After Evan & Filiberto were out of LVEA relocked the IOF on the first attempt with no apparent problems. Ran the A2L script and cleared the SUS SDF notifications. Back to Observing mode at 20:40 (12:40) 

   SDF notification are listed in the attached snapshots. 

NOTE: Still getting RF45 noise and ETMY saturations. Range is being adversely effected 

Not a generally good morning. 

   IFO broke lock at 16:16 (08:16). After running initial alignment; relocked the IFO and went into Observing mode at 18:25 (10:25). Shortly after relocking started seeing a lot of RF45 noise events at a rate of several per minute. It was decided to have Evan & Filiberto to go into the LVEA to check the RF cabling. 

   While Evan & Filiberto were in the LVEA working on the cabling, the IFO dropped lock. Waiting for them to come out before relocking.
         

   After relocking this morning the RF45 noise has come back, at a rate of several time per minute. This is knocking the range down into the high teens and low 20s Mpc. Confer with Evan, Keita, Mike, Daniel, and Filiberto. 

   Set the intent bit to Commissioning while Evan & Filiberto are in the LVEA checking cabling.   

IFO broke lock at 16:16 (08:16). Cause at this time is unknown. 

During relocking could not move past DRMI_1F. Consulted with Kiwamu and decided to run an initial alignment. IFO was relocked at NLN at 17:47 (09:47). Ran A2L script. There were SDF notifications for both ETMs and ITMs. Could not find a SUS person, so took screenshots and accepted all. Set intent bit to Observing at 18:25.    

Spoke with Hugh about the BSC ST2 Guardian notifications.  

Pursuant to a discussion on the PSL call this morning, I'm posting trends of the humidity and temperature in the Laser Room, Laser Diode Room, and Chiller Room over the past 365 days.

The humidity sensors are coupled with the temperature sensors.  We have more temperature sensors, but we decided not to record their coupled humidity sensor signals.

Attached is a plot of the NPRO output power and the output power of the two pump diodes for the past 4 years.
One can see that the diode current was increased around 8/16/2013 and 6/5/2014.  The first increase in pump
current was about 200 mA; the second about 50 mA.

This NPRO is very close to its "maximum" diode current.

O1 days 46,47

model restarts logged for Mon 02/Nov/2015 No restarts reported

model restarts logged for Tue 03/Nov/2015
2015_11_03 09:30 h1hpiitmy
2015_11_03 09:30 h1iopseib1
2015_11_03 09:30 h1isiitmy
2015_11_03 10:16 h1isibs
2015_11_03 10:18 h1isiitmx
2015_11_03 10:26 h1isietmx
2015_11_03 10:31 h1isietmy

Maintenance day. Power cycle of h1seib1, new BSC ISI models with reduced sensitivity to coil driver temp status bit when triggering watchdog.

Title:  11/04/2015, Day Shift 16:00 – 00:00 (08:00 – 16:00) All times in UTC (PT)
	
State of H1: 16:00 (08:00), The IFO is locked at NOMINAL_LOW_NOISE, in Observing mode 

Outgoing Operator: Jim

Quick Summary:  IFO locked in Observing for the past 9 hours. Winds are calm to light (0 – 3mph), seismic activity is quiet; microseism is centered around 0.3 um/s.   

     


A

Apologizes for the late entry.

Yesterday all site supply fans were lubricated per the quarterly schedule.

We also took the maintenance period opportunity to change some extremely dirty air filters which are located in the supply fan areas.

TITLE: 11/03 Owl: 8:00-16:00 UTC 
STATE Of H1: Observing @ ~75 MPc.
SHIFT SUMMARY: 
SUPPORT:
ACTIVITY LOG:

H1 was locked when I arrived, RF45 was acting up occasionally, though. Otherwise quiet shift.

15:00 UTC Started receiving CS temp notifications, Bubba notified/working on it.

This morning about 15:00 UTC, I got a couple notifications that temps were low in the LVEA. I let Bubba know, but he was already working on it. I haven't heard any notifications since, Bubba said he will keep an eye on it.

I have turned off the violin mode damping filters for IX and IY by zeroing their gains. Patrick accepted these into SDF so that we can go to observing.

This is meant to be temporary, i.e., for this one lock only.

The next time the interferometer comes into lock, the Guardian will turn on the normal violin mode damping settings. These settings will appear as SDF diffs (two on IX, and six on IY). These should be accepted into SDF.

We do not expect these modes to ring up during the course of the lock. However, if the mode height on the control room DARM spectrum around 500 Hz rises above 10⁻¹⁶ m/rtHz, the damping should be turned back on:

1. Make sure the ramp times for the damping filter modules are at least a few seconds (currently they seem to be set to 10 s).
2. The filters should already be configured to provide the right damping phase, so changing the filters should not be necessary.
3. Start typing in gain settings. Refer to the values listed below. If the violin mode amplitude is much much higher than usual (e.g., it's off the scale on the control room DARM spectrum), it is wise to start with a small gain (e.g, gain of ±1) in order to make sure the suspension drive does not saturate. Then you can increase the gain in several steps, until the nominal setting is achieved.

A screenshot of the nominal IY damping settings is attached (I didn't take one for IX).

ITMX:

• MODE3 gain: −100
• MODE6 gain: +200
• all others zero

ITMY

• MODE1 gain: −200
• MODE2 gain: −200
• MODE3 gain: +100
• MODE4 gain: −50
• MODE5 gain: +400
• MODE6 gain: +50
• all others zero

Now that we've cleaned up all of our systematics from the DARM model and released the O1 version (see LHO aLOG 22056, I've updated the diagram that explains how the actuation path clock cycle delay is derived, and also shows that the current value of 7 [clock cycles] or 427.3 [us] that was recently installed at both sites (LHO aLOG 21788) still does a fine job at approximating the total delay between the inverse sensing and actuation chains.