david.barker@LIGO.ORG - posted 17:49, Tuesday 06 May 2014 (11740)
Projector bulb replacement
We replaced the bulb on the right-hand projector today (the one closest to the MSR).
We replaced the bulb on the right-hand projector today (the one closest to the MSR).
Kyle soft-closed GV7 and GV5 for TCS alignment work on BSC1 and BSC3 at 9:00 am.
I opened GV7 and GV5 after alignment work was done, last valve open by 3:00 pm.
I copied the filter kHz2um from EX to EY, and modified the xml file to have them engaged permanently. This way we have the L2L SUS transfer functions in um/cts.
(Alexa, Daniel)
We went on ISCT1 to install a new interference path to measure the difference between the PSL sampler beam and the POP beam. This will allow us to measure the path length variations on the input path relative to the green path.
We installed a new 50:50 beamsplitter in the rejected beam of the first dichroic after the SHG. This picks of the red beam coming from the PSL (and some left-over green). Next, we added a new beam path from the POP beam to the other input port of the beampslitter. Currently, there is no detector and all beams are dumped. The 50:50 splitter in the POP path is still missing as well.
We readjusted the green beam path coming from the PSL to eliminate the clipping on the cube polarizer.
8:00 Crystal chiller refilled (180 ml added)- Operator 8:51 GV5 and GV7 soft closing – Kyle 8:56-14:11 Heading to the TCSx area – Matt/David 9:06-9:58 Heading into the LVEA (supervision) – Mike 9:16-11:45 Going to End Y for ESD work – Richard/Filiberto 9:4412:04 Contamination Control work – Jeff B/Margot 9:49-11:47 HEPI Pump #8 maintenance – Hugh/Cori 9:50-12:10 HAM4 Scraper baffle work – Betsy 9:54-11:39 Heading into the LVEA for SR3 alignment setup – Jason 10:10-12:00 Cavity baffle work in LVEA test stand West bay area – Travis/ Mitchell 10:30 Reset of HEPI L4C Accumulated WD Counters – Operator 10:38-12:00 Heading to End Y to set up a camera – Sheila 11:25- Shutting down fw0 to transfer trend data – Jame B. 12:49-14:00 Cleaning work at End Y – Karen 12:49- Cleaning work at End X/Mid X – Chris 13:19- Working in the Optics Lab – Justin 13:26-15:25 Back to Cavity baffle work in LVEA test stand West bay area – Travis/ Mitchell 14:16 LVEA transitioned to LASER HAZARD - Justin
Right now, the best configuration for the ISI-BS is the following:
HIGH_ISOLATED on ST1
DAMPED on ST2
This specific configuration is not possible with the guardian manager (SEI_BS) for now: if you put ISOLATED with the manager, both stages are going to go to HIGH_ISOLATED.
Thus, the temporary solution is to PAUSE the guardian manager and to use the individual guardians (ISI_BS_ST1 & ISI_BS_ST2).
Jamie will be here next week and will fix this situation.
I pulled the IAS PLX periscope off of the table today and stowed it. Then, Margot helped me stage 2 of the 4 baffles destined for HAM4 today, but I discovered the 1) the SR2 suspensions needed additional work and 2) the cookie cutters for the baffles needed hardware. Back at laser hazard now, I am breaking to do other stuff - will continue HAM 4 table top payloading tomorrow morning.
Corey & Hugh Although we don't have to take the Pumps down to grease them, I used the need to grease as excuse to practice taking them down. We changed the ACC & DECelleration times from 1 to 300 seconds to allow the other running pumps to compensate for the one spinning down. This combined with closing the outlet valve to prevent the pump from reversing was not sufficient however to eliminate glitches in the pressure and the Actuators. Attached are trends from the Pump System and BSC2. You can see the motor drive changes, CH2, during the transitions from 4 to 3 pumps and back; as well as, the pressure changes usually at the beginning or end of the transition but not just there. Also, looking at the other channels on the graph, you can see glitches in the local IPS and Cartesian channels of the BS HEPI, Cartesian CPS channels and BS ISI Witness channels. In the second attachment I've zoomed into the second transition from 3 back to 4 pumps. This is when we had the largest glitch in the pressure and you can see it strongly make it into the M1 Witness channels. The glitches didn't show as strongly in the velocity sensors as much so I don't include any of those although I wouldn't say they were unaffected. The first plot is 2 hours long and we were on 3 pumps for about 45 minutes as Corey and I figured out how to make a grease gun work. During the 3 pump running time, it seems many of the HEPI & CPS signals are noisier. Happy to accept guidance on evaluating if this is a configuration we want to avoid, that is, 3 pumps versus 4.
The "in chamber" SR2 open light values are :
M1T1 25373 1.182 -12686
M1T2 26012 1.153 -13006
M1T3 24840 1.208 -12420
M1LF 30482 0.984 -15241
M1RT 24731 1.213 -12366
M1SD 25027 1.199 -12513
M2UL 24112 1.244 -12056
M2LL 26045 1.152 -13022
M2UR 23920 1.254 -11960
M2LR 25085 1.196 -12543
M3UL 24821 1.209 -12410
M3LL 24674 1.216 -12337
M3UR 23869 1.257 -11934
M3LR 23932 1.254 -11966
A new safe.snap was made and the spreadsheet E1200343 was updated
Note - I asked Arnaud to recheck these since we already had the lower stage OSEMs pulled back for the IAS alignment. As well, I discovered that the top mass blade tip EQ stops are the rattle-loose kind so I need to now swap them in-chamber. So, I pulled the top 6 BOSEMs off as well - a good time to recheck the OLV settings of all OSEMs.
Today while doing the PSL check I found the ISS Diffracted Power out of range (5-15%). It was about 41.6 %. With Sheila assistance I was able to fix it by incrementing the ISS Reference Signal value.
Framewriter 0 was stopped for a few minutes to move the raw minute trend directory to a different name. The raw minute trend data will be copied to the SATAboy hard disk array over the next couple of days, so older raw minute trend data will not be available from h1nds0 during that time.
I prepared two new GigE camera that are for monitoring the ALS X and Y green light. Currently the cameras and interior cables are temprarily put on the left corner in ISCT1. The external ethernet cables are not yet pulled and hence no ability to use them in the control room at this moment. The attached shows a picture of the cameras, their mounts and serial numbers of them.
The following HEPI Saturation Counters have been reset: HAM4 ITMx(BSC3 BS ITMy(BSC1) ETMy(BSC10)
Find attached the watchdogs trips summary of last week/beginning of this week. We'll discuss about it during the SEI portion of the testing meeting today.
8:15-8:35 Fred, Richard, Cyrus, Betsy, Richard, Filiberto, Aaron, Gerardo, Jeff B, Matt, Bubba, Travis, Hugh, Pablo, Mitchell, Justin, Mike, Thomas, Jeff K, Margot, etc. • TCS tables work continues. – (Matt, David, Thomas) • Contamination Control activities on HAM5 - (Margot/ Jeff B) • Getting SR3 ready for installation after reviewing the Hazard Analysis document- Jeff B • Continue Scraper Baffle work on HAM4 – (Betsy) • ESD work at End Y – Richard • Assembly work continues in Staging building – Jim • Suspension stages work continues(maintenance) – Jeff K • HEPI work (maintenance) - Hugh • Cavity baffle work in LVEA test stand - Travis/Mitchell
Crystal chiller refilled (180 ml added).
model restarts logged for Mon 05/May/2014
2014_05_05 00:37 h1fw0
2014_05_05 15:34 h1fw0
2014_05_05 16:30 h1fw0
2014_05_05 16:35 h1fw0
2014_05_05 16:39 h1fw0
2014_05_05 16:58 h1fw0
5 unexpected restarts followed by a reboot.
