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ID Date Author Type Category Subject   88   Fri Nov 9 09:37:55 2007 steve Update PSL head temp hiccup Just an other PSL-126MOPA_HTEMP hiccup. The water chiller is at 20.00C Attachment 1: headtempup.jpg   113   Fri Nov 16 18:46:49 2007 steve Bureaucracy PSL 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 !   114   Mon Nov 19 14:19:25 2007 steve Omnistructure PEM jackhammer The construction personal successfully jackhemmered a fence around the "Drever's parking slot" There is no parking space available close by Attachment 1: jackhammer.jpg Attachment 2: jackhammer2.jpg   115   Mon Nov 19 14:32:10 2007 steve Bureaucracy SAFETY grad 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.   122   Mon Nov 26 10:17:31 2007 steve Omnistructure SUS etmy sus damping restored 20 days plot is showing etmy loosing damping 4 times. I zoomed in with each event. Three of them could of been triggered by garbage loading just outside. However attachment 2 plot demonstrating that small earthquake or seismic event did not tripped etmy damping. The fourth event was preceded by a 4-5 hrs of continous rise of the rms motion at C1:SUS-ETMY_LLPD_VAR Attachment 1: etmyrms20d.jpg Attachment 2: etmyrmseq.jpg   129   Wed Nov 28 08:47:29 2007 steve Omnistructure VAC rga is out of order The rga is not working since Nov 10 The controller is broken. pd65-m-d23 Attachment 1: pd65d23.jpg   200   Wed Dec 19 11:31:01 2007 steve Omnistructure PEM aircond filter maintenance Jeff is working on all air condiontion units of the 40m lab This we do every six months. Attachment 1: acfilters6m.jpg   203   Wed Dec 19 16:40:12 2007 steve Update SAFETY laser safety glasses measured I measured the coarse transission at 1064nm of the 40m safety glasses today. 12 pieces of UVEX # LOTG-YAG/CO2 light green, all plastic construction, ADSORBANT 3 pieces of 6KG5, Scott colored filter glass type, individual prescription glasses: alan, bob, ben, jay and steve 7 pieces of dual waveleght glasses These glasses showed 0.00mW transmission out of 170mW Crysta Laser 1064   220   Thu Jan 3 08:53:55 2008 steve Update SUS etmy vs etmx Rana have corrected sus gain damping setting of ETMY 8 days ago gain settings: pos, pit, yaw & sd etmx: 4,2,2,& -16 etmy: 4,2,2,& 50 Attachment 1: sus.jpg   221   Thu Jan 3 09:12:59 2008 steve Update PSL MZ servo Here is MZ trend for one year and 40 days. Now days it runs out of range on the low side. This is the weakest link in the psl today. Attachment 1: mz1y.jpg Attachment 2: mz40d.jpg   222   Thu Jan 3 09:55:11 2008 steve Update SUS etmy sus damping restored ETMY watch dog was lost at midnight Attachment 1: etmy12h.jpg   225   Fri Jan 4 08:42:03 2008 steve Update SUS etmy trips again ETMY sus damping tripped at 6am this morning It was reset. We should put an accelerometer to the south end to see the garbage dumping effect. Attachment 1: etmy20m.jpg Attachment 2: etmy120s.jpg Attachment 3: etmysenV.jpg   226   Mon Jan 7 09:01:39 2008 steve Update SUS BS sus damping restored The BS sus damping was lost at 8am Sunday morning. Attachment 1: bssdl.jpg   232   Thu Jan 10 10:38:02 2008 steve Update SUS etmy damping restored The IST building onstruction has really started yesterday and continuing today with big heavy ground breaking machinary. The MC is holding lock and the suspentions are hanging on. ETMY does not like this. SUS-MC2_LLPD_VAR monitor is a good indicator of seismic activity on this 12 days plot Attachment 1: etmysus.jpg Attachment 2: sustrend16d.jpg   233   Thu Jan 10 12:08:23 2008 steve Update SUS why did the BS move? Attachment 1: bshopped.jpg   235   Thu Jan 10 15:04:04 2008 steve Update SUS illuminator light effect on BS position The bs chamber illuminator light was turned on this morning and left on. Earlier on Rana noticed that the bs moved. I follwed up to see what happened. I turned off oplev servo and tried to recenter on oplev pd by adjusting pitch and yaw biases. It did not move. I looked at suspention and realized that the illuminator was still on. I turned it off and to my amazement the the AP spot started flashing Attachment 1: bssusilum.jpg   237   Mon Jan 14 14:41:09 2008 steve Update SUS etmy sus damping restored & mz relocked Tree days trend of MZ HV drift is typical these days. So as the etmy sus inability to hold damping for longer then 2-3 days. Attachment 1: etmysus&mzhvtrend.jpg   254   Wed Jan 23 09:27:55 2008 steve Update   etmy sus damping restored Seismis event trips etmy Attachment 1: etmysus.jpg   255   Wed Jan 23 11:41:06 2008 steve Update PEM sulfur smell in 40m Led - acid car batteries were overcharged in the machine shop next door and sulfuric acid smell is coming over to the ifo room. Entry room 103 is specially bad.   258   Thu Jan 24 11:52:56 2008 steve Update PEM the mud is cleaned up & MOPA shutter is opened Safety glasses are required again! I have just opened the mopa shutter. One janitor came to help with muddy floor. Rack 1x1 toward ITMX chamber and the south wall of these area were completely covered by mud. I wiped the floor of bottom of the rack with towels. The cables were lifted and still should be wiped. The bottom of LSC rack got less water, only on the west side. We are ready to bring up the computers. Thanks to ALL with the clean up, including Alan Rice who was really helpful.   264   Fri Jan 25 09:22:21 2008 steve Update PEM burned toast award goes to DYM for collaborating with the enemy. In order to minimize the number of ants visiting our lab we have to take out side the lab all food left over and organic waste. If you are eating here do not expect someone else to clean up after you. Thanks for your cooperation.   299   Wed Feb 6 09:17:31 2008 steve Update PEM IST building construction continoues The bulldosers at work Attachment 1: seismic8d.jpg Attachment 2: seisioo.jpg   308   Mon Feb 11 14:24:19 2008 steve Update PEM more earthquakes ITMX and ITMY sus damping restored after Baja earthquake 5.1 mag at 10:29 this morning. The ground preparation for The ITS building is almost finished. Activity is winding down, however the Baja California_ Mexico earthquake zone "Guadala Victoria" started acting up on Friday. http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/special/California_Nevada_eqs.php Attachment 1: eqfeb11.jpg   322   Tue Feb 19 10:14:13 2008 steve Update VAC rga logging needs help The rga head and controller are running fine, but the data logging is not.   325   Wed Feb 20 11:34:17 2008 steve Update PSL laser head temp is up MOPA head temp is running at 20.3C now Nomally it is at 18.5C Attachment 1: htempup.jpg   326   Wed Feb 20 16:24:37 2008 steve Update PSL the laser is recovering slowly Head temp is still 20.5C and decreasing slowly. Power output 2.9W NPRO power 22 mW is increasing as head is cooling down Attachment 1: laserecoverring.jpg   327   Thu Feb 21 09:56:26 2008 steve Update PSL the laser is back The laser and the psl recovered. The water chiller temp is 19.98C and head temp 18.4C Power 3.2W PMC_T 3.1 c1iovme was restarted and the mc is locking now Attachment 1: laserisback.jpg   335   Fri Feb 22 14:45:06 2008 steve Update MOPA laser power levels At the beginning of this 1000 days plot shows the laser that was running at 22C head temp and it was send to LLO The laser from LHO PA#102 with NPRO#206 were installed at Nov. 29, 2005 @ 49,943 hrs Now,almost 20,000 hrs later we have 50% less PSL-126MOPA_AMPMON power Attachment 1: lpower1000d.jpg   351   Mon Mar 3 09:25:33 2008 steve Update VAC rga scan logging is working now Quote: Quote: The rga head and controller are running fine, but the data logging is not. It should run tonight at 1:25 AM. To get the cron job to work properly on op340m, I had to make wrapper sh script which defines the perl library before calling the actual RGAlogger script. Thanks to Rob, it is working ! The baked, calibrated rga head model# M206M, s/n #c128035 was reinstalled at the 40m ifo on Feb. 8, 2008 Faraday mode dwell time was increased from 2 to 16 sec Rga head temp at top silver gaskit 45.2 C The noise floor is at 1E-12 Torr There is more detail in logbook VMI-14 p 107 pd65-m-d119 Attachment 1: rgalogworks.jpg Attachment 2: cc1.jpg   352   Mon Mar 3 13:58:10 2008 steve Update Computers RFM Network are down The CODAQ_RFNETWORK are down, except C1SUSVME & AWG   365   Fri Mar 7 19:04:39 2008 steve Omnistructure PSL laser pointer Green laser pointer was found in my desk. I blamed Rana for not returning it to me after a conference talk. It is surprisingly bright still. I will bring sweets for Wednesday meeting.   385   Thu Mar 20 15:28:20 2008 steve Update VAC tp2 's drypump replaced The fore pump of tp2 was replaced at fore line pressure 998m Torr   388   Fri Mar 21 09:02:03 2008 steve Update VAC tp 2 failed Small turbo #2 is the forepump of the maglev. It failed last night, shut down the maglev and interlock closed V1 Ifo pressure is 20 mTorr now. The Yarm was still locked at 8am this morning. The PSL beam to MC was blocked just before the output periscope. The psl mechanial shutter did not work from epic screen.   409   Wed Apr 2 15:03:51 2008 steve Update General reflectivity of black glass The reflectivity of black glass, shade 12 was supplied by Donald O'Shea of Emerald Glass Inc., Westlake, OH 44145 The reflectivity of this glass was measured as shown Old 1064 nm Crysta Laser with poor beam quality was the source. Attachment 1: bg12refl.pdf Attachment 2: bg12refsetup.pdf   417   Mon Apr 7 18:58:49 2008 steve Update General reflectivity of SS304 The reflectivity of stainless steel 304 super polished # 8 was measured the same way as elog entry 409 The reflectivity: 74 +- 1 % from incident angle 10 to 80 degrees Attachment 1: ss304s8refl.pdf   418   Tue Apr 8 09:08:54 2008 steve Configuration PEM weather station disconnected We can not leave cables in the walkways and go on vacation. I disconnected the weather station from the DAQ Every Tuesday is janitor day in the 40m. We have to give him free space for doing a good job. Burned toast award goes to Andrey. Attachment 1: toast.jpg   423   Thu Apr 17 15:00:59 2008 steve Update VAC vac controller computer to be replaced Now that Rosalba is up and running someone should step forward to volunteer for this job. Old desk top at the Vacuum Rack should be replaced by a functional less old computer so the vacuum controller can count on an emergency situation. It's only has to be able to run medm The existing one is dying.   443   Thu Apr 24 15:57:53 2008 steve Configuration SAFETY Safety at AP-ISCT I measured the output power of the psl after the mechanical shutter. It was 1.1 W with Ophir power meter, than unlocked the MC and measured the power at the MC-REFL Beam Dump at the AP-ISCT 0.9 W Power on MC-REFL photodiode 92 mW High power metal beam shields were installed around the beam path of MC-REFL between AP-Viewport and MC-REFL Beam Dump. Placed HIGH POWER LASER BEAM PATH warning signs on table frame and top covers. Last week I placed a small monitor on the top of the OOC that monitors the resonant spot of MC2. Please keep an eye on this monitor when working on the AP-ISCT AP table should NOT be left uncovered. One experienced laser operator has to be present if the top is removed and IR-viewer scan required. We need your full cooperation to keep this lab safe. Attachment 1: P1020197.JPG Attachment 2: mcrefl3.JPG   450   Fri Apr 25 15:44:21 2008 steve Update PSL scattering measurments In pursuit of a low back scattering, high power beam dump we looked at materials such: polished copper, polished aluminum, diamond cut aluminum, variety of polished & heat treated stainless steel and shades of black glasses. Black glass is ideal at low power. Superpolished SS 304 #8 is the only material that measures close to bg We are still looking for a conductive low back scattering material that would be ideal for a good high power beam trap. Black glass-shade 12, ss304 superpolished #8 and white paper-B98-24lbs back scattering were compared at 1064 nm Atm 1: data plot numbers from front panel of SR830 display, sensitivity: 1x1 mV for bg and ss 1x1 V for wp Atm 2: drawing of measurement set up Atm 3: SR830 lock.amp settings Atm 4: view from steering mirror Atm 5: view from black glass trap Atm 6: white paper Attachment 1: scatmeas20080425.xls Attachment 2: scattring_set_up_20080425.ppt Attachment 3: sr830settings.pdf Attachment 4: viewfmirror.pdf Attachment 5: viewfbgtrap.pdf Attachment 6: wpnmount.pdf   462   Thu May 1 08:31:51 2008 steve Update SUS earthquake trips etmy & mc1 Earthquake at Lake Isabel magnitude 4.4 at 1am today shakes the 40m ETMY and MC1 watchdogs tripped. Sus damping restored.   465   Mon May 5 15:53:14 2008 steve Update VAC drypump replaced & readbacks are out The small turbo pump of the annulus system is tp3 It's drypump was replaced at 1.4 Torr after 8 months of operation. The rebuilding cost of this SH100 drypump is getting ridiculously high $1349. I'll look for a replacement. Joseph rebooted c1vac2 card on Apr 24 entry#441 This restarted the readbacks of the turbos and ion pumps for a while. That was nice. The readbacks are not working again   472   Fri May 9 08:40:24 2008 steve Update SUS ETMY sus damping restored ETMY lost damping at 19:10 last night. There was no seismic event than. Sus damping was restored this morning.   474   Tue May 13 10:15:52 2008 steve Update SUS restored damping of BS & PRM I think our janitor was cleaning too heavy handedly. The BS and PRM sus damping were lost. They were restored.   475   Tue May 13 10:38:28 2008 steve Update Computers rfm network is down The RFM network went down yesterday around 5pm Only c1susvme1 is alive but it's timing is off. Andrey is bringing the network up. Andrey wants to make an addition first that our situation is very much similar to that described by Rana in his elog entry # 353 (March 03). All of the rectangular boxes are red, except for SUS1-c1susvme1 and AWG (only these two rectangles are green).   478   Thu May 15 10:40:21 2008 steve HowTo General Lisa Goggin, PhD Lisa Goggin successfully defended her thesis on May, 13 2008 "A Search For Gravitational Waves from Perturbed Black Hole Ringdowns in Ligo Data" She started out as a surf student in the 40m. Congratulation! Attachment 1: lisa.JPG   487   Mon May 19 11:49:57 2008 steve Update SUS etmy oplev laser replaced The 9 years old Uniphase HeNe was replaced by a new JDSU 1103P Power output ~3.5 mW, reflected light back on qpd ~140 microW, 12,800 counts Andrey will get the ~2.5 mm od spot on the qpd smaller by replacing the f1000 lens   488   Tue May 20 09:28:42 2008 steve Bureaucracy SAFETY safety 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 steve Bureaucracy SAFETY early 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   502   Wed May 28 14:19:47 2008 steve Update PSL kaleidoscope of psl atm 1: scattering psl table optics from the top of the output periscope f4, 60s @MOPA 3 W atm 2: scattering psl table optics from the top of the output periscope f4, 20s atm 3: competing GigE cameras on the north end of psl table atm 4: yellow "soft" washer to be replaced on psl output periscope atm 5: ETMY-ISCT in disarray Attachment 1: pslscat.png Attachment 2: pslscat2.png Attachment 3: 2GigEs.png Attachment 4: perwash.png Attachment 5: etmydisarray.png   504   Thu May 29 16:32:09 2008 steve Update SUS etmy oplev is back I relayed the optics for ETMY-oplev as shown in pictures below. The reflected beam goes directly to the qpd Attachment 1: P1020417.png Attachment 2: P1020420.png

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