Summary

of the CSR Benchmark Results

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Remarks on the CSR Simulation Programs

 

3D Codes:

TraFiC4

insensitive to structures smaller than 2mm (this calculation)

 

TREDI

CSR part is still in test stage (problems with noise)

 

2D Codes:

Program by R. Li

Insensitive to structures smaller than ?mm

 

1D Codes:

elegant

overestimates longitudinal field for low frequency components of charge distribution

 

 

no transverse variation of the longitudinal field

 

 

no transverse field

 

 

longitudinal distribution at the time of field calculation is "frozen in time"

 

 

Fast!

 

Program by P. Emma

same as elegant, but even more so

 

Program by M. Dohlus

same physics as above, but traces the beam back through several magnets for field calculation

 

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Beam Parameters at Test Chicane End

 

 

 

DE

DE RMS [%]

ge [mm]

3D

TraFiC4

-0.058

-0.002

1.40

 

TREDI

-0.041

0.017*

2.3**

 

 

 

 

 

2D

Program by R. Li

-0.056

-0.006

1.32

 

 

 

 

 

1D

elegant

-0.045

-0.0043

1.55

 

Program by P. Emma

-0.043

-0.004

1.52

 

Program by M. Dohlus

-0.045

-0.011

1.62

 

Program by M. Dohlus***

-0.043

-0.01

1.57

 

*

CSR component only?

**

15% charge cut used for emittance calculation

***

CSR term only