Aggregator
COMMENT ON Upgrade 1L08 to a C75 zone.
COMMENT ON Vacuum Activities CEBAF 9/09/2026 through 12/31/26 (SAM26)
26A & 27A girder disconnects completed. Cleanrooms removed from area.
VIP1L09B Neg pump activation completed. Plasma pump cart removed from VIP1L09B. VBV1L09B reconfigured to closed position.
Turbo pump installed at VIP1L10A in preparation for Neg pump activation in the morning,
COMMENT ON Apply Emergency PHP update to web servers
The maintainer of the REMI repo we use did not get advance access to the updates before the 10AM embargo ended and had to build the packages and push them out late this morning (https://github.com/remicollet/remirepo/issues/355) . As of right now his primary repo is overloaded and the update has not showed up in the various mirrors around the globe. We are still trying to get the package updates downloaded in order to be able to install them.
COMMENT ON Install C-100 style Vacuum Controls and Cable Install NL08 (2026 SAM)
Found HV cable for VIP1L231 to have extensive rad damage and kept failing after re-termination.
Tomorrow I will route a spare HV cable to VIP1L231 and hope it is good.
Finished HV re-terminations for VIP1L232 thru VIP1L236 and VCG1L23, all showing good readbacks.
Will finish VIP1L231, VIP1L237 and VIP1L238 tomorrow.
Survey and Alignment work summary
COMMENT ON Install 8 kW circulators in 1L09
Awaiting Authorization/Investigation - after cavity 5 High Vacuum Fault
After preparing the CMTF for PSS MODE --> RUN
We attempted to bring cavity 5 up with minimal power (GDCL 'clamp ~0.05 and GLOS ~1.0) in PULSE MODE. Cavity tripped on vacuum. We allowed vacuum to recover, dropped the clamp from 0.05 to 0.005, tried to get cav 5 on in PULSE MODE, and tripped on vacuum exceeding 5e-7 Torr
We then followed Operating Envelope Violation protocol, Crashed RF and CPS, removed keys, dropped PSS to OPEN, Made escalations per TOD section 3.5.2, etc...
Hall B daily update
Follow-up Re: COMMENT ON Reconfiguration of Photocathode scanning translation stage
COMMENT ON Master Oscillator System - Obsolete 70 MHz Chassis Removal
COMMENT ON BPM Maintenance - SAM '26
IPMAS02 - electronics checkout (https://logbooks.jlab.org/entry/4550618)
IPMAS04 - fuse replaced (https://logbooks.jlab.org/entry/4550747)
IPMAS04 - 15V fuse replaced
Signal injected the RF module, no 45 MHz output. Discovered there was no -15V on the control cable. Inspected the power supply in service building W1, found a blown fuse. Replaced 1 A fuse. Signal injected the RF module, output looks good. Wire sums are balanced and the gains are equal.










