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Re: [Opal] Transverse Shift in Distribution from Monitors

From: Christof Metzger-Kraus <christof.j.kraus AT gmail.com>
To: Chris Hall <chall AT radiasoft.net>
Cc: opal AT lists.psi.ch
Subject: Re: [Opal] Transverse Shift in Distribution from Monitors
Date: Wed, 13 Oct 2021 07:18:23 +0200
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Hi Chris,

I think that this is fixed in Opal 2021.1 but it was reported that a shift is observed also in longitudinal direction. I’ll (try to) fix this as soon as possible. I’ll then have a look at the transverse positions as well.

Christof

Chris Hall <chall AT radiasoft.net> schrieb am Mi. 13. Okt. 2021 um 06:20:

Hi,

In an injector simulation in OPAL-T 2.4, with no bending magnets, I'm seeing a discrepancy I don't understand between the transverse distribution output from a Monitor element and the phase space dump near the same position.

The monitor output is clearly shifted almost exactly 5 mm in x (the same is true in y) compared to the PS dump which is centered nearly around 0.

Is there some shifting that can occur due to measurement against the reference particle in this case, or is there perhaps something else going on?

--
Chris hall
Research Scientist | RadiaSoft
720-502-3928 x709 | chall AT radiasoft.net
radiasoft.net | sirepo.com

[Opal] Transverse Shift in Distribution from Monitors, Chris Hall, 10/13/2021
- Re: [Opal] Transverse Shift in Distribution from Monitors, Christof Metzger-Kraus, 10/13/2021
  - Re: [Opal] Transverse Shift in Distribution from Monitors, Chris Hall, 10/14/2021