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[Opal] How to switch on solenoid?

Chronological Thread 
  • From: Hrs_Tsutsui AT
  • To: opal AT
  • Subject: [Opal] How to switch on solenoid?
  • Date: Thu, 27 Feb 2014 17:07:36 +0900
  • List-archive: <>
  • List-id: The OPAL Discussion Forum <>

Dear Dr Adelmann,
Thank you for providing OPAL code. I am a novice user of it.
I would like to simulate low energy H minus beamline with solenoids.

1. I changed quadrupoles in the Quad example in the lecture2 to the
and ran OPAL program.
Attached is the input file.
(See attached file:
Looking at the output, it seems the solenoid is treated as the drift.
Could you tell me how to switch on the solenoid in the simulation?

2. For H- beam, most of the space charge effect may be compensated by the
neutralization. Is it possible to simulate neutralization effect in OPAL?
Or do you have parameter like neutralization factor in the code?

Thank you very much in advance!

Best regards,
Hiroshi Tsutsui
Sumitomo Heavy Industries, Ltd.

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