Difference between revisions of "PQB Meeting April 30, 2015"
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* Due to conflict with QWeak Collaboration meeting on Thursday May 28, our next meeting will be on Thursday June 4, 2015. | * 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. | * Roger, Kent and Mark Pitt will present a complete list of changes to Hall Beamline at our next meeting. | ||
| + | |||
* Additions to Roger's list: | * Additions to Roger's list: | ||
# Revive Hall A parity DAQ | # Revive Hall A parity DAQ | ||
| Line 30: | Line 32: | ||
# Injector Aperture currents to parity DAQ: | # Injector Aperture currents to parity DAQ: | ||
## First, a beam test where the currents are sent directly to parity DAQ | ## First, a beam test where the currents are sent directly to parity DAQ | ||
| − | ## If needed, come up with a conceptual design on | + | ## If needed, come up with a conceptual design on how to share the currents between accelerator picoammeters and parity DAQ |
# Synchrotron Radiation discussion: | # Synchrotron Radiation discussion: | ||
| − | ## Yves will implement an ELEGANT model to calculate spin precision with synchrotron radiation | + | ## Yves will implement an ELEGANT model to calculate spin precision with synchrotron radiation included |
| + | ## Depolarization due to spin-flip synchrotron radiation (Sokolov–Ternov effect) is very small | ||
## Does emittance growth depend on helicity? | ## Does emittance growth depend on helicity? | ||
| − | ## Does energy spread depend on helicity? | + | ## 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) [http://dx.doi.org/10.1109/TNS.2013.2291114] [[media:IEEE.61.528.pdf]] | ||
Latest revision as of 11:38, 7 July 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:
- Roger Carlini: Hall A Beamline Modifications: media:PQB_HallATasks.txt
- Yves Roblin: Synchrotron radiation and CEBAF Beam at 11 GeV
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:
- Revive Hall A parity DAQ
- Revive Injector parity DAQ and add additional ADCs for laser QPD and one BPM
- Re-install helicity magnets at injector beamline - Yves will help identify locations to cover phase space
- Injector Aperture currents to parity DAQ:
- First, a beam test where the currents are sent directly to parity DAQ
- If needed, come up with a conceptual design on how to share the currents between accelerator picoammeters and parity DAQ
- Synchrotron Radiation discussion:
- Yves will implement an ELEGANT model to calculate spin precision with synchrotron radiation included
- Depolarization due to spin-flip synchrotron radiation (Sokolov–Ternov effect) is very small
- Does emittance growth depend on helicity?
- 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