40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Thu Feb 23 15:48:43 2017, johannes, Update, Computers, c1psl un-bootable scope_PDA520_ITM_aligned_ETM_misaligned.pngscope_PDA520_ITM_slightly_misaligned.pngpmc_trans_last10days.png
    Reply  Thu Feb 23 18:52:53 2017, rana, Update, Computers, c1psl un-bootable 
       Reply  Thu Feb 23 19:44:48 2017, johannes, Update, Computers, c1psl un-bootable slow_startup_logs.tar.gz
          Reply  Fri Feb 24 20:38:01 2017, johannes, Update, Computers, c1psl boot-stall culprit identified 
          Reply  Tue Feb 28 01:28:52 2017, johannes, Update, Computers, c1psl un-bootable 
             Reply  Wed Mar 8 18:18:51 2017, johannes, Update, Computer Scripts / Programs, loss script 
                Reply  Thu Mar 9 22:28:11 2017, johannes, Update, Computer Scripts / Programs, loss script 
                   Reply  Fri Mar 10 11:37:25 2017, gautam, Update, Computer Scripts / Programs, loss script 
                      Reply  Fri Mar 10 19:48:56 2017, johannes, Update, Computer Scripts / Programs, loss script 
                         Reply  Sat Mar 11 20:11:58 2017, johannes, Update, Computer Scripts / Programs, loss script 
Message ID: 12850     Entry time: Thu Feb 23 18:52:53 2017     In reply to: 12849     Reply to this: 12851
Author: rana 
Type: Update 
Category: Computers 
Subject: c1psl un-bootable 

The fringes seen on the oscope are mostly likely due to the interference from multiple light beams. If there are laser beams hitting mirrors which are moving, the resultant interference signal could be modulated at several Hertz, if, for example, one of the mirrors had its local damping disabled.

ELOG V3.1.3-