Displaying reports 70921-70940 of 83068.Go to page Start 3543 3544 3545 3546 3547 3548 3549 3550 3551 End
Reports until 09:59, Friday 27 June 2014
LHO General
justin.bergman@LIGO.ORG - posted 09:59, Friday 27 June 2014 - last comment - 15:30, Monday 30 June 2014(12509)
Morning Mtg

No change anticipated to corner station laser hazard configuration today.

Matt H/Corey - Continuing ISS prep work

HAM3 - ongoing work with 532 nm fiber-coupled laser (Kiwamu/Sheila)

ITMX - alignment looks ok...need to check Arnaud's TFs from last night

Jason may need to review ITMX alignment

EX - TCS will transition to laser hazard, finish populating the HWS section of ISCTEX and do some alignment work with the ALS laser

Richard M investigating heat concerns with racks at end stations

Calum presentation on contamination control

       -MEMO regarding particle counters T1400024

       -Tree showing where to start with contamination control knowledge E1400029

Comments related to this report
calum.torrie@LIGO.ORG - 15:30, Monday 30 June 2014 (12548)

Follow up on note with some additional information than that posted by Justin Bergman re: talk by Calum on Contamination Control on Friday 27th June at LHO.

1) LIGO-T1400024: Airborne Particle Counters (Handheld) - General Instructions and LIGO use

Jeff has now got 3 to 4 hand-held particle counters avaailble for sign out at the contamination area (on our right as you walk down Dycem flooring towards LVEA from cleaning area). An additional 4 unit are on order (2x for hand-held use and 2x to replace broken plumbed in units.) Convert and report all numbers collected in particles per cubic foot (#/ft3), or particles per cubic meter (#/m3) of air sampled. Jeff has the hand-held particles counters set to display particles per cubic foot (#/ft3) i.e. the paticle counter is taking care of the conversion etc ... Just to be sure please include a picture (when you can) of the particle counter screen.

 

2) LIGO-E1400029: LIGO, Contamination Control Training Material

Level 1 and level 2 are required reading. Most if not all of you have read these at some point. While this will be compulsory for all new staff and a refresher course will be offered soon if you feel you are in need of some additional guidance now please read and review the following: -

LEVEL I General Entry Cert to access any clean room space- All workers
LIGO-E0900047: LIGO Contamination Control Plan (PAGES 1 THROUGH 27 ONLY.)

LEVEL II Chamber Entry - in chamber workers
All documents in section I above plus
LIGO-E1201035: aLIGO Chamber Entry & Exit Procedures &
LIGO-T1400024: Particle Counters - Technical Note on How to use in the field

If you wanted to check agasint what you have just read you could also have a go at our quiz, see: -

LIGO-T1400177: aLIGO Contamination Control Quiz

H1 ISC
kiwamu.izumi@LIGO.ORG - posted 18:57, Thursday 26 June 2014 (12507)
HAM3 in-vac work: ongoing

[Sheila, Kiwamu]

We spent some time trying to align the simulated beam to the POP QPD sled today in HAM3. Since we got confused by ghost beams for a while, we were not able to finish aligning the beam.

We are aiming to get this whole mission done by the end of tomorrow.

We have set up a fiber-coupled green laser to simulate the red POP path. The output coupler of the fiber is set up on the in-chamber table with a clean base plate underneath it to prevent from contamination. The laser is collimated with a small collimator directly attached on the coupler. The laser beam is then steered by a temporary mirror such that we can perform a fine alignment by touching this mirror. We let the beam go through the scraper baffle and PR2 and all the way to the POP sled. However, in the course of the alignment, we think we got confused by a combination of a ghost beam and extremely dim main beam reflected by a BS in front of QPD_A. This actually had been known to be an issue (see alog 5774 and alog 5924), but we simply forgot this issue and went ahead without paying much attention. We then noticed, at some point, that we had screwed up the alignment by ourself. Sad.crying

In the tomorrow morning, we will resume the alignment work. Once it is done, we are going to move on to installation of the 90/10 BS and subsequent alignment recovery.

H1 PSL (PSL)
richard.savage@LIGO.ORG - posted 18:45, Thursday 26 June 2014 (12508)
H1 PSL Laser Room lights on when in "Science Mode"
I just noticed (or just realized) that the Laser Room lights were on with the Laser Area Enclosure in "Science Mode," i.e. HEPA fans off and HVAC units switched OFF.

Although the lights in the room are LEDs, this is way too much heat load for the room when the HVAC units are off.

In the future, we should always check the video displays in the control room to ensure that the lights are off when we are in "Science Mode" for the Laser Area Enclosure.
H1 General
matthew.heintze@LIGO.ORG - posted 18:18, Thursday 26 June 2014 (12506)
HAM2 particle counts Thurs 26th

Particle counts taken in HAM 2 during the day

Start of the morning work day reading taken in cleanroom:

0.3um........90 counts

0.5um.....40 counts

0.7um...20 counts

1.0 um....10 counts

Remainder...zero

 

Start of morning work day reading taken in chamber

0.3um.....20 counts

Remainder...zero

 

End of morning session reading taken in chamber

0.3um...180 counts

0.5um.....100 counts

0.7um....70 counts

1.0um....40 counts

2.0um.....40 counts

5.0 um...20 counts

 

Start of afternoon session, readings taken in cleanroom

Everything....zero counts

 

Start of afternoon session reading taken in chamber

0.3um....50 counts

0.5um....10 counts

 

End of afternoon session, reading taken in chamber

0.3um...70 counts

0.5um....50 counts

0.7um.....30 counts

1.0um...20 counts

Remainder.....zero

Images attached to this report
H1 SUS (CDS, SEI)
jeffrey.kissel@LIGO.ORG - posted 17:13, Thursday 26 June 2014 (12496)
SUS Hardware and IOP Software Watchdog Threshold Test, Take Two
J. Kissel, D. Barker

In the spirit of LHO aLOG 9204, we've shaken H1 SUS ETMY using H1 HPI ETMY in order to test the sanity of thresholds set for both the IOP Software WD (IOP SWWD) and the newly implemented Hardware Watchdog (HWWD). These values are currently set at 110 [mV] output of the RMS circuit (which is identical both in the HWWD and IOP SWWD), which via this test, is determined to be roughly 10 +/- 5 [um] or [urad] peak-to-peak (as reported by ISI ST1 CPS, SUS M0 OSEMs, and SUS L3 OPLEVs). See attached overall time-series of the entire test, whose timeline is below. This mount of motion has been blessed by my spider sense of "Wow, that's a *lot* of motion; it's giving me the willies. We should cut off SEI excitation after 10-20 minutes of this." Note that, gauging by the motion of speed-dials, this amount of motion is still *less* than what occurs if, say, Betsy and Travis are mechanically aligning the suspension, so it's still a conservative threshold (because, of course, when at vacuum, and the chamber is fully isolated no such motion should ever occur).

Things we've learned:
- The IOP SWWD and HWWD now have their threshold set to 110 [mV], equivalent to ~10 [um] or ~10 [urad] of motion, pk to pk.
- The RMS output of both the IOP SWWD and HWWD track each other quite well -- as long as the signal is above ~30 [mV] or ~3 [um] or [urad] -- only the IOP SWWD readout is more the accurate below these amplitudes.
- Driving a 0.1-to-10-[Hz]-band-limited, white noise excitation at he maximum amplitude of HEPI's DACs does not trip the IOP or HW WDs. One must focus the power at a given frequency to really ring up the RMS.
- The calibration from counts to mV for the HWWD RMS OUT channel -- for now, randomly stuck in H1:IOP-ISC_EY_MADC0_EPICS_CH30 -- is roughly 0.1 [mV/ct].

Why the HWWD user interface is icky, but it'll still work:
- (As mentioned above) the RMS output of the HWWD does not report any change unless there is a significant amount of motion already present.
- The RMS output of the HWWD is choppy -- performing a sample and hold on the RMS value, and jumps around by 10s of [ct], or a few [mV] under constant excitations.
- The three HWWD analog trip flag channels -- for now, stuck in H1:IOP-ISC_EY_MADC0_EPICS_CH27 through 29 -- are railed when not tripped, and low when tripped.
- The after entering value in the requested RMS voltage trip point, H1:SUS-ETMY_HWWD_RMS_REQ, the readback, H1:SUS-ETMY_HWWD_RMS_RD only returns a value *close* to what's been requested. Similarly the two readbacks, H1:SUS-ETMY_HWWD_TIME_RD and H1:SUS-ETMY_HWWD_TTF_SEI for the time until trip report values only *close* to the requested value, H1:SUS-ETMY_HWWD_TIME_REQ.

There's still a significant amount of hardware that needs installing / replacing before we can hook the HWWD up to actually kill ISI coil drivers and HEPI valve drivers, but we will now propogate these thresholds and this infrastructure to the remaining QUAD suspensions over the next week or so. We will also perform a similar test on HAM chambers once they become available, to set those SUS' IOP SWWD thresholds (or at least confirm that they should be the same.)

 Detailed Time Line
GPS Time    Amplitude    Notes
1087849965    100000     WN; Y, RX, RZ
1087850060    200000     WN; Y, RX, RZ
1087850199    250000     WN; Y, RX, RZ
1087850287    400000     WN; Y, RX, RZ
1087850326       HPI USER WD Trip
1087850348          start over
1087850484    300000     WN; Y, RX, RZ
1087850742    300000     WN RZ RX; 100000 ct 0.5 [Hz] Sine Y                       
1087850995     done
1087854054    Full bandwidth HEPI TF

where WN = white noise excitation, between 0.1 and 10 [Hz], and 0.5 [Hz] Sine = single frequency sine wave at 0.5 [Hz].

As in the original test, I turned OFF all control on the ISI and SUS, and turned OFF isolation control on HEPI. When ramping up the test, I began driving HEPI without turning off the ISI -- the ISI isolation loops survived through 20000 [ct] of HEPI excitation. 
Images attached to this report
H1 CDS (SEI, SUS)
david.barker@LIGO.ORG - posted 16:57, Thursday 26 June 2014 - last comment - 17:08, Thursday 26 June 2014(12504)
SWWD update at the end stations

Following the DACKILL naming decision yesterday, I installed the latest SWWD version of the IOP models at both end stations. The new models are: h1iopsusex, h1iopsusey, h1iopseiex and h1iopseiey. All user models were restarted as part of this install. The h1iopsusey model has test oscillators which sum with the SIDE OSEM signal. I was able to use the oscillator to test the SUS-to-SEI trip and verify SEI DACs are killed after 10 minute have elapsed. At EY I tested the system by PANIC crashing SUS which started the SEI countdown.

Comments related to this report
david.barker@LIGO.ORG - 17:08, Thursday 26 June 2014 (12505)DAQ

To support the HWWD and SWWD install/tests the DAQ was restarted. Note, the corner station IOP models were make/make-installed but not restarted today, which is why their DAQ status is now 0x2000. This will be remedied when these models are restarted at a later date.

H1 SUS
travis.sadecki@LIGO.ORG - posted 16:57, Thursday 26 June 2014 (12503)
Alignment of ITMx complete

J. Oberling, A. Pele, myself

Alignment of both M0 and R0 of ITMx have been completed, at least until someone tells us otherwise.  Pitch adjusters have been locked down and all levels of OSEMs tuned to medium-fine.  Stay tuned for alignment values and TF results.

H1 CDS (SEI, SUS)
david.barker@LIGO.ORG - posted 16:52, Thursday 26 June 2014 (12501)
Testing of the HWWD and SWWD at EY

Rolf, Jeff, Jim, Dave

This afternoon we tested the HWWD and new SWWD side-by-side at EY.

HWWD: the HWWD unit is connected in monitor only mode. Its front two monitor ports are cabled to the main-top OSEM satellite amps for ETMY. Its binary in and out cables are connected to ports 24-31 on the binary input and binary output chassis for ETMY. 3 of the 4 front panel BNC ports are connected to spare BNC ports on h1iscey's PEM AA chassis. The back RMS monitor BNC port is also connected to a spare BNC port on the h1iscey PEM AA chassis. We configured the system with a trip point of 110mV and a trip time of 2.0minutes.

SWWD: the h1iopsusey model was built this morning with the latest SWWD parts using RCG2.8.4. The hard-coded RMS trip point is 110mV.

h1susey: the h1susey model was modified to include a HWWD part to communicate with the unit via binary in/out. This required h1susetmy to be compiled against RCG-branch-2.8 to use the new part.

Jeff excited BSC10 at EY using the HEPI actuators. He will post the details in a separate entry. We were able to transition both the HWWD and SWWD to their count-down-to-trip state within the same second. In the attached dataviewer plot. Top Left: the analog voltage from the HWWD back RMS port (being read by h1iscey). Lower Left: is the EPICS channel from the HWWD part in the h1susey model. Top Right: F1 RMS EPICS channel from the SWWD model. Lower Right: output of the SWWD RMS port.

Within the same second, the HWWD turned on its PD front panel led and the SWWD transistioned its output from 1 (good) to 0 (bad). The HWWD RMS value was about 95 at the transition (950 on the plot but the h1iscey PEM AA chassis has an internal gain of x10).

Images attached to this report
H1 SUS
arnaud.pele@LIGO.ORG - posted 16:42, Thursday 26 June 2014 (12500)
overnight tfs will run on ITMx to check for rubbing

undamped main and reaction chain measurement started at 23:40:59 UTC.

LHO General
thomas.vo@LIGO.ORG - posted 16:06, Thursday 26 June 2014 (12499)
Ops Summary

    - Betsy and Travis out to LVEA for pit adjustment on ITMX
    - Jeff Bartlett around HAMS 23, BSC3, Optics lab working on dust monitors
    - Rick to EY for
    - Jonathon and Larry to LVEA to work on GC wireless
    - Kyle removing CFF blank from OMC tube
    - DAQ/Framebuilder restart,
    - Jeff shaking  ETMY
    - Rick turned off the lights and fans in the anteroom of the PSL at 4:00
    - Norna, Eric, and Mark B. went to both end stations to take pictures

H1 PSL (IOO, PSL)
richard.savage@LIGO.ORG - posted 15:57, Thursday 26 June 2014 (12497)
Marking position of PSL beam reflected from HAM1 window on Laser Area Enclosure wall
This morning, I first took the attached photo of the post-it note recording earlier markings of the reflected spot positions.

Then, I taped a new post-it note over the top of the previous one and marked the spots as found this morning (see second photo below).

Images attached to this report
LHO General
bubba.gateley@LIGO.ORG - posted 15:54, Thursday 26 June 2014 (12498)
Apollo crew
The welding on the p-cal pier at X end is complete.
H1 General
matthew.heintze@LIGO.ORG - posted 13:35, Thursday 26 June 2014 (12495)
Particle counts HAM2 Wed 25th

Particle counts for HAM2 in cleanroom prior to work beginning (Counts taken using new Met One HHPC-6 particle counter)

0.3 um.....20 counts

0.5um....20 counts

0.7um.....10 counts

Remainder...zero counts

 

Particle counts in chamber before start work

0.3 um.....50 counts

0.5 um.....10 counts

Remainder....zero counts

 

No particle counts taken during or at end of work due to not having a particle counter

X1 SUS
mark.barton@LIGO.ORG - posted 12:53, Thursday 26 June 2014 - last comment - 12:36, Tuesday 01 July 2014(12494)
QUAD08 TFs

Joe and Andres finished adjusting QUAD08 so I started a round of TFs on both chains at 12:52. Order is undamped M0, R0, then damped M0 and R0.

Comments related to this report
arnaud.pele@LIGO.ORG - 16:53, Thursday 26 June 2014 (12502)

First set of measurement failed. Started them again at 23:52:23 UTC.

arnaud.pele@LIGO.ORG - 15:46, Friday 27 June 2014 (12520)

Transfer functions ran yesterday in the staging building are showing clear sources of rubbing especially in the pitch/length/yaw degrees of freedom for the reaction chain. Main chain has large unexpected cross couplings in pitch.

arnaud.pele@LIGO.ORG - 12:36, Tuesday 01 July 2014 (12570)

Andres and Jeff realized the cover was on during that measurement, which is why results were bad. We started them again Friday overnight.

H1 CDS
david.barker@LIGO.ORG - posted 11:11, Thursday 26 June 2014 (12493)
install of RCG tag 2.8.4, building and testing IOP models against this

Rolf release RCG tag 2.8.4 today. I have installed it on h1build, and compiled/installed all SWWD IOP models against this. I also compiled h1lsc model but did not install, just to check the compile.

I am testing the new SWWD models and MEDM on the EY SUS and SEI systems at the moment.

All release pointers have been set to RCG-2.8.4, please keep this in mind if you build FE models.

H1 SYS
jameson.rollins@LIGO.ORG - posted 10:04, Thursday 26 June 2014 (12491)
new features in cdsutils

I forgot to mention yesterday that the new cdsutils install includes a couple of new userful features:

New library:

New cdsutils commands:

  • dv: simple time series plotting, like a very basic dataviewer with a much better plot window/gui:

cdsutils dv H1:SUS-ITMX_M0_OSEMINF_{F1,F2,F3,LF,RT,SD}_INMON

  • audio: rockifo replacement.  play an NDS channel over the local computer speakers:

cdsutils audio H1:LSC-DARM_OUT

I removed the rockifo script, which has now been deprecated.

0$ cdsutils help
usage: cdsutils <cmd> <args>

Advanced LIGO Control Room Utilites

Available commands:

  read         read EPICS channel value
  write        write EPICS channel value
  switch       switch buttons in standard LIGO filter module
  avg          average one or more NDS channels for a specified amount of seconds
  servo        servos channel with a simple integrator (pole at zero)
  trigservo    servos channel with a simple integrator (pole at zero)
  audio        Play channel as audio stream.
  dv           Plot time series of channels from NDS.

  version      print version info and exit
  help         this help

Add '-h' after individual commands for command help.
0$ 
H1 CDS (DAQ)
david.barker@LIGO.ORG - posted 10:03, Thursday 26 June 2014 (12492)
CDS model and DAQ restart report, Wednesday 25th June 2014

no restarts reported.

H1 AOS (INS, SEI, SUS)
jason.oberling@LIGO.ORG - posted 08:55, Thursday 26 June 2014 (12490)
ITMx Alignment
IAS: J. Oberling
SEI: H. Radkins
 
Measured the position and yaw of ITMx yesterday after the HEPI actuator install.  Position/yaw errors are as follows:
  • Longitudinal: -0.3 mm (South)
    • Tolerance: ±3 mm
  • Lateral: +0.2 mm (West)
    • Tolerance: ±1.0 mm
  • Vertical: 0.0 mm
    • Tolerance: ±1.0 mm
  • Yaw: 7 µrad CCW
    • Target: 0 µrad
    • Tolerance: ±50 µrad

As Hugh mentioned in his alog here we used the HEPI RZ position loop to align the yaw to it's current value.  Today we will begin work on ITMx pitch and CPx pitch/yaw.

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