ops

 830 - HFD onsite for hydrant maintenance
913 - Travis and Betsy begin working at ITMY
915 - Jeff and Andres working in LVEA
916 - Power cycling dustmon5 (Andres)
934 - Keita to EX
935 - HFD work complete
940 - Richard shutting down water pump
938 - Karen opening LVEA emergency door alcoves to facilitate cleaning
956 - Jeff and Andres done in LVEA
1001 - Jason beginnning alignment work ITMY
1002 - Nathan turning on laser in OSB optics lab
1003 - Aaron powering down ISC chassis
1006 - HFD looking at RAFAR box
1016 - Jeff B working on contamination control in LVEA
1040 - Gerardo working in LVEA west bay
1056 - Karen done using emergency doors in LVEA
1124 - JimW to EX
1205 - Hugh running tests on HEPI EY, restarting EX
1220 - DaveB restarting SUSAUXEY for diagnostic purposes.
1247 - Aaron working on PSL AA chassis
1248 - Karen cleaning at Mid-Y
1309 - MattH, GaryT, DannyS, Stuart to EX to work on BSC9 closeout, prep for doorhang
1319 - Gerardo to West Bay to prep for electrostatic meas...may be accompanied by Norna and MikeL
1320 - Ken Watt doing electrical work in the LVEA
1343 - Jordan and Paul to EY
1440 - Jeff and Andres to EX
1548 - Nathan cease work in the optics lab

EndX HEPI Pump Station Sut down again

The Pump Station had only just recovered from shutdown Sunday July 13 and again shutdown on 17 July where it has remained.  The attached 20 day plot of Cartesian basis position Dofs shows the shutdown clearly after a few days of flat position loop control, the step to Pump off position for a couple days, a step to Pump on but HEPI not Isolated for a couple days and then another step back to Pump off period for the remainder.  The amount of shifting from Pump off to on is in the 10s of micro range.

The shutdown was due to the familiar OV3, overvoltage at constant speed.  EE tells me we could possibly put some inductor on the line to reduce this.

Anyway, no problem getting this back on, usual process.

Duty cycle of IMC during ER5

I'm looking at the performance of the IMC during ER5 (58.5 days spanning from Jan 15 12:00 - March 15 00:00 UTC) and thought I'd share some stats. I know it's only the IMC, but I think the numbers are quite good since work was continuing at the sites as normal. 

I'm looking at times during this period where the IMC ODC reports the IMC was in a good state. One reason we cared about the state of the IMC during ER5 is because we were using recoloured IMC-F data as GW data in our search pipelines. 

Below I've listed the percentage of time during this 58.5 day period where the IMC was 1) in a good state 2) in a good state for more than 60s 3) in a good state for more than 2048s. This last number corresponds to the length of data we need to run a CBC search. I've listed the time for LHO, LLO and Joint which means 2 detector coincidence (i.e. both were on at the same time). 

|  Segment Length (seconds) | LHO | LLO | Joint |
|          > 0              |89.1%|66.1%| 57.7% |
|          > 60             |88.8%|65.9%| 57.3% |
|          > 2048           |80.7%|63.4%| 50.2% |

Punchline - for ~50% of ER5 we had sufficient coincident IMC data to run a CBC search.

Sorry the table formatted fine as a draft, here it is in pdf

ETMX ISI unlocked

MattH told me this morning they were ready for releasing the ISI, so I went down to EX just before lunch. The ISI is now floating, I haven't looked at cps numbers yet, but my understanding is nothing was added/removed from the suspensions and the lockers all felt smooth. Will check numbers in a bit, and tf's after the quad is unlocked.

ITMY (QUAD) Phase 3a M0-M0 & R0-R0 TFs show potential rubbing on both chains

[Arnaud P, Betsy W, Jeff K, Norna R, Stuart A,]

Matlab TFs were taken last night for the top stages on both main and reaction chains of the ITMY (QUAD) suspension, as follows:-

- ITMY M0-M0 undamped (2014-07-28_1090624828_H1SUSITMY_M0_damp_OFF_ALL_TFs.pdf) 
- ITMY R0-R0 undamped (2014-07-28_1090642628_H1SUSITMY_R0_damp_OFF_ALL_TFs.pdf)

BSC1 ISI Status: ISI locked.

ITMY alignment: No offset was applied during this measurement.

The undamped TFs from above have been compared with the most recent set of 'good' measurements taken after IAS alignment and before being fully pay-loaded (allquads_2014-07-29_H1SUSITMY_Phase3a_Doff_ALL_ZOOMED_TFs.pdf).

Summary: 

It can be seen that a R mode at ~2.6 Hz cross-couples into both L and most significantly V DOFs. Furthermore, this occurs for both main and reaction chains, so investigating the UIM stage for signs of rubbing would be first port of call.

All data, scripts and plots have been committed to the sus svn as of this entry.

HAM3 - PR2 & MC2 (HSTS) M1-M1 Phase 3a TFs are clear (again)

[Stuart A, Arnaud P]

After the door was briefly removed from HAM3 to recover first contact from a witness optic (see LHO aLOG entry 12994) we repeated TFs again on PR2 & MC2 (HSTS) suspensions to verify that no issues had since developed, as follows:-

- PR2 M1-M1 undamped (2014-07-28_1090637500_H1SUSPR2_M1_damp_OFF_ALL_TFs.pdf) 
- MC2 M1-M1 undamped (2014-07-28_1090619695_H1SUSMC2_M1_damp_OFF_ALL_TFs.pdf)

HAM3 ISI Status: ISI damped, no isolation loops running.

PR2 & MC2 alignment: No offset was applied during this measurement.

The undamped measurements from above have been compared with each other as well as the model (allhstss_2014-07-29_Phase3a_H1HSTSs_M1_Doff_ALL_ZOOMED_TFs.pdf).

Summary: 

Both PR2 & MC2 M1-M1 TFs show good agreement with the model and perform consistently, thus raising no concerns.

All data, scripts and plots have been committed to the sus svn as of this entry.

CDS model and DAQ restart report, Monday 28th July 2014

no restarts reported

HAM2 - PR3 (HLTS) all stage Phase 3a Power Spectra are clear

A clean set of TFs were previously taken for all stages (M1, M2 & M3) of PR3 (HLTS) suspensions (see LHO aLOG entries 13017 & 13021), to complete Phase 3a power spectra have been taken with damping loops both ON and OFF for all stages. These power spectra measurements have been compared (allhltss_2014-07-28_Phase3a_H1HLTSs_ALL_Spectra_D*.pdf). The plot key is as follows:-

Black Dashed Line = Expected Sensor Noise
Blue Solid Line = H1SUSSR3 2014−07−24_1030
Green Solid Line = H1SUSPR3 2013−10−07_0800

Summary:

Noise floors for PR3 M1 & M2 stages are consistent with expectations. However, it should be noted that M3 channels exhibit some small excess noise features above 10 Hz, which is most likely due to purge air flow.

All data, scripts and plots have been committed to the sus svn as of this entry.

HAM3 MC2 PR2 lower stages tfs results

Lower stages transfer functions of HAM3 suspensions (MC2 - PR2) succesfully completed over the week end and were processed today. They match very well model and previous measurements. One interesting feature is worth noticing though : the M3-M3 tfs of PR2 (Long Pitch and Yaw) (see 4th attachment) shows a high Q resonance at 45Hz, which is certainly not mechanical, but might be related to the 'turn-up' seen with other osems.
A quick dtt tf was taken, driving the L channel, confirming the presence of the feature. It also shows up with coil driver in state 1 and state 2. The attached dtt screenshot shows that the feature comes from the LR channel. More investigation will be done tomorrow.

The tfs results are presented in the attachments as follow :

1. H1 MC2 M2-M2 undamped tfs compared with model
2. H1 MC2 M3-M3 undamped tfs compared with model
3. H1 PR2 M2-M2 undamped tfs compared with model
4. H1 PR2 M3-M3 undamped tfs compared with model
5. H1 PR2 / MC2 M2-M2 tfs compared with previous in chamber, in vacuum measurements
6. H1 PR2 / MC2 M3-M3 tfs compared with previous in chamber, in vacuum measurements

Data and scripts were commited to the svn

ETMx closeout work started

Danny S, Gary T, Matt H

We began the closeout of the X-end station today. The Quad was locked down and the baffle swung back and kept in place using the wedge. Using the green light the number of particulates on the HR surface was estimated to be in the teens per square inch. We noticed that there was already a 1" monitor optic and a 4" wafer in place. We dont know if these should of been removed straight after the vent, or have been placed there to monitor activity during the vent. But we have left them be for now

Gerado also asked us to inspect the 4 viewports in that chamber if we could whilst inside the chamber. There is a potential issue with the middle viewport on the eastern door (looks like imprint of peek mesh I am told)...but Danny believes its on the outside, so should look at it more indepth. The others look fine

A new wipe was put on the cone and the cone put on the HR surface of the Quad. With the cone butted up against the optic there was plenty of room to fit between the cone and the baffle. Danny when he sprayed used the "shroud" technique that we use at LLO to stop any potential backspray of FC (you can see it in one of the pics). He reported not seeing any of the spiderwebbing effects we saw in the corner station FCing. The FC mixture for spraying was the standard 1:1.

After allowing FC to dry an outer crust was painted on the HR surface of the Test mass optic. Calum informed me that we could paint the ERM surface and so we put 2 layers (and outer crust) on the ERM surface also. Peek tabs painted onto both optics

 

Next up...a good deep clean of the chamber

 

Pics are of Gary and Danny during various steps of FC process (I was outside support today :-))

HAM2 - MC1, MC3 & PRM (HSTS) all stage Phase 3a Power Spectra are clear

A clean set of TFs were previously taken for all stages (M1, M2 & M3) of MC1, MC3 & PRM (HSTS) suspensions (see LHO aLOG entries 12974 & 13019), to complete Phase 3a power spectra have been taken with damping loops both ON and OFF for all stages. These power spectra measurements have also been directly compared (allhstss_2014-07_28_Phase3a_H1HSTSs_ALL_Spectra_D*.pdf). The plot key is as follows:-

Black Dashed Line = Expected Sensor Noise
Blue Solid Line = H1SUSMC1 2014−07−28_1200
Green Solid Line = H1SUSMC3 2014−07−28_1300
Red Solid Line =H1SUSPRM 2014−07−28_1400

Summary:

Noise floors for MC1, MC3 & PRM are consistent with expectations. However, it should be noted that both MC3 & PRM M1 LF & RT channels exhibit excess noise around 10 Hz, which is most likely due to purge air flow.

All data, scripts and plots have been committed to the sus svn as of this entry.

ITMY Arm Cavity Baffle photodiodes

Tested the forward voltage for the ACB photo diodes. 
BSC1 Flange F1-3C1 (air side).

Pin 1&2
PD forward voltage: 0.412V

Pin 4&5
PD forward voltage: 0.428V

Pin 7&8
PD forward voltage: 0.422V

Pin 10&11
PD forward voltage: 0.428V

All results within spec.

Filiberto Clara

itmy tfs running overnight on opsws1

~1500 hrs. local -> Stopped baking RGA mounted at port X1-9 in the X-mid

Ops Summary

LVEA laser safe

08:55  Aaron – Going to End-X and to End-Y to check noise eater switch
09:01 Mitch – In LVEA working on ACB installation
09:13 Matt, Danny, & Gary – In LVEA gathering up tools for End-X close out
09:15 Manny – In LVEA to survey kill switches
09:33 Doug & Jason – ACB alignment Y-Arm 
09:34 Nathan – Laser work in Optics lab
09:40 Apollo – Pulling North door on HAM6 to pull leak check bung
10:08 Mike – Taking tour into LVEA
10:15 Andres – In the LVEA cleaning area working on contamination control assembly
10:30 Gerardo & Joe - Going to End-X for viewport survey
10:39 Matt, Danny, & Gary – Going to End-X to prep for chamber close out
11:18 Notified Kyle of alarm on IP-05
12:36 Test of Hanford emergency alert system
13:00 Filiberto & Manny – End-Y to pull PEM cables
13:10 Mitch & Travis – In LVEA for Y-Arm ACB installation work
13:31 Justin – End-X and End-Y for laser survey
13:37 Betsy – Working in Beer Garden to prep for BSC closeout
13:50 Gerardo – In LVEA west bay working on ionization experiment 
13:52 Paul & Jordan – Going to End-Y to take PEM measurements
14:34 Matt, Danny, & Gary – At End-X preparing for chamber close
15:50 Filiberto - Checking ACB photo diode 

HAM2 - MC1, MC3 & PRM (HSTS) M2-M2 & M3-M3 (lower stage) Phase 3a TFs are clear

After obtaining clear M1-M1 (top-top) TFs for HAM2 suspensions over the weekend (see LHO aLOG entry 12974), I've now processed data for lower stages as follows:-  

- MC1 M2-M2 undamped (2014-07-27_1090556791_H1SUSMC1_M2_damp_OFF_ALL_TFs.pdf)
- MC3 M2-M2 undamped (2014-07-26_1090419127_H1SUSMC3_M2_damp_OFF_ALL_TFs.pdf)
- PRM M2-M2 undamped (2014-07-26_1090421241_H1SUSPRM_M2_damp_OFF_ALL_TFs.pdf)

- MC1 M3-M3 undamped (2014-07-27_1090565498_H1SUSMC1_M3_damp_OFF_ALL_TFs.pdf)
- MC3 M3-M3 undamped (2014-07-26_1090427890_H1SUSMC3_M3_damp_OFF_ALL_TFs.pdf)
- PRM M3-M3 undamped (2014-07-28_1090609009_H1SUSPRM_M3_damp_OFF_ALL_TFs.pdf)

HAM2 ISI Status: ISI unlocked, ST1 damped, no isolation loops running.

MC1, MC3 & PRM alignment: No offset was applied during this measurement.

The undamped measurements from above, for each stage, have been compared with each other and the model (allhstss_2014-07-28_Phase3a_H1HSTSs_M2_Doff_ALL_ZOOMED_TFs.pdf and allhstss_2014-07-28_Phase3a_H1HSTSs_M3_Doff_ALL_ZOOMED_TFs.pdf).

Summary: 

M2-M2 TFs, show good agreement with the model and are consistent between H1 HSTS suspensions. However, the P DOF exhibits a feature at ~2 Hz present for both MC3 and to a much larger extent PRM. I suspected this to be an artifact of the measurement, therefore, I manually repeated the P DOF TF in DTT, which verified there were no issues with the suspension (see PRM_M2_P_DOF.png below).

M3-M3 TFs, again, these show good agreement with the model and are consistent between H1 HSTS suspensions, thus alleviating any concerns of rubbing.

All data, scripts and plots have been committed to the sus svn as of this entry.

H1SUSITMY Reaction Chain TFs Cleared after IAS

J. Kissel

Betsy, Travis, and Jason have finished initial alignment of the Reaction Chain on H1 SUS ITMY. Over lunch, I've run a set of DTT transfer functions to confirm we're not rubbing in a way that would affect the IAS assessment. The TFs reveal the chain is free as a bird, so the IAS numbers are legit. Nice work, team!

They're beginning to "payload" the SUS now (add the stiffening sleeve, vibration absorbers, etc.), and we'll take a full set of TFs again tonight, including the Main Chain to confirm all is well.

All scripts and data have been committed to the svn.

Standing of chambers at this stage

Kate G, Calum T, Rich A, Matt H

First of all a BIG/MASSIVE/ENORMOUS thankyou to Calum, Kate and Rich for putting up with a slave driver like me and working a 12 hour shift with me on a saturday

 

Standing of chambers at the moment as I remember it:

HAM2

PRM..locked…however still need to lock optic barrel stops and remove front optic EQ stops..then ready for FC

PRM baffle…removed

PR3..locked. Ready for FC

MC3..locked…however still need to lock optic barrel stops and remove front optic EQ stops..then ready for FC

MC1..partially locked

Kapton washers not installed on picomotors yet

ISI…locked

 

HAM3

MC2…FC applied and unlocked

PR2….FC applied and unlocked

Large Kapton washers installed on all picomotors

ISI…unlocked

Covers pulled back from ISI

Coarse wipe down of chamber has occurred

 

BSC2

Beamsplitter optic…locked

ISI…locked

First contact applied to optic...still need to paint "crust"

New baffle installed

Old baffle needs to be reinstalled after FC pulled

Chamber wipe down occurred

 

HAM4

SR2..locked…however still need to lock optic barrel stops and remove front optic EQ stops..then ready for FC

TCS optic in front of SR2 optic removed

ISI…locked

 

 

HAM5

Faraday..unlocked

ISI…locked

SRM…locked…no FC will be applied

SR3…locked. Spray FC applied, need to paint edges

SR3 front baffle removed

Chamber wipe down occurred

 

BSC3

Suspension..locked

FC applied to optic…..still needs outer crust applied I believe

Arm cavity baffle still pulled back I believe.

 

Particle counts

HAM4

In cleanroom start of arvo session

All counts zero

 

In chamber start of arvo session

0.3um...210 counts

0.5um...80 counts

0.7um...30 counts

1.0um...30 counts

2.0um ...10 counts

5.0 um....0 counts

Probably high due to baffle work

Pics attached if people interested in RH/temp

 

Focus of tomorrow is to try to finish HAM4 and HAM5, maybe finish BSC3 and BSC2 first contacting, and do some more work in HAM2. See how we go