Recent Log Entries

Log Number: 3858951Logbook(s): 

• ELOG
• SRFLOG

Body: 

rather large-conductance leak found on CM03 during WG
removal. Pressure dropped because of atmospheric change ~
9Torr over an hour after the removal, unknown which window
caused the leak - luckily the pressure went down in the CM
rather than the other way round.

Log Number: 3858948Logbook(s): 

• ELOG

Body: 

Please use the cold start up protocol for these powers
supplies.
Task approved by work supervisor

Log Number: 3858946Logbook(s): 

• ELOG

Body: 

In addition to previously listed signals, which will be bypassed, SSG will have to temporarily remove two PSS Laser Shutters from laser's path on the Laser Table. It was deemed impractical due to ongoing Injector segment upgrade work to attempt to power up these Shutters. Therefore these shutters will be moved away but their wiring will remain intact.

Log Number: 3858944Logbook(s): 

• ELOG

Body: 

Revised the Special Hazards/Safety Considerations section of the task.

Log Number: 3858938Logbook(s): 

• POLOG
• ELOG

Body: 

Day #50, Week 11 Day 2, Plans:

Tunnel --
* MechInstall bringing in new Y-chamber and solenoid from
TL
* MechInstall moving gun table to new base pads
* CIS providing vacuum support for tunnel work

InjSB --
* Gun HV interlock work, IN01B{02-05} (Windham)
* Viewer cable terminations, IN03B07 (Norris)
* PSS Upgrades, IN02B{NI,29,30} +briefly elsewhere,
afternoons (Beizer)

Test Lab --
* V-wien HV testing on-going up to +/-20kV at UITF
(Hernandez-Garcia)
* New prebuncher with RF group for testing/tuning
(Wissman)
* A1/A2 cube assembly (Adderley)

MagTest --
* MHD coil (same on A1/A2 aperture

Log Number: 3858934Logbook(s): 

• ELOG

Body: 

24V Supply chassis swapped out at zone NL24

Log Number: 3858930Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  PD SUMMARY Summary

INJ: UITF Matasusada HV power supplies are powered up and HV enabled in preparation for H-Wein HV te

Log Number: 3858910Logbook(s): 

• ELOG
• RFLOG

Body: 

Calibration of the high voltage divider boxes located in zones 1L05 and 1L07 were completed. Calibration of the voltage and analog read backs as well as calibration of the current overload trip points in zones 1L13 and 1L07 were also completed. Finally, the current analog and digital read back for zone 1L07 was completed as well.

Log Number: 3858909Logbook(s): 

• POLOG
• ELOG

Body: 

Day #49, Week 11 Day 1, Wrap-Up:

AIPINJ --
* UITF Matasusada PSs powered up and HV enabled in
preparation for CEBAF H-wien HV evaluation. 3858862
* Y-chamber placed on carts in TL in preparation of move
to tunnel tomorrow

Other Injector SAD Work --
* PSS upgrades continue

Log Number: 3858908Logbook(s): 

• UITFLOG
• ELOG

Entry Makers: poelkerBody: 

The gun and the high power RF sources have been locked out in advance of ceiling tile removal tomorrow necessary for HDIce target swap. UITF is OPEN and safe now

Log Number: 3858907Logbook(s): 

• UITFLOG
• ELOG

Entry Makers: poelkerBody: 

The gate valve at the IBC (VBVMA01) has been disabled. It cannot be opened via epics command. ANd I unplugged the ion pump in the short region downstream of this valve and the IBC, because they plan to vent either side of the IBC tonight in preparation for target swap.

Log Number: 3858905Logbook(s): 

• UITFLOG
• ELOG

Entry Makers: poelkerBody: 

We remain puzzled by the recuring dump current drop outs that happen with or without the dump bias applied. THese sharp current drops are sometimes correlated with temp increase at the He3/He4 mixing chamber. The target halo monitors don't obviously show a correlation with beam position or detector rates.

Figure 1 blue trace shows the dump current at about 840pA, which would correspond to ~ 1nA at the target. Beam current sharply dropping to 30% of desired value and then recovering over ~ 1 minute. There are 7 of these spikes in the figure.

Log Number: 3858903Logbook(s): 

• ELOG

Body: 

Worked in rack NA01B03, today removing old Red striped hookup wires, used in old PLC signal configuration. Begin the process of relocating existing field signal cables, that will be used with new PLC system upgrade. Work progressing.

Log Number: 3858902Logbook(s): 

• UITFLOG
• ELOG

Entry Makers: poelkerBody: 

1 nA on the HDIce target. The striptool shows 840pA, but there's 1nA at the target, some beam does not make it to the dump. Tsuneo will tally data with DAQ using polarized e-beam (now) and unpolarized e-beam (turn OFF pockel cell)

Log Number: 3858898Logbook(s): 

• ELOG

Body: 

1L02 Installed upstream beampipe o-ring/insvac. Closed up access ports and reestablished vacuum. Rough leak check looks okay.

1L03 Preparing for ceramic warm window installations tomorrow.

1L04 & 1L06. Final insulating vacuum leak check completed. Insulating vacuum pumped for 48 hours. New upstream and downstream beampipe / insulating vacuum o-rings installed. Minimal detectable leak 1e-9. Access port o-rings looked really good. No sign of hardening or cracks.

Log Number: 3858897Logbook(s): 

• ELOG

Body: 

Survey and Alignment T.S. and L.E.B. began pitch and roll checks in the 1E and 1S regions

Log Number: 3858890Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 2.2.1 Target restore date was 2020-11-30 14:54:10 The output from the myRestore execution was as follows: iocsoftfac DemandPower@2020-11-30 14:54 1(1) restored system@2020-11-30 14:54 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -s -i iocsoftfac (success) Procedure return status: Success

Log Number: 3858889Logbook(s): 

• UITFLOG
• ELOG

Entry Makers: poelkerBody: 

keV BPM wiresums at two currents, 1 and 0.5 uA for Tsuneo's DAQ test. Figure1 makes sense. Twice as much signal at 1uA compared to 0.5 uA.

But why are the beam positions different? Figure 2. I don't think the beam position actually changes.

Log Number: 3858885Logbook(s): 

• ELOG

Body: 

ran turbo pump #3 up to speed

running turbo pump #2 now

will start #1 in the am

Log Number: 3858884Logbook(s): 

• ELOG

Body: 

Work continuing on upgrade of MMA1H01, deciphering and
completing wiring of phase imbalance interlock.