Aggregator

Log Number: 4465638Logbook(s): 

• POLOG
• ELOG

Entry Makers: suleimanBody: 

See linked entry.

Due to the lack of detailed information, it is very difficult to assess whether there is an actual problem or to make any meaningful plans. Under typical operating conditions - 250 MHz repetition rate with 35 ps FWHM laser pulses - frequency-doubling efficiencies larger than 50% are routinely achieved. The present performance therefore suggests that the laser amplifiers are being overworked.

Not long ago, we continued operating the Hall A laser amplifier until it completely failed; that failure most likely caused the Hall B halo-related downtime in May.

Log Number: 4465634Logbook(s): 

• ELOG

Body: 

This Atlis is associated with two PTW's. PTW 9551 (Exit stair1) and PTW 9555 (Tagger Shield wall)

Log Number: 4465618Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03

Saved: samari 01-09-26 13:48:08 {A:5 B:3 C:1 E:340 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4465612Logbook(s): 

• ELOG

Body: 

Injector beam work is at a good pause point and work can begin at DC Powers convenience.

Log Number: 4465610Logbook(s): 

• ELOG

Entry Makers: samariBody: 

After multiple iterations between slight adjustments to chopping and dechopping amplitudes, the collinearity seems within tolerance! Figs 1 through 4 are rels compared to A, B, C, and D, respectively. Figs 5 through 7 are a viewer walk with all beams!

Log Number: 4465607Logbook(s): 

• ELOG

Body: 

re-approved to ensure status displays OK and not DONE.

Log Number: 4465604Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Going to start iterating from here, but fig 1 you can see all lasers in the isosceles triangle configuration. To converge at 0I05, I had to iterate between increasing the CH2Y amplitude and readjusting its phase to get ACD in the same Y plane. The rels are set for A reference. Fig 4 is A beam, Fig 5 is B, and fig 3 is C. D wasn't making it to 1D, so back to viewers to see whats what.

Log Number: 4465602Logbook(s): 

• ELOG

Body: 

There is an issue with the branch breaker feeding B63. In order to repair this, the 49-MDP must be shut off again. This outage should only take ~20-30 minutes. This will remove power from B49, B39, B63, and B23. The plan is to perform this outage at 10AM on Monday 1/12.

Log Number: 4465590Logbook(s): 

• ELOG

Body: 

Camera 2 (PSS INJ. CAM4) for the injector laser hut replaced, tested, and entered into service.

Log Number: 4465586Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Utilizing adviewer, putting the three peaks (4 lasers A and C on top of each other) with only ch 1X on at equidistant values with ~128 pixels full width. then similarly for CH1Y, and finally adjusting to form the 45 degree line then adding 90 degrees. the resulting set up is shown. The laser phases were adjusted to match zero crossing on the prebuncher by phasing at the 1D00 viewer before these steps were done.

Log Number: 4465584Logbook(s): 

• CLOG
• ELOG

Entry Makers: nortonBody: 

2L02-2L05 Liquid level indications all went to 100 at 0833.

The timing of the level issue coincided with cable connections being made on 2L03 (Level/Temperature/Pressure).

After considerable troubleshooting of the CAMAC system (Power Supply, 3 LL Cards, Crate Controller, Dataway), the level connections for 2L02 and 2L03 were disconnected and the levels for 2L04 and 2L05 were restored to functionality with the 4th level card.

We are investigating the connections on the level card.

Log Number: 4465582Logbook(s): 

• ELOG

Tags: 

• CED

Body: The following control system variables were updated because they were detected to differ from their CED property counter-parts.

• IPMBS00.XSOF: found 0; restored to CED value of .094

Log Number: 4465581Logbook(s): 

• ELOG

Body: 

PTW on-issue. Looks good. Added to SAM Cal and Work Map for Monday 1/12.

Log Number: 4465570Logbook(s): 

• ELOG

Body: 

Installed interlock, stepper, and heater cables, see :

https://logbooks.jlab.org/entry/4465567

Log Number: 4465567Logbook(s): 

• ELOG
• RFLOG

Entry Makers: plawskigeesaman@jlab.orgBody: 

Worked with M. Geesaman and T. Plawski to install heater cables, interlock (ARC, and window temperature sensor), and stepper cables. We also connected the probe cables but this is mostly to keep them from getting in the way.

We tested all low level interlocks (ARC detectors, IR cold window sensors) and we ran the stepper motors and both directions and ensured that there are no limit switch faults. Everything is working as expected and we see no issues at this time.

We will re-test all of these when we perform LLRF commissioning to ensure that any fault will trip RF.

Log Number: 4465564Logbook(s): 

• ELOG

Entry Makers: samariBody: 

After staring to set up injector the beam randomly moved off the viewer. Checked MWF1I06 and there appeared to be an 80 mA blip. DC Power is aware.

Log Number: 4465561Logbook(s): 

• ELOG
• INCLOG

Body: 

Installed Valve interlock cable from C100 chassis in rack SL03B12 to 6GeV vacuum control chassis in rack SL03B10.
Will be tested when warm region girders are reinstalled.

Log Number: 4465560Logbook(s): 

• ELOG

Body: 

Task completed. Panel schedule labeled with new information

Log Number: 4465557Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03
Data from: /usr/opdata/burt/allsnap/01-08-26_17:01:11
Restored file: /tmp/01-09-26_11:13:23.snap


Bringing inj back up

Log Number: 4465556Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03

Saved: samari 01-09-26 11:13:09 {A:5 B:3 C:1 E:340 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.