Keita, Kiwamu (WorkPermit 4806)

We placed the IOT2R table back in place (i.e. East side of HAM2). We have re-installed the light pipe that connects the lower left viewport of HAM2's east side to the table. The lexan guard of this particular viewport was then removed.

There was some mess on the optical table of IOT2R because of the PRC length measurement. We need to clean them up at some point. Also the GigEs on the table need the interior ethernet cables and feedthrough patch panels. They probably will be useful. The attached is a picture of the IOT2R after we placed it.

Jim and Dave.

at 15:57 PDT both h1seib2 and h1seih45 suffered a timing fault. The IOP IRIG-B timing channel showed a number of 336685 and 336687 respectively. All user models on these front ends stopped running. The IOP SWWD tripped, zeroing the DAC output voltages.

we were able to ssh onto the machines, and verify the IO Chassis were visible.

After getting permission from the HAM6 commissioning teams, we rebooted the two front ends using the sequence:

1. ssh onto the front end and remove them from the Dolphin network
2. power down the computers using the front panel power button
3. power up the computers using the front panel power button

Both computers rebooted and restarted all  their models with no timing errors. Commissioning time constraints due to staff at/in ham6 did not facilitate any lengthy diagnostics of the broken system.

Keita, Daniel, Kiwamu

In response to the too-low-power at HAM6 (see alog 13472), we revisited the IM4 trans power in order to make sure that there is no large loss in the input optics chain.

As a result, we confirmed that the incident power on IM4 is about 1.4 W. This corresponds to a throughput of PSL-IMC-Farday chain of 88%. This is consistent with the number that Giacomo and Paul gave us (see for exmaple, alog 9954). So we conclude that the IO chain is healthy.

==== (some details) ====

We measured the IM4 trans beam at the east side of HAM2. The power was measured to be 220 uW using a Ophir Vega without the filter on it.

According to the IO documents (E1300756 and E1300160), the relevant optics have the following properties:

• IM4 (SM2): T = 0.23%
• RH4: T = 7.24 %
• LH1: R = 92.23 %

Using these information together with the measured IM4 trans power, we estimated the power incident on IM4,

Power incident on IM4 = 220 uW / T_IM4 / T_RH4 / R_LH1 = 1.432 W

At the time of the measurement, the PSL power was at 1.620 W according to PSL_PERISCOPE_A_DC.

Therefore the throughput of the PSL-IMC-Faraday chain is

throughput = 1.432 / 1.620 = 88.4 %

8:15-8:30 Morning Meeting
8:33-Heading to End Y for B-K hammering work - T. MacDonald
8:35-Crystal chiller has been refilled (added 250 ml of water to bring the level up to maximum) – Operator
9:22-Checking mobility camera in HAM3 - Travis
9:24–Heading to work in the optics lab - Nathan 
9:55-LN2 delivery – Praxiar
10:09-Reset HEPI overflow counters for HAM3, HAM4, ITMX, and BS – Operator
11:16-Water delivery - Paradise 
11:35- Heading into the LVEA (HAM2 area) – Kiwamu/Keita
11:52-Working at End X – Krishna
12:55-Heading to End Y for cleaning – Karen
13:17-Back from the LVEA – Kiwamu/Keita
14:23-Returned from End Y – Karen
14:40-Working in the LVEA (craning) – Kyle
15:01-Finished working in the LVEA – Kyle
15:14-Moving Leak Detector Setup from the LVEA to End X – Gerardo/Filiberto

Note: Analog video cameras were not working today (see Alog# 13487)

Further to making the Beckhoff Ethercat PLC systems more visible to the control room, I have created "GDS" looking screens for the nine PLC systems and linked them to the CDS OVERVIEW screen in the "SLOW CONTROLS" section.

The NTP clients on the three Windows-based Ethercat computers has been set to use a server at 10.20.0.6, and the interval for checking shortened from one week to 1 hour after finding the clocks to be off by several seconds.

[Jim Arnaud]

This morning the quad iop and sus models of the staging building were restarted in preparation of future testing of QUAD09. The system would restart with wrong filters engaged (the 'norm' filters of the damping were on, whereas the input is not calibrated in um), so a new burt was saved with the good config.

Attached are some notes for testing QUAD09 in the staging building, as well as how to start the models

Jim, Dave

All systems (except h1psl0) were upgraded to RCG2.8.5 last week after the power outage. RCG2.8.5 has the bug fix which permits the IOP to disable the SUS DAC anti-imaging chassis via a keep-alive signal outputted from the 18bit DAC card.

Today we tested the control of the AI chassis using the ETMY/TMSY suspensions system via the IOP model h1iopsusey. Jeff K and Arnaud P gave us permission to use the EY suspension systems.

All the tests passed.

Here is what we did:

1. used guardian to put h1susetmy and h1sustmsy into the SAFE state
2. verified all AI chassis were active (green LED on back are ON)
3. killed the models h1susetmy and h1sustmsy, verified that now no models were using any DAC channels, the IOP model deactivated the AI Chassis, relays were heard to close, green LEDs all went OFF.
4. started the models, untripped the user watchdogs. Verified that now models are using the DAC channels, the IOP activated the AI Chassis, green LEDs all ON.
5. bypassed the SWWD on h1seiey so if the SUS test exceeded 5 mins the SEI system would not trip
6. PANIC crashed the TMSY SWWD, verified all the AI chassis were deactivated (green LED all OFF)
7. removed the PANIC and RESET TMSY SWWD, verified all the AI chassis were activated (green LEDs all ON)
8. PANIC crashed the ETMY SWWD, verified all the AI chassis were deactivated (green LED all OFF
9. removed the PANIC and RESET ETMY SWWD, verified all the AI chassis were activated (green LEDs all ON)

This concluded the test. The BYPASS on h1seiey was removed. Guardian put both ETMY and TMSY into the DAMPED state.

Maintenance: Reset HEPI overflow counters for HAM3, HAM4, ITMX, and BS.

Andres reported that the analog video feeds in the control room weren't working.  The matrix switcher in the MSR was plugged in, but did not appear to have power.  I unplugged it, waited a few seconds, and plugged it back in and it powered up.  There was nothing that looked amiss with the power supply module or any of the boards accessible from the front of the chassis.  It may have been a power glitch, or the power supply is getting flaky in it's old age.  It appears to be a modular type under the cover, so it may be easy to replace if needed if it is still available commercially.

Crystal chiller has been refilled (added 250 ml of water to bring the level up to maximum)

J. Kissel, K. Venkateswara

Because we continue to find the reference mirror signal -- a proxy for the autocollimator noise -- to be a useful signal to judge where the Beam Rotation Sensor's noise floor lies, we've output this channel out of the laptop's DAC, and piped it into the H1 ISI EX ADC on Channel ADC_0_29, and stored it in the science frames at 256 [Hz]. We expect the reference mirror to be stable, so we've not applied the very-low-frequency 1 [mHz] high-pass, but otherwise the calibration of the signal is identical to that of the beam balance mirror (see 13448):
3.5e-6 [rad/pixel] * 1 [pixels/V_sing] * 1/2 [V_sing / V_diff] * 40/2^16 [V_diff/ct] * 1e9 [nrad/rad] =  1.0681 [nrad/ct]
This gain, called "cts2nrad" has been installed into FM1 of the H1:ISI-GND_BRS_ETMX_REF filter bank, as with the beam balance mirror.


This required a recompile, reinstall, restart, and restore of the H1ISIETMX. We have not yet reboot the frame builder, so it remains with a 0x2000 status until the next DAQ restart at a more convenient time. I've committed the changes both the top-level h1isietmx.mdl model, and the H1ISIETMX.txt filter file to the userapps repo. We haven't yet added the filter bank to the BRS screen, but we'll get there.

WP 4790 - The default NDS server has been changed back to h1nds1 for the control room workstations.  This affect new logins or new shells. Existing shells and programs should not be affected.

Attendees: Fred, Richard, Robert, Daniel, Keita, Patrick, Ed, John, Jodi, Jim, Jeff, Kori, Travis, Gerardo, etc 

Today's Tasks:

•	H1 EX BRS Installation/ More debugging and data analysis - Krishna
•	ETMY HEPI/Chamber system B-K Hammering work continues- Jeff K/T MacDonald
•	Cable work at corner station – Richard
•	3IFO (Quad #9) assembly continues in Staging Building – Jeff B.
•	Staging Building/Setting up computer for Quad9 testing – Arnaud

Daniel, Jim, Dave

The status of the Beckhoff IOCs was missing from the control room. This was highlighted by their slow recovery following the power outage last week. As a first attempt to make them more visible, I have added their current time EPICS channels to the CDS STATE_WORD overview MEDMS (large and small versions). This immediately paid off, as we found the end station IOCs were not actually running, Daniel restarted them. We also noticed the OPI computers' times were off from each other by 2 seconds, so we need to NTP these machines today.

Hopefully better diagnostic channels, like UPTIME, can replace the current time on the overviews.

For the purposes of integrating Beckhoff "front ends" with the DAQ FE, I'm going to make a "GDS" screen per PLC which gives top level status info like STARTTIME, CODELIST, etc.

[Dan, Alexa, Koji]

We measured the beam geometry on HAM6 after the rotation of the septum window.
The new beam is actually going up by 1.9mrad, in stead of previous going down by 4.3mrad.
The beam height entering HAM6 is too low from the beginning, this upward angle gives us
the right height of the spot on OM1 in sub-milimeter presicion. In the horizontal projection,
The new beam is almost overwrapped with the designed path.

Attachment 1: Measured height of the beam on the HAM6 table.

Attachment 2: Summary of the beam geometry.

AS, KA, DH

As part of the HAM6 alignment work, we used OM1 to center the beam on OM2, and adjusted the OSEMs to the proper half-open-light values.

Thanks to the rotation of the septum window by Keita et al., the beam was well-centered on OM1 (see Koji's post on the new beam alignment in the chamber).  We had to perform some not-so-gentle manipulations of the pitch adjustment screw at the bottom of the mirror holder to get the OM1 mirror to pitch enough forward that the beam was centered on OM2.  In the end this required the use of an extra class-A nut to properly balance the mirror, and the removal of the tip-tilt's backplane (which holds the OSEMs) to allow us to access the mirror holder (and the screw hole) from the back.  There were some tense moments of tip-tilt frustration, but in the end the screw+nut combination was just right for the pitch adjustment.

Once the beam to OM2 was aligned we checked the OMEM DC values and adjusted LL and LR to center the flags.  The flag of the LL magnet is no longer touching the side of the OSEM (although it is close).  The attached spectrum shows the OSEM signals for OM1; the mirror is free, the damping works, the beam is in the right place, we are happy.

(Koji, Dan, Alexa)

We first centered the beam on SR2 by adjusting SR3. We looked into HAM4 using the analog camera and we centered the beam around the aperature in front of SR2:

(SR3 original position: P 500 Y -150)

BOTTOM: P 513 Y -100

TOP: P 428 Y -100

RIGHT: P 464 Y -138

LEFT: P 464 Y -98

FINAL SR3: P 464 Y -118

Next, we adjusted SR2 to center the beam onto SRM/FI via the analog camera looking into HAM5:

BOTTOM: P 4154 Y 1770

TOP: P 599 Y 1770

LEFT: P 2376 Y 3420

RIGHT: P 2376 Y -100

FINAL SR2: P 2376, Y 1660

To fine tune SR2, we examined the beam in HAM6 and found the positions when the beam disppeared:

Dark  in pitch:

P 2546, Y 1660

P 2006, Y 1660

Dark in Yaw:

P 2276, Y 2061

P 2276, Y 1482

FINAL SR2: P 2276, Y 1771

In this configuration we measured the power in HAM6 to be 2.6mW with ~1600mW at the PSL periscope PD.