Jiang,
The problem is that your RFMODE-based simulation uses only a single bunch, which will have large transients and compression from the cavity wakes. To solve this, you can use pseudo-multi-bunch mode, which involves tracking one particle distribution but driving the cavity fields as if you had a series of equispaced bunches. The attached files show how to do this. The result is good agreement of the two methods.
As for the phase walk-off, this is a problem with the feedback implementation. The beam and rf systems walk off together, locked in phase, but drifting relative to the absolute clock. We don't have a ready solution now, but it seems harmless.
--Michael
Confusion to the RFMODE element
Moderators: cyao, michael_borland
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- Posts: 1945
- Joined: 19 May 2008, 09:33
- Location: Argonne National Laboratory
- Contact:
Re: Confusion to the RFMODE element
Forgot the files.
--Michael
--Michael
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- 2018-03-02-mod.zip
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