[BTeam] Bteam today.

[Michael Tiefenback]

I recommend BLA system calibration using 1st pass beam to Hall C, for comparison against delivered current at higher pass and energy.  Would provide a more direct measurement of incremental pass-2 to pass-5 loss beyone pass-1 loss.  We _believe_ at present that pass-1 loss is small.

We ought also to know the duration of the planned run, in order to assess properly the setup trade-offs.

Michael Tiefenback

________________________________
From: BTeam <bteam-bounces at jlab.org> on behalf of Yves Roblin <roblin at jlab.org>
Sent: Tuesday, April 7, 2020 08:52
To: bteam at jlab.org <bteam at jlab.org>
Subject: [BTeam] Bteam today.

We will have a bteam today. I would like to start fleshing out the strategy to restart the machine so that we can get started developing a gant like last time.

 Amongst things to ponder :

1) Restart as is, just  check optics in injector and transverse optics in machine.

2) same as 1) but take time to characterize alternate arc1 optics

3) like 2) but decide to leave the new arc1 optics and rematch accordingly


Things we know we have to do :

 Transtition 4k to 2k
Assess/recover RF
Assess/tune injector
 Check high current setup/loss in east arc ( maybe go to bsy dump at pass 3, loss is enough to be seen at lower current) .
Recheck incoming arc opticdls
Validate beam parity quality

Let's come to the meeting and make a list.










Sent from my Verizon, Samsung Galaxy smartphone

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