PQB Meeting December 6, 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
• 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

• what else?

2- New RTP EDM screen:

1. HV controls
2. 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 ... .