Transfer functions of the injection locking servo electronics were taken. The previous measurements from when the PSL underwent acceptance testing are posted in the DCC under https://dcc.ligo.org/DocDB/0100/E1300129/001/tf.pdf That result listed the unity gain and phase margin as being 2.8 kHz and 57 degrees respectively. With the previous setting of gain = -1.50V, the unity gain is ~8.5 kHz with about 40 degrees of phase margin. Setting the gain to -1.70V, upped the unity gain to ~10 kHz. This is consistent with the acceptance test result from L1, which is in the DCC under https://dcc.ligo.org/DocDB/0068/E1100716/006/injection_locking_tf.pdf Also attached is the oscilloscope image of the injection locking error signal. Jason, Peter
C. Cahillane I have generated a C01 and C02 calibration systematic error spectrogram for all of O1. The spectrogram takes the calibration from every day of O1. The frequency vector goes from 5 to 3000 Hz. These plots are preliminary because my veto definer files do not veto all bad times, so I still have to hack together some vetoes of my own. This is mostly a concern for the LHO C01 plots. This will be resolved ASAP. The plots have dashed blue lines at Sep 14 2015, Oct 11 2015, and Dec 26 2015. For reference I have included LHO Dec 26 Uncertainty Budgets for both C01 and C02. These should correspond to the third dashed blue line in the spectrogram. Next, once the vetoes are properly applied, I will post revamped systematic error spectrograms alongside Total O1 Uncertainty Budgets. Without the correct vetoes my Total O1 Budgets are not yet useful. For the LLO All of O1 Calibration Spectrograms, please see LLO aLOG 25618
Log:
01:30 Evan and Craig back from EY
~09:00 Japanese film crew came back to report that they left two cameras on the hill along the Y arm between "4th and 5th door" (door counting from corner station). That's somewhere between corner station and mid Y.
Kyle, Gerardo, Chandra Received HV pump cables and custom length power cords that had been ordered last week -> HAM7, BSC4 and HAM12 annulus pumps started today -> pump carts moved from HAM9 to HAM8 and BSC4 to HAM6. Gerardo Routed and terminated CDS signal cables to HAM7 and HAM12 annulus ion pump controllers Kyle Pumping HAM5/HAM6 annulus volume with pump carts at each pump port -> Energized HAM5 and HAM6 ion pump controllers
Kyle, Chandra Opened valves that were soft closed a week ago. GV 7 needed 40 psig. GV 5 needed 45 psig to open. Attached is plot of pressures on either side of each valve before and after opening. Before we realized to pump the gate annulus after a week, we had already set pressure against pistons to 20 psig, shifting gate slightly and releasing annulus gas into beam tube.
The take away from this observation is that O-rings of GV5 and GV7 must have been in full contact with their sealing surface whilst soft-closed, i.e with 5 - 10 psi applied to the top of their pistons. This is as intended. Had they not been in full contact, the gate annulus volumes would have been pumped by the adjacent vacuum volume(s) and no gas release would have occurred when the gates where stroked open. Typically we would have "burped" the un-pumped gate annulus volume into the rest of the annulus piping before opening the gate valves. In summary, soft-closing GV5 and GV7 does provide protection to the Beam Tubes.
John, Patrick, Richard The EPICS state code that controls the enabling and disabling of the cold cathode gauges was not installed for the gauges that got added to HAM1 and HAM6 (PT100 and PT110). However, the on/off toggle buttons on the medm screens for these gauges were writing to the state code request channels. This is why toggling these buttons had no effect. I updated the H0VE_LX_Y0.adl and H0VE_LY_X0.adl medm screens to use the channels that output directly to hardware instead of the state code request channels: request channel hardware channel HVE-LY:X0_HSCCONOFF -> HVE-LY:X0_HS100 HVE-LX:Y0_HSCCONOFF -> HVE-LX:Y0_HS110
Kyle, Chandra Pumped down HAM6 from atmosphere to 0.5 Torr in 3 hrs. Turned turbo pump ON. It tripped once (overload) after many minutes of spinning up. Restarted turbo; it came up to speed in normal time. It felt hot to the touch so we placed a fan near it. Current HAM6 pressure = 4.5e-5 Torr
Day's Activities:
"Operator note: One can tell if Beckhoff goes down by looking at the Slow Controls section on the CDS Overview....if anything is frozen, it's not running."
As a reminder, the DIAG_MAIN has a test to look for exactly that. Though, it has become saturated and lit up from all of the vent and PSL work going on.
1535 -1350 hrs. local -> To and from Y-mid Exhaust check valve bypass opened, LLCV bypass opened 1/2 turn ccw -> LN2 at exhaust in 2 mins 10 secs. (Restored valves to as found) Next CP3 over-fill to be in < 72 hours.
End X PEM ADC 0 channels 8-13 (starting from 0) have been activated for a PEM test. These channels are already in the science and commissioning frames as H1:PEM-EX_ADC_0_08_OUT_DQ through H1:PEM-EX_ADC_0_13_OUT_DQ at a sample rate of 2048. Until this afternoon, the values were fixed at 0.
At Bryn Pearlstone's suggestion, Weigang Liu has tried folding data daily/monthly/O1ly from corner station magnetometer channels beyond the ones reported on previously, where as before, data from October 20 (day of unplanned power outage) has been excluded. Attached are the summary plots, while links to the daily & monthly plots are here: H1:PEM−CS_MAG_EBAY_LSCRACK_X_DQ H1:PEM−CS_MAG_EBAY_LSCRACK_Y_DQ H1:PEM−CS_MAG_EBAY_LSCRACK_Z_DQ As before, each figure has a top graph with the raw folded (averaged) data, a middle graph with the spectrum of the folded data, and a bottom graph which is the inverse FFT of the lowest 40 Hz. These graphs are qualitatively similar to those seen before for some CS magnetometer channels in that there is a 2-second periodicity with a positive excursion at a 1-second boundary, followed by a negative excursion at the next 1-second boundary, and there is additional fine structure, most notably an extra transient seen at the 0.25-second mark in successive 1-second intervals. In addition, the X channel shows a transient at the 0.5-second mark of each second, and the Z channel here seems most different in character from previously examined magnetometer channels. These fine structures are seen throughout O1.
The FAMIS procedure notes the normal operating range for the oplevs is +/- 10urad (but some can still operate normally beyond this). I'm assuming the count values in dataviewer are in urad. Attached are the pit, yaw, & sum 7-day trends.
Notes:
This closes out FAMIS #4670.
Kyle, Chandra Started rough pump down of HAM6 at 10:48am local time. Dew point of blow down measured -20degC.
I have terminated the LO inputs to the AS 90 WFS chassis (as well as the cables that normally go to these ports), so that we can see if the dark offsets are more stable without the triplexer. Later today, I'll swap the terminators to be at the front of the triplexer box, to see if that changes things.
I have reverted this back to its nominal configuration. It looks like the signals got much cleaner on 9Apr, around 10UTC, so I want to see if they are still clean after going back to the nominal config. I can't find any cables that seemed bumped or out of place from the vacuum team's work, although they were working in the HAM6 area on both Thursday and Friday last week.
MONDAY MEETING:
General Announcement: It's always best to provide data in alogs. If you have a long entry, perhaps the bulk of this should be entered as a document in the DCC. (Vern)
SEI: All vibration absorbers installed, and B&K measurements look good! ISC (i.e. Evan) tested ISC items such as shutters. (Jim)
PSL: Summary given for work from last week and HPO work continues this week. (Jason)
VAC: 5pm fri & doors on. GV5&7 opening hopefully this afternoon (Chandra)
Miscellaneous:
COMMISSIONING MEETING
Jim B. notified me that the uptime for all of the PLCs on h1ecatx1 stopped updating last Thursday. Their time on the CDS overview is frozen at 7 2 45 1 (D HH MM SS). Logging on to h1ecatx1 it appears that the IOC has crashed (screenshot attached).
Daniel restarted the IOC and it came back. I burtrestored to 6:10 local time this morning. Cause of error not yet determined.
FRS 5270 created.