Displaying reports 67221-67240 of 83004.Go to page Start 3358 3359 3360 3361 3362 3363 3364 3365 3366 End
Reports until 19:27, Thursday 22 January 2015
H1 AOS (AOS)
darkhan.tuyenbayev@LIGO.ORG - posted 19:27, Thursday 22 January 2015 (16221)
EndY Pcal beam power measurements
Sudarshan K, Rick S, Darkhan T.

Pcal beam power measurements were taken at EndY.

Measurements inside TX module:
OFS PD outputs 3720 counts, 2.25 V.
TX PD outputs 1592 counts.
Laser power: 2 W.
Servo loop is open.
Heat sink is not installed.

Power measurements before any optics (after the laser shutter) at different voltages:
1.05 W   at 3.0 V
1.35 W      3.5 V
1.60 W      4.0 V
1.86 W      4.5 V
2.07 W      5.0 V

Power measurements, laser power set at 5 V:
OFS PD: 9.06 V    14850 cts.     2.72 mW
TX PD:  4.2  V     6930 cts.    10.1  mW


Power meter is used with OD1.

NE01A-B + NE02A-B attenuators attached to OFS PD.

Power reading inside of TX module between two lenses (combined power of two beams going to ETMY): 1.69 W.


Measurements of two beams at the TX module:
Inner beam: 844 mW
Outer beam: 824 mW


Measurements of two beams at the RX module:
Inner beam: 827 mW
Outer beam: 810 mW
Both beams combined: 1.63 W
RX PD mon (both beams combined) output: 10.3 V


Pictures of Pcal spots on ETMY (f/22, 30 sec):
LHOetm_0250.jpeg - inner beam only on ETMY (outer beam is blocked)
LHOetm_0251.jpeg - outer beam only on ETMY
LHOetm_0252.jpeg - both beams


We left Pcal laser ON, beams on ETMY.
Images attached to this report
H1 General
eleanor.king@LIGO.ORG - posted 18:06, Thursday 22 January 2015 (16216)
ETMx GiGe camera aligned in IR

This morning I focused the ETMx GiGe camera (CAM 25) in IR.  I had to zoom in closer to the optic to get the pitcure into focus.  For reference, attached are photos of ETMX before zooming in and after zooming in (which is the current camera configuration).

Images attached to this report
Non-image files attached to this report
H1 SEI
hugh.radkins@LIGO.ORG - posted 17:59, Thursday 22 January 2015 - last comment - 18:12, Thursday 22 January 2015(16217)
SDF Control for LHO HPI Platforms

Using Dave's extract from the Guardian logs since the RCG 2.9 restart to generate an exclude file.  I've loaded SDF Tables for all LHO HPIs (except HAM1.)  Attached is a snap of the donot monitor file; this is Dave's file with filter module core names removed (Guardian uses ezca which doesn't have to use a complete name to manipulate a switch) and the HPI MASTER_SWITCH added (the SEI Manager toggles this switch, not the HPI Guardian.)  Also in the image is the difference table from the SDF before the donot_monitor list was added.  After updating the Table, the diff list went to zero channels.

All HAM HPI currently have no diffs--let's keep it that way.  The BSC HPIs have a few diffs (1-4,) these are a few ISC settings and sensor correction gains that need to be corrected by updating the safe.snap value.  Fab tool!

Thanks to Dave & Jonathan.

Images attached to this report
Comments related to this report
hugh.radkins@LIGO.ORG - 18:12, Thursday 22 January 2015 (16219)

All HEPI safe.snaps and exclude lists are committed to the svn from /opt/rtcds/userapps/release/hpi/h1/burtfiles

H1 SEI
jeffrey.kissel@LIGO.ORG - posted 17:35, Thursday 22 January 2015 - last comment - 08:46, Friday 23 January 2015(16214)
HAMs 2-5's 0.5 - 10 [Hz] Performance Drastically Improved with Better Isolation Loops
J. Warner, A. Pele, J. Kissel

Jim has improved the isolation loop design for the HAM2, HAM3, HAM4, and HAM5 ISIs by increasing the frequency / aggression of the Level 3 isolation filters (along with tweaking the UGF and high frequency rolloff such that the aggressive boost remained stable). As such, we have a great deal more feedback gain in the 0.5 to 5 [Hz] region of all DOFs for these HAMs -- the region where the noise performance is typically loop gain limited -- and therefore the performance improvement has scaled linearly with the gain increase. See "IsoFilterComp" attachments.

We didn't have noise budget yet to prove it, but Jim had recognized that HAM6, the most recently designed chamber had much better performance, and much high boost frequency. 

Arnaud has gathered performance data comparing platform displacement before and after the change, which confirms the goodness locally. See "PerformanceComp" attachements. We didn't grab / compare the rotational degrees of freedom but these have also improved. Now that Arnaud has installed properly-matched, sensor correction, gains (see LHO aLOG 16208), we should expect a little bit better translational performance, so we'll compare again and make sure we capture rotational DOFs. Further, we plan to use calibrated DRMI cavity control signals to ensure that what we've done locally is good for the IFO.

The parameter files for these new current designs can be found here:
HAM2/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM2_Lv3_HR_2014_10_23.m
HAM2/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM2_Lv3_HR_2014_10_22.m
HAM3/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM3_Lv3_IMC_HP_2013_01_16.m
HAM3/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM3_Lv3_IMC_HP_2013_01_16.m
HAM4/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM4_Lv3_HR_2014_09_22.m
HAM4/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM4_Lv3_HR_2014_09_16.m
HAM5/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM5_Lv3_2014_09_25.m
HAM5/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM5_Lv3_2014_09_25.m
Non-image files attached to this report
Comments related to this report
jeffrey.kissel@LIGO.ORG - 08:46, Friday 23 January 2015 (16228)
The start of the path to the filter parameter files indicated is 
/ligo/svncommon/SeiSVN/seismic/HAM-ISI/H1/HAM(#)/Scripts/Control_Scripts/Version_3/(filenames)
H1 General
travis.sadecki@LIGO.ORG - posted 16:19, Thursday 22 January 2015 (16213)
OPS Shift Summary

8:38 Rick to EX to pick up PCal equipment

9:30 Benton PUD on site

9:32 Fil to LVEA working on PEM mics

9:38 Karen to MY

9:40 Rick done at EX, heading to EY for PCal work

9:57 Jeff and Andres to LVEA for cleanup

10:09 Jeff and Andres out of LVEA

10:45 Benton PUD off site

11:00 Pepsi truck on site

11:10 Karen done at MY

12:23 Fil back to LVEA PEM work

14:00 Fil kicked out of LVEA by mean commissioners :(

H1 ISC (ISC)
evan.hall@LIGO.ORG - posted 15:20, Thursday 22 January 2015 - last comment - 13:40, Saturday 24 January 2015(16211)
LSC-Y_TR photodiode gain adjustment

I have turned up the preamp gain on the LSC-Y_TR photodiode (a PDA100A on ISCTEY) from 0 dB to 20 dB. The BS immediately before this PD is a BS1-1064-50-2037-45P.

The LSC-TR filter banks have been adjusted as follows:

Comments related to this report
evan.hall@LIGO.ORG - 13:40, Saturday 24 January 2015 (16248)

Somehow these values were overwritten with the old values around 2015-01-24 03:37:00 UTC. I've restored the new values.

H1 CDS
david.barker@LIGO.ORG - posted 15:07, Thursday 22 January 2015 - last comment - 23:17, Thursday 22 January 2015(16210)
Editing the SITEMAP.adl medm screen

Reminder, if you wish to edit the site map, please do so in the /opt/rtcds/userapps/release/cds/h1/medm directory.

Please do not do it in the /opt/rtcds/lho/h1/medm directory as this breaks the symbolic link and the change does not get committed to the SVN version control repository.

Comments related to this report
rana.adhikari@LIGO.ORG - 23:17, Thursday 22 January 2015 (16223)ISC

Over the last couple days I have made a couple of housekeeping updates to the IFO_ALIGN screen:

  • Made the default step size for all of the big optics to be 0.1. This is to prevent people from accidentally breaking the lock by moving one of these optics by a couple microradians with a couple of fast clicks. Its still fine to have a default step size of 1 microrad on the little RC optics since the beam is little there and the cavities are not so sensitive to their motions.
  • Put an "&" into the argument string for the Save Aligned and Save Misaligned button for the COC. We can also do this for the RM, IM, and OM optics once they get assimilated by the Guardian.
  • checked into SVN
H1 CDS (CDS)
keith.thorne@LIGO.ORG - posted 14:48, Thursday 22 January 2015 (16209)
IOP model ADC hold times

I repeated the study I did on the L1 ADC hold times  ( aLOG entry 16455 ) using date from H1.  It is running the tagged RCG 2.9 and has higher thresholds (MAX_ADC_WAIT_CARD_0 of 20, MAX_ADC_WAIT_CARD_S of 3).  

Here, I record values from the IOP model proc file (i.e. cat /proc/h1ioplsc0/status on h1lsc0)

ADC Hold times on IOP models (in mu-sec)
FE Max Hold ADC#0 Max Max Delta
h1lsc0 22 21 1
h1susb123 23 21 2
h1sush34 25 21 2
h1sush56 24 21 2

Again, in most cases ADC#0 Max + Max Delta = Max Hold.  It does appear that better limits of 23 and 5 for MAX_ADC_WAIT_CARD_0, MAX_ADC_WAIT_CARD_S (from L1 data) would work here.  The current CDS bugzilla issue is Bug 791

H1 SEI
arnaud.pele@LIGO.ORG - posted 14:26, Thursday 22 January 2015 - last comment - 15:51, Friday 23 January 2015(16208)
matching sts gains with platform motion for sensor correction

Last week, sts correction gains were measured and calculated on HAM4/5/6 to improve the CPS sensor correction. We measured them today for the remaning chambers.

For the BSC chambers, we locked the platforms to the ground by increasing the blends to 750mHz (cf alog) and turned off the sensor correction. We measured the ratio between the T240 (stage 1) and the STS (ground) signal (should be 1 with the platform moving with the ground). The same measurement was also carried out between STS and L4C for hepi, since IPS sensor correction is used for the Z DOF.

All the measurements using the corner station STS B as input to the sensor correction (ITMX, BS, ITMY) show a factor of two mismatch with the hepi and platform sensors in the X DOF only. There is certainly a calibration error with the STS B seismometer. I checked the calibration filter in the input filter banks and it looks correct (10.17 nm/s /cts). We should investigate more. The other chambers and dofs need a relatively small correction. 

The ISI gains (T240/STS for BSCs and GS13/STS for HAMs) are 

  X Y Z
HAM2 1.036 0.995 0.877
HAM3 0.976 0.958 0.812
ETMX (T240 for gnd sensor) 1.114 1.106 1.105
ETMY 0.985 0.974 0.995
ITMX 1.964 0.976 0.993
ITMY 1.982 0.984 0.993
BS 1.99 0.986 0.994

The BSC - HEPI gains (L4C/STS) are

  X Y Z
ETMX 1.110 1.107 1.091
ETMY 0.998 0.991 0.969
ITMX 2.167 1.063 0.972
ITMY 2.011 1.006 0.963
BS 2.09 1.055 0.924

Attached are examples of the transfer functions for ITMY 

To calculate the gains I wrote a script for the bscs in a similar fashion as Sebastien's : it is called BSC_gain_matching_calculation(IFO,Chamber,start_time,duration) located under /ligo/svncommon/SeiSVN/seismic/BSC-ISI/Common/Misc. The results above were obtained using the following parameters : 

start_time=tconvert('01/22/2015 15:35') ;
duration = 45*60 ;

Non-image files attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 18:05, Thursday 22 January 2015 (16215)

The sensor correction matching gains were changed to their new values for the BS ITMX and ITMY in the X dof. The pdf attached are comparing the X platform motion before/after the change, showing improvement (x~2) in the 300mHz 700mHz band.

I confirmed that the factor of two mismatch described in the log above comes from the STS B, looking at the comparison of the three ground seismometers (X dof) of the corner station, see attached screenshot.

Images attached to this comment
Non-image files attached to this comment
jim.warner@LIGO.ORG - 09:51, Friday 23 January 2015 (16229)

It looks like the problem is in the B STS or associated cabling. I took spectra of the raw ADC signal and the B seismometer shows half as much X signal (ADC channel 26 on attached plot) as the other 2 STS's. Arnaud and I went out to check the cabling at the rack, everything is tight there. We are doing measurements with the ITM's right now, so we didn't go out to check the cable on the pod.

Images attached to this comment
jim.warner@LIGO.ORG - 15:51, Friday 23 January 2015 (16237)

I looked though the trends and science channels, and it looks like the auto center on the B STS was pushed at 8:30 am local on Dec 23rd, 2014 and the X channel didn't recover properly. On the first attached trend you can see that before the alleged button push (alleged because there are no logs, I'm just guessing, second trend shows what looks like an auto-centering sequence though) the X channel showed more signal, then after less signal. Y channel looks roughly the same before and after. Attached spectra (3rd png) shows overall spectra is very different, solid red is before, dashed green is after.

Images attached to this comment
H1 SEI
hugh.radkins@LIGO.ORG - posted 14:17, Thursday 22 January 2015 - last comment - 15:23, Thursday 22 January 2015(16207)
All LHO HEPIs restoring all DOFs via Guardian. safe.snaps updated for Bias Target and committed to svn

Yesterday I dif the ETMs.  Today I did all the remainder.  All came back under guardian first time.

Comments related to this report
hugh.radkins@LIGO.ORG - 15:23, Thursday 22 January 2015 (16212)

Have added and committed HPI guardians to the h1 area so as to not by default edit the common file.  All other guardian changes from this also committed.

H1 CDS (SYS)
david.barker@LIGO.ORG - posted 13:51, Thursday 22 January 2015 (16206)
Lists of channels changed by guardian for the month of January 2015

To help with setting up SDF files, I have created lists of channels modified by the H1 guardian nodes for the month of January up to this time. We expect this to be a fairly exhaustive list as it covers the RCG2.9 upgrade on the 13th Jan when all front ends were restarted.

There is a text file per guardian node in the directory /opt/rtcds/lho/h1/data/guardian_channels/guardian_control_channels/2015jan

Attached is a list of the number of channels controlled per guardian node. As expected it is quite small. For example: SUS_ETMX has 1,717 set point channels of which 53 were changed (3%); ISI ETMX (ST1 and ST2) have 1,952 set point channels of which 124 were changed (6%).

Non-image files attached to this report
H1 SUS
daniel.sigg@LIGO.ORG - posted 11:38, Thursday 22 January 2015 (16205)
TMSY ISC angular inputs were off

Found that the angular control inputs of TMSY were off since Tuesday (restore issue?)

Moved the gain of the TMSY ISC P/Y input modules into a CAL filter. This makes Y the same as X.

The safe.snap was updated.

H1 ISC
daniel.sigg@LIGO.ORG - posted 11:14, Thursday 22 January 2015 (16204)
Delay in Engaging the Tidal Servo

New tidal code was loaded for both arms which delays the tidal servo by 5 seconds after the arm has locked.

Also fixed the long standing problem that some of the values in the PLL/PHD autolockers were not restored automatically after a PLC restart.

H1 SEI
jeffrey.kissel@LIGO.ORG - posted 10:17, Thursday 22 January 2015 (16203)
DeRosa Filters Added to BSC ISI's 'NXT' Blend Filter Banks
J. Kissel

While the BSC-ISIs were in an odd configuration anyway for obtaining sensor correction gain matching data (see LHO aLOG 16200), I took the opportunity to clean up, clean out, and fill in the ST1 and ST2 BLND_NXT filter banks with the correct, high performance, Ryan DeRosa, blend filters. Recall that the CUR (for "current") and NXT (for "next") filter banks should have the same exact filters in all filter modules, such that they can be used for the automatically switching between blend filters on the fly (see T1200126). 

All NXT banks for ETMX, ETMY, ITMX, ITMY, and BS now have identical filters as what's in place in the CUR banks (HAMs are already up-to-snuff). 

Further, I've cleared out all "Unknown", gain-of-one, filters which seemed to have been sporadically peppered in the higher numbered FMs. 

Finally, when transitioning back from the "Start" filters to Ryan's filters (by hand), I've left the RZ filter banks with all FMs OFF, because we don't run the RZ isolation loops.

For the record, I performed the copy and paste by-hand in foton, saved filters via foton, and reloaded all coefficients simultaneously using the GDS_TP screen. Further, I've committed all affected filter files (and any other I found different from the SVN -- the HAM's .txt files because of Jim's recent improvement of the isolation loops [aLOG pending], and HAM4 and 6's .fir files, because Jim installed them Dec 2nd [aLOG "pending"]). 

Also -- I did not have enough time to *test* whether the newly implemented filters allow for smooth switching between the low-noise filter set and any others, but my suspicion is that it *still* won't work, given that the blend switching software cannot handle filter sets that occupy two FMs, which is the case for the RX and RY filters on ST1.

H1 SEI
jeffrey.kissel@LIGO.ORG - posted 08:13, Thursday 22 January 2015 - last comment - 09:07, Thursday 22 January 2015(16200)
H1 ISIs Set to '750mHz' and 'Start' Blend Filters, with ISI and HPI Sensor Correction OFF for Gain Matching
J. Kissel, A. Pele

In order to gather measurement data for GND to ST1 sensor correction, I've switched all chamber's ISIs except for HAMs 4-6 to a high-frequency blend. For the HAMs this means the "750mHz" blends, and for the BSCs the "Start" filters (see attached) and turned both ISI X&Y and HEPI Z sensor correction OFF. Yesterday, worried that there still might be residual garbage from initial install in these filter banks, we've confirmed that all chambers involved have the same filters as attached.

The chambers have been set up in this fashion since 
1105975887 Jan 22 2015 15:31:11 UTC
(We blends switched by done by 15:05 UTC and 15:22 UTC in the HAMs and BSCs, respectively, but I forgot to turn OFF the sensor correction until Arnaud reminded).
Non-image files attached to this report
Comments related to this report
jeffrey.kissel@LIGO.ORG - 09:07, Thursday 22 January 2015 (16202)
BSCs and HAMs have been restored as of:
1105980152    Jan 22 2015 16:42:16 UTC    XARM Restored
1105981034    Jan 22 2015 16:56:58 UTC    YARM / BS Restored
1105981219    Jan 22 2015 17:00:03 UTC    HAM23 restored
H1 CDS (DAQ)
david.barker@LIGO.ORG - posted 08:11, Thursday 22 January 2015 (16201)
CDS model and DAQ restart report, Wednesday 21st January 2015

model restarts logged for Wed 21/Jan/2015
2015_01_21 01:47 h1fw0
2015_01_21 13:36 h1fw1
2015_01_21 15:05 h1fw1
2015_01_21 15:29 h1fw1
2015_01_21 15:43 h1fw0
2015_01_21 17:26 h1fw1
2015_01_21 17:40 h1fw0
2015_01_21 18:43 h1fw0
2015_01_21 19:08 h1fw0
2015_01_21 19:40 h1fw0
2015_01_21 20:42 h1fw0
2015_01_21 23:03 h1fw1
2015_01_21 23:29 h1fw1
2015_01_21 23:45 h1fw0

All unexpected restarts. Inexplicably both frame writers have become unstable, starting about 24 hours after Tuesday's solaris reboots. I may try another solaris reboot today.

I've attached a trend of the h1fw0 and h1fw1 restarts for this month (h1dc0 restart is included to show intentional DAQ restarts). The instability starts 1/13 when we upgraded to RCG2.9.

Conlog frequently changing channels list attached.

Images attached to this report
Non-image files attached to this report
Displaying reports 67221-67240 of 83004.Go to page Start 3358 3359 3360 3361 3362 3363 3364 3365 3366 End