Question about radius and cut off frequency of LSC in RFCW
Posted: 01 Oct 2018, 12:09
Hi,
I was trying to model tracking in a TESLA crymodule, with both LSCDRIFT and ZWAKE included.
Unfortunately, I could not get rid of the noise in energy distribution for small transverse radius, without cutting off the frequency at very low value and choosing very small number of bins.
For instance, with transverse radius about 10^-5, I have to set LSC_HIGH_FREQUENCY_CUTOFF0=0.1, LSC_BINS=200, sg_order=2, sg_halfwidth="4" to module just LSC in RFCW, to get rif of the noise. However, if I include ZWAKE together, I will see the noise in energy distribution again. Is there something wrong with parameters that I used ?
I attach my scripts for your reference.
Regards
TAN
I was trying to model tracking in a TESLA crymodule, with both LSCDRIFT and ZWAKE included.
Unfortunately, I could not get rid of the noise in energy distribution for small transverse radius, without cutting off the frequency at very low value and choosing very small number of bins.
For instance, with transverse radius about 10^-5, I have to set LSC_HIGH_FREQUENCY_CUTOFF0=0.1, LSC_BINS=200, sg_order=2, sg_halfwidth="4" to module just LSC in RFCW, to get rif of the noise. However, if I include ZWAKE together, I will see the noise in energy distribution again. Is there something wrong with parameters that I used ?
I attach my scripts for your reference.
Regards
TAN