Differences between revisions 6 and 12 (spanning 6 versions)
⇤ ← Revision 6 as of 2018-05-04 23:38:08 →
Size: 962
Editor: KeikoKokeyama
Comment:
← Revision 12 as of 2018-05-05 00:13:38 → ⇥
Size: 1569
Editor: KeikoKokeyama
Comment:
Deletions are marked like this. Additions are marked like this.
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 * MICH LOCK flag
  * K1:GRD-LSC_LOCK_STATE_N (16Hz sampling)
   * 1000 is operation mode
Line 21: Line 25:
   * digital anti-imaging filter
Line 22: Line 27:
   * time delay in the DAC output (There is unknown issue) (~60usec???)
    * The detail is summarized in ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6924 | JGWDoc6924]])
   * analog anti-imaging filter
   * Coil driver(The transfer function is still investigated, with connection of coil)
   * Force to length transfer function(1/f^2 for higher frequency)
   * Actuator efficiency (Large uncertainties due to fluctuation of optical gain)

Summary of Continuous Wave Injection at bKAGRA phase1 operation

  • Worker : T.Yokozawa, A.Miyamoto, T.Sawada
  • MICH LOCK flag
    • K1:GRD-LSC_LOCK_STATE_N (16Hz sampling)
      • 1000 is operation mode
  • Injection flag
    • (1) K1:CAL-CS_CALHWI_CW_INJ_SW (16Hz sampling, on:1 off:0)
      • Hardware injection switch of CW injection (used in injection flag)
    • (2) K1:CAL-CS_CALHWI_HWINJ_SW (16Hz sampling, on:1 off:0)
      • Hardware injection master switch (used in injection flag)
    • (3) K1:CAL-CS_CALHWI_(X/Y/BS)_GAIN (16Hz sampling)
      • Signal gain to X, Y, BS
  • Injection signal
    • (4) K1:CAL-CS_CAL_HWI_HARDWARE_DQ (16kHz sampling)
    • Total amplitude of Hardware injection(CBC+CW+TEST)
  • So, total amplitude of CW injection is
    • (1)*(2)*(3)*(4) [count]
    • But, we should apply transfer function between injection port and displacement of each test mass when evaluating the TM displacement
      • time delay between cal model and BS model (~61usec)
      • digital anti-imaging filter
      • time delay in the BS IOP(shared memory for DAC output) (~61usec)
      • time delay in the DAC output (There is unknown issue) (~60usec???)
      • analog anti-imaging filter
      • Coil driver(The transfer function is still investigated, with connection of coil)
      • Force to length transfer function(1/f^2 for higher frequency)
      • Actuator efficiency (Large uncertainties due to fluctuation of optical gain)

KAGRA/Commissioning/Phase1/Operation/MeasurementsSummary/CWInjection (last edited 2018-05-07 14:53:29 by TakaakiYokozawa)