Analysing Magnet and Tandem Example

[s I]

Hello,

Does this exist and if not which example is the best to extend to describe this?

Many Thanks!

[Laurie Nevay]

Hello,

There is no specific geometry or example for this. However, you can create it from the generic components in BDSIM. I have attached here a small example that is a bit of a guess of what you want.

Best,
Laurie

rf1: rf, l=3*m, E=20*MeV;
d1: drift, l=50*cm;
g1: gap, l=20*cm;

! this will not be necessary in v1.8 when released
sf = 10.02/10.0;
!analyser: sbend, l=50*cm, angle=pi/2, horizontalWidth=0.2*m, scaling=sf;
! different proportions to deal with large aperture to size ratio
analyser: sbend, l=50*cm, angle=pi/2, horizontalWidth=0.2*m, scaling=sf, vhRatio=1.2, coilWidthFraction=0.3;


l1: line=(d1, rf1, d1, analyser, d1, g1);
use, l1;

beam, particle="ion 12 6",
      momentum=10*GeV;

beam, distrType="gauss", sigmaX=3*mm, sigmaY=3*mm, sigmaXp=1e-5, sigmaYp=1e-5;

option, aper1=5*cm;
! by default, no physics. This is the general physics list from Geant4.
!option, physicsList="g4FTFP_BERT";

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[Laurie Nevay]

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[s I]

Hi Laurie. Yes this is great! Many thanks :D

I will let you know if I need some more help!

I have some problems with the visualisation macro, but I can copy the message when I am back at the work station. It has to do with run initialisation in geant4 prior to initialising the scene. Seems like slightly inconsistent behaviour but I may have not noticed in main the initialisation priority adequately.

[Laurie Nevay]

Think this is resolved with the provided example.