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ID Date Author Type Category Subject Text   13818   Sat May 5 20:30:21 2018 Koji Update PSL Modulation depth measurement for the 3IFO aLIGO EOM and aftermath Caution: Because of this work and my negligence, the RF output of the main Marconi for the IFO      13819   Sat May 5 22:32:07 2018 Koji Update PSL Modulation depth measurement for the 3IFO aLIGO EOM The 3IFO EOM was formerly tuned as the H2 EOM, so the resonant frequencies are different from the nominal aLIGO ones.      13842   Tue May 15 10:42:14 2018 Koji Update PSL Modulation depth measurement for the 3IFO aLIGO EOM and aftermath The marconi RF output was turned on and thus the RF generator condition was restored to the nominal state on Friday 11th.      13904   Thu May 31 17:47:12 2018 Koji Update Computers megatron process cleaning up megatron had full of zombie medm processes due to some of the screenshot scripts. I also found that apache2 is running      13905   Thu May 31 19:51:06 2018 Koji Update General WiFi router firmware update / rebooting The model of our martian wifi router (NETGEAR R6400) was found in the FBI router list to be rebooted asociated with the malware "VPNFilter"      13906   Thu May 31 22:59:27 2018 Koji Configuration Computers Shorewall on nodus [Jonathan Koji] Shorewall (http://shorewall.net/), a tool to configure iptables, was installed      13910   Fri Jun 1 21:47:23 2018 Koji Frogs General Touch screen manipulation of the IFO [Koji Gautam] We talked about touch interface of medm. We realized that android (and iOS)      13923   Wed Jun 6 17:22:23 2018 Koji Bureaucracy General Salvaged junk from yend While Keerthana and johannes were working at the end, I made a little cleaning at the yend. I salvaged large amount of hardware      13929   Thu Jun 7 20:21:15 2018 Koji Update Computer Scripts / Programs /cvs/cds Backup in danger Local backup on chiara seems not      13936   Sun Jun 10 03:46:38 2018 Koji Update IOO WFS HEAD SW confusion I was checking on the slow machine channels and found something I could not understand. On the IOO WFS HEAD screen, there      13944   Mon Jun 11 22:05:03 2018 Koji Update elog Comparison of the analytical and finesse values of TMS and FSR. > The percentage error which I found out =[(analytical value - finesse value)/analytical value]*100      13946   Mon Jun 11 22:46:24 2018 Koji Update IOO WFS HEAD SW confusion The unfortunate discovery today was that the attenuator switches on the IMC WFS heads are actually assigned to individual segments,      13975   Sat Jun 16 01:25:29 2018 Koji Update General PRC modescan attempt The PRC FSR is, of course, very close to twice of our f1 moudlation frequency (11MHz x 2 = 22MHz) .      13977   Sun Jun 17 14:20:35 2018 Koji Update General Chiara new USB 4TB DIsk I have connected a 4TB disk to chiara via a USB-SATA adapter. This disk has been recognized as /dev/sde. A GUID Partition Table (GPT),      13980   Mon Jun 18 12:07:03 2018 Koji Update General Chiara new USB 4TB DIsk The initial local backup with rsync was done. Now the new 4TB disk is (supposed to be) automatically      13983   Mon Jun 18 16:57:54 2018 Koji Update PSL Optics on AS table Of course, many (but no all) of the optics were custom-ordered back in ~2000.      13997   Thu Jun 21 14:57:59 2018 Koji Summary General A summary of the Tip-TIlt Mirror Holder design changes > 2. Weighted screw rod at the bottom for tilting the mirror-holder: Too long. The design of the holder      14011   Sat Jun 23 20:54:35 2018 Koji Update AUX First Coherent AUX Scan of PRC Using AM Sidebands How much was the osc freq of the marconi? And then how much was the resulting freq offset between PSL and AUX?      14015   Mon Jun 25 21:14:08 2018 Koji Summary General Re: A summary of the Tip-TIlt Mirror Holder design changes 3. - Do we need this much of extended range of the clamp location? How much range      14026   Wed Jun 27 19:37:16 2018 Koji Configuration Computers New NAT router installed [Larry, Koji] We replaced the NAT router between martian and the campus net. We have the administrative      14067   Fri Jul 13 17:13:45 2018 Koji Update General Vent objectives and prep Notice: I removed these 75Ohm video cables.      14069   Fri Jul 13 20:36:33 2018 Koji Summary General In vac/In air heater wiring I went to the Y-end and took more photos of the cable stand. These revealed that in-vac pin #13 is connected to the shield of the      14073   Mon Jul 16 15:07:19 2018 Koji Summary VAC Oven C vent [Steve Koji] - Attachment1: Removed the thermal cap. Checked the temperature of the oven.      14074   Mon Jul 16 18:12:00 2018 Koji Update VAC Adding a manual gate valve between TP1 and V1/VM2 [Steve Koji] We are in the process of adding a manual gate valve between TP1 (Osaka Maglev)      14077   Tue Jul 17 12:55:45 2018 Koji Summary General Started pumping [Steve, Koji, Gautam] We started pumping down at ~12:15PM.  6x    14080   Tue Jul 17 22:25:41 2018 Koji Summary VAC pumpdown 81 at 6 hrs 10:20PM Opened VM2 to pump down the RGA section with TP1 Stopped      14084   Wed Jul 18 23:43:50 2018 Koji Update General Vent 80 recovery Is the reflector too close to the beam and causing clipping?      14092   Fri Jul 20 22:51:28 2018 Koji Update IOO IMC WFS path alignment IMC WFS tuning  - IMC was aligned manually to have maximum output and also spot at the center      14093   Fri Jul 20 22:53:15 2018 Koji Update ASS Attempt to resurrect Yarm ASS [Koji Gautam] We managed to realize stable ASS configuration for Yarm. The transmission      14096   Sat Jul 21 14:03:19 2018 Koji Summary Thermal Compensation Y arm locking Ah. With MC2 feedback, we have about 3 times smaller "optical gain" for the ASS A2L. We have same dither, same actuator,      14112   Sun Jul 29 00:59:54 2018 Koji Update Electronics Characterization of Transimpedance Amplifier You have this measurement problem when the IF bandwidth is larger than the measurement frequency. I suspect the IF bandwidth is      14118   Mon Jul 30 18:19:03 2018 Koji Update SUS Trillium interface box was fixed and reinstalled The trillium interface box was removed from the rack. The      14121   Wed Aug 1 16:23:48 2018 Koji Summary Computers Transition of the main NFS disk on chiara [Gautam Koji] Taking the opportunity to shutdown c1ioo for adding a DAC card, we shutdown      14138   Mon Aug 6 09:42:10 2018 Koji Summary Computers Transition of the main NFS disk on chiara Follow up: - At least it was confirmed that the local backup (4TB->2TB) is regularly      14144   Tue Aug 7 23:06:30 2018 Koji Update PSL EOM measuement preparation I was preparing for the aLIGO EOM measuement to be carried out tomorrow afternoon. I did a few modifications to the      14145   Wed Aug 8 20:56:11 2018 Koji Update PSL EOM measuement preparation Rich and I worked on the EOM measurement. After the measurement, the setup was reverted to the nominal state      14175   Wed Aug 22 00:22:05 2018 Koji Summary Electronics Inspection of the possible dual backplane interfaces for Acromag DAQ [Johannes, Koji] We went around the LSC, PSL, IOO, and SUS racks to check how many dual backplane      14180   Thu Aug 23 16:05:24 2018 Koji Update IMC MC/PMC trouble I don't know what had been wrong, but I could lock the PMC as usual. The IMC got relocked by AutoLocker.      14197   Wed Sep 12 22:22:30 2018 Koji Update Computers SSL2.0, SSL3.0 disabled LIGO GC notified us that nodus had SSL2.0 and SSL3.0 enabled. This has been disabled now.      14208   Fri Sep 21 19:50:17 2018 Koji Update CDS Frequent time out Multiple realtime processes on c1sus are suffering from frequent time outs. It eventually knocks out c1sus (process).      14210   Sat Sep 22 00:21:07 2018 Koji Update CDS Frequent time out [Gautam, Koji] We had another crash of c1sus and Gautam did full power cycling of c1sus. It      14213   Sun Sep 23 20:15:35 2018 Koji Summary OMC Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror Link to OMC_Lab ELOG 308      14231   Fri Oct 5 00:46:17 2018 Koji Configuration ASC Y-end table upgrade ??? The SHG crystal has the conversion efficiency of ~2%W (i.e. if you have 1W input      14261   Thu Oct 18 00:27:37 2018 Koji Update SUS SUS PD Whitening board inspection [Gautam, Koji] As a part of the preparation for the replacement of c1susaux with Acromag,      14341   Tue Dec 11 13:42:44 2018 Koji Update OMC OMC channels FYI: D050368 Anti-Imaging Chassis https://dcc.ligo.org/LIGO-D050368      14353   Thu Dec 13 20:10:08 2018 Koji Update General Power Outage recovery [Gautam, Aaron, Koji] The PSL interlock system was fixed and now the 40m lab is laser hazard      14359   Fri Dec 14 14:25:36 2018 Koji Update CDS chiara backup fsck of chiara backup disk (UUID="90a5c98a-22fb-4685-9c17-77ed07a5e000") was done. But this required many files to be fixed. So the backed-up files are not      14360   Fri Dec 14 22:19:22 2018 Koji Update General Chiara new USB 4TB DIsk Edit: It was not 4TB      14361   Sat Dec 15 18:29:53 2018 Koji Update General Chiara new USB 4TB DIsk The local backup was done at 18:18 after 11h18m of running.      14367   Wed Dec 19 14:19:15 2018 Koji Summary VAC Plan for pumpoing down test We still need elaborated test procedure posted 12/29 Wed

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