KAGRA Logbook

I performed the PEM injection test (continuously OMC bellows leg injection for evaluating the noise projection below 400 Hz)

07:07:00 - 07:20:00 silent run

07:20:00 - 08:03:40

Swept sine injection, 20 cnt, 400 - 180 Hz, 1 Hz resolution, 10 s in each frequency
K1:PEM-EXCITATION_SR3_RACK_7_EXC
Locked loss happened

08:30:00 - 08:56:00
K1:PEM-EXCITATION_SR3_RACK_7_EXC
Swept sine injection, 20 cnt, 180 - 50 Hz, 1 Hz resolution, 10 s in each frequency

9:00:00 - 9:35:00
K1:PEM-EXCITATION_SR3_RACK_8_EXC
Swept sine injection, 800 cnt, 50 - 10 Hz, 1 Hz resolution, 50 s in each frequency, 1 s setting time, 1 s ramp down
REF : K1:PEM-SEIS_OMC_GND_Z_OUT_DQ or K1:PEM-ACC_OMC_CHAMBER_OMCLEG_Z_OUT_DQ
Locked loss happened during the injection (maybe 12 or 13 Hz)