[kTanaka, Hirose]

We measured the sensing matrix of WFSs in PRFPMI. Tanaka-san posted the prosses for measurement(klog30964). This post summarizes the OUTPUTmatrix settings for the same tilt on each TypeA mirror for FPMI DOF signals before sensingmatrix measurement, and the sensing matrix plots.

Details:

• The output matrix was set so that the Type A Oplev signal was equally tilted at the DHARD, CHARD, DSOFT, and CSPOFT degrees of freedom (at 13 Hz).(Before :FIG1、After :FIG2)
  (Result: FIG3-FIG10, REF is before setting, and the solid line is after setting.)
• Summarized the SensingMatrix.
  (PDF file: the sensing matrix of {17MHz, 45MHz} of REFL{WFS1,2}, the sensing matrix of 11MHz(WFSf3) of REFL{WFS3, 4}, the sensing matrix of {17MHz, 45MHz} of POP{WFS1,2}, the sensing matrix of {17MHz, 28MHz} of AS{WFS1,2})
• As a result of PIT, the DHARD signal stood out among all the signals. DHARD must be definitely controlled.
• As a result of YAW, the CHARD signal stood out among all the signals. The coupling of other degrees of freedom is also large, so discussion is needed on how to set the demodulation phase and how to set the input matrix.