aLIGO LHO Logbook

H1 SUS

arnaud.pele@LIGO.ORG - posted 15:54, Thursday 28 March 2013 (5908)

BSFM/QUAD opticalign sliders

After the recent update of the HLTS and HSTS opticalign sliders (see aLog 5866), I modified a few things for the alignment offsets in BS, ETMY and ITMY.

Modified the sliders' range (in urad), to make it consistent with DAC's maximum output.

New sliders range
Optic	DOF	Range(urad)	Ref document
BS	Pitch	+/-1529	T1100602-v2
BS	Yaw	+/-6386	T1100602-v2
QUAD M0-R0	Pitch	+/-440	T110595-v2
QUAD M0-R0	Yaw	+/-610	T110595-v2

Modified the OPTICALIGN gain for ETMY/ITMY, to make it consistent with the units displayed on the medm screen (urad instead of nrad)
Entered the values of the OPTICALIGN gain for BSFM

New OPTICALIGN gains
Optic	DOF	Gain (Cts/urad)	Ref document
BS	Pitch	4.714	aLog 5361
	Yaw	4.268
QUAD M0-R0	Pitch	23.219	aLog 4730
	Yaw	51.689

Details :

In order to change the sliders range I modified the OPTICALIGN adl files by opening it with medm in edit mode, and changed the limit of the sliders.

SUS_CUST_BSFM_M1_OPTICALIGN.adl located in /opt/rtcds/userapps/release/sus/common/medm/bsfm for BSFM
SUS_CUST_QUAD_${M0/R0}_OPTICALIGN.adl located in /opt/rtcds/userapps/release/sus/common/medm/quad for ETM/ITM

The files have been commited to the svn as well as the new safe.snap files