The OPAL Discussion Forum

["Adelmann Andreas (PSI)" <andreas.adelmann AT psi.ch>]

Hi Nicole your field map in transverse direction is smaller that the beam.

That caused the problem.

Cheers Andreas 

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Dr. sc. math. Andreas (Andy) Adelmann
Staff Scientist
Paul Scherrer Institut WBBA/219 CH-5232 Villigen PSI
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On 23 Jun 2016, at 03:22, Nicole Neveu <nneveu AT hawk.iit.edu> wrote:

​Hi OPAL experts,

I'm want to model a weak TEM kicker in OPAL (2 degrees). The kicker was designed in CST, and a 3D field file was exported. I'm trying to define the element in OPAL as a DC RFcavity (3D EM field map at a very low frequency). I'm using the definition of a DC gun on pg. 101 of the manual as my guideline.

Also, I know there is a lot going on with OPAL-T3D (saw your IPAC paper). Not sure if this is related or not since I'm not using a dipole element?

Here's the error I get:

*** User error detected by function "ParallelTTracker::dumpStats()"

***in line 275 of file "kicker3Dmap.in" at end of statement:

RUN,METHOD="PARALLEL-T",BEAM=BEAM1,FIELDSOLVER=FS_SC,DISTRIBUTION=DIST;

there seems to be something wrong with the position of the bunch!

What does this mean?

For reference, here are the element definitions:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Gun example in manual:

gun: RFCavity, L=0.018, VOLT=-131/(1.052*2.658),

FMAPFN="1T3.T7", ELEMEDGE=0.00,

TYPE="STANDING", FREQ=1.0e-6;

My kicker:

MYKICK: RFCavity, L = 0.6, VOLT = 35.0,  

FMAPFN = "../kicker3D.txt", ELEMEDGE = 15.736,

TYPE = "STANDING", FREQ = 1.0e-6;

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Thanks,

Nicole Neveu

Argonne Wakefield Accelerator