PQB Meeting June 4, 2015

We will meet in TL 2236 Thursday June 4 at 1:00 pm EST.

For those calling in we'll use the Blue Jeans [1] audio conference system.

Phone number: 1-888-240-2560
Meeting ID: 3528502673#
Meeting URL: http://bluejeans.com/3528502673

Agenda:

1. Roger, Kent and Mark: Hall A Beamline Modifications

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Notes from this meeting:

• Need to quantify the effects of synchrotron radiation on beam properties. Is there any helicity correlated degradation?

• For PREx-II:

1. Need to test Hall A BCMs.
2. Beam modulation coils were removed:
   1. Re-install. Yves will help identify location of the air core magnets on beamline
   2. Beam modulation and accelerator Fast Feedback: is there a need to pause FFB when modulation is ON? does FFB implement a digital notch filter to attenuate the modulation frequency while passing all other frequencies? (QWeak: 125 Hz for 20 s every 320 s). From Scott Higgins (July 14, 2015): Hall has paused FFB while beam modulation was on. FFB does not implement a digital notch filter to attenuate the mod freq.

1. Install QQQ cavity triplet in Hall A beamline.
2. Install QWeak Halo Monitors in Hall A beamline (will need new halo target).
3. Preparing a list of instrumentation of Hall A beamline for Thia.