[BTeam] upcoming beam study prior to machine shutdown

Yves Roblin roblin at jlab.org
Thu Mar 9 16:04:39 EST 2023


We are making a list of beam studies prior to shutdown.  Update your beam study testplans BSlist. If possible, before tomorrow COB or at least before next bteam.

 One beam study that I am already considering is to try low dispersion optics into arc1/arc2. This is for planning postsad optics, its also part of data that Isirumali would like for her phD,  and its similar to what we will use for the positron/cebaf er and ffa projects.  Dennis is working with Isurumali to write the BSlist.

We already did the fast feedback (we are running it productively now in Hall C).

Nathan Rider has a proposal to take data from 1nA to 1000 nA terminating beam into Hall A or C (the only halls with devices to measure current in this range accurately enough .). This has to be coordinated with the halls to see if the bcm cavities can be used to measure that. Nathan is reviving the 1L27 test stand where they have a new bpm design and he wants to do cross-checks with known beam current.

We will finalize tuesday with a tentative schedule (to be coordinated with PD)  of wednesday. I think we need to schedule a full 8 hours block (maybe 6hours of actual studies and 2 hours to recover beam).



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