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[Opal] usage of 1DDynamic field map

Chronological Thread  
  • From: Philippe Piot <philippe.piot AT>
  • To: opal <opal AT>
  • Subject: [Opal] usage of 1DDynamic field map
  • Date: Tue, 18 Jan 2022 05:42:02 -0600
  • Authentication-results:; iprev=pass ( smtp.remote-ip=; spf=pass; dkim=pass header.s=20210112 header.a=rsa-sha256; dmarc=pass

Dear All,
   I am using the 1DDynamic representation of an electromagnetic field for a gunf with the following block
1DDynamic 20 True
0 11.5 2999
0.0 2.0 199
... 2998 lines ...
when I track particles arranged on an initial grid I observe a modulation of transverse momentum as function position (see plot on the right below) while the use of a 3D map directly produced in omega3P give the expected dependency (left below). Could somebody comments if anything in my block above if wrong?
The call inside OPAL is as follows:
GUN: RFCavity, L = gun_len,
     VOLT = 40.0,
     ORIGIN = {0,0,0},
     FMAPFN = "Ezvsz.dat",
     FREQ = gun_freq,
     LAG = (gun_inj_phase*Pi)/180.0;

Thank you very much. All the best,  -- Philippe.

px**2+py**2 (colormap) as function of x (horizontal) and y (vertical) axis obtained by tracking in a 3D map of the EM field (left) and with the 1DDynamic field map (right).

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