[Kamiizumi, Tomura, YamaT]

Abstract

This work is related to klog#23195 and klog#23368.
We checked the existence of ADC glitches for all channels on IOO0, IOO1, and IMC0 racks.

Details

Glitchy channels on each rack are as follows.
IMC0 rack (Fig.1~Fig.8)
ADC0_CH08: MCO_TM_OPLEV_SEG1
ADC1_CH01: IMC-MCE_TRANS_QPDA1_DC_SEG2
ADC1_CH15: IMC-IMMT1_TRANS_QPDA2_DC_SEG4
ADC1_CH22: unused

IOO0 rack (Fig.9~Fig.24)
ADC0_CH01: PSL-PMC_LO_POWER_MON
ADC0_CH09: PSL-TTFSS_LO_MON
ADC1_CH04: IMC-SERVO_SLOWFB_MON
ADC1_CH19: unused
ADC2_CH07: unused
ADC2_CH17: PSL-IP_QPD2_DC_SEG2
ADC2_CH20: unused
ADC2_CH25: IMC-RFREFL_DC
ADC2_CH30: unused
ADC3_CH01: IMC-REFL_QPDA1_RF14_Q1
ADC3_CH26: LSC-REFL_PDA2_DC
ADC3_CH31: unused

IOO1 rack (Fig.25~Fig.36)
ADC0_CH03: unused
ADC0_CH13: MZM-SECOND_DEMOD_I
ADC0_CH31: duotone
ADC1_CH02: PSL-ALIGNMON_OUTPUT_QPDA1_DC_SEG3
ADC1_CH04: PSL-ISS_ALIGNMON_QPD_A_SEG1
ADC1_CH09: PSL-ISS_ALIGNMON_QPD_B_SEG2
ADC1_CH13: PSL-ISS_ALIGNMON_QPD_C_SEG2
ADC1_CH17: PSL-ISS_ALIGNMON_QPD_D_SEG2
ADC1_CH24: PSL-ISS_FIRST_SERVO_REF_MON
ADC2_CH02: ALS-Y_FIB_FAST_MON
ADC2_CH04: ALS-Y_FIB_SLOWFB_MON
ADC2_CH09: ALS-Y_FIB_FAST_DAQ
ADC2_CH13: PSL-ISS_SECOND_SERVO_REF_MON
ADC2_CH17: MZM-DD_IIF2


And also, we found 12Hz and its harmonics on most of channels in IOO0 rack.
Figure 37 shows the spectra of some channels taken around 11:00 (References) and ones taken around 13:00.
Peak frequencies move from 12Hz to 14Hz in 2hrs.