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Message ID: 310     Entry time: Thu Feb 16 10:19:33 2017
Author: Gabriele 
Type: General 
Category: Measurements 
Subject: S1600453 S1600456 S1600461 S1600490 

2017-02-16

  • 10:17am in chamber
    • S1600453 in CR1
    • S1600456 in CR2
    • S1600461 in CR3
    • S1600490 in CR4
  • Notes:
    • added ND03 on path to CR1 and CR3, since QPD were saturating
    • there is something wrong with CR1, the spectrum is very noisy. I checked that there is no clipping of the beam. I also tried to move the spot on the disk, without change. Maybe the disk is touching?
  • 10:18am, roughing pump on, clamps on
  • 10:21am, turbo pump on
  • Excitations: (NOTE: bay 1 noise spectrum is very bad. The autocetering of bay 3 failed, so the QPD was not centered for most of the time)
    • Quiet time before excitation: 1171326574
      Excitation (broad band) at 1171326609 (60 s)
      Quiet time after excitation: 1171326674

    • Quiet time before excitation: 1171328504
      Excitation (broad band) at 1171328539 (60 s)
      Quiet time after excitation: 1171328604

    • Quiet time before excitation: 1171330434
      Excitation (broad band) at 1171330469 (60 s)
      Quiet time after excitation: 1171330534

    • Quiet time before excitation: 1171332364
      Excitation (broad band) at 1171332399 (60 s)
      Quiet time after excitation: 1171332465

    • Quiet time before excitation: 1171334295
      Excitation (broad band) at 1171334330 (60 s)
      Quiet time after excitation: 1171334395

    • Quiet time before excitation: 1171336225
      Excitation (broad band) at 1171336260 (60 s)
      Quiet time after excitation: 1171336325

    • Quiet time before excitation: 1171338155
      Excitation (broad band) at 1171338191 (60 s)
      Quiet time after excitation: 1171338256

    • Quiet time before excitation: 1171340086
      Excitation (broad band) at 1171340121 (60 s)
      Quiet time after excitation: 1171340186

2017-02-17

  • 8:43am gate valve closed, pump stopped, venting slowly
  • the measurements carried out last night didn't look very good, mostly because it seems that the picomotor of QPD3 got crazy and was shaking too much the bench
  • 12:19pm, balanced again, roughing pump on. Added ND03 and ND04 to lasers to avoid QPD saturations
  • 12:49pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1171425425
      Excitation (broad band) at 1171425460 (60 s)
      Quiet time after excitation: 1171425525

    • Quiet time before excitation: 1171427355
      Excitation (broad band) at 1171427390 (60 s)
      Quiet time after excitation: 1171427455

    • Quiet time before excitation: 1171429285
      Excitation (broad band) at 1171429320 (60 s)
      Quiet time after excitation: 1171429385

    • Quiet time before excitation: 1171431215
      Excitation (broad band) at 1171431250 (60 s)
      Quiet time after excitation: 1171431315

    • Quiet time before excitation: 1171433145
      Excitation (broad band) at 1171433180 (60 s)
      Quiet time after excitation: 1171433245

    • Quiet time before excitation: 1171435075
      Excitation (broad band) at 1171435110 (60 s)
      Quiet time after excitation: 1171435176

    • Quiet time before excitation: 1171437006
      Excitation (broad band) at 1171437041 (60 s)
      Quiet time after excitation: 1171437106

    • Quiet time before excitation: 1171438936
      Excitation (broad band) at 1171438971 (60 s)
      Quiet time after excitation: 1171439036

2017-02-18

  • 9:34am, gate valve closed, pumps stopped, venting
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