PQB Meeting April 30, 2015

We will meet in TL 2236 Thursday April 30 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 Carlini: Hall A Beamline Modifications: media:PQB_HallATasks.txt
2. Yves Roblin: Synchrotron radiation and CEBAF Beam at 11 GeV

media:Yves_Roblin_SR_pqbmeeting04302015.pdf

media:Yves_Roblin_SR_pqbmeeting04302015.pptx

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Notes from this meeting:

• Due to conflict with QWeak Collaboration meeting on Thursday May 28, our next meeting will be on Thursday June 4, 2015.

• Roger, Kent and Mark Pitt will present a complete list of changes to Hall Beamline at our next meeting.

• Additions to Roger's list:

1. Revive Hall A parity DAQ
2. Revive Injector parity DAQ and add additional ADCs for laser QPD and one BPM
3. Re-install helicity magnets at injector beamline - Yves will help identify locations to cover phase space
4. Injector Aperture currents to parity DAQ:
   1. First, a beam test where the currents are sent directly to parity DAQ
   2. If needed, come up with a conceptual design on how to share the currents between accelerator picoammeters and parity DAQ
5. Synchrotron Radiation discussion:
   1. Yves will implement an ELEGANT model to calculate spin precision with synchrotron radiation is included
   2. Does emittance growth depend on helicity?
   3. Does energy spread (or tail) depend on helicity?

• A Spin-Light Polarimeter for Multi-GeV Longitudinally Polarized Electron Beams.

P. Mohanmurthy and D. Dutta, IEEE TRANSACTIONS ON NUCLEAR SCIENCE 61, 528 (2014) [2] media:IEEE.61.528.pdf