Daniel, Ryan S, Erik, Jonathan, Dave

In preparation to tomorrow's work on h1susauxb123 we decided to move the EDC from here to h1susauxh56. We did this at the same time the DAQ was being restarted for:

1 Daniel's new h1lsc model

2 Adding Ryan's JAC_LOCK guardian node to EDC

The EDC move had a few configuration issues which were quickly resolved. There were no issues with the h1lsc restart.

TITLE: 01/13 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Laser safe in the LVEA this morning for some craning and cabling, both in-chamber and out, but now back to laser HAZARD for more JAC installation and SQZ beam alignment this afternoon.
LOG:

(Travis, Dave, Gerardo)

Dave noted and reported a rise on vacuum pressure at X-End.  Since, Travis and I were in the control room, we quickly determined that the controller for X2-8 ion pump was not working.  I drove down and found the high voltage disabled/off at the controller, and on on the screen the following note:"An excessive arcing condition has been detected (Error10)".  No guidance found on manual, snapped a photo to submit later to vendor.  I restarted the system and the HV started, controller hummed and crackled and was only able to get up to 600 Volts, all while making noise, and one point some funny smell came out of the inside of the controller, HV was disabled, time to replace the unit.

Closes FAMIS#27662, previous check in alog84918. No new issues with any dust monitors.

**PSL Anteroom and Laser Room will be done at a later date when going in there is required for other tasks by Ryan Short.**

For the CS dust monitors.

LVEA: 

HAM1 / LVEA5: On the +Y side of the HAM1 CR. Passed the zero count on the first round, and the flow was 2.8. PASS

HAM1: An additional spare DM on the -Y side of the HAM1 CR. Passed the zero count on the first round, the flow was a bit high at 3.0 so I adjusted it down to 2.8. PASS

HAM7 / LVEA6: Passed the zero count on the first round, and the flow was 2.8. PASS

Biergarten / LVEA10: Passed the zero count on the first round, and the flow was 2.8. PASS

DR: This DM was frozen when I got to it. Passed the zero count on the second round (first round had 2 cts of 0.3 um), and the flow was 2.8. PASS

Optics Lab: Passed the zero count on the first round, and the flow was 2.8. PASS

VPW: Passed the zero count on the second round (first round had 1 ct of 0.3 um), and the flow was 2.8. PASS

CER:

All the old grey HHPC handheld dust monitors in various states of degradation, none of them can take a full sample on power or battery without dying. I've removed the last one of this model I found in the CER and added it to collection of the other broken ones.

I tested the last spare GT521s left in the CER as well which I had borrowed from the FCES (s/n R16420). It passed the zero count test on the 2nd round (first round had 1 ct of 0.3 um) and the flow is 2.8. PASS

For the OUT building dust monitors.

EY: Passed the zero count on the second round (first round had 1 cts of 0.3 um), and the flow was 2.8. PASS

EX: Passed the zero count on the second round (first round had 1 cts of 0.3 um), the flow was a little low 2.65 so I went to adjust the pump in the mechanical room. These new vacuum pumps' adjustment knob seem touchier than the old one. It was at 19.5 inHg, I adjusted it up to 20 but it would stay at 20, it kept slowing increasing in pressure. I watched it slowly build up to almost 22 after I adjusted it up slightly to 20. I ended up bringing it back down to as close as I could get to where it was. I ended up around 19.8 inHg which brought the DM flow back to a little over 2.7, within the 5% margin of error. PASS

Mon Jan 12 10:05:34 2026 INFO: Fill completed in 5min 30secs

TITLE: 01/12 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 8mph Gusts, 4mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.59 μm/s 
QUICK SUMMARY: JAC install and HAM7 alignment will continue today after craning finishes in the LVEA and it's transitioned back to laser hazard.

[Tagging SEI] The ETMX CPS glitched over the weekend, tripping both stages of the ISI, and I am unable to reset it without it tripping again immediately. Since ETMX isn't crucial for planned work today, I'll wait until Jim gets in and consult with him.

Regularly scheduled fill at 10:00 did not run because both thermocouples were above the +30C nominal max limit [31C, 34C] presumably due to icing around the TC and/or Ref Junction.

Sun Jan 11 10:00:00 2026 ALARM: Abort run, Both Thermocouples BAD

I made a temporary change to the configuration to increase the nonimal TC-MAX to +40C and scheduled at 10:50 run.

Sun Jan 11 10:58:34 2026 INFO: Fill completed in 8min 30secs

This appears to be a good fill. The settings will be restored to nominal for tomorrow's fill.

Sat Jan 10 10:09:50 2026 INFO: Fill completed in 9min 47secs

[Jason, Jennie, Betsy, Keita, Sophie, Masayuki]

Initial alignment (1/8)

• For the initial JAC alignment, we need to scan with laser frequency since we didn't have JAC PZT actuation. The laser frequency was swept by changing the laser crystal temperature from −0.13 K to −0.05 K with a period of 30 seconds.

• The alignment was adjusted to suppress higher-order modes resonance. The actuators used were the PSL PZT and the fixed Siskiyou-mounted mirror that replaced the JM1 tip-tilt suspension. I worked inside the chamber while Jason controlled the PSL PZT via MEDM. Beam walking was performed by moving the PSL PZT first and optimizing alignment with the other mirror in the chamber. Note that due to the HAM1 periscope rotating the beam axis by 90 degrees, the pitch and yaw of the PSL PZT are effectively swapped in the JAC coordinate basis.

• As a result, moving the PSL PZT by approximately 1000 counts in pitch (corresponding to yaw in the JAC basis) achieved an alignment good enough to observe the TEM_{00} mode. Further alignment will be performed using the transmission PD signal.

JAC wiring (1/8)

• After discussion, we decided to delay installation of the reflection path. Since PDH locking using the reflection RF PD was therefore unavailable, we proceeded to align the TRANS DC PD and aim for shoulder locking using this signal.

• In the nominal design, the TRANS PD receives light from the JAC leak port (~0.3% of the input power), picked off by a laser window with 0.7% reflectivity. However, with the current PSL power of ~100 mW, the available light was insufficient. Therefore, the TRANS PD was configured to directly receive light from the leak port without a laser window.

• Due to a mistake, a post that was 0.5″ too short was prepared for the DC PD mount, and no suitable replacement was readily available. As a temporary configuration, the PD was mounted in a base–dog clamp–post–dog clamp–PD stack, using a 0.25″-thick dog clamp as a spacer.

• In-vacuum cables were also wired. From the feedthrough (D4F10), a DB25 cable (D2500336) splits into three branches: TRANS PD, PZT & thermistor, and heater & thermistor. Since the ALS beam runs adjacent to the JAC, cable routing clamps were used to avoid interference with the ALS beam (see attached photos).

Wiring confirmation (1/9)

• To enable locking using the TRANS PD, we confirmed that the corresponding signal path exists in the CDS infrastructure added by Daniel. In the H1LSC model, ADC2 channel 10 is assigned to the DC PD and routed through the dither locking module to the JAC PZT output.

• In the analog path, the DCPD output from the JAC interface chassis is connected to the auxiliary PD concentrator, and its monitor port is routed to the DAC via the D-sub patch panel. Both the fast and slow channels were confirmed to be correctly connected using the actual PD signal.

• The polarity of the PZT wiring was verified. For this test, the DB9 connector of the PZT & thermistor cable (D2500336) on the JAC side was disconnected, and gold pins were inserted into pins 5 and 9 of the feedthrough-side female connector (the PZT inputs). A 100-count offset was applied to the JAC_SERVO filter bank output driving the PZT, and the voltage between pins 5 and 9 was measured with a multimeter. To avoid high voltage during this test, the HV amplifier was powered by an 18 V supply instead of the nominal HV source.

• Toggling the 100-count offset resulted in −10 V (off) and +9 V (on). The same behavior was observed when measuring the PZT driver output directly, confirming correct cable connections and no risk of reverse loading the PZT.

• These voltage levels were not considered reasonable for normal operation, so Daniel was consulted. The likely explanation was operation with the 18 V supply instead of the HV source. After reconnecting the HV supply, injecting the laser into the JAC, and applying a ramp signal to the PZT, motion of the PZT was clearly observed in the transmission signal.

• The TRANS PD was re-aligned, and the signal observed on MEDM was maximized.

• The thermistor connection was also verified, yielding a reasonable reading of approximately 22 °C. Heater testing has not yet been performed, but functionality of the PZT, thermistor, and PD has now been confirmed.

Optics preparation (1/9)

• In parallel with wiring checks, preparation of the optics on the JAC output side was carried out.

• An issue was found with a newly fabricated ISC post (8-32 variant) intended for the lens mounts; it was confirmed that the standard D1000968 post works without issue. Keita and Sheila located suitable posts in the staging building, and three lens mounts were assembled using these posts.

• Attempts to peel the First Contact from the lenses were unsuccessful, as the FC layer was extremely difficult to remove, and we gave up. Applying FC to spare optics is considered the fastest path forward, and for the stuck FC, reapplying FC to soften it may be necessary.

• HR mirror preparation was also performed.

• Further details of the optics preparation will be posted shortly by Keita.

TITLE: 01/10 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: More JAC installation and HAM7 beam alignment today. The LVEA is now Laser SAFE in preparation for craning on Monday morning.
LOG:

Kar Meng, Sheila

Today we shifted the beam in SFI2 to be more centered on the second polarizer, to hopefully get rid of our scattered light shelf, and aligned the beam coming off the VIP to an iris in front of ZM4 and two irises on SQZT7, by moving B:M3 and B:M4.  After this we let the beam through the viewport into HAM5.  We see some light on AS_C, AS_A and AS_B, but it is not well aligned onto those diodes and we had trouble engaging the AS centering loops.  

Since we shifted the beam in SFI2 we have misaligned it onto the FC QPDs, we can see this beam is now clipped on the lens D:L1.  We were able to realign onto this my moving B:M3, but this misaligned the beam in the main path irises. 

Daniel, Ryan S, Dave:

h1lsc: We installed Daniel's latest model, a DAQ restart was required.

Slow controls: Daniel's latest INI files were added to the DAQ, an EDC restart was required.

h1ascimc: Daniel found some ADC discrepancies, I fixed them at the top level of the h1ascimc model. No DAQ restart was required.

Following the restarts of the h1lsc and h1ascimc models, the DAQ+EDC were restarted in the order: 1-leg, EDC, 0-leg. There were no problems with these restarts.

FAMIS 38864

Looks like at the power outage on December 4th there was either a significant drop in pressure at pump station 1 or a setting was lost that changed the readout. A jump is also seen at that time in the output voltage. Otherwise, trends look steady.

FAMIS 27706

Laser Status:
    NPRO output power is 1.83W
    AMP1 output power is 70.47W
    AMP2 output power is 140.3W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 0 days, 23 hr 31 minutes
    Reflected power = 26.88W
    Transmitted power = 104.5W
    PowerSum = 131.4W

FSS:
    It has been locked for 0 days 23 hr and 30 min
    TPD[V] = 0.4004V

ISS:
    The diffracted power is around 4.0%
    Last saturation event was 0 days 0 hours and 0 minutes ago

Possible Issues:
    PMC reflected power is high

Closes : Famis 27647 Using Vibration Sensors To Gauge Health Of HVAC Fans. 

Vibrometers look fine and don't seem to be abnormally performing yet. 
 

Fri Jan 09 10:07:59 2026 INFO: Fill completed in 7min 55secs