aLIGO LHO Logbook

H1 INJ (CAL, DetChar, ISC)

jeffrey.kissel@LIGO.ORG - posted 14:18, Wednesday 30 September 2015 - last comment - 06:21, Thursday 01 October 2015(22121)

Testing PCAL as Hardware Injector

C. Biwer, J. Kissel

Taking advantange of single IFO time to run PCAL vs DARM hardware injections. More details later.

Comments related to this report

jeffrey.kissel@LIGO.ORG - 15:11, Wednesday 30 September 2015 (22122)

Link

PCAL Injection tests complete. PCAL X has been restored to nominal configuration.


Injection           Approx End time (GPS)
DARM 1              1127683335
PCAL 1              1127683906
PCAL 2              1127684171
PCAL 3              1127684465
DARM 2              1127684766
DARM 3              1127685143

More details and analysis to come.

These were run from the hwinjection machine as hinj.
Usual DARM Command
awgstream H1:CAL-INJ_TRANSIENT_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d

PCAL Command:
awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d

We turned OFF the 3 [kHz] PCAL line during the excitation.

We're holding off on observation mode to confir about other single IFO tests we can do while L1 is down.

christopher.biwer@LIGO.ORG - 15:14, Wednesday 30 September 2015 (22123)DetChar, INJ

Link

I've attached omega scans of the PCAL and DARM injections.

All injections used the 15Hz template from aLog 21838.

Images attached to this comment

andrew.lundgren@LIGO.ORG - 17:08, Wednesday 30 September 2015 (22127)DetChar, INJ

Link

The SNRs of the Pcal injections seem a bit lower than intended. Omega reports SNR 10.5 for the injection through the normal path, which is about right. But for the Pcal injections, the SNRs are 5.5, 7.6, and 7.2. Note that these are the SNRs in CAL-DELTAL; someone should check in GDS strain as well. Links to scans below:

Standard path
Pcal 1
Pcal 1
Pcal 1

peter.shawhan@LIGO.ORG - 06:21, Thursday 01 October 2015 (22143)INJ

Link

*** Cross-reference: See alog 22124 for summary and analysis