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Reports until 00:16, Thursday 19 July 2012
H2 ISC
matthew.evans@LIGO.ORG - posted 00:16, Thursday 19 July 2012 - last comment - 15:17, Thursday 30 August 2012(3490)
OAT - first dither alignment

It is a long way from being robust, and it is quite slow, but the cavity dither alignment worked this evening.  The commands are:

YAW
./tdsdither 1.9 30 4 0 300 H2:SUS-ITMY_M0_TEST_Y_EXC H2:ISC-ALS_EY_REFL_PWR_MON_OUT H2:SUS-ITMY_M0_OFFSET_Y 10 5
./tdsdither 2.3 50 5 0 300 H2:SUS-ETMY_M0_TEST_Y_EXC H2:ISC-ALS_EY_REFL_PWR_MON_OUT H2:SUS-ETMY_M0_OFFSET_Y 10 5

PIT
./tdsdither 1.9 30 4 90 300 H2:SUS-ITMY_M0_TEST_P_EXC H2:ISC-ALS_EY_REFL_PWR_MON_OUT H2:SUS-ITMY_M0_OFFSET_P 10 5
./tdsdither 2.3 50 5 30 300 H2:SUS-ETMY_M0_TEST_P_EXC H2:ISC-ALS_EY_REFL_PWR_MON_OUT H2:SUS-ETMY_M0_OFFSET_P -10 5
 

The new tdsdither is a perl script replacement for the malfunctioning ezcademod which currently lives in userapps/trunk/isc/common/scripts.  The attached image shows the power increase as the ITM and ETM alignment are dithered.

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alberto.stochino@LIGO.ORG - 15:17, Thursday 30 August 2012 (4042)

With the new channels names the commands are:

PIT

./tdsdither 1.9 30 4 90 300 H2:SUS-ITMY_M0_TEST_P_EXC H2:ALS-Y_REFL_B_PWR_OUT H2:SUS-ITMY_M0_OFFSET_P 10 5

./tdsdither 1.9 30 4 90 300 H2:SUS-ETMY_M0_TEST_P_EXC H2:ALS-Y_REFL_B_PWR_OUT H2:SUS-ETMY_M0_OFFSET_P -10 5

 

YAW

./tdsdither 1.9 30 4 90 300 H2:SUS-ITMY_M0_TEST_Y_EXC H2:ALS-Y_REFL_B_PWR_OUT H2:SUS-ITMY_M0_OFFSET_Y 10 5
./tdsdither 1.9 30 4 90 300 H2:SUS-ETMY_M0_TEST_Y_EXC H2:ALS-Y_REFL_B_PWR_OUT H2:SUS-ETMY_M0_OFFSET_Y 10 5

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