aLIGO LHO Logbook

H1 ISC

sheila.dwyer@LIGO.ORG - posted 18:40, Friday 09 February 2018 - last comment - 14:15, Monday 12 February 2018(40477)

measuring spot positions in PRC

This afternoon Georgia and I locked PRMI and ran a2l for PRM, PR2, and PR3.

	PRM	PR2	PR3
P2L	1.099	0.173	2.614
Y2L	0.046	-8.34	-0.050

There is a file called by the a2l scripts (for the matrices) that is no longer in the place it used to be. We added the ads matrix to the list of matrices used in ISC_library, so that these scripts now import and use that.

Comments related to this report

georgia.mansell@LIGO.ORG - 14:15, Monday 12 February 2018 (40502)

Link

I have converted these P2L and A2L values to spot position using Alexa and Kiwamu's numbers for the HSTS (PRM & PR2) and HLTS (PR3), shown in alog-14788, and the same maths as in alog-40422.

	A2L	L_{euler}	a_{euler}	alpha	spot position* [mm]
PRM p	1.099	.25	5.2382	0.0524	-2.21
PRM y	.046	.25	5.2382	0.00220	0.0926
PR2 p	.173	.25	5.2382	0.00826	-0.348
PR2 y	-8.34	.25	5.2382	-0.398	-16.797
PR3 p	2.614	.25	2.4096	0.271	-14.2
PR3 y	-0.05	.25	2.4096	-0.00518	-0.492

*spot position relative to center of mirror, face-on.