Homepage Dipl. Phys. Sandra Christen MA Archaeol. Pract.

Alternative/Cologne homepage: http://www.ikp.uni-koeln.de/~sc

Current research A: Investigations on Particle Flow at ILC using simulation and HCAL testbeam data

Current research B: Setup and Test of 2nd Generation Prototype HCAL Main Board Unit (SPIROC2 analysing chip: 36 channels, SiPM pixel detector and plastic scintillator tiles 3 cm x 3 cm) at DESY II testbeam area 21

Talks on 2nd Generation HCAL testbeam: Hcal HBU testbeam plan

DESY Helmholtz research center/
University of Hamburg
FLC CALICE
Notkestr. 85
D - 22607 Hamburg
Germany

Contact:
Office: 66/003 or 02b/514
Tel.: +49[0]40 8998 2384 or 2585

Former nuclear physics research on: Conversion Electron Spectroscopy, Setup and Test of the Cologne 'Orange' Spectrometer

Institute for Nuclear Physics
University of Cologne
Zuelpicher Str. 77
D - 50937 Cologne
Germany

The conversion electron spectrometer 'Orange'

A very brief (:]) introduction to the setup of the Cologne Orange Spectrometer,
used for the analysis of conversion electrons in the energy range from keV up to 1.2 MeV.

Former archaeological and applied geophysical research on: Geophysical and environmental investigations on wetland sites such as 'Crannogs' (artificial islands) in Orkney

Department for Archaeology
Department for Geophysics
Orkney College
University of Highlands and Islands
KW15 1LX Kirkwall, Orkney
Scotland -UK-

Publications/Contributions

Full CV:

Diploma thesis in Experimental Nuclear Physics:

The inner conversion is a process in competition with gamma emmission and therefore a useful alternative to low energetic transitions inside the Compton continuum of a gamma germanium detector, and when gamma decay is less probable then conversion. The Orange Spectrometer was rebuild and setup at the Cologne Institute for Nuclear Physics in 2004/5 after an overall technical obsolescence that took over 3 years with more than a dozen people involved.
The energy resolution that can be achieved after focusing the electrons into a scintillator crystal through a varying magnetic toroidal field is about 0.8 % at 180 keV which equals 1.5 keV. Access the Master's Thesis here: