence, the student will gain a broad experience in the methods used in LHC searches and the underlying physics. Special Qualifications expected: Existing knowledge of Linux/UNIX, Shell, python and C++ is highly preferable. Link to further information: https://atlas.cern/updates/briefing/evidence-four-top-quark-production http://me.pgadow.de https://www.desy.de/about_desy/lead_scientists/krisztian_peters/index_eng.html ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B2 Title: Software development for production of the ATLAS inner tracker DESY group: ATLAS Type: Online project Duration: 6 weeks during 19th july - 10th sep 2021 Description: The ATLAS Inner Tracker (ITk) is the new foreseen all-silicon tracking detector for the ATLAS experiment at the High-Luminosity LHC starting in 2026. During the production, a large number of different detector components ranging from sensors over modules to populated detector structures will be built and tested by the worldwide distributed production sites. At DESY, apart from several detector components, one complete end-cap for the ITk strips detector will be assembled. The student will contribute in the development of software necessary for the different production steps, involving remote-control of machines and control instruments or automated measurement routines. Special Qualifications expected: Python programming, Git versioning ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B3 Title: Testbeam analysis of silicon strip detector prototypes for the ATLAS Inner Tracker DESY group: ATLAS Type: Online project Duration: 6 weeks during 19th july - 10th sep 2021 Description: High-energy particle testbeams such as provided by the DESY II testbeam are a vital tool for the development of novel sensor technologies as well as the test of prototype detector components. Measurements of different detector prototypes of silicon strip sensor modules foreseen for the new ATLAS Inner Tracker will be used to determine their performance, e.g. in terms of hit detection efficiency. The student will work on the testbeam reconstruction using the Corryvreckan software framework and contribute to the data analysis pursued in the collaboration. Special Qualifications expected: C++ programming, ideally experience with Root; Git versioning ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B4 Title: Testing new CMOS pixel sensors for particle detection experiments with simulations DESY group: ATLAS Type: Online project Duration: 2 Aug - 10 Sep 2021 Description: Monolithic CMOS sensors have found their way through imaging technologies into High Energy Physics thanks to its multiple advantages in particledetection. Their main characteristic is the integration of the sensor and the readout in a single chip, which provides a reduction in productioneffort, costs and material. As part of the next generation of silicon pixel sensors that are usually employed as tracker and vertex detectors in HighEnergy Physics experiments, a new process for CMOS sensors is being investigated at DESY. Device simulations (TCAD) are needed to develop theunderstanding of this technology and to give an important insight into performance parameters of the sensor, which will be tested in experimentslater on. The summer student will experience first-hand the development of new particle detectors, be trained in TCAD simulations and eventually be able to contribute to this project. Special Qualifications expected: Basic knowledge on silicon detectors and notions on programming. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B5 Title: Analysis of production and decay of the Higgs boson with CMS data DESY group: CMS Type: Online project Duration: 19th july - 10th sep 2021 Description: In the year 2012 the Higgs boson was discovered, whose most prominent decay mode is the decay into a pair of b quarks. Our group is centrally involved in the analysis of this Higgs boson decay, in the topology where the Higgs boson is produced in association with a vector boson. The analysis is performed with the full dataset of the CMS experiment recorded in the Run 2 of the Large Hadron Collider at CERN. Machine learning techniques are important to achieve the highest sensitivity. The student will be involved in the detailed analysis work for this decay channel, which also includes follow-up studies and preparations of the Run 3 analysis. Special Qualifications expected: C++ programming, ideally experience with Root; ideally also Python scripting and some first experience with machine learning ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B6 Title: Analysis of boosted top quarks with CMS data using machine learning techniques DESY group: CMS Type: Online project Duration: 19th july - 10th sep 2021 Description: Tagging leptonically decaying boosted top quarks have not been much explored using jet image based techniques, as of yet. We would like to investigate the the use of Machine Learning techniques (like CNN and BDT) to tag leptonically decaying boosted top quarks in CMS. In addition, we also want to explore the use of such techniques to differentiate between left and right polarized top quarks. This can have very interesting implications for a variety of new physics models which can show up as deviations from the polarization expected from Standard Model processes. Special Qualifications expected: C++ and Python programming, ideally experience with Root; ideally some first experience with machine learning Link to further information: https://arxiv.org/abs/2010.11778 ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B7 Title: Investigation of machine learning techniques to uncover the Higgs CP nature in CMS DESY group: CMS Type: Online project Duration: 19th july - 10th sep 2021 Description: The project consists in estimating the effect brought by the implementation of Machine Learning (ML) to one of the frontier analyses in High Energy Physics (HEP). In particular, following the main line of the recently published "Analysis of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons" performed with the CMS experiment, the student will measure the effect ML techniques have on the sensitivity to the Higgs boson CP structure. ML is heavily used in the analysis to categorise signal events from the background ones, which makes it a perfect playground for the student to get acquainted with this topic. By comparing cut-based approach to a range of ML-based ones (Neural Networks, Boosted Decision Trees, linear models, etc.) in terms of their performance, the student will obtain a general overview of several ML techniques and will be able to carry such knowledge into their future studies. Special Qualifications expected: - Good level of programming in C++, Python and usage of the ROOT framework (required) - Basic knowledge of the Unix environment, at least for what concerns working from terminal (required) - Prior knowledge in ML tools like Scikit-learn, LightGBM/XGBoost, TensorFlow/Keras, PyTorch (beneficial, but not required) Link to further information: https://inspirehep.net/literature/1809624 ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B8 Title: New QCD predictions for ep deep inelastic scattering and comparison with measurements DESY group: CMS Type: Online project Duration: 19th july - 10th sep 2021 Description: Investigation of ep measurments in the QCD field and comparison with theoretical predictions. We will start with measurements from HERA experiments and implement the measurements into computer codes (Rivet) for comparsion with Monte Carlo (MC) event generators. We will learn, how MC generators work and will study different features in detail. Special Qualifications expected: - Learn about the principles of MC event generators and the physics behind. - Learn how to extract information from MC event generators - Basisc knowledge in computing, (Linux, C++) is of advantage, but we will give also an introduction so that everybody can contribute. Link to further information: https://www.desy.de/~jung ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B9 Title: MC4TMD - determiantion of Transverse Momentum Dependent parton densities with Monte Carlo event generators DESY group: CMS Type: Online project Duration: 19th july - 10th sep 2021 Description: We will study Monte Carlo event generators and calculate transverse momentum distributions for the interacting partons after initial and final state parton shower, and provide them in form of transverse momentum dependent (TMD) parton distribtions. We will use Pythia and Herwig (and perhpas Sherpa) MC event generators. Special Qualifications expected: - Learn about the principles of MC event generators and the physics behind. - Learn how to extract information from MC event generators - Basisc knowledge in computing, (Linux, C++) is of advantage, but we will give also an introduction so that everybody can contribute. Link to further information: https://www.desy.de/~jung ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B10 Title: POWHEG and PartonBranching TransverseMomentumDependent parton densities DESY group: CMS Type: Online project Duration: 19th july - 10th sep 2021 Description: We will study the NLO Monte Carlo event generator POWHEG and merge the NLO calcuation with transverse momentum dependent (TMD) parton distriubtions and the TMD parton shower. We will compare these new calcualtions with recent measurements obtained at the LHC. Special Qualifications expected: - Learn about the principles of MC event generators and the physics behind. - Learn how to extract information from MC event generators - Basisc knowledge in computing, (Linux, C++) is of advantage, but we will give also an introduction so that everybody can contribute. Link to further information: https://www.desy.de/~jung ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B11r Title: Combined Z to two lepton and Higgs to four lepton distributions from CMS and ATLAS (Open) Data DESY group: CMS Type: Tandem: Online (Remote) part Duration: 19th july - 10th sep 2021 Description: Higgs to four lepton distributions from CMS Run I Open Data, and Z to two lepton distributions from both CMS and ATLAS Open Data were already studied in previous (summer student) projects. All relevant Higgs data from both Run 1 and Run 2 have already been published by both collaborations. ATLAS has recently released the full 2016 subset of their two- and four-lepton data for educational purposes, sufficiently detailed for the purpose of this project. CMS may soon significantly extend its full research grade Open Data sets, about doubling the available statistics. Producing combined two- and four-lepton distributions from CMS and ATLAS, adapting the already existing tools to all available Open Data statistics, will set benchmarks for potential common analysis of CMS and ATLAS Open Data. Special Qualifications expected: No previous knowledge necessary (learning on the job). Previous knowledge of ROOT, C++, linux as well as basic knowledge of particle and/or detector physics would be an advantage. Link to further information: https://www.desy.de/~geiser/Lehre/thesisprojects.html Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B11s Title: Combined Z to two lepton and Higgs to four lepton distributions from CMS and ATLAS (Open) Data DESY group: CMS Type: Tandem: On-site part Duration: 11th july - 10th sep 2021 Description: Higgs to four lepton distributions from CMS Run I Open Data, and Z to two lepton distributions from both CMS and ATLAS Open Data were already studied in previous (summer student) projects. All relevant Higgs data from both Run 1 and Run 2 have already been published by both collaborations. ATLAS has recently released the full 2016 subset of their two- and four-lepton data for educational purposes, sufficiently detailed for the purpose of this project. CMS may soon significantly extend its full research grade Open Data sets, about doubling the available statistics. Producing combined two- and four-lepton distributions from CMS and ATLAS, adapting the already existing tools to all available Open Data statistics, will set benchmarks for potential common analysis of CMS and ATLAS Open Data. Special Qualifications expected: No previous knowledge necessary (learning on the job). Previous knowledge of ROOT, C++, linux as well as basic knowledge of particle and/or detector physics would be an advantage. Link to further information: https://www.desy.de/~geiser/Lehre/thesisprojects.html Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B12r Title: J/psi and D meson production in ZEUS, CMS, LHCb and ALICE (Open) Data DESY group: CMS Type: Tandem: Online (Remote) part Duration: 19th july - 10th sep 2021 Description: The study of open and hidden charm production in ep and pp collisions is one of the means to understand Quantum Chromodynamics (QCD) at the boundary of the perturbative and nonperturbative regimes. Both the ZEUS common ntuples and the CMS nanoAODplus ntuples contain muons from J/psi decays and charm mesons in similar formats which can straightforwardly be translated into each other. Doing such a translation allows a common analysis and direct comparison of the resulting distributions with the same analysis code. The first (simpler) goal is to prepare the tools to be able to read the ZEUS, CMS nad LHCb (possibly also ALICE) data with the same code, to use these tools to produce corresponding kinematic distributions, and to draw conclusions from their comparison at reconstruction level. The second (more ambitious) goal is to add simulations where available, derive corresponding cross sections, and discuss what one can learn from these concerning QCD. Special Qualifications expected: No previous knowledge necessary (learning on the job). Previous knowledge of ROOT, C++, linux as well as basic knowledge of particle and/or detector physics would be an advantage. Link to further information: https://www.desy.de/~geiser/Lehre/thesisprojects.html Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B12s Title: J/psi and D meson production in ZEUS, CMS, LHCb and ALICE (Open) Data DESY group: CMS Type: Tandem: On-site part Duration: 19th july - 10th sep 2021 Description: The study of open and hidden charm production in ep and pp collisions is one of the means to understand Quantum Chromodynamics (QCD) at the boundary of the perturbative and nonperturbative regimes. Both the ZEUS common ntuples and the CMS nanoAODplus ntuples contain muons from J/psi decays and charm mesons in similar formats which can straightforwardly be translated into each other. Doing such a translation allows a common analysis and direct comparison of the resulting distributions with the same analysis code. The first (simpler) goal is to prepare the tools to be able to read the ZEUS, CMS nad LHCb (possibly also ALICE) data with the same code, to use these tools to produce corresponding kinematic distributions, and to draw conclusions from their comparison at reconstruction level. The second (more ambitious) goal is to add simulations where available, derive corresponding cross sections, and discuss what one can learn from these concerning QCD. Special Qualifications expected: No previous knowledge necessary (learning on the job). Previous knowledge of ROOT, C++, linux as well as basic knowledge of particle and/or detector physics would be an advantage. Link to further information: https://www.desy.de/~geiser/Lehre/thesisprojects.html Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B13r Title: Sensitivity studies of different observables to new physics in electroweak quartic gauge couplings at future lepton collider analyses DESY group: Theory Type: Tandem project: Online (Remote) part Duration: 19th july - 10th sep 2021 (also 8th august - 10th sep 2021 possible) Description: Effective Field Theories (EFT) play a crucial role in systematic approach to scrutinize new physics (NP) beyond the Standard Model (SM). The Standard Model Effective Theory (SMEFT) allows us to model deviations to the quartic gauge couplings within the Standard Model at dimension-eight as genuine anomalous quartic gauge coupling (aQGC). We aim to assess the sensitivity of different observables to new physics in electroweak quartic gauge couplings at future lepton colliders, and explore options to improve cut and selection prescriptions for future lepton collider analyses. During the project, we will utilize MadMiner, which provides a Python-based machine learning framework for inference in particle physics, to infer the full parameter dependence on the event outcome and perform the respective statistical analysis. Especially, we aim to extend MadMiner to use events generated by the Monte Carlo event generator WHIZARD, which is well-suited for lepton collider simulations. Finally, we want to infer the full distribution of the sensitivity to the EFT-parameters over the complete phase space for different observables from Monte Carlo samplings. With those results, we can then analyze the unitarity-violating aspects of the higher-dimensional operators of SMEFT on the different observables. Special Qualifications expected: Python and Shell scripting; basic knowledge about programming (i.e. with Fortran) and machine-learning Link to further information: https://whizard.hepforge.org Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B13s Title: Sensitivity studies of different observables to new physics in electroweak quartic gauge couplings at future lepton collider analyses DESY group: Theory Type: Tandem project: On-site part Duration: 19th july - 10th sep 2021 (also 8th august - 10th sep 2021 possible) Description: Effective Field Theories (EFT) play a crucial role in systematic approach to scrutinize new physics (NP) beyond the Standard Model (SM). The Standard Model Effective Theory (SMEFT) allows us to model deviations to the quartic gauge couplings within the Standard Model at dimension-eight as genuine anomalous quartic gauge coupling (aQGC). We aim to assess the sensitivity of different observables to new physics in electroweak quartic gauge couplings at future lepton colliders, and explore options to improve cut and selection prescriptions for future lepton collider analyses. During the project, we will utilize MadMiner, which provides a Python-based machine learning framework for inference in particle physics, to infer the full parameter dependence on the event outcome and perform the respective statistical analysis. Especially, we aim to extend MadMiner to use events generated by the Monte Carlo event generator WHIZARD, which is well-suited for lepton collider simulations. Finally, we want to infer the full distribution of the sensitivity to the EFT-parameters over the complete phase space for different observables from Monte Carlo samplings. With those results, we can then analyze the unitarity-violating aspects of the higher-dimensional operators of SMEFT on the different observables. Special Qualifications expected: Python and Shell scripting; basic knowledge about programming (i.e. with Fortran) and machine-learning Link to further information: https://whizard.hepforge.org Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B14 Title: Analysing transfer and telemetry data collected at dCache installations at DESY DESY group: IT Type: Online project Duration: 19th July - 27th Aug 2021 Description: This summer-student project would focus on analysing transfer and telemetry data collected at all dCache installations at DESY. The dCache storage system is a distributed storage system designed for high throughput data transfers and to be easy horizontal scaling. Overall about 100PiB of scientific data are stored on the different installations serving all scientific communities on site and many users off-site. We collect about 20 million data transfer operations each day and need to combine these with the telemetry data collected on the storage nodes themselves to get the complete status of the installations. The candidates would have access to these and their task would be to learn and apply data analytics including Machine Learning to the problem. The system in place uses state of the art industry software such as Apache Kafka, Apache Spark as well as the Elastic tool kit. Access to these applications would be done through Jupyter Notebooks. Special Qualifications expected: General Python knowledge, experience with Jupyter Notebooks and visualisation of data in Python are of advantage Link to further information: https://confluence.desy.de/display/SCPublic/Summer+Students+2021 ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B15r Title: Evaluation of the power of "dark photon" searches at the ILC DESY group: FTX/SLB Type: Tandem Team project: Online (Remote) part Duration: 19th july - 10th sep 2021 Description: FIPS (Feebly Interacting ParticleS) are proposed entities that can explain dark matter and the non-observation of such states at accelerators: The reason they have not yet been seen is rather than that they are too massive (the explanation of non-observation of SUSY), they are too feebly interacting to have been observed at LHC or LEP. Future e+e- machines opens up new ways to search for such states: while still having the same low-background conditions and known initial state as at LEP, the future machines will feature 1000 times higher luminosities compared to LEP. The project intends to make a study of the "dark photon" flavour of FIPS at the ILC. In this scenario, the dark photon does decay into SM particles, notably to muon pairs. The signal to search for is thus a very small, but very narrow, peak in the the di-muon spectrum. There is, however, no a priori position of the peak. The project would contain one part which is the estimate of the background rates. This part requires full detector simulation, and would be the task of the on-site student. The other part would be the generation of the signal, and fast detector simulation of it. This can be the task of the remote student. The two students would work together to combine the two and derive the discovery/exclusion potential of ILC for such a scenario. Special Qualifications expected: C++ knowledge is essential. Basic understanding of statistics and probability theory is needed. For the remote student, knowledge of modern Fortran (at least F03) would be useful. Pre-knowledge of root is also useful for both of them. Link to further information: http://flc.desy.de/ (hopefully replaced by ftx.desy.de very soon) Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B15s Title: Evaluation of the power of "dark photon" searches at the ILC DESY group: FTX/SLB Type: Tandem Team project: On-site part Duration: 19th july - 10th sep 2021 Description: FIPS (Feebly Interacting ParticleS) are proposed entities that can explain dark matter and the non-observation of such states at accelerators: The reason they have not yet been seen is rather than that they are too massive (the explanation of non-observation of SUSY), they are too feebly interacting to have been observed at LHC or LEP. Future e+e- machines opens up new ways to search for such states: while still having the same low-background conditions and known initial state as at LEP, the future machines will feature 1000 times higher luminosities compared to LEP. The project intends to make a study of the "dark photon" flavour of FIPS at the ILC. In this scenario, the dark photon does decay into SM particles, notably to muon pairs. The signal to search for is thus a very small, but very narrow, peak in the the di-muon spectrum. There is, however, no a priori position of the peak. The project would contain one part which is the estimate of the background rates. This part requires full detector simulation, and would be the task of the on-site student. The other part would be the generation of the signal, and fast detector simulation of it. This can be the task of the remote student. The two students would work together to combine the two and derive the discovery/exclusion potential of ILC for such a scenario. Special Qualifications expected: C++ knowledge is essential. Basic understanding of statistics and probability theory is needed. For the remote student, knowledge of modern Fortran (at least F03) would be useful. Pre-knowledge of root is also useful for both of them. Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. Link to further information: http://flc.desy.de/ (hopefully replaced by ftx.desy.de very soon) Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B16r Title: Physics validation in the Key4HEP common software framework for future colliders DESY group: FTX Type: Tandem: Online (Remote) part Duration: 6 - 7 weeks, 27th july - 10th sep 2021 Description: The FTX Software (SFT) group is very actively involved in the Key4HEP project, which aims to develop common software for future collider projects. The group is currently involved in the development of a new and common event data model (EDM) at the core of the common software stack. An important aspect of these efforts is the physics validation and testing of this EDM and the whole software stack. The project would entail the development and implementation of test and benchmark cases for the EDM and the Key4HEP software stack. Depending on the interests of the students these efforts would focus on investigating potentially interesting physics channels and/or in developing the necessary validation tools. While the former part can be done remotely, the latter part could greatly benefit from on-site supervision. In the end the two students would collaborate among each other as well as with the Key4HEP community to integrate their resulting work into the project. Special Qualifications expected: Programming knowledge in either C++ or python is essential. Ideally first experiences with ROOT and/or python statistics libraries (scipy, numpy, pandas, ...), but not strictly necessary. Basic statistics and particle physics knowledge. Link to further information: - https://indico.cern.ch/event/934666/contributions/4154229/attachments/2168411/3660367/key4hep_epiphany2021_cracow.pdf Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B16s Title: Physics validation in the Key4HEP common software framework for future colliders DESY group: FTX Type: Tandem: On-site part Duration: 6 - 7 weeks, 27th july - 10th sep 2021 Description: The FTX Software (SFT) group is very actively involved in the Key4HEP project, which aims to develop common software for future collider projects. The group is currently involved in the development of a new and common event data model (EDM) at the core of the common software stack. An important aspect of these efforts is the physics validation and testing of this EDM and the whole software stack. The project would entail the development and implementation of test and benchmark cases for the EDM and the Key4HEP software stack. Depending on the interests of the students these efforts would focus on investigating potentially interesting physics channels and/or in developing the necessary validation tools. While the former part can be done remotely, the latter part could greatly benefit from on-site supervision. In the end the two students would collaborate among each other as well as with the Key4HEP community to integrate their resulting work into the project. Special Qualifications expected: Programming knowledge in either C++ or python is essential. Ideally first experiences with ROOT and/or python statistics libraries (scipy, numpy, pandas, ...), but not strictly necessary. Basic statistics and particle physics knowledge. Link to further information: - https://indico.cern.ch/event/934666/contributions/4154229/attachments/2168411/3660367/key4hep_epiphany2021_cracow.pdf Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B17r Title: CMS HGCAL upgrade: testing new hardware prototypes DESY group: FTX Type: Tandem: On-site part Duration: 6 - 7 weeks, 27th july - 10th sep 2021 Description: The on-site student will help in setting up the tests and testing new hardware prototypes for the SiPM-on-Tile scintillator part of the CMS HGCAL calorimeter upgrade. This will be done in the lab. Both students together will analyse the data. Special Qualifications expected: Interest in detector technologies. Prior experience with electronics would be a bonus. Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B17s Title: CMS HGCAL upgrade: testing new hardware prototypes DESY group: FTX Type: Tandem: On-site part Duration: 6 - 7 weeks, 27th july - 10th sep 2021 Description: The on-site student will help in setting up the tests and testing new hardware prototypes for the SiPM-on-Tile scintillator part of the CMS HGCAL calorimeter upgrade. This will be done in the lab. Both students together will analyse the data. Special Qualifications expected: Interest in detector technologies. Prior experience with electronics would be a bonus. Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B18 Title: FLASHForward - investigating the stability of a plasma wakefield accelerator DESY group: FLASHForward Type: Online project Duration: 19th july - 10th sep 2021 Description: High electric fields in excited plasma wakes make them an attractive medium for electron bunch acceleration with broad applicability to industry, medicine, as well as research facilities such as particle colliders and free-electron lasers. The FLASHForward experiment is an electron-beam-driven plasma-wakefield accelerator, the purpose of which it is to study the beam-plasma interaction as a means to control the acceleration process. A crucial parameter for optimised and efficient acceleration is the stability and reproducibility of the system. In this project the sensitivity of the acceleration process to various experimental parameters will be investigated by setting up realistic beam-tracking and particle-in-cell simulations. The final goal of the project will be to test the efficacy of the simulation packages by comparing their results to experimental data from FLASHForward. Special Qualifications expected: ideally python or C++ scripting ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B19r Title: Programming control modules for manipulation and diagnostic of beams at FLASH DESY group: MPY, MFL Type: Tandem: Online (Remote) part Duration: 6-8 weeks during 19th july - 10th sep 2021 Description: FLASH, the Free electron LASer in Hamburg, is the world's first short-wavelength free-electron laser (FEL) facility, which started user operation in 2005. It remains the only high repetition rate free-electron laser in the XUV/soft X-ray regime worldwide. Within the FLASH2020+ upgrade plans, the primary arm, FLASH1, will be modified to accommodate the first externally seeded beamline with repetition rates of up to 1 MHz in burst mode. For the setup and operation of new lasing and accelerator schemes, a versatile set of reliable tools is of great benefit. The students will work on flexible modules within the available firmware structure at DESY that align the laser and/or electron beam by communicating with various motors, optomechanics and magnets. The complexity of the project will depend on the skills and availability of the students. Special Qualifications expected: Good knowledge of fundamental physics especially E&M, Optics and radiation; Some basic programming skills is essential; Experience with python or desire to learn python during the project; Past experience with instrumentation is a plus; Experience with optomechanics and motorised stages can be very beneficial. Link to further information: https://flash.desy.de/flash_upgrades/ Cancellation policy: In case the on-site part is cancelled due to COVID pandemic restriction this online (remote) part of the project will still take place. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B19s Title: Programming control modules for manipulation and diagnostic of beams at FLASH DESY group: MPY, MFL Type: Tandem: On-site part Duration: 6-8 weeks during 19th july - 10th sep 2021 Description: FLASH, the Free electron LASer in Hamburg, is the world's first short-wavelength free-electron laser (FEL) facility, which started user operation in 2005. It remains the only high repetition rate free-electron laser in the XUV/soft X-ray regime worldwide. Within the FLASH2020+ upgrade plans, the primary arm, FLASH1, will be modified to accommodate the first externally seeded beamline with repetition rates of up to 1 MHz in burst mode. For the setup and operation of new lasing and accelerator schemes, a versatile set of reliable tools is of great benefit. The students will work on flexible modules within the available firmware structure at DESY that align the laser and/or electron beam by communicating with various motors, optomechanics and magnets. The complexity of the project will depend on the skills and availability of the students. Special Qualifications expected: Good knowledge of fundamental physics especially E&M, Optics and radiation; Some basic programming skills is essential; Experience with python or desire to learn python during the project; Past experience with instrumentation is a plus; Experience with optomechanics and motorised stages can be very beneficial. Link to further information: https://flash.desy.de/flash_upgrades/ Cancellation policy: This on-site part of the project may be cancelled any time due to COVID pandemic restrictions. It will not be transformed into an online project. ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Project: B20 Title: Exploring muon vs. pion Identification at Belle II using Machine Learning and CsI(Tl) Pulse Shape Discrimination DESY group: Belle II Type: Online project Duration: 19 Jul - 10 Sep 2021 Description: The Belle II experiment located at the SuperKEKB electron-positron collider in Japan is the first high energy collider experiment to implement CsI(Tl) pulse shape discrimination as a new method for calorimeter-based particle identification. This technique uses the particle-dependent scintillation emission of the CsI(Tl) crystals in the electromagnetic calorimeter to identify particles which interact via the strong nuclear force. Using data collected by Belle II, this project combines machine learning with the new calorimeter information provided by CsI(Tl) pulse shape discrimination to explore the potential for separating ionizing pions and muons. The successful realization of this novel approach to ionizing pion vs. muon identification would have far reaching impact in numerous Belle II analyses. Special Qualifications expected: Prior experience with python scripting and machine learning will be beneficial as well as experience working in a linux computing environment. Link to further information: ... --> https://doi.org/10.1016/j.nima.2020.164562 ----------------------------------------------------------------------------------------------