TITLE: Jan 9 DAY Shift 16:00-00:00UTC (08:00-14:00 PDT), all times posted in UTC

STATE Of H1: Obser ing

SUPPORT: Jeff K, Rick S.

INCOMING OPERATOR: Corey

SHIFT SUMMARY: IFO locked fo the duration of the shift. Environmentally,  we were more or less sound. µSeism extended past the 90th% line to .8Mm/s occassionally. RF45 noise dominated the lock time. PCal frequencies were changes and RF45 offsets were “bumped” in an effort to terminate glitching. For a little over 2 hours our range seems to be back, glitch free, at ≈78Mpc. Jeff is still on site doing some work. Handing off to Cheryl.

ACTIVITY LOG:

18:26  out of Observing to turnoff P-Cal line(s) at EX to observe 45Mhz noise in DARM for subsequent effects

18:30 Jeff changing the P-Cal frequncy to 2001.3K 35Kamp.

18:37 changed RF45 offset by .4(neg). This changed the noise characteristics of DARM (as expected). We will wait and see what effects this will have.

18:43 RF45 offset returned to nominal value.

18:44  PCal X value changes accepted in SDF.

18:44  Intention Bit set back to Undisturbed

18:54 MICH and PRCL live have settled back down to their respective references.

18:58 well, that was short lived……. the noise seems to be sharper in PRCL between 15 and 25 Hz. The correlating noise in MICH is much broader. It seems to be glitching now rather than constant as before. THe only other ‘heads up’ noise correlation I can see is the unsteadiness of RF45 Coherence between 1 and 10Hz.

19:10 the noise is still glitchy but diminished in nature.Range back to 78Mpc range, save for one large ETMY saturation.

CONT….  aaannnd we’re back to crud.

21:19 Kyle heading down to MY to do the daily overfill of CP

21:49 15 minutes now; Range is back and glitchiness is down. It appears to be random.

21:51 Intention bit set back to Observe

22:05  Kyle back from MY

22:42 Intention bit set back to Observe after PCal freq was moved to 1KHz

23:06  Tour group into the Control Room