40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 337 of 339  Not logged in ELOG logo
ID Date Author Typedown Category Subject
  16886   Thu Jun 2 20:05:37 2022 yutaConfigurationPSLIMC input power recovered to 1W, some alignment works

[Paco, Yuta]

We have increased the output power from the PSL table to 951 mW (it was 96.7 mW).
IMC was recovered including WFS, and both arms are flashing nicely in IR.
We tweaked the alignment of GRX and GRY injection to align them with IR, but it was hard.
Right now IR beams are not centered on TMs. We should center them first.

What we did:
Power increase and IMC recovery
 - Replaced a beam splitter which splits the beam into IMC REFL RF PD path and WFS path from R=98% to R=10% one. Reflection goes to RF PD.
 - Put a R=98% beam splitter back into WFS path.
 - We also tried to put a window in front of IMC REFL camera to recover the arrangement in 40m wiki, but the beam reflected from the window was too weak for us to align. So, we decided not to place a window in front of the camera.
 - Attached photos are the IMC REFL path before and after the work.
 - Measured the PSL output power as Koji did in elog 40m/16672. It was measured to be 96.7+/- 0.5 mW.
 - Rotated the HWP using the Universal Motion Controller (it was not possible for us to do it from the MEDM screen). The position was changed from 73.99 deg to 36.99 deg. Output power was measured to be 951 +/- 1 mW
 - IMC locked without any other changes.
 - Changed C1:IOO-WFS_TRIGGER_THRESH_ON to 5000 (was 500). IMC WFS also worked.
 - After running MC WFS relief script, WFS DC offsets and RF offsets are adjusted following the steps in elog 40m/16835. Below are the results.

C1:IOO-WFS1_SEG1_DC.AOFF => -0.0008882080010759334
C1:IOO-WFS1_SEG2_DC.AOFF => -0.0006527877490346629
C1:IOO-WFS1_SEG3_DC.AOFF => -0.0005847311617496113
C1:IOO-WFS1_SEG4_DC.AOFF => -0.0010395992663688955
C1:IOO-WFS2_SEG1_DC.AOFF => -0.0025944841559976334
C1:IOO-WFS2_SEG2_DC.AOFF => -0.003191715502180159
C1:IOO-WFS2_SEG3_DC.AOFF => -0.0036688060499727726
C1:IOO-WFS2_SEG4_DC.AOFF => -0.004011172490815322

IOO-WFS1_I1         :  +1977.7 ->    +2250 (Significant change)
IOO-WFS1_I2         :  +3785.8 ->  +3973.2
IOO-WFS1_I3         :  +2014.2 ->  +2277.7 (Significant change)
IOO-WFS1_I4         :  -208.83 ->  +430.96 (Significant change)
IOO-WFS1_Q1         :  +2379.5 ->  +1517.4 (Significant change)
IOO-WFS1_Q2         :  +2260.4 ->  +2172.6
IOO-WFS1_Q3         :  +588.86 ->  +978.98 (Significant change)
IOO-WFS1_Q4         :  +1654.8 ->  +195.38 (Significant change)
IOO-WFS2_I1         :  -1619.9 ->  -534.25 (Significant change)
IOO-WFS2_I2         :  +1610.4 ->  +1619.8
IOO-WFS2_I3         :  +1919.6 ->  +2179.8 (Significant change)
IOO-WFS2_I4         :    +1557 ->  +1426.6
IOO-WFS2_Q1         :   -62.58 ->  +345.56 (Significant change)
IOO-WFS2_Q2         :  +777.01 ->  +805.41
IOO-WFS2_Q3         :  -6183.6 ->  -5365.8 (Significant change)
IOO-WFS2_Q4         :  +4457.2 ->  +4397.

IFO Alignment
 - Aligned both arms using IR. Both arm flashes at the following, which is consistent with the power increase.
 - With this, we tried to tweak GRX and GRY injection. The following is after the work. We could increase GTRX to 0.204 when the Xarm is aligned to green. This suggests that GRX injection is not aligned nicely yet. But the beams are also not centered on TMs. We should center them first.
 C1:ALS-TRX_OUT_DQ ~0.13
 C1:ALS-TRY_OUT_DQ ~0.07
 - GTRX and GTRY cameras are adjusted to have nicer images. In GRX path, the second and last lens before the PD and CCD was pulled ~ 1 cm behind its original position and both beams realigned. Then, on GRY path, the beam was re-centered on the first and only lens, the whole assembly pushed forward by ~ 2 cm and the beams re-centered.

 - Center the IR beam on TMs (first by our eyeballs; better to use A2L after arm locking is recovered and coils are balanced)
 - Tweak GRX and GRY injection (restore GRY PZTs?)
 - Install ETMXT camera (if it is easy)
 - Lock Xarm and Yarm (C1:LSC-TRX/Y_OUT needs to be fixed for triggering. Can we use other PDs for triggering?)
 - MICH locking (REFL and AS PDs might need to be re-aligned; they are not receiving much light)
 - RTS model for BHD needs to be updated

  16887   Fri Jun 3 12:13:58 2022 PacoConfigurationCDSFix RFM channels

[Paco, Yuta]

We tried fixing the issue of LSC_TRY and LSC_TRX channels not working. We first did some investigation, and just like previously reported by Chris, narrowed down the issue to the RFM channels coming from c1iscex/c1iscey.

First attempt : FAIL

In our first attempt, we

  1. Tripped ETMX/ETMY watchdogs, ssh to c1iscex/c1iscey and restart the rtcds models.
  2. Since the last step didn't fix things, we decided to do the same thing on c1lsc, c1sus, c1ioo.
  3. After hard rebooting c1ioo and c1lsc (because they died during the stopping of rtcds models), and not experiencing any timing issues (nice), we still don't fix the issue.

Second attempt: Success

A second attempt just followed Koji's previous fix explained here. Basic difference with our first attempt was a hard reboot of c1iscex/c1iscey in addition to the rtcds model restarting. RFM channels were then clear of errors and we recovered our IR transmission channels in the LSC model.

  16893   Mon Jun 6 16:09:23 2022 ranaConfigurationDetCharSummary Pages: seis BLRMS

I updated the config file c1pem.ini in /users/public_html/detcharsummary/ConfigFiles, and commited it so I hope it works, but I did not have git push permissions. Does anyone know what is the idea here? Should we do our own personal git clone and modify that way or shoudl we do it with the control account.

Wiki needs to clear out all the outdated information on this workflow.

The changes are to make the y-scales useful. Currently, all of the past seis BLRMS plots are not so useful because the scales have not been set based on the actual signal levels. Let's see if this works, and we  can re-evaluate after a few weeks.

  16924   Thu Jun 16 18:23:15 2022 PacoConfigurationBHDRecovering LO beam in BHD DCPDs

[Paco, Yuta]

We recovered the LO beam on the BHD port. To do this, we first tried reverting to a previously "good" alignment but couldn't see LO beam hit the sensor. Then we checked the ITMY table and couldn't see LO beam either, even though the AS beam was coming out fine. The misalignment is likely due to recent changes in both injection alignment on TT1, TT2, PR2, PR3, as well as ITMX, ITMY. We remembered that LO path is quite constrained in the YAW direction, so we started a random search by steering LO1 YAW around by ~ 1000 counts in the negative direction at which point we saw the beam come out of the ITMY chamber yes

We proceeded to walk the LO1-LO2 in PIT mostly to try and offload the huge alignment offset from LO2 to LO1 but this resulted in the LO beam disappearing or become dimmer (from some clipping somewhere). This is WiP and we shall continue this alignment offload task at least tomorrow, but if we can't offload significantly we will have to move forward with this alignment. Attachment #1 shows the end result of today's alignment.

  16932   Tue Jun 21 14:17:50 2022 yutaConfigurationBHDBHD DCPDs re-routed to c1sus2

After discussing with Anchal, we decided to route BHD related PD signals directly to ADC of c1sus2, which handles our new suspensions including LO1, LO2, AS1, AS4, so that we can control them directly.
BHD related PD signals will be sent to c1lsc for DARM control.

Re-cabling was done, and now they are online at C1:X07-MADC1_EPICS_CH16 (DC PD A) and CH17 (DC PD B) with 15ft DB9 cable.
Here, DC PD A is the transmission of BHD BS for AS beam, and DC PD B is the reflection of BHD BS for AS beam (see attached photo).

  17018   Tue Jul 19 16:00:34 2022 yutaConfigurationBHDFast channels for BHD DCPDs now available in c1lsc but not in c1hpc

[Paco, Anchal-remote-support, Yuta]

We added fast channels to BHD DC PDs.
C1:LSC-DCPD_(A|B)_IN1 are now available, but C1:HPC-DCPD_(A|B)_IN1 still gives us zero.

c1hpc situation -> not good
 - We can see the slow signal at C1:X07-MADC1_EPICS_CH16 (DC PD A) and CH17 (DC PD B)
 - C1:HPC-DCPD_(A|B)_IN1 is there, but zero.
 - We have modified c1hpc model to add DCPD_(A|B) filters in front of the input matrix (see Attachment #1).
 - After modifying the model, we run
ssh c1sus2
rtcds make c1hpc
rtcds install c1hpc
ssh fb1
sudo systemctl restart daqd_*

 - After this, we got 0x2000 error. So, we ran the following. This removed 0x2000 error, but DCPD signals are still zero. They are also not available in C1HPC-MONITOR_ADC1.adl screen (see Attachment #3).
ssh c1sus2
rtcds restart c1hpc

c1lsc situation -> good
 - We could see the slow signal at C1:X04-MADC1_EPICS_CH4 (DC PD A) and CH5 (DC PD B), and also C1:LSC-DCPD_(A|B)_NORM after making C1:LSC-DCPD_(A|B)_POW_NORM=1. The ADC channel and DCPD channel are exactly the same.
 - After confirming the above, we modified the c1lsc model to add DCPD_(A|B) filters in front of the input matrix (see Attachment #2).
 - After modifying the model, we run
ssh c1lsc
rtcds make c1lsc
rtcds install c1lsc
ssh fb1
sudo systemctl restart daqd_*

 - After this, we also got 0x2000 error. We also noticed that, for example, C1:X04-MADC0_EPICS_CH31 and C1:LSC-ASDC_INMON are different, which used to be the same (ASDC_INMON was largely attenuated).
 - In the end, we run the following to remove 0x2000 error, but it crashed c1lsc, as well as c1sus, c1ioo.
ssh c1lsc
rtcds restart c1lsc

 - So, we did rebootC1LSC.sh. This made c1lsc, c1ioo and c1sus as green as before, except for RFM issue in TRX/TRY, like we saw in June. We followed the steps in 40m/16887 to hard reboot c1iscex/c1iscey and ran rebootC1LSC.sh again. This made C1CDS_FE_STATUS.adl screen as green as before (see Attachment #3).

 - Fast channels C1:LSC-DCPD_(A|B)_IN1 are now available. They are also available in C1LSC-MONITOR_ADC1.adl screen (see Attachment #3).

  17025   Thu Jul 21 21:50:47 2022 TegaConfigurationBHDc1sus2 IPC update

IPC issue still unresolved.

Updated shared memory tag so that 'SUS' -> 'SU2' in c1hpc, c1bac and c1su2. Removed obsolete 'HPC/BAC-SUS' references from IPC file, C1.ipc. Restarted the FE models but the c1sus2 machine froze, so I did a manual reboot. This brought down the vertex machines---which I restarted using /opt/rtcds/caltech/c1/scripts/cds/rebootC1LSC.sh---and the end machines which I restarted manually. Everything but the BHD optics now have their previous values. So need to burtrestore these.

# IPC file:

# Model file locations:

# Log files:

SUS overview medm screen :

  • Reduced the entire screen width
  • Revert to old screen style watchdog layout
  17026   Fri Jul 22 15:05:26 2022 TegaConfigurationBHDc1sus2 shared memory and ADC fix

[Tega, Yuta]

We were able to fix the shared memory issue by updating the receiver model name from ''SUS' to 'SU2' and the ADC zero issue by including both ADC0 and ADC1 in the c1hpc and c1bac models as well as removing the grounding of the unused ADC channels (including chn#16 and chn#17 which are actually used in c1hpc) in c1su2. We also used shared memory to move the DCPD_A/B error signals (after signal conditioning and mixing A/B; now named A_ERR and B_ERR) from c1hpc to c1bac.
C1:HPC-DCPD_A_IN1 and C1:HPC-DCPD_B_IN1 are now availableangel (they are essentially the same as C1:LSC-DCPD_A_IN1 and C1:LSC-DCPD_B_IN1, except for they are ADC-ed with different ADC; see elog 40m/16954 and Attachment #1).
Dolphin IPC error in seding signal from c1hpc to c1lsc still remains.crying

  17028   Fri Jul 22 17:46:10 2022 yutaConfigurationBHDc1sus2 watchdog update and DCPD ERR channels

[Tega, Yuta]

We have added C1:HPC-DCPD_A_ERR and C1:HPC-DCPD_B_ERR testpoints, which can be used as A+B, A-B etc.
Restarting c1hpc crashed c1sus2, and also made c1lsc/ioo/sus models red.
We run /opt/rtcds/caltech/c1/Git/40m/scripts/cds/restartAllModels.sh to restart all the machines. It worked perfectly without manually pressing power buttons! Wow!heart

We have also edited /opt/rtcds/caltech/c1/medm/c1su2/C1SU2_WATCHDOGS.adl so that it will use new /opt/rtcds/caltech/c1/Git/40m/scripts/SUS/medm/resetFromWatchdogTrip.sh instead of old /opt/rtcds/caltech/c1/scripts/SUS/damprestore.py.

  17033   Mon Jul 25 17:58:10 2022 TegaConfigurationBHDc1sus2 IPC dolphin issue update

From the 40m wiki, I was able to use the instructions here to map out what to do to get the IPC issue resolved. Here is a summary of my findings.

I updated the /etc/dis/dishost.conf file on the frame builder machine to include the c1sus2 machine which runs the sender model, c1hpc, see below. After this, the file becomes available on c1sus2 machine, see attachment 1, and the c1sus2 node shows up in the dxadmin GUI, see attachment 2. However, the c1sus2 machine was not active. I noticed that the log file for the dis_nodemgr service, see attachment 3, which is responsible for setting things up, indicated that the dis_irm service may not be up, so I checked and confirmed that this was indeed the case, see attachment 4. I tried restarting this service but was unsuccessful. I restarted the machine but this did not help either. I have reached out to Jonathan Hanks for assistance.

  17034   Mon Jul 25 18:09:41 2022 TegaConfigurationBHDBHD Homodyne Phase control MEDM screen

[Paco, Tega, Yuta]

Today, we made a custom MEDM screen for the BHD Homodyne Phase Control, which is basically an overview of the c1hpc model. See Attachments 1 & 2 for details.

  17052   Mon Aug 1 18:42:39 2022 TegaConfigurationBHDc1sus2 IPC dolphin issue update

[Yuta, Tega]

We decided to give the dolphin debugging another go. Firstly, we noticed that c1sus2 was no longer recogonising the dolphin card, which can be checked using

lspci | grep Stargen

or looking at the status light on the dolphin card of c1sus2, which was orange for both ports A and B.

We decided to do a hard reboot of c1sus2 and turned off the DAQ chassis for a few minutes, then restared c1sus2. This solved the card recognition problem as well as the 'dis_irm' driver loading issue (I think the driver does not get loaded if the system does not recognise a valid card, as I also saw the missing dis_irm driver module on c1testand). 

Next, we confirmed the status of all dolphin cards on fb1, using

controls@fb1$ /opt/DIS/sbin/dxadmin

It looks like the dolphin card on c1sus2 has now been configured and is availabe to all other nodes. We then restated the all FE machines and models to see if we are in the clear. Unfortunately, we are not so lucky since the problem persisted.

Looking at the output of 'dmesg', we could only identity two notable difference between the operational dolphin cards on c1sus/c1ioo/c1lsc and c1sus2, namely: the card number being equal to zero and the memory addresses which are also zero, see image below.

Anyways, at least we can now eliminate driver issues and would move on to debugging the models next.

  17054   Tue Aug 2 17:25:18 2022 TegaConfigurationBHDc1sus2 dolphin IPC issue solved

[Yuta, Tega, Chris]

We did it!laugh

Following Chris's suggestion, we added "pciRfm=1" to the CDS parameter block in c1x07.mdl - the IOP model for c1sus2. Then restarted the FE machines and this solved the dolphin IPC problem on c1sus2. We no longer see the RT Netstat error for 'C1:HPC-LSC_DCPD_A' and 'C1:HPC-LSC_DCPD_B' on the LSC IPC status page, see attachement 1.

Attachment 2 shows the module dependencies before and after the change was made, which confirms that the IOP model was not using the dolphin driver before the change.

We encountered a burt restore problem with missing snapfiles from yesterday when we tried restoring the EPICS values after restarting the FE machines. Koji helped us debug the problem, but the summary is that restarting the FE models somehow fixed the issue.

Log files:
Request File list:
Snap files location:
Autoburt crontab on megatron:
19 * * * * /opt/rtcds/caltech/c1/scripts/autoburt/autoburt.cron > /opt/rtcds/caltech/c1/burt/burtcron.log 2>&1
  50   Thu Nov 1 19:53:02 2007 Andrey RodionovBureaucracyPhotosTobin's picture
  51   Thu Nov 1 19:53:34 2007 Andrey RodionovBureaucracyPhotosRobert's photo
  52   Thu Nov 1 19:54:22 2007 Andrey RodionovBureaucracyPhotosRana's photo
  53   Thu Nov 1 19:55:03 2007 Andrey RodionovBureaucracyPhotosAndrey's photo
  54   Thu Nov 1 19:55:59 2007 Andrey RodionovBureaucracyPhotosAndrey, Tobin, Robert - photo
  55   Thu Nov 1 19:58:07 2007 Andrey RodionovBureaucracyPhotosSteve and Tobin's picture
  57   Fri Nov 2 08:59:30 2007 steveBureaucracySAFETYthe laser is ON
The psl laser is back on !
  75   Wed Nov 7 02:14:08 2007 AndreyBureaucracyIOOMore information about MC2 ringdown
As Tobin wrote two hours ago, we (Andrey, Tobin, Robert) made a series of ringdown measurements for MC2
in the spirit of the measurement described by Rana -> see
entry from Mon Oct 29 23:47:29 2007, rana, Other, IOO, MC Ringdowns.

I attach here some pictures that we saw on the screen of the scope, but I need to admit that I am not experienced enough to present a nice fit to these data, although I attach fits that I am able to do today.

I definitely learned a lot of new Matlab functions from Tobin - thanks to him!, but I need to learn two more things:

Firstly, I do not know how to delete "flat" region (regions before the ringdown starts) in Matlab ->
I needed to delete the entries for times before the ringdown ("negative times") by hand in the text-file, which is extremely non-elegant method;

Secondly, I tried to approximate the ringdown curve by a function ydata=a*exp(b*xdata) but I am not exactly sure if this equation of the fitting curve is a good fit or if a better equation can be used.

It seems, in this situation it is better for me to ask more experienced "comrades" on November 7th.

P.S. It seems I really like the type of message "Bureaucracy" - I put it for every message. As Alain noted, maybe that is because some things are very bureacratized in the former USSR / Russia. By the way, when I was young, November 7th was one of two most important holidays in the USSR - I liked that holiday because I really liked military parades on the red square. I attach a couple of pictures. November 7 is the anniversary of the Revolution of 1917.
  113   Fri Nov 16 18:46:49 2007 steveBureaucracyPSL MOPA was turned off & on
The "Mohana" boys scouts and their parents visited the 40m lab today.
The laser was turned off for their safety.
It is back on !
  115   Mon Nov 19 14:32:10 2007 steveBureaucracySAFETYgrad student safety training
John Miller and Alberto Stochino has received the 40m safety bible.
They still have to read the laser operation manual and sign off on it.
  130   Wed Nov 28 12:43:53 2007 AndreyBureaucracy Here was the PDF-file of my presentation

I was making a report with powerpoint presentation during that Wednesday's 40-m meeting.

Here was the pdf-file, but LATER IN THE EVENING I CREATED A WIKI-40M-page describing the algorithm, and now the pdf-file is ON THAT WIKI-40M PAGE.

NOTE ADDED AFTER THE PRESENTATION: I double checked, I am indeed taking the root-mean-square of a difference, as we discussed during my talk.

My slide #17 "Calculation of differential length" was wrong, but now I corrected it.
  135   Wed Nov 28 19:02:41 2007 AndreyBureaucracyWIKI-40M UpdateNew WIKI-40M page describing Matlab Suspension Modeling

I created the WIKI-40m page with some details about my today's talk on the 40-m lab meeting.

The address is:


(or you can go to the main page, http://lhocds.ligo-wa.caltech.edu:8000/40m/ , and click on the link "Modeling of suspensions").

The WIKI-40m page describes my transfer functions and contains the pdf-file of my presentation.
  224   Thu Jan 3 12:38:49 2008 robBureaucracyTMISore throat


I did not feel anything wrong yesterday, but unfortunately I have a very much sore throat today. I need to drink warm milk with honey and rinse my throat often today. So far I do not have other illness symptomes (no fever), so I hope that this small disease will not last for a long time, but I feel that it is better for me to cure my sore throat today at home (and probably it is safer for others in 40-m).

I took yesterday the book "Digital Signal Processing", so I have it for reading at home.

Hope to see you tomorrow.

I've added a new category--TMI--for entries along these lines.
  262   Thu Jan 24 22:52:18 2008 AndreyBureaucracyGeneralAnts around a dirty glass (David - please read!)

Dear coleagues,

there are rains outside these days, so ants tend to go inside our premises.

David was drinking some beverage from a glass earlier today (at 2PM) and left a dirty glass near the computer.

There are dozens, if not hundreds, of ants inside of that glass now.

Of course, I am washing this glass.

  279   Mon Jan 28 12:42:48 2008 DmassBureaucracyTMICoffee
There is tea in the coffee carafe @ the 40m. It is sitting as though it were fresh coffee. There is also nothing on the post it.
  339   Fri Feb 22 21:19:38 2008 AndreyBureaucracyComputer Scripts / ProgramsMDV library does not work at "LINUX 2"

While working on Thursday evening with Matlab scripts "dttfft2" and "get_data", I noticed that mDV library does not work at computer "LINUX 2" (the third computer in the control-room if you enter it from the restroom). There are multiple error messages if we try to run "hello_world", "dttfft2" or "get_data". In order to take data from accelerometers, I changed the computer - I was working from "LINUX 3" computer, the most right computer in the control room, but for the future someone should resolve the issue at "LINUX 2". I am not experienced enough to revive the correct work of mDV directory at "LINUX 2".

  343   Thu Feb 28 12:31:33 2008 robBureaucracyComputer Scripts / ProgramsMDV library does not work at "LINUX 2"


While working on Thursday evening with Matlab scripts "dttfft2" and "get_data", I noticed that mDV library does not work at computer "LINUX 2" (the third computer in the control-room if you enter it from the restroom). There are multiple error messages if we try to run "hello_world", "dttfft2" or "get_data". In order to take data from accelerometers, I changed the computer - I was working from "LINUX 3" computer, the most right computer in the control room, but for the future someone should resolve the issue at "LINUX 2". I am not experienced enough to revive the correct work of mDV directory at "LINUX 2".


This turned out to be due to /frames not being mounted on linux2, as a result of a reboot. The issue is discussed in entry 270. I remounted the /frames, and added a line to mdv_config.m to check whether the frames are mounted.
  382   Fri Mar 14 16:56:03 2008 DmassBureaucracyComputersNew 40m control machine.
I priced out a new control machine from Dell and had Steve buy it.

GigE cards (jumbo packet capable) will be coming seperately.

Quad core (2+GHz)
4 Gigs @ 800MHz RAM
24" LCD
low end video card (Nvidia 8300 - analog + digital output for dual head config)

No floppy drive on this one (yet?)
  488   Tue May 20 09:28:42 2008 steveBureaucracySAFETYsafety traning for 40m
Tara Chalernsongsak, new gradstudent for K. Libbrecht was introduced to the basics of the 40m operations.
  491   Thu May 22 11:21:45 2008 steveBureaucracySAFETYearly surf sudent
Caltech under grad Eric Mintun received the 40m safety training.
Now he has to read and sign SOP of laser and ifo.
He'll be working with GigE cameras with Joe
  505   Thu May 29 16:49:49 2008 steveBureaucracyPhotosYoichi has arrived
Yoichi had his first 40m meeting. We welcomed him and Tobin, who is visiting, by sugar napoleons that
Bob made.
  511   Mon Jun 2 12:20:35 2008 josephbBureaucracyCamerasBeam scan has moved
The beamscan has been moved from the Rana lab back over to the 40m, to be used to calibrate the Prosilica cameras.
  523   Fri Jun 6 15:56:00 2008 steveBureaucracySAFETYYoichi received safety training
Yoichi Aso received 40m specific safety training.
  552   Mon Jun 23 15:22:04 2008 ranaBureaucracySAFETYLaser Safety Walkthrough today
  708   Mon Jul 21 15:52:22 2008 steveBureaucracySAFETYfire alarms test
The fire alarm test and evacuation drill was successfully completed at 13:45 Wednesday, July 16, 2008

Everybody was on time for the 40m meeting.
  840   Fri Aug 15 14:12:31 2008 steveBureaucracySAFETYsafety glasses required
The MOPA shutter is opened,
the PSL enclosure is switched to bypass mode,
manual block removed from PMC,

the PSL output is still blocked and the mechanical shutter is still closed.

Pumpdown is at 300 Torr continuing

Laser safety glasses are required!
  942   Thu Sep 11 14:27:53 2008 steveBureaucracySAFETYsafety training
Peter Kalmus received 40m specific safety training last week.
  1068   Wed Oct 22 16:22:53 2008 steveBureaucracySAFETYCaryn received safety training
Caryn Polatchi has received 40m safety training on Monday, Oct 20
  1071   Thu Oct 23 11:26:25 2008 steveBureaucracyVACoptosigma forks for vacuum
Nine short forks from OptoSigma were cleaned, baked and measured by Bob T.
They passed the LIGO vac compatiblity test as Rana predicted.
Remember: Thorlab and Newfocus forks failed this qualification process.
  1123   Fri Nov 7 16:05:55 2008 steveBureaucracySAFETYinsect killer sprayed at kitchen area !

Bob and I cleaned out the sink area and sprayed
Spectracide's BUG STOP insect killer solution on the shelfs and sink
table top area.

NO eating or coffee drinking till Monday

This is an effort to stop the ants coming.
  1227   Wed Jan 14 10:59:06 2009 steveBureaucracyVACrga waiting to be "connected"
We have no RGA data since old Dycor passed away in the middle of Oct, 2008
New SRS-RGA200 was installed on the vac envelope on Nov 14, 2008
It is waiting to be software connected to the 40m logging
  1243   Thu Jan 22 08:34:10 2009 steveBureaucracySAFETYsafety training
Kakeru received 40m safety training yesterday.

He has no authorization to work alone in the high power beam path yet.
  1273   Thu Feb 5 09:12:29 2009 steveBureaucracySAFETYsafety updates & fire alarm test

The fire alarm test was completed at 13:30 yesterday.


I updated the 40M Emergency Calling List by replacing Rob by Yoichy. The calling order: Vass,  Aso and Taylor.

Rana and Yoichy were added to the "Registered PSL Operator List"  and posted it in the lab. (not in the document, that should be up dated)

We are getting ready for the annual safety audit. It will be held next week  at 14:00 Friday, Feb 13, 2009

Please participate in the preparation by correcting it or just  tell me.


Rod Luna is organizing the pick up of the following old equipment:

HP laser jet  5000n, 3 of 19" 10 base-T network ports and  4 small hubs,

2 Sun monitors, 1 Viewsonic monitor, 7 keypads and

Hitachi scopes 2 of V-355, 2 of V-422, 1 of V-202 and 1 of V-6165



  1288   Tue Feb 10 10:48:48 2009 steveBureaucracySAFETYsafety glasses scanned
All 40m safety glasses are absorbent.
They were scanned by 180 mW  2mm spot size  of 1064 nm beam and  their  transmissions were measured
They showed no degradation.
UVEX 's  LOTG-YAG/CO2 glasses (fits over personal glasses) 11 pieces,
Glendale-XC by Bacou-Dalloz,  #1166218VLT68% , aerodynamic style, 7 pieces, (4 missing )
KG5- glasses , heavier- made out of glass, 3 pieces,
Thorlab's LG10, 1 piece
Old glasses by "Laser Glass" Nd-YAG, 2 pieces
Totaling 24
Atm.2  showing our muilty wavelength glasses of 1064 and 530 nm
Their transmittance for both wavelength were zero.
Note: if you have prescripton safety glasses I would like to scan it for you !



  1319   Wed Feb 18 15:31:38 2009 steveBureaucracySAFETYemergency back-up lights checked
All 13 exit and  emergency back-up lights and their batteries were checked.
Two of  the batteries were replaced.
  1332   Mon Feb 23 11:07:01 2009 steveBureaucracySAFETYKiwamu receives safety training

Osamu and Kiwamu received 40m safety training on Thursday, Feb 19, 2009

Kiwamu needs Osamu's close supervision at PSL enclosure and AP table
I hope they already read, understood and signed the laser SOP
  1700   Wed Jun 24 17:08:16 2009 steveBureaucracySAFETYsurf student safety

The 40m lab specific safety training is done. The participants were

Stephanie Erickson, Clara Bennett, Chris Zimmerman, Zach Commings, Michelle Stephen surfs and Drew Cappel  postock.

They have already went through the Caltech Safety Office laser and general safety training.

They still have to read, understand and sign the the SOP for the laser & lab

ELOG V3.1.3-