david.barker@LIGO.ORG - posted 10:03, Thursday 26 June 2014 (12492)
CDS model and DAQ restart report, Wednesday 25th June 2014
no restarts reported.
no restarts reported.
As Hugh mentioned in his alog here we used the HEPI RZ position loop to align the yaw to it's current value. Today we will begin work on ITMx pitch and CPx pitch/yaw.
- SUS needs to do pitch work on ITMX
- Higher dust counts recorded on ITMX (~1000's) than HAM chambers (~10's), this is due to too many volumes open at the same time in the LVEA.
- ISS work on going in HAM2, beam was blocked at MC1 and MC3 for redundant protection.
- Sheila and Kiwamu are preparing for beam splitter install at HAM3
- Jason is going to do a shot and prepare for HWS alignment from the ITMX spool
- Calum and Kate are going to walk about the End stations
- Corey is going to take pictures of the LVEA from the manlift
Particle Counts were taken in BSC3 before and during work activity on the ITM quad. Counts were very high, see below. Work continued because the ITM will be cleaned again before close and because of pressing needs from other groups. Refer to LIGO-T1400024-v4 (https://dcc.ligo.org/LIGO-T1400024) for guidance on particle counts. Would like to see push and draw cross-flow system setup at BSC3. start of work (2 bodies in chamber, no work) 0.3 um 1020 1.0 um 160 5 minutes after above (same 2 bodies, no work) 0.3 um 964 1.0 um 174 5 minutes after above (same 2 bodies, no work) 0.3 um 560 1.0 um 80 5-10 minutes after above (same 2 bodies, no work) 0.3 um 380 1.0 um 50 5 minutes later (same 2 bodies, with some "walking" in chamber) 0.3 um 540 1.0 um 120 5 minutes later (prep for sleeve removal, now 3 bodies) 0.3 um 780 1.0 um 190 5 minutes later (after sleeve removed, now 3 bodies) 0.3 um 1270 1.0 um 210
Because the Hartman WFS alignment was going to need the ITMx optics free of FirstContact, we pulled it yesterday. However, we first re-re-removed the QUAD sleeve structure and the 4 vibration absorbers which are in the way of the pitch alignment due to take place today. Also prior to removing the FC, we also found high particle counts in the ITMx chamber. Hugh played around with purge (again) and we closed up the small IAS window at the spool. This seemed to improve things a bit. After taking data on particle counts for a while, we proceeded to pull the FC anyways knowing that we'll have to reclean the optic befor chamber close up.
This afternoon I upgraded the guardian core to r1020, and cdsutils to r250. There are a couple important new guardian features that I wanted to pull in:
I then restarted all nodes with "guardctrl restart --all". All SUS nodes had been shut down for the moment, and all SEI nodes are in watchdog trip states, so this didn't do too much. Some nodes that don't specify initial request states came up with the new NONE request. I set manually reset the requests for those nodes back to what they were before the restart. No major issues:
node s m n vers request state message
---- - - - ---- ------- ----- -------
ALS_COMM * E ! 1020 DOWN DOWN not ready for handoff
ALS_DIFF * E - 1020 DOWN DOWN -
ALS_XARM * E - 1020 UNLOCKED UNLOCKED -
ALS_YARM * E - 1020 UNLOCKED UNLOCKED -
H1ECATC1PLC2 * E - 1020 OP OP -
H1ECATX1PLC2 * E - 1020 OP OP -
H1ECATY1PLC2 * E - 1020 OP OP -
H1ISCEX * E - 1020 OP OP -
H1ISCEY * E - 1020 OP OP -
H1LSC * E - 1020 OP OP -
H1LSCAUX * E - 1020 OP OP -
HPI_BS * E ! 1020 ROBUST_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
HPI_ETMX * M - 1020 ROBUST_ISOLATED ROBUST_ISOLATED -
HPI_ETMY * M - 1020 ROBUST_ISOLATED ROBUST_ISOLATED -
HPI_HAM2 * E ! 1020 ROBUST_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
HPI_HAM3 * E ! 1020 ROBUST_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
HPI_ITMX * E ! 1020 ROBUST_ISOLATED WATCHDOG_TRIPPED_DAMPING WATCHDOG TRIP: DAMPING_ONLY (3)
HPI_ITMY * M ! 1020 ROBUST_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
IMC * E ! 1020 DOWN FAULT PSL periscope PD error (low light?)
ISI_BS_ST1 * E ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
ISI_BS_ST2 * E ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
ISI_ETMX_ST1 * M - 1020 HIGH_ISOLATED HIGH_ISOLATED -
ISI_ETMX_ST2 * M - 1020 HIGH_ISOLATED HIGH_ISOLATED -
ISI_ETMY_ST1 * M - 1020 HIGH_ISOLATED HIGH_ISOLATED -
ISI_ETMY_ST2 * M - 1020 HIGH_ISOLATED HIGH_ISOLATED -
ISI_HAM2 * E ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
ISI_HAM3 * E ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
ISI_HAM4 o - - - - - -
ISI_HAM5 o - - - - - -
ISI_HAM6 o - - - - - -
ISI_ITMX_ST1 * E ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
ISI_ITMX_ST2 * E ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
ISI_ITMY_ST1 * M - 1020 HIGH_ISOLATED DAMPED -
ISI_ITMY_ST2 * M ! 1020 HIGH_ISOLATED WATCHDOG_TRIPPED_FULL_SHUTDOWN WATCHDOG TRIP: FULL_SHUTDOWN (4)
LSC * E - 1020 NONE INIT -
SEI_BS * E ! 1020 ISOLATED_DAMPED WATCHDOG_TRIPPED_DACKILL WATCHDOG TRIP: DACKILL
SEI_ETMX * E - 1020 FULLY_ISOLATED FULLY_ISOLATED -
SEI_ETMY * E - 1020 FULLY_ISOLATED FULLY_ISOLATED -
SEI_HAM2 * E ! 1020 ISOLATED WATCHDOG_TRIPPED_DACKILL WATCHDOG TRIP: DACKILL
SEI_HAM3 * E ! 1020 ISOLATED WATCHDOG_TRIPPED_DACKILL WATCHDOG TRIP: DACKILL
SEI_ITMX * E ! 1020 FULLY_ISOLATED WATCHDOG_TRIPPED_DACKILL WATCHDOG TRIP: DACKILL
SEI_ITMY * E ! 1020 FULLY_ISOLATED WATCHDOG_TRIPPED_SUBORDINATE WATCHDOG TRIP: SUBORDINATE
SUS_BS o - - - - - -
SUS_ETMX o - - - - - -
SUS_ETMY o - - - - - -
SUS_ITMX o - - - - - -
SUS_ITMY o - - - - - -
SUS_MC1 o - - - - - -
SUS_MC2 o - - - - - -
SUS_MC3 o - - - - - -
SUS_OMC o - - - - - -
SUS_PR2 o - - - - - -
SUS_PR3 o - - - - - -
SUS_PRM o - - - - - -
SUS_SR2 o - - - - - -
SUS_SR3 o - - - - - -
SUS_SRM * E - 1020 DAMPED DAMPED -
SUS_TMSX o - - - - - -
SUS_TMSY o - - - - - -
added 46, removed 75, 228 unmonitored (see attached)
9:00 am Jim W to CS VEA, work on HAM4 ISI, and removal of septum blank.
9:15 am Corey, Matt and Volker to CS VEA, HAM2 ISS PD array related work.
9:30 am Apollo to CS VEA, aide with removal of septum blank, removal of North door at HAM4 and removal of temporary septum at HAM4|BSC2.
10:00 am Filiberto and Aaron to CS VEA, HAM5/6 area cable pulling work.
10:30 am Jeff B to CS VEA, contamination control related work by HAM4 area, dust monitor.
11:00 am Added 300 ml of water to H1-PSL chiller.
12:47 pm Travis to CS VEA, work on ITMX alignment.
12:54 pm Betsy, Calum and Kate to CS VEA, join Travis for ITMX alignment work and "green" light related work.
12:55 pm Jeff B to CS VEA, contamination control related work by or in the beer garden.
1:18 pm Thomas to CS VEA, inventory of parts.
1:56 pm Volker, Corey and Matt go back to CS VEA, HAM2 work.
3:09 pm Jeff B to CS VEA, contamination control investigation around HAM5/6, during cable pulling event.
3:10 pm Rick S to CS VEA, setting H1 laser enclosure to science mode. NOTE: Rick reports an odd smell inside the H1 PSL laser enclosure.
North door on ham 4 was removed. Jim W. went in and removed the blank from ham 4/ bsc 2 septum. Afterwards we removed the septum and recoupled ham 4 to the adapter spool.
Find attached the notes from the adjustments to HEPI in response to IAS.
Also see the Auto Optical Level observations showing the level of the ISI Optical Table (<0.007" runout (+-0.0035) on OT) is well within spec.
Before reattaching the Actuators we got the ITMX into position with HEPI. We were ?? X 0.2mm +Y, 0.0 Z, 30urad RZ.
After attaching the Actuators the RZ shifted to -80urads. The DIs are almost useless at this level and a slight bump on the HEPI can shift it at this scale it seems. So I've just used the RZ position loop to hold this. We've got a 70urad target in the ITMX RZ CART BIAS Loop; this holds the IAS yaw to <10urads.
While we were at it, we slapped a few more cart bias numbers in (could use a few more to larger values) to check the IPS cartesian calibration--Looks pretty good but like I said, a few more larger numbers would be informative. There may be some divergence at the extremes of this data. Attached below is a graph of IPS location values and IAS collimating LASER readouts.
IP6 hasn't been pumping since ~06/15/2014 -> Found controller energized but HV off -> Corrected and OK now
We surmise the noisy loops are because we need fresh transfer functions because we shifted the plant: We lowered the HEPI 3+ mm as well as moved a mm laterally. This displaces the SEI Expansion Bellows (Vacuum Seal) and changes the plant resistances. Another reason for the noisy loops, y mainly, may be due to the cleanroom sheets impacting the y motion. Jim also thinks the locked ISI may be altering the plant too much.
I ran Local Range of Motion tests on HEPI and have no problem achieving 0.8mm. The linearity test however looks strange which actually displaces about half as much as the ROM test--see attached. The Verticals look really good but the horizontals suggest some issues. There are no historic linearity plots from ITMX to compare, too bad. My strongest suspision is the cleanroom and I'll stick with that until it can be ruled out before I think about changing HEPI Parker Valves.
Here is the Matlab output from the Range of Motion Test:
There is a range of motion of 0.0008M on
ans =
'Neg H1'
'Pos H1'
'Neg H2'
'Pos H2'
'Neg H3'
'Pos H3'
'Neg H4'
'Pos H4'
'Neg V1'
'Pos V1'
'Neg V2'
'Pos V2'
'Neg V3'
'Pos V3'
'Neg V4'
'Pos V4'
Short Range of motion on:
ans =
Empty cell array: 0-by-1
[Betsy Arnaud]
This morning we took quick dtt transfer functions on the 6 dofs of ITMx, to check for obvious rubbing : the quad seems to be hanging freely.
dtt templates are saved and commited under the svn :
/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMX/SAGM0/Data/2014-19-06_1000H1SUSITMX_M0_WhiteNoise_${DOF}.xml
no restarts reported.
As reported yesterday, EQ stops of the intermediate mass for all MC suspensions looked really close. Attached shows two EQ stops for MC3, and one of them was very close though it was not touching. Other mirrors looked similar to me. These are all with MC mirrors already aligned, while the EQ stops are typically set without suspension biases.
I asked Betsy and Travis to have a look. They went in, said that MC1 was OK but they backed off some screws for MC2 and 3.
I've finished terminating and testing the Cat6A runs at EX and EY for the cameras and the field rack. The vacuum rack side of the runs is also terminated, but I am waiting for the appropriate shielded/grounded patch panel to finalize what's installed. In the meantime, exercise some caution around these cables if working in the vacuum rack.
IMC was bypassed.
Right now the IMC is aligned and is flashing with a wrong polarization, and the rerouted MC_REFL beam is on top of the MC transmission but with different polarization. MC transmission is all rejected by Faraday, and only a part of rerouted MC_REFL beam comes out of Faraday, but that beam is strong enough we can see the IM4 transmission all the way down to the ISS diode array.
Details to follow, but anyway conclusion is that HAM2 is ready for ISS diode array work.
PSL and IMC alignment:
At first we couldn't use PZT mirror on the PSL periscope for YAW at all. It turns out that the cables were disconnected and then a wrong cable was connected a few weeks ago. The correct cable was connected back and it was fine.
We followed Cheryl's instruction to install IMC irises to the correct location (see attached for MC1, MC2 and MC3).
Used PZT mirror to direct the beam to the center of MC2 iris, and MC1 iris was fine without doing anything.
Tweaked MC2 to bring the beam to the center of MC3 iris, and IMC started flashing immediately with occational 00 mode without touching MC1.
There was no point spending too much time on tweaking the alignment as this is in-air, so we tweaked only MC3 and stopped when the flashing became mainly of 00, 01 and 02 mode (in YAW).
The flashing light was going into Faraday, and all light was immediately rejected by Faraday (because we were injecting a wrong polarization).
Bypassing IMC:
We installed two temporary mirrors (dirty mounts wiped as good as can be done, iLIGO H2 POP periscope optics, on top of class A base plates) in the MC_REFL path, and directed that beam to MC3 such that the direct reflection off of the MC3 becomes colinear with the flashing. This is Chris-Rodica method in T1300327.
IM1, 2, 3 and 4 were all damped and the offset values were put back.
One person looks at the beams right after MC3, and the other person looks at the beams in front of IM2, and we iterated until we weren't sure if we were making things any better.
Both the MC transmission and rerouted MC REFL went into the Faraday input aperture, only the latter came out (because of the crappy polarization of the latter due to geometric rotation, which works for us in this case).
At this point, we were already able to see the IM4 transmission. Compared with the mark on the wall that Sheila made back in May, YAW was almost good, PIT was not. A small YAW adjustment was made using IM3.
Then we went back to IM1 to center on IM2 (did nothing because it was good), IM2 to center on Faraday output baffle (only adjusted PIT, YAW looked a bit off but OK), then IM to bring the IM4 transmission on the wall back to where it used to be, and after that the beam looked quite well centered on IM4.
We damped PRM, put back the old offset and the IFO REFL beam was on the REFL beam baffle. Since this depends on IM4 angle and PRM angle and since it's a big job to check the angle of IM4, we decided that at this point it was good enough to confirm that the REFL beam clears the REFL baffle hole cleanly with a minor PRM tweaking.
IM4 transmission was going to IM4 trans QPD, however the signal was so small that all we could do is to confirm that the SUM changed when we blocked the beam.
Then we confirmed that the IM4 transmission goes to the pico mirror for the ISS array, reflected and goes to the ISS array.
We need to check the PSL beam mark on the wall, because when the mark was made yesterday by Sheila and Volker, the PZT was not working for YAW.
On Thursday 26th June (following these counts being raised at the morning LHO meeting Bubba et al set up the draw fan on the BSC3 door (opening) as per the attached picture, DSCN0367.jpg. Following the installation of the draw fan I went back to take readings in and around WBSC3. The readings were as follows: - 1) In clean-room outside WBSC3/1 (in middle of room). 0.3 um 50 1.0 um 20 2) In clean-room outside WBSC3/1 (adjacent to draw fan). 0.3 um 10 1.0 um 0 3) In clean-room (in front of draw fan). 0.3 um 150 1.0 um 30 4) In WBSC3 (at opening). 0.3 um 80 1.0 um 10 5) In WBSC3 (just inside chamber). 0.3 um 170 1.0 um 40 6) In WBSC3 (above open flooring, below ITM). 0.3 um 260 1.0 um 70 Clearly the installation of the draw fan has made a marked improvement. However, more measurements are required to confirm this in the longer term. Refer to alog entry https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=12529 for follow up reading taken on the 30th June 2014. ACTION - At next opportunity i.e. when optic can be protected by lens cap the floor (of the chamber) and the flooring should be wiped and vacuumed. Jeff Bartlett has this on his to do list.