[Primexd] [EXTERNAL] run plan note

[Shepherd, Matthew]

Hi Ashot,

> On Aug 24, 2021, at 11:11 AM, gasparan at jlab.org wrote:
> 
> Will it be possible to measure that with the existing light
> monitoring system?
> This, of course, assumes that the LMS does not change significantly
> from the magnetic field.

It might be possible, but as you state there are some assumptions.  Also the inner blocks are  most difficult to illuminate with the LMS and these are the ones you care about most.  Even if you use the LMS I don't think it will remove the need for an independent calibration of the "field on" data.

Of course we've taken data with field off and on and apparently the effect isn't dramatic.  We see the HV setpoints for production GlueX running is largely consistent with choices/gains for PrimEx running with field on.

I just don't know the the effect has been quantified at the level that is needed for your analysis.

Matt

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4075 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/primexd/attachments/20210824/741143af/attachment.p7s>