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
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
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.
ISI is damped
PSL Status: SysStat: Green Output power: 36.2w Frontend Watch: Good HPO Watch: Red PMC: Locked: 4 days, 4 hours Reflected power: 4.3w Power Transmitted: 21.4w Total Power: 25.7w FSS: Locked: 4 days, 4 hours Trans PD: 0.53v ISS: Diffracted power: 7.535% Last saturation event: 3 days
Transfer functions of the lower stages of PR3 (HAM2) have been measured over the week end, with the sus undamped and the ISI damped.
M2-M2 tfs are showing good agreement with model and previous measurements (except for unexpected resonance at 0.97Hz in the L-L tf)
M3-M3 L-L is ok. P-P has a factor of 4 discrepancy with the model (similar pb as with SR3, which I thought I fixed but apparently not. I resaved a safe.snap with corrected EUL2OSEM matrix). Y-Y shows signs of couplings.
To note : The amplitude of excitation was too large, since the dac saturated for both M2 and M3 measurements (cf screenshot). I modified the drive parameters file "/ligo/svncommon/SusSVN/sus/trunk/Common/MatlabTools/SchroederPhaseTools/TFSettingsLHOHLTS", which should have correct gains from now.
The results are presented in the attachments :
1. H1 PR3 M2-M2 undamped tfs (green) compared with the model (blue)
2. H1 PR3 M2-M2 undamped tfs (pink) compared with undamped tf (in vacuum) from July last year (orange)
3. H1 PR3 M3-M3 undamped tfs (green) compared with model (blue)
4. H1 PR3 M3-M3 undamped tfs (pink) compared with H1 SR3 (cyan) (in chamber, in air, ISI locked) and L1 SR3 (in chamber, under vacuum, ISI isolated)
Data, scripts and safe.snap were commited under the svn
PR3 M1-M1 transfer functions ran over the week end after HAM2 closeout last friday are showing good agreement with the model and previous in vacuum measurements.
The results are presented in the attached pdf :
1. H1 PR3 in (closed) chamber, in air, ISI damped, M1-M1 undamped TFs (green) compared with the model (blue).
2. H1 PR3 in (closed) chamber, in air, ISI damped, M1-M1 undamped TFs (black) compared with in vacuum measurements from sept 2013 with ISI isolated (orange curve).
I have added CAL buttons to the sitemap. PCALX is attached to the EX button, EY and CS are placeholders.
After securing doors on HAM2 (see LHO aLOG entry 12995), TFs have been taken over the weekend as part of Phase 3a testing to check for rubbing or other issues that may have developed as follows:- - MC1 M1-M1 undamped (2014-07-27_1090539018_H1SUSMC1_M1_damp_OFF_ALL_TFs.pdf) - MC3 M1-M1 undamped (2014-07-26_1090401593_H1SUSMC3_M1_damp_OFF_ALL_TFs.pdf) - PRM M1-M1 undamped (2014-07-26_1090403653_H1SUSPRM_M1_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 have been compared with each other and the model (allhstss_2014-07-28_Phase3a_H1HSTSs_M1_Doff_ALL_ZOOMED_TFs.pdf). Summary: MC1, MC3 & PRM show good agreement with the model and perform consistently, thus raising no concerns of rubbing. Now need to check lower stage TFs and take power spectra. All data, scripts and plots have been committed to the sus svn as of this entry.
BSC1:
Installation and alignment work on ACB
Final IAS check on ITMY
Mitch doing prep work for ACB installation
Filiberto testing the photo diodes
BSC2/BSC3:
Jim BSC2 problem are fixed and TFs are good
Jim is testing BSC3
SUS ready for final close out activities
TCS alignment needs to be checked
End-X:
Will try to close BSC9 this week
LLO crew working on close out prep and cleaning
HAM6:
Plan to open on Tuesday or Wednesday
Electrical:
Cable checkout at HAM6
Prep work for high voltage work for PSL
Gerardo:
Viewport readiness survey
no restarts reported.
no restarts reported.
Patrick and Dave
at 14:52PDT cdsfs0 (file server for /ligo) encountered a error. All workstations are frozen due to loss of /ligo.
We are rebooting to see if we can bring it back.
/ligo file system is back. I tried to remotely power cdsfs0 down, but it got stuck in the process. Patrick powered it down using the front panel button, then powered it up. It did not do an automatic fsck and rebooted quickly. All systems appear to have reconnected to the file system seamlessly.
I checked the vacuum alarms to cell phones and MEDM screens to web are working. I verified the DAQ was unaffected. Patrick says the workstations in the control room became unstuck without any reboots needed. Some workstations are locked out by users and may have been running transfer functions, Patrick is emailing the relevant commissioners to check their TFs.
The Hanford Fire Dept will be on sight doing some fire hydrant flow measurements. Should be done around noon.
Hanford Fire is done testing Hydrants for the day. Thank you Mike Pedraza for shutting off the Pumps for me. They could not test Hydrant 11 still out of service due to leak nor Hydrant 7 which has a broken valve.
model restarts logged for Fri 25/Jul/2014
2014_07_25 10:25 h1odcx
2014_07_25 13:56 h1odcx
no unexpected restarts. PCAL work at EX.