[BTeam] more possible checks

[Joe Grames]

The B test is 20 min.
All beams maybe an hour.
I could make a table, Ops can perform, note "good" or "bad" or record halo #'s.

Joe

________________________________
From: BTeam <bteam-bounces at jlab.org> on behalf of Yves Roblin <roblin at jlab.org>
Sent: Friday, August 28, 2020 7:56 AM
To: bteam at jlab.org <bteam at jlab.org>
Subject: [BTeam] more possible checks

Assuming the problem is not localized within Hall B, we can also check the bleedthru from other halls.
suggestion from Joe Grames:

If you close all slits and only run the Hall B beam at 250 MHz is the "cleanest" setup, to the extent B is not bleeding into B' and scraping into the Hall - I guess it should really be close to zero and the base line.   Next, open up only the A slit, to check for B into A, and then open up only the C slit, to check for B through C slit.    If no halo yet, then B laser is excluded from causing themselves grief.   After this, you could repeat with only each of the other beams, to identify the source of the electrons causing halo.

He estimates this is a 20 minute thing and he is willing to assist the crew do this in case they need to.


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