TAMA300 Recombine2 Information

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1999/8

1999/8/2~22 Data Taking 1 (DT1)

• Subject
  To test the high speed data taking system. To establish the method of calibration
• Man power
  Tastumi(leader), Telada, Okutomi, Moriwaki, Ando, Nagano, Taniguchi, Arai
• DT1 Schedule
  
  

  2 (Mon)
  3 (Tue)	Preparative Experiment 21:00 ~
  4 (Wed)
  5 (Thu)
  6 (Fri)	Data Taking 1 19:00 ~
  7 (Sat)
  8 (Sun)
  9 (Mon)〜12 (Thu)	DT1 Analyses, get back to Recomb 2 experiment
  13 (Fri)	Briefing 13:00〜 making a decision to perform DT1 again
  14 (Sat)
  15 (Sun)
  16 (Mon)	Reserved for further experiment

  
  
• Preparative Experiment
  • Measurement of openloop transfer function and power spectrum of the signals that is possibly recorded during DT2.
    --> For configuring the whitening filter and DC cut filter
  • Determine frequency range, input amplitude, frequency step for measurement of the L- openloop transfer function
  • Determine an amplitude of the injecting signal at a fixed frequency
  • from 19:00 on 8/6 to 6:00 in next morning
• Analyses
  • Evaluation of fluctuation (L- loop)
  • Evaluation of error in transfer function estimation with injecting signals only at a fixed frequency
  • Quantitative evaluation of low frequency drifting in every control loops
  • Gathering fundamental informations for Data Taking 2

1999/8/2 (DT1)

• Tidied up the consoles, the racks and the floor of the center room. Installing a 16ch data logger.

1999/8/3 (DT1prep)

• Experiment started at 17 o'clock.
  l- filter improved. Alignment adjustment. Spots are adjusted at the center of the PDs.
• LSC and ASC of the IFO have been locked at 22 o'clock with common/differencial signals of frontal modulation.
  DT1prep started.
• Photos of DT1prep12345
• End at 6AM.

1999/8/5

• Supplimental measurements for the data taken on 8/3.
  Adjustments of the whitening filters
  Adjustment of the amplitudes of fixed frequency input
• It was discovered that the main sensitivity was improved when the offset voltage was applied to l- loop.
  -> This resulted in reduction of the amplitude noise.
• End at 0AM or so.

1999/8/6 DT1

• Workers
  Tasumi (leader), Kanda, Telada, Okutomi, Moriwaki,
  Ando, Kawamura, Takahashi, Nagano, Arai,
  Tsubono, Gerhard
• Interferometer
  • Starting alignment at 17:00.
  • In earlier stage, the IFO was somehow unstable.
  • The LD current has been reduced a bit. Then, the IFO became stable (21:00).
    The lock lasted 3hours.
  • The lock was lost at 0:00. The MC and the IFO were re-aligned.
  • The IFO became unstable again until 1:00.
    -> The alignment loop of EW arm END Pitch had small oscillation.
    -> Gain of this loop has been reduced a bit.
  • The IFO was so much stable. The lock continued until 8:00.
    7 hours stretch has been achived!
  • Necessities of compensation of BS orientation drift, completion of MC auto-alignment, lock-lost alarm, and automatic switching were recognized.

• DT1
  • Testing the data acquisition system with high sampling rate.
  • Measuring drift of transfer functions
  • Measuring drift of optical gain etc by applying fixed frequency signal.
  • Measuring variation of the main sensitivity.

1999/8/10 Recom2 Plan after DT1

• Rack rearrangement
  • Locating NIM crates(Tue)done
  • Rack rearrangement, reconnect(Tue)done
  • Panel manufacturing(Wed) -> postponed
• Beam Pointing drift monitor & control
  • Setting QPD at both End rooms(Fri)
  • Filter design and fabrication(Mon - Fri)done
• Alignment Filter Improvement
  • Design(Mon), Modification(Wed, Thu, Fri)done
• Detetion port reconfigure
  • Locating High-Power PD(Fri)
  • Building a housing(Tue)done
• Experiment (I) 8/10 (Tue) -> postponed to 8/11 (Wed) because of emergency vent of MC.done
  • Coil driver (MC, BS, FMs) calibration (AF, DC, 符号も含む)done
  • Alignment filter checkdone
  • Sensitivity with offset applied to dl- and dL-done
• Experiment (II) 8/13 (Fri) -> postponed due to heavy rains with thunder volts
  • Sensitivity with improved alignment filters
  • Apply the offset
  • BS orientation control test

1999/8/13 Detector Meeting 10:00~

1999/8/16 Prep for the experiment on 8/17

• Beam Pointing drift monitor & control
  • Configuring QPD at both End roomsdone
• Lock detector and alarmdone

1999/8/17 Experiment with the IFO

• Subject
  Improve the sensitivity (High power detector, new alignment filters, offset)
  Improve stability (BS drift control)
• Man power
  Nagano, Ando, Takahashi, Arai

1999/8/19~22 300m floor repairment

• Object
  Center room, mainly where damage of the painting is severe,
  and where the traffic is heavy.
  
• Cleaning up (8/19 10:00~12:00)
  
  Tatsumi d300(DAQ), Meeting space, Electronics shop
  Ando IFO console, optical benches, arounf laser source
  Fukishima Steps etc.
  
  Each person in charge of each experiment is responsible to his own set up.
  
  -> Floor sheets are glued on the floor of the electronics shop and the IFO console.
  -> Tidied up the desks, the chambers, and the optical benches
  
• Sheet (8/20 10:00)
  
  Glue new floor sheet on the meeting place
  Grounding to protect electro static charge up.
  Tidy up the meeting space.
  
• TAMA Project review comittee (8/21)
  
• Floor painting (8/21 16:00)
  
  Floor painting after the comittee's visit to the TAMA site.
  Repair cracks on the floor.
  Paint the steircase.
  
• Keep out from TAMA300 (8/22)

1999/8/20 evening~midnight Experiment on the IFO

1999/8/23~27 Plan

• 8/23 (Mon), 24 (Tue) Refinement of the laser system
• 8/25 (Wed) BS tank open, PD etc. install
• 8/26 (Thu), 27 (Fri) evacuation, construction above MC duct.

1999/8/26~27 Construction of a bridge above MC duct

1999/8/27 Detector Meeting (10:00~) @ Cosmos house