Aggregator

Log Number: 4467149Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Operators vs. Injector group the way things are done.

Log Number: 4467148Logbook(s): 

• POLOG
• ELOG

Entry Makers: bschaumlBody: 

First, I rocked chopper 1 gangphase back and forth to see whether all three beams are extinguished on the 0I05 viewer at the same time, indicating that the barycenter of the beam spots is centered on the master slit reference hole and the phase of all three beams is properly centered on the apertures of the master slit.

While iterating between adjustments on the 0I05 and 0I06 viewers, turning off the MFX0I06 solenoid eliminates confusing coupling.

I find it useful to leave the beams separated in the horizontal plane while establishing colinearity in the vertical plane as one can more easily

Log Number: 4467147Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-01-22 08:49:33 The output from the myRestore execution was as follows: iocsoftIDXNL01 IDX@2026-01-22 08:49 17(17) restored IDX_det@2026-01-22 08:49 12(12) restored Execute: /cs/op/iocs/iocsoftIDXNL01/initCalibrationConstants.csh NL01 (success) Old : IIX1L02_gCc 3.236e+11 New : IIX1L02_gCc 3.236e+11 Old : IIX6R10_gCc 2.095e+11 New : IIX6R10_gCc 2.095e+11 Old : IIX8R10A_gCc 2.067e+11 New : IIX8R10A_

Log Number: 4467146Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

Figure s 1 and 2 show the V-Wien temperature PVs in Celsius along with the V-Wien voltage and magnet PVs.

The chiller temperature set point was changed from 22 to 18 C on 01-21-2026 at 13:00.

There seems to be very little change in temeprature vs. magnet current with the new chiller temperature set point.

Log Number: 4467145Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

When the V-Wien spin rotation angle is changed from +90 to -90 deg, this executes the following commands:
1. Set the output voltages to zero in each HVPS
2. Set the magnet current from +16 to - 16 A, executing the hysteresis loop
3. HV switcher chassi polarity flip
4. Ramp each PS from 0 to 18 kV

Step 1 is executed without slow ramp. This seems to trigger pressure spikes in the injector beamline. See figure 1, and figure 2 for a zoom in time.

I suggest to implement a slow ramp down / ramp up (similar to that fot the gun HVPS) to each of the Wien HVPS.

Log Number: 4467143Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  Click to add image [figure:1] PD SUMMARY

Log Number: 4467142Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

Claire has updated the Wien thermcouple Labjack PVs with the room temperature readout correction factor. Now each of the 2 Thermocuples PVs in each Wien filter are reporting expected temperature values.

Next step is to add these PVs to their corresponding Wien controls screen. I will coordinate this with Claire.

Log Number: 4467141Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             01/22/2026
SHIFT:               Day

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4467139Logbook(s): 

• ELOG

Body: 

Looks good. Added to SAM Cal.

Log Number: 4467138Logbook(s): 

• ELOG

Body: 

21st January work:
- Hall B radiator alignment.
- finished SRF L2RB cryomodule fiducialization and inspection.

22nd January work map:
- Hall D target fiducialization.
- Hall B radiator alignment.

Log Number: 4467137Logbook(s): 

• POLOG
• ELOG

Entry Makers: bschaumlBody: 

The procedure works well to get everything lined up on the 0I05 viewer. I was topping out on the available 2Y gradient, so the 0I05 beam spots aren't directly on top of one another, but I'll fix that in the next stage where I'm getting collinearity roughed in on viewers. Seems like I'm chopping too hard with 1Y.

It may be useful to rearrange some steps to get the beams visible (not on top of one another) on 0I05 and only THEN insert the master slit to check that you aren't losing beam on it.

Log Number: 4467136Logbook(s): 

• POLOG
• ELOG

Body: 

- Injector Aperture A2 was completely retracted out of beam path.
- Test beam envelope management around Wiens after A2 retraction and photocathode activation.
- Lowered Wiens chiller temperature setpoint from 22C to 18C.

Log Number: 4467135Logbook(s): 

• ELOG

Body: 

21st January:
-Tunnel pan install east end of the SL
-Finishing up Hall C JBox
-B60 (CUP) cooling tower electric meter install
22nd January:
- Tunnel pan installs

Log Number: 4467133Logbook(s): 

• POLOG
• ELOG

Entry Makers: bschaumlBody: 

After establishing laser phases, I proceed to set the rough amplitudes. The X amplitude is set to the 130 px specified in the procedure, but I have found that my prior chopper setups had a Y amplitude that produced (that I recall) about 135 px, so I am running with that. Rather than adding—as the procedure states—90 degrees to the 1Y phase after establishing the diagonal, I subtracted 90 degrees to produce the correctly oriented beams. Adding 90 as the procedure states produces a flipped configuration with B on the bottom and A/C/D on the top.

Log Number: 4467132Logbook(s): 

• POLOG
• ELOG

Entry Makers: bschaumlBody: 

I have found that the chopper setup goes smoother if one phases all the chopped lasers to the same position via the X fit of adviewer and then adds 120 or 240 to the appropriate laser phases. The initial position is established by maximizing the Y fit of the B beam wrt laser phase. I think this may be further refined by adjusting chopper gangphases to maximize transmission through the master slit or hall B slit to FC1 once one has roughly dechopped beam.

Log Number: 4467131Logbook(s): 

• ELOG

Entry Makers: bschaumlBody: 

Loaded allsave 26468 to match the extant Wien settings and zeroed chopper phases.

Centering through MFD0I04 is easier on the 0I05 viewer. Centering through MFD0I04 takes beam pretty far off the center of the master slit reference hole. I decided steer to the center of both and split the difference as my final orbit. I prioritized centering through MFA0I05 over MFX0I05 as the MFX is at a comparably negligible field.

Log Number: 4467130Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl01
Data from: /usr/opdata/burt/allsnap/01-20-26_16:08:35
Restored file: /tmp/01-22-26_01:26:04.snap


Starting chopper practice

Log Number: 4467129Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl01

Saved: bschauml 01-22-26 01:25:51 {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.

Log Number: 4467128Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             01/22/2026
SHIFT:               Owl

The operator has read the following:

Log Number: 4467127Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03

Saved: eforman 01-21-26 23:41:57 {A:5 B:3 C:1 E:340 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in.