Difference between revisions of "PQB Meeting December 6, 2018"
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4- Beam emittance and spot-size helicity correlated asymmetry: | 4- Beam emittance and spot-size helicity correlated asymmetry: | ||
* Kent Paschke, "Emittance Growth and Spot Size": [[media:Paschke_SpotSizeEmittance_Dec2018.pdf]] | * Kent Paschke, "Emittance Growth and Spot Size": [[media:Paschke_SpotSizeEmittance_Dec2018.pdf]] | ||
| − | * Jay Benesch, "Emittance | + | * Jay Benesch, "Emittance Measurements since Dec 2017": [[media:beam_properties_FY18.ods]] |
Latest revision as of 11:04, 7 December 2018
We will meet in TEDF 2559 Thursday December 6 at 4:00 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- RTP cell installation in 2019 Winter SAD:
- optics spares (crystals/mounts)
- The optical mounts have been ordered
- PR submitted for the RTP crysals, waiting on buyer
- HV system (2 units w/o pots)
- cable from DAC to HV system
- screen and equations app for DAC
- UVa parts ready (cell + HVPS + dragon boards)
- laser box top hat
- schedule (RTP install, beam checkout, back out)
- RTP monitoring plan during Spring run
2- 2019 CEBAF schedule:
- JAN 2 - JAN 22 (3 week SAD/PSS period) SAD
- Heat/Activate Gun2 Photocathode SLSP
- Install RTP Pockels cell
- Restore/HCO helicity magnets
- JAN 30 - APR 7 (10 week run period)
- Similar to this run with A=30, B=polarized, C=50-70uA, D
- Hall A run short until MAR 7, then a 3 day PQB tests a 1-pass 70uA
- APR 8 - JUN 2 (8 week SAD period)
- Bubble engineering run: 1 wk install + 2 wk run + 1 wk remove
- PQB Studies
- JUN 10 - AUG 11 (9 week run period)
- Hall A PREX polarized 70uA 1 pass @ 499 MHz
- Hall B unpolarized 100nA 5 pass @ 499 MHz
- Hall C unpolarized 50-90 uA 3-5 pass @ 499 MHz for 3 weeks
- AUG 12 - OCT 25 (11 week SAD period)
- Opportunity to replace Gun2 electrode 200KV
- Opportunity to power Wiens from new PS and HVPS
- NOV 1 - DEC 19 (7 week run period)
- Hall A CREX polarized 150uA 1 pass @ 499 MHz
- Hall B polarized 5 pass @ 250 MHz
- Hall C polarized 30uA 5 pass @ 250 MHz
- Hall D 5 pass @ 250 MHz
3- New RTP EDM screen:
- HV controls
- ON/OFF
The DAC VMIC 1068 resides in the VME crate for iocin3. The first 2 channels are used for the High Voltage software. Here are the EPICS PV names for 8 unused DAC channels on the VMIC_1068: IGL0I00C1068_DAC05 IGL0I00C1068_DAC06 IGL0I00C1068_DAC07 IGL0I00C1068_DAC08 IGL0I00C1068_DAC09 IGL0I00C1068_DAC10 IGL0I00C1068_DAC11 IGL0I00C1068_DAC12 The card is strapped for 0-10 Volts and the software for these 8 DAC channels are set so a value of 0 = 0 Volts, 5 = 5 Volts, 10 = 10 Volts, etc ... .
4- Beam emittance and spot-size helicity correlated asymmetry:
- Kent Paschke, "Emittance Growth and Spot Size": media:Paschke_SpotSizeEmittance_Dec2018.pdf
- Jay Benesch, "Emittance Measurements since Dec 2017": media:beam_properties_FY18.ods