POP path alignment, Friday morning (Tyler, Betsy, Camilla, Sheila, Keita)

We ended up using pico in HAM3 to bring down green ALS beam as well as IR POP rather than raising the top periscope mirror after confirming that it was safe to do so.

We first confirmed that the X arm and corner alignment were still the same as yesterday. X arm was still locked to 00 green, and when I misaligned PRM the IR flash in H1:LSC-TR_X_IN1 was reaching 0.8 or more.

We convinced ourselves that the alignmernt was reasonable and probably similar to the alignment before the vent, that the ALS beams were pretty high but was still hitting the top periscope mirror before just like ALSX beam is as of now. We discussed the use of the pico in HAM3 (instead of moving the top periscope mirror up) and decided that it's OK to do so as far as the IR beam is far from clipping somewhere in HAM2.

We moved the HAM3 pico for PIT in "Down" direction by 700 counts and the IR beam position looked about right. We moved the pico further down by 1000 counts (that's the total of 1700 counts down from the initial state) and the IR beam missed the bottom of the top periscope mirror but no sign of clipping in HAM2, so we were comfortable to go 1000 counts "UP" and search for an optimum positision. In the end we ended up going back to 700 counts "Down" relative to where we started.

Sheila and Camilla adjusted top and bottom periscope mirror. M10 (dichroich) was also touched up. Steering mirrors for in-air beams were also roughly adjusted, These are M7 (for REFL air), M11 (for green ALS), M13 (for IR ALS beam from the PSL) and M16 (for POP air).

Now we're ready to move ISCT1L in position to confirm that all beams hit the periscope mirrors on the table.

 

Fri CP1 Fill

Fri May 09 10:12:08 2025 INFO: Fill completed in 12min 5secs

Gerardo confirmed a good fill curbside.

Friday morning Ops Report

TITLE: 05/09 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: LIGHT_MAINTENANCE_WINDY
    Wind: 6mph Gusts, 3mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.11 μm/s
QUICK SUMMARY:
LVEA is LASER HAZARD

The Expected work to day is probably :

• More Wind Fence work
• HAM 4 & 5 Cable Tray Work that may use some craning
• LASER HAZ work for PSL_IN@200mW for initial beam path alignment work.
• CDS work:  h1iopseih16, h1pslfss, h1sushtts
• Viewport simulator on HAM1
• ~Install PM1, cable up, start troubleshooting, ground checks
• X-ARM PEAK for ALS Beam alignment in HAM1
• HAM1 RM1 troubleshooting ground - alog missing pin 1
• Troubleshoot and Ground checks of LSC/ASC diode boxes
• CDS PEM work
• Are we done Peeking down x arm? Should we close the GV?

GV7 was temporarlily opened

Gerardo, Jordan, Janos

GV7 (X-arm manifold) was opened today, to make possible HAM1 optical alignment.
13:06 - all the turbos were valved out
13:12 - the gate valve started to move up

After ~4 hrs, PT-144 (vacuum gauge next to CP2 on the beamtube side) is at 3.7E-8 Torr, the pressure in the corner is <1E-7 Torr.

GV7 stays open overnight, then tomorrow there will be some more alignment work (following aLog 84323), and then GV7 will be closed again.
The turbo pumps are still running, and after GV7 is closed, they will be valved back to the corner.

The RGA (p-t) scans of the main peaks will be posted - in particular during the closure and the opening of GV7

ISC Alignment Work, Day 7 in HAM1 (May 8th): X arm peak,

Oli, Ryan C, Keita, Sheila, Rahul, Betsy, Jason, Jenne, Jordan, Camilla, CR Move crew....

This morning Tyler coordinated a move of the HAM1 cleanroom to allow space to later move ISCT1 into position. 

Rahul did some PM1 transfer functions but will need some more time troubleshooting PM1 voltmons.

Betsy and I started to check the alignments of the POP, REFL and PSL ALS beams out of the chamber. We found the PSL ALS beam was in the incorrect position and clipped on the light pipe so Jason and Keita fixed the ALS PSL beam in the PSL enclosure, details in 84320. Before lunch all beams were aligned as if headed to ISCT1 but dumped before leaving the ISI. 

We moved the POP ASC and LSC diodes to the locations suggested by Elenna in 84313, POP LSC diode about 140 mm from M15 and the POP WFS about 200 mm from M15. These still need to be aligned. 

We also began to check beams were hitting beamdumps and adjusted some beamdumps, Betsy changed the plates in DB17 so it could fit between the balance masses. Progress on checking all beamdumps in 84321. 

IMC input power back down to 2W and locked out, reminder that the input power need to be at 2W to lock and we should not leave the power at 20W overnight.

The VAC team opened GV7 and CDS team fixed the cameras (ALS cameras are on ISCT1 so we can't use them). Sheila aligned the X-arm in green, using the baffle align scripts as per 62024 plus ETM. then adjusted ALS PHD medm to use REFL PD rather than TRAN PD for locking and adjusted the "REFL locked power percent", took ALS_XARM guardian to LOCKED_SLOW_NO_WFS and adjusted REFL_A_PD nominal current to be 3.0mA when unlocked. The X-arm then locked.  Note that we didn't want to lock with green camera's as we don't trust them as references after a vent. Keita and Betsy verified that it was locked on a higher order 2-0 mode, off in PIT and that the green beam was too high on the periscope mirror. We later adjusted the ETMX (maybe TMSX) alignment and this improved to a 0-0 mode (verified by Betsy and dumped before leaving HAM1). We are able to hand-engage the green TMS ETM WFS and offloaded those.

When we went to re-verify where the POP flashes were located with this ITMX alignment, we couldn't get good POP flashes and needed to realign, notes below:

• Jenne and Sheila then spent time going back to yesterdays POP alignment and verifying we had good flashes and then walking the ITM back to where the X-arm was aligned using PRM. Looking at X-arm green flashes using H1:ALS-X_REFL_A_DC_NORMALIZED.
• Sheila and Betsy went out to HAM1 when they pitched PR3 to match pre-vent OSEMs, the beam height got worse, reverted.
• To get IR flashes in the arm (H1:LSC-TR_X_NORM_IN1) with PRM misaligned,  PR3 was restored to closer to the sliders of before the vent and PR2 to the OSEM values, both of these changes improved the flashes for IR-arm.
• Then Sheila set optics to PRX/PRMI configuration and aligned PRM to maximize POP flashes. 
• We are now happy with this alignment of X-arm green, X-arm ALS, MICH and POP.

At this point Betsy was able to see POP flashes and the green beam at the same time. Some photos of this are attached, we estimate there is about the 13mm vertical separation, as expected, between the POP and ALS beams, see photo. The green ALS beam gets to the bottom periscope mirror without clipping but is VERY close to the top of the top periscope mirror, photos of the upper and lower periscope mirror attached. Tomorrow we plan to slide the top periscope mirror up ~10mm to get both beams better centered on the mirror. We don't have range on the periscope pole to go any higher than this but this should be enough.

Betsy and Jordan set the viewport simulator using the HAM1 door laying on the floor and attached it to HAM1, the middle viewport is slightly off but we drew a template to show where the actual VP should be, on laminated paper/red pen on the shelves next to HAM1.

Tomorrow we will plan to slide to top periscope mirror up ~10mm and confirm both beams better centered on the mirror. We'll then need to check and adjust alignment of the POP path after this change and align the ALS beam onto M11 and off the table in the correct place. After this we'll roll/forklift ISCT1 to it's correct place and verify all 4 beams (currently dumped) leave HAM1 though the VP simulator and onto the periscopes of ISCT1. ISCT1 can then be removed and the GV closed. Final steps are then the POP M15, LSC and ASC diodes path, placing and checking all beamdumps and testing M15 picos.

Output Arm Cable Tray

WP 12492

The cable tray between HAM4 and HAM5 was modified to accommodate new cabling needed for O5. Three horizontal Tee’s were installed to transition the tray from a 1ft width to a 2ft width. The OMC turbo was isolated by the Vacuum team when working near the turbo pump.

S&K Electric

PSL Cooling Water pH Test

FAMIS 25315

pH of PSL chiller water was measured to be between 10.0 and 10.5 according to the color of the test strip.

OPS Thursday day shift start

TITLE: 05/08 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: EX wind fence work continued, more HAM1 alignment, ALS-Xarm alignment (GV7 opened).
LOG:                                                               

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
15:07	SAF	LVEA is Laser HAZARD	LVEA	YES	LVEA is Laser HAZARD	07:07
14:48	FAC	Chris	LVEA	Y	Cleanroom move	14:54
14:57	FAC	Nellie, Kim	LVEA	Y	Tech clean	16:19
14:59	FAC	Tyler, Chris, Eric	LVEA	Y	Clean room move	15:16
14:59	FAC	Betsy, TJ	LVEA	Y	HAM1 checks	15:24
15:02	FAC	Jim, Randy	EndX	N	Wind fence work	19:27
15:22	SUS	Rahul	Remote	N	PM1 TF	15:34
15:26	VAC	Jordan	LVEA	Y	Purge air checks	15:42
15:40	FAC	TJ	EndX	N	WInd fence work	19:26
15:56	PSL	Oli	LVEA	Y	Reenergize rotation stage, lower power to lock imc	16:06
16:00	ISC	Camilla, Betsy	LVEA	Y	HAM1 alignment work, camilla out 18:20	18:54
16:07	FAC	Tony	EndX	N	Wind fence work	19:26
16:21	EE	Fil, Marc	CER	Y	SUS issues troubleshooting	16:53
17:14	VAC	Jordan	LVEA	Y	Open RGA valve	17:20
17:20	PSL	Keita, Jason	LVEA, PSL encl	Y	Inspect beam path, ALS	18:37
17:35	FAC	Chris	EndY then X	N	FAMIS checks	18:25
18:03	PSL	Oli	LVEA	Y	Renergize rotation stage to relock IMC	18:12
18:03	EE	Marc, Jackie	LVEA	Y	Cables for RMs, racks by psl encl	19:02
17:55	CAL	Rick	PCAL lab, optics lab	LOCAL	Checks	18:07
18:32	ISC	Camilla	LVEA	Y	Check on HAM1	18:56
18:56	PSL	Oli	LVEA	Y	Bring down IMC power to 2Ws	19:01
19:49	VAC	Janos, Gerardo, Jordan, Jackie	LVEA	Y	Open GV7 for the XARM	20:30
20:11	FAC	TJ, Tony, Jim, Randy	EndX	N	Wind fence work, TJ out at 21:40	22:15
20:16	SUS	Jeff	Optics lab then LVEA	Y	Assemble part in optics lab then bring to HAM6 racks	20:51
20:40	ISC	Keita, Betsy	LVEA	Y	HAM1, Keita out at 21:40	22:17
21:13	VAC	Jordan	LVEA	Y	HAM1, help Betsy	22:11
21:27	SUS	Rahul	LVEA	Y	HAM1 check on PM1	21:32
22:16	EE	Marc	LVEA	Y	Look for notebook	22:19
22:19	ISC	Betsy, Sheila	LVEA	Y	HAM1 alignment	23:30
22:22	CDS	Dave	EndX	N	Check on network switch	22:41
22:30	ISC	Camilla	LVEA	Y	Join HAM1	23:30
22:55	PCAL	Tony	PCAL Lab	Y(local)	Check version number and maybe start measurement	23:11
23:28	PCAL	Tony	PCAL lab	LOCAL	Open shutter	Ongoing

Vacuum alarm reconfiguration whilst GV7 is open to X-arm

Following the opening of GV7 we got some expected VACSTAT and vacuum alarms.

VACSTAT was restarted now the vacuum pressures have stabilized.

Alarms was reconfigured to expect GV7 to be fully open (was soft-closed) and PT144B's upper alarm limit was increased from 2.0e-08 to 6.0e-08Torr (currently at 3.9e-08).

ALS PSL path on HAM1

Betsy, Camilla, Keita, Jason This morning, we took a closer look at eh small PSL-ALS beam path hitting the 1 and only mirror in HAM1 before heading to IOT1. It looked a bit clipped/elongated and was coming out of the light pipe toward the -Y side and veering off course onto the table (when compared to the new layout map). Given work on the path on the PSL table (for SPI), Jason and Keita went in to the PSL and revisited how the beam launches at the periscope. They could see scatter somewhere in the light pipe so it was probably clipping in there. Using the top ALS periscope mirror, Jason was able to yaw the beam back to the designed position of the mirror in HAM1 (Keita on the phone with Jason in the box, relaying to Betsy who moved the mirror and beam dump on HAM1). Now the beam looks nicely round, more centered in the entry viewport window, and runs along the table per the map we are aligning to D1000313-v19. We pointed the steering mirror so the beam leaves the table to also match the map. 

Next up is the X-arm peek and tweaking of alignments to get onto the IOT1 periscope mirrors.

Thu CP1 Fill

Thu May 08 10:12:38 2025 INFO: Fill completed in 12min 34secs

Gerardo confirmed a good fill curbside.

Morning Purge Air Checks 5-8-25

Dry air skid checks, water pump, kobelco, drying towers all nominal.

Dew point measurement at HAM1 -43.7 °C.

CDS environment EPICS IOCs now running on cdsioc0 under puppet management

I have created puppet rules to run each Geist ENV EPICS IOC as a systemd service on cdsioc0 (during testing they were being ran by hand on opslogin0). All of these services are now operational.

BTW, there is a new ENV overview MEDM which can be opened by clicking inside the ENVIRONMENT section of the CDS Overview, please see attachment.

ISC Alignment Work, Day 6 in HAM1 (May 7th): 20W now into IMC, POP beam profiles done.

Oli, Keita, Elenna, Jennie, Sheila, Ryan S, Rahul, Betsy, Camilla

Day 1: 84193, Day 2: 84228, Day 3: 84230 and 84239, Day 4: 84274, Day 5: 84292

• To work on REFL beam: need PRM aligned and ITMX or ITMY misaligned 
• To work on POP flashes: need PRM aligned and ITMX aligned
• To work on POP single bounce (low power ~30uW into HAM1 POP path for 20W from PSL): need PRM and ITMY misaligned 

In the morning Keita and Jennie aligned the POP flashes on the periscope mirrors and M10 dichroic. The height of this beam is 3.75" on these mirrors to account for the ALS green beam being 13mm above the POP beam. Keita was a little concerned about the height of the top periscope mirror so we'll need to check the green ALS beam carefully on this and if it 's near clipping we may need some in-vac pico-ing.

Rahul then moved PM1 to it's final position. Elenna and Rahul checked that the signed of the PIT and YAW sliders were correct. 

Shiela, Rahul and I then worked on centering the beam on PM1 and L2 without the 90/10 M12 in place, so that we could later have enough power to beam profile the POP single bounce beam. To get the beam height back up to 4" at PM1, Rahul needed to pitch PM1 mechanically. 

Oli then increased PSL input power to 20W, we aligned to POP single bounce and Sheila and I took beam profile measurements before PM1 and after L2, details in 84307.

Elenna, Rahul and I then replaced the 90/10 M12 and recentered the beam on PM1 and L2. We started aligning the POP air path but aren't happy with it, dumped the beam and will continue to work on. 

Betsy let in the PSL ALS beam into HAM1 by opening the light pipe and I dumped it straight away. See 84312.

Today we plan to: align the POP, REFL and PSL ALS beams out of the chamber, open the X-arm check the green ALS beam alignment on the shared optics and off the table, including rolling up ISCT1 and adding the VP simulator. The POP LSC/ASC diodes and all beam dumps still need to be aligned and checked. 

OPS Thursday day shift start

TITLE: 05/08 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: LIGHT_MAINTENANCE_WINDY
    Wind: 10mph Gusts, 4mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.13 μm/s
QUICK SUMMARY:

• More HAM1 aligning, EX wind fence
• THUR - X-ARM PEEK - GV open for ~a day

HAM1 POP path beam profile and distance measurements

location number on drawing	distance	horizontal 13.5% diameter [um]	vertical 13.5% diameter [um]	photo of profiler location	photo of profiles	photo of beam scan measurements
1	52 mm from dichroic M10	6243	64040	here and here	9022	9023
2	147 mm from dichroic M10	6202	6365	9028	9026	9027
3	119 mm from HR of 50/50 BS M15, also 295mm from center of lens L2	870	874	9031	9030	9029
4	153 mm from HR of 50/50 BS, approximate location of LSC diode	279	284	9035	9032	9033
5	128 mm from HR of 50/50 BS	721	726	9036	9037	9038
6	139 mm from HR of 50/50	483	490	9041	9040	9039
7	353 mm from HR of 50/50 BS	3280	3372	9042	9043	9044

Camilla made these measurements with 20W input power into the IMC, PRM and ITMY misaligned single bounce beam.  We didn't place the 90/10 BS M12 in the pop path yet so that we would have about 35uW to measure beam profiles. There's a rough pen sketch of where these locations are in this photo.

Camilla also made ruler measurements of some distances:

• PM1 to 50/50 BS M15 is 405mm
• PM1 to center of L2 is 229 mm
• center of L2 to M15 is 178 mm
• dichroic M10 to PM1 is 360 mm
• bottom of periscope  (M8 or M9) to dichroic M10 482mm
• HR side of M15 (50/50 BS) to front of LSC diode box is 158 mm, diode itself is 3 mm proud of diode box.

HAM1 vent work - PM1 (Tip Tilt suspension) installed in the chamber

This afternoon I went into HAM1 chamber and installed PM1 which is a Tip Tilt suspension (ICS link - D1001396-07, previously ZM1 in HAM5). PM1 is currently sitting at the edge of the table (as shown in the picture here) and will be later moved to its final position sometime this week. The suspension was clamped down with four dog clamps. The other information related to PM1 is listed below,

- The BOSEMs have the following serial number - D060106-C s/n 583, s/n 562, s/n 263, s/n 201

- The quadrupus cable for the BOSEMs have the following S/N - D1000234 - S1000695 (length 55in). 

I have applied the following offsets and gains in the OSEM input filter of PM1 and accepted it in the SDF, see here.

OLC	OFFSET	GAIN
26440	- 13220	1.13
28894	- 14447	1.04
24529	- 12264.5	1.22
29276	- 14638	1.02

 

 

 

 

I switched on the coil drivers (Rack C4 in the CER, page 14) and satellite amp (floor SUS R1, page 13), as per the systems wiring diagram for HAM1 - D0902810.

I am currently testing the electronics chain and will post the results (osem spectra and transfer function measurements) asap.