aLIGO LHO Logbook

H2 SUS

jeffrey.garcia@LIGO.ORG - posted 17:51, Tuesday 07 February 2012 - last comment - 19:04, Tuesday 07 February 2012(2180)

ETMY M0 Open Light Counts

ETMY M0 Open Light counts, offsets, and normalising gain values.  Offsets are calculated by dividing the open light counts by two and multiplied by (-1).  The gain values are calculated such that the open light counts are normalised to 30,000cts.
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M0:

tdsavg 30 H2:SUS-ETMY_M0_OSEMINF_F1_IN1 H2:SUS-ETMY_M0_OSEMINF_F2_IN1 H2:SUS-ETMY_M0_OSEMINF_F3_IN1 H2:SUS-ETMY_M0_OSEMINF_LF_IN1 H2:SUS-ETMY_M0_OSEMINF_RT_IN1 H2:SUS-ETMY_M0_OSEMINF_SD_IN1
25685.5
29665.2
26661.4
30932.4
27570.6
29929.9

OSEMINF OFFSETS:
F1 = -12843
F2 = -14833
F3 = -13331
LF = -15466
RT = -13785
SD = -14965

OSEMINF GAINS:
F1 = 1.168
F2 = 1.011
F3 = 1.125
LF = 0.970
RT = 1.088
SD = 1.002

Comments related to this report

jeffrey.garcia@LIGO.ORG - 19:04, Tuesday 07 February 2012 (2181)

Link

The M0 OSEMs on the ETMY QUAD are now backed off completely to expose the full light beam on the PDs. The SUS crew will center these OSEMs so TFs can be made before the TMS install.