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Re: [Opal] Longitudinal coordinate in Opal-T .h5 data dump

From: "Alba Jacas Arnau (PSI)" <arnau.albajacas AT psi.ch>
To: "opal AT lists.psi.ch" <opal AT lists.psi.ch>, Scott Williams <s.williams7 AT student.unimelb.edu.au>
Subject: Re: [Opal] Longitudinal coordinate in Opal-T .h5 data dump
Date: Thu, 1 Jul 2021 10:39:19 +0000
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Hi Scott,

In OPAL-T the phase-space dump is always done in the frame of reference of the reference particle.

The option PSDUMPFRAME only works for OPAL-cycl. I will update this in the manual, thanks for pointing out the bug.

Best,

Arnau

From: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> on behalf of Scott Williams <s.williams7 AT student.unimelb.edu.au>
Sent: 01 July 2021 11:38:00
To: opal AT lists.psi.ch
Subject: [Opal] Longitudinal coordinate in Opal-T .h5 data dump

Hi all,

I have a quick question regarding the output file <input_file_name >.h5 produced by Opal-T.

What exactly is the longitudinal coordinate "z"? Going by section 6.5 of the documentation (and using the default flag "OPTION, PSDUMPFRAME=GLOBAL;") it should be set with reference to a fixed floor position, but the values from the dump frame appear relative to another moving point.

Thanks,

Scott Williams

[Opal] Longitudinal coordinate in Opal-T .h5 data dump, Scott Williams, 07/01/2021
- Re: [Opal] Longitudinal coordinate in Opal-T .h5 data dump, Alba Jacas Arnau (PSI), 07/01/2021