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Useful Acronyms
FSS = Frequency Stabilization Servo
ISS = Intensity (Power) Stabilization Servo
PMC = Pre-Mode Cleaner
LO = Local Oscillator
PA = Power Amplifier
PO = Pick Off
AOM = Acousto Optic Modulator
EOM = Electro Optic Modulator
PZT = Piezoelectric Transducer
NPRO = Non-Planar Ring Oscillator (type
of laser installed here)
* Only fast channels (sampling frequency => 256 Hz) for S6 are shown. Hence, the NPRO Monitor and Amplitude Monitor are not identified here.
** The Livingston channel is incorrectly labeled as a Current Shunt. The Hanford channel is correct in labeling it an AOM.
*** _NW denotes no whitening. _W denotes whitening. Channels with two different endings have the same source but are taken at a different sampling frequency (2048 Hz for _NW, 16384 Hz for _W).
Channel Key*
1 L1:PSL-FSS_FAST_F
2 L1:PSL-FSS_MIXERM_F
3 L1:PSL-FSS_RCTRANSPD_F
4 L1:PSL-FSS_RFPDDC_F
5 L1:PSL-ISS_CURRSHNT_NW **,***
L1:PSL-ISS_CURRSHNT_W
6 L1:PSL-ISS_ILMONPD_NW
L1:PSL-ISS_ILMONPD_W
7 L1:PSL-ISS_ILSENSPD_NW
L1:PSL-ISS_ILSENSPD_W
L1:PSL-ISS_OLMONPD_NW (Not Shown)
L1:PSL-ISS_OLMONPD_W
8 L1:PSL-PMC_ERR_F
9 L1:PSL-PMC_PZT_F
10 L1:PSL-PMC_RFPDDC_F
11 L1:PSL-PMC_TRANSPD_F
Enhanced LIGO Pre-Stabilized Laser
Denotes laser light.
Denotes FSS signal.
Denotes PMC signal.
Denotes ISS signal.
Denotes other electronic signal.