eric.thrane@LIGO.ORG - posted 03:35, Saturday 30 May 2015 - last comment - 12:49, Monday 01 June 2015(18713)
transient injection tests with svn-controlled tinj
Kiwamu, Jeff, Dan, Cheryl, Eric We successfully tested the transient injection code tinj at LHO for the first time. This is also the first test of tinj since we added interaction with EPICS channels and migrated to svn. An earlier version had been previously demonstrated at LLO. The tests were carried out between GPS = 1117004777 - 1117006270. We scheduled the standard BNS injection (1.4 on 1.4 msun with optimal orientation at 45 Mpc) that has been used in previous tests [1]. This file, which lives in svn, is called injection_H1.out. The goal of the test was to inject this waveform with increasing loudness until the folks at LHO could see the signal sweeping across the strain spectrum. The first attempt failed to inject because H1:CAL-INJ_TINJ_ENABLE = 0. We set the value to 1. The next several attempts (GPS = 1117004777, 1117004993, 1117005152) failed to show up because the transient gain in the CAL model was set to zero. We set it to one and started over. The following injections were successful: 1117005396 2 1 injection_ 1117005598 2 4 injection_ 1117005756 2 10 injection_ 1117005914 2 100 injection_ 1117006170 2 100 injection_ The first column is GPS time, the second is injection type (2 = CBC), the third is scale factor, and the last column is the prefix for the injection file. Dan and Kiwamu weren't 100% sure they were seeing the BNS signal until we injected with a scale factor of 100. During the last injection, (scale factor = 100), Jeff and Eric watched the output of HWINJ filter bank. At the very end, it reached a value of ~50 counts, which did not exceed the current HWINJ LIMIT = 200. We fixed a bug with tinj. First, we fixed a bug, in which the value of TINJ_PAUSE was interpreted incorrectly (1 should have been 0). Also, the binary executable for tinj included in svn yielded a library error: tinj: error while loading shared libraries: libmwlaunchermain.so: cannot open shared object file: No such file or directory So, we recompiled a version that works at LHO and recommitted to svn. NOTE: we have left tinj running in the background for a stability test. However, there are no planned injections currently scheduled. [1] https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=17073
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