Purged Unit 7 in its storage container with LN2 boil off from a dewar. Used 5 Liters per Minute flow rate this time and the differences can be seen in the attached chart. I would like to try and find the minimum flow rate needed to maintain a -35 to -40 tdºC dew point level, but I may need to get a lower flow rotameter.
We are ready to remove the West door from HAM1 and build the isolation stack there. There will be some competing needs of crane and forklift with the Apollo crew moving the cleanrooms in & out of the South bay so progress may not be as rapid as possible.
Attached are plots of dust counts > .5 microns in particles per cubic foot.
The ISS was cycling between about 0 and 20% diffracted power. I disabled it for now. With Alberto Stochino, we installed two turning mirrors in the PSL RefCav transmitted light pickoff path in preparation for installation of the coupling optics for the fiber for the single-arm test. We will continue with this effort tomorrow.
cleaning HAM 1 CP 5, 6 filled Filiberto to mid Y to look for electronics chassis. Betsy to work on MC1. Apollo to begin craning of short sided clean room from South bay to BSC8, and relocate clean room from HAM4 to HAM3. Kyle replacing ion pump on GV16. Eric putting bellow shields on HEPI actuators. Dave and Jim to end Y to look at HEPI pump controller, power cycled pump controller.
This afternoon, the CDS group encountered some difficulties to connect to the servo controller computer at EY. At that point, the controller and the pump were still running. Only the display was frozen. When they rebooted the computer, the pump stopped. The HEPI pump at EY was restarted around 4:20 pm. The HEPI came back close to its previous nominal position.
Today we moved WFS2 back to its original position and moved the second lens after the steering mirror. The combination without a second lens gave a beam too small. The new measured alignment matrix is
Sensing matrix for PIT was:
WFSA = +0.411*POS -5.483*ANG
WFSB = +1.269*POS - 3.783*ANG
Sensing matrix for YAW was:
WFSA = +0.036*POS + 1.962*ANG
WFSB =-0.431*POS + 3.265*ANG
The inverse matrices are:
PIT={{-0.7002, +1.0148}, {-0.2349, +0.0761}}
YAW={{+3.3830, -2.0329}, {+0.4476, +0.0373}}
Decent matrix with too small a beam >> Hopeless matrix with a decent size beam.
Christina and crew cleaned at HAM1/2 twice today in preparation for door removal by the SEI crew. Hugh has five HAM door covers to use as needed. An additional six HAM door covers are on the shelf and at least six more are in the laundry queue. Bubba and crew removed the short-sided cleanroom from over HAM3 and placed it next to BSC8.
Douglas Daniel, Joe DeRenzis, Thomas Vo We finished assembling two D1101714, High Quality Wedged 6in Viewport assemblies (double optic). This is the first few articles of this particular assembly and pictures are attached, proof testing and leak testing to be done tomorrow (awaiting test parts from C&B). One of these assemblies is meant to be installed on HAM1 for the main PSL laser beam, we hope to be ready to connect the light tube this week.
Note the new jig designed and fabricated by Tyler for holding these viewports during inspection.
Modifications to the QUAD L1 (UIM) and L2 (PUM) stage CoilOutF filter banks were made via Foton to reflect the latest State Machine Diagrams updated last week. The changes were saved to the filter text files, and filter coefficients were loaded via the "*_GDS_TP" medm. The Foton filter text files were committed locally to the "cds_user_apps" Repository checked out under: '/opt/rtcds/userapps/release/sus/h2/filterfiles/H2SUS*TMY.txt'
For each of the four L2 (PUM) stage Coil Output Filter banks, the differences in the Foton text file are as follows: Previously (before 08/31/2012): ################################################################################ ### ITMY_L2_COILOUTF_LL ### ################################################################################ # DESIGN ITMY_L2_COILOUTF_LL 0 zpk([129.973],[13],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 1 zpk([99.9877],[1],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 2 zpk([5;19.9999],[0.5;249.809],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 5 zpk([13],[129.973],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 6 zpk([1],[99.9877],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 7 zpk([0.5;249.809],[5;19.9999],1,"n") ### ### ITMY_L2_COILOUTF_LL 0 21 1 0 0 SimAcqOffL2 0.1022381444281 -0.9950269485578308 0.0000000000000000 -0.9513581602053965 0.0000000000000000 ITMY_L2_COILOUTF_LL 1 21 1 0 0 SimAcqOnL2 0.01018979855460631 -0.9996165783185160 0.0000000000000000 -0.9623720057438665 0.0000000000000000 ITMY_L2_COILOUTF_LL 2 21 1 0 0 SimLPL2 1.198428225279573 -1.9083200482101859 0.9083375891754886 -1.9904437581736589 0.9904583948159983 ITMY_L2_COILOUTF_LL 5 21 1 0 0 AntiAcqOffL2 9.781085186882086 -0.9513581602053965 0.0000000000000000 -0.9950269485578308 0.0000000000000000 ITMY_L2_COILOUTF_LL 6 21 1 0 0 AntiAcqOnL2 98.13736695981576 -0.9623720057438665 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ITMY_L2_COILOUTF_LL 7 21 1 0 0 AntiLPL2 0.8344262751043912 -1.9904437581736589 0.9904583948159983 -1.9083200482101859 0.9083375891754886 ################################################################################ Currently (as of 09/04/2012): ################################################################################ ### ITMY_L2_COILOUTF_LL ### ################################################################################ # DESIGN ITMY_L2_COILOUTF_LL 0 zpk([12],[110],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 1 zpk([1.35],[80.5],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 2 zpk([6;20],[0.5;250],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 5 zpk([110],[12],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 6 zpk([80.5],[1.35],1,"n") # DESIGN ITMY_L2_COILOUTF_LL 7 zpk([0.5;250],[6;20],1,"n") ### ### ITMY_L2_COILOUTF_LL 0 21 1 0 0 SimAcqOffL2 8.999262730598492 -0.9586809127066087 0.0000000000000000 -0.9954086141798147 0.0000000000000000 ITMY_L2_COILOUTF_LL 1 21 1 0 0 SimAcqOnL2 58.74299131244113 -0.9695955355155262 0.0000000000000000 -0.9994824154540793 0.0000000000000000 ITMY_L2_COILOUTF_LL 2 21 1 0 0 SimLPL2 0.9996062717429675 -1.9082531975983987 0.9082707513809170 -1.9900610320883918 0.9900785927850526 ITMY_L2_COILOUTF_LL 5 21 1 0 0 AntiAcqOffL2 0.1111202139481815 -0.9954086141798147 0.0000000000000000 -0.9586809127066087 0.0000000000000000 ITMY_L2_COILOUTF_LL 6 21 1 0 0 AntiAcqOnL2 0.01702330742200748 -0.9994824154540793 0.0000000000000000 -0.9695955355155262 0.0000000000000000 ITMY_L2_COILOUTF_LL 7 21 1 0 0 AntiLPL2 1.000393883340034 -1.9900610320883918 0.9900785927850526 -1.9082531975983987 0.9082707513809170 ################################################################################
For each of the four L1 (UIM) stage Coil Output Filter banks, the differences in the Foton text file are as follows: Previously (before 08/31/2012): ################################################################################ ### ITMY_L1_COILOUTF_LL ### ################################################################################ # DESIGN ITMY_L1_COILOUTF_LL 0 zpk([],[],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 1 zpk([9.99999],[1],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 2 zpk([9.99999],[1],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 3 zpk([9.99999],[1],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 5 zpk([324.58],[59.9974],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 6 zpk([1],[9.99999],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 7 zpk([1],[9.99999],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 8 zpk([1],[9.99999],1,"n") ### ### ITMY_L1_COILOUTF_LL 0 21 1 0 0 Unknown 1 0.0000000000000000 0.0000000000000000 0.0000000000000000 0.0000000000000000 ITMY_L1_COILOUTF_LL 1 21 1 0 0 SimLP1L1 0.1001725184293824 -0.9996165783185160 0.0000000000000000 -0.9961723865238130 0.0000000000000000 ITMY_L1_COILOUTF_LL 2 21 1 0 0 SimLP2L1 0.1001725184293824 -0.9996165783185160 0.0000000000000000 -0.9961723865238130 0.0000000000000000 ITMY_L1_COILOUTF_LL 3 21 1 0 0 SimLP2L1 0.1001725184293824 -0.9996165783185160 0.0000000000000000 -0.9961723865238130 0.0000000000000000 ITMY_L1_COILOUTF_LL 5 21 1 0 0 AntiAcqL1 0.1938898668876849 -0.9772519830087036 0.0000000000000000 -0.8826755757975039 0.0000000000000000 ITMY_L1_COILOUTF_LL 6 21 1 0 0 AntiLP1L1 9.982777868412679 -0.9961723865238130 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ITMY_L1_COILOUTF_LL 7 21 1 0 0 AntiLP2L1 9.982777868412679 -0.9961723865238130 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ITMY_L1_COILOUTF_LL 8 21 1 0 0 AntiLP2L1 9.982777868412679 -0.9961723865238130 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ################################################################################ Currently (as of 09/04/2012): ################################################################################ ### ITMY_L1_COILOUTF_LL ### ################################################################################ # DESIGN ITMY_L1_COILOUTF_LL 0 zpk([],[],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 1 zpk([10.5],[1],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 2 zpk([10.5],[1],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 3 zpk([10.5],[1],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 5 zpk([300],[50],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 6 zpk([1],[10.5],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 7 zpk([1],[10.5],1,"n") # DESIGN ITMY_L1_COILOUTF_LL 8 zpk([1],[10.5],1,"n") ### ### ITMY_L1_COILOUTF_LL 0 21 1 0 0 Unknown 1 0.0000000000000000 0.0000000000000000 0.0000000000000000 0.0000000000000000 ITMY_L1_COILOUTF_LL 1 21 1 0 0 SimLP1L1 0.09541142041015412 -0.9996165783185160 0.0000000000000000 -0.9959813858777531 0.0000000000000000 ITMY_L1_COILOUTF_LL 2 21 1 0 0 SimLP2L1 0.09541142041015412 -0.9996165783185160 0.0000000000000000 -0.9959813858777531 0.0000000000000000 ITMY_L1_COILOUTF_LL 3 21 1 0 0 SimLP2L1 0.09541142041015412 -0.9996165783185160 0.0000000000000000 -0.9959813858777531 0.0000000000000000 ITMY_L1_COILOUTF_LL 5 21 1 0 0 AntiAcqL1 0.1744034418878165 -0.9810067536768792 0.0000000000000000 -0.8910959203698616 0.0000000000000000 ITMY_L1_COILOUTF_LL 6 21 1 0 0 AntiLP1L1 10.48092561352933 -0.9959813858777531 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ITMY_L1_COILOUTF_LL 7 21 1 0 0 AntiLP2L1 10.48092561352933 -0.9959813858777531 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ITMY_L1_COILOUTF_LL 8 21 1 0 0 AntiLP2L1 10.48092561352933 -0.9959813858777531 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ################################################################################
Looks good; thanks Garcia!
The ITMY & ETMY M0&R0 top stage CoilOutF filter modules matched the State Machine Diagram for the TOP Coil Driver before making modifications on the lower stage filter modules. All filter modules for every ITMY,ETMY M0&R0 CoilOutF filter modules are identical and contain the following digital filters: ################################################################################ ### ITMY_M0_COILOUTF_F1 ### ################################################################################ # DESIGN ITMY_M0_COILOUTF_F1 1 zpk([10],[1],1,"n") # DESIGN ITMY_M0_COILOUTF_F1 5 zpk([0.9],[31],1,"n") # DESIGN ITMY_M0_COILOUTF_F1 6 zpk([1],[10],1,"n") ### ### ITMY_M0_COILOUTF_F1 1 21 1 0 0 SimLPM0 0.1001724184483297 -0.9996165783185160 0.0000000000000000 -0.9961723827035119 0.0000000000000000 ITMY_M0_COILOUTF_F1 5 21 1 0 0 AntiAcqM0 34.24722014515512 -0.9881817593982465 0.0000000000000000 -0.9996549138717927 0.0000000000000000 ITMY_M0_COILOUTF_F1 6 21 1 0 0 AntiLPM0 9.98278783211981 -0.9961723827035119 0.0000000000000000 -0.9996165783185160 0.0000000000000000 ################################################################################
Found controller inoperative -> Replaced. Unit failed in July-will likely need aux. pump cart assistance to get going again. Note: GV16 alarm resulted as signal is now off-scale "high". Beam Tube gate valve annulus pressures are monitored by alarm handler
After noticing difficulties with untripping the QUAD watchdogs, I realized that a more sophisticated process is required to restore the QUAD status after a watchdog trip now that there are gigantic P and Y offsets on the TOP stage. Bare with me, it's complicated and convoluted because we didn't imagine this scenario while installing the infrastructure, but it's now on the "to-do" list to get it changed / more straight forward in the future.
For now, the process is as follows:
(1) Turn off the master switch.
(2) Untrip any relevant watchdogs.
(3) Change the gain in the P2P and Y2Y DriveAlign matrix filter banks to 0.00 (you can do this from the screen, or since you (currently) need a terminal open for the next step anyways, you can caput / ezcawrite it too). For example, if you're doing ITMY, that's
]$ caput H2:SUS-ITMY_M0_DRIVEALIGN_P2P_GAIN 0
]$ caput H2:SUS-ITMY_M0_DRIVEALIGN_Y2Y_GAIN 0
(4) Change the ramp time in the P2P and Y2Y DriveAlign matrix filter banks to 10 sec. (The link to the "full" screen is currently broken, so you'll have to do a "caput" or "ezcawrite" or whichever). For example, if you're doing ITMY, that's
]$ caput H2:SUS-ITMY_M0_DRIVEALIGN_P2P_TRAMP 10
]$ caput H2:SUS-ITMY_M0_DRIVEALIGN_Y2Y_TRAMP 10
(5) Turn ON the P and Y offsets to the desired value (if they're not on already); turn ON the damping loops (if they're not on already)
(6) Turn ON the MASTER SWITCH
(7) Change the gain of the P2P and Y2Y DriveAlign matrix filter banks back to one. Now that there's a ramp time in the signal chain, it'll slowly ramp up the offsets (and the P and Y damping loops), so the watchdogs won't trip.
--------------------------
The items on the "to do list" in order of difficultly/level of hackiness (from easiest / hackiest to most difficult / do-the-right-thingiest)
(1) Fix the DriveAlign Matrix sub-screen such that
(a) The "FULL" button works, and it opens the full filter bank (may just require an userapps svn up...)
(b) Add the TRAMP epics read/write to every element of the the upper level DriveAlign screen-
(2) Update the auto-damping script to include the above sophistication
(3) Offload what offsets you can to ISI and/or HEPI
(4) Make a model change such that the P and Y alignment offsets can be ramped (e.g. make the DCDRIVECAL gain a full filter bank, or add a ramp to the MASTER SWITCH, or something)
(5) Ask CDS to make the cdsEpicsIn block generate a TRAMP channel as well as a value channel on compile.
Garcia has volunteered to take on items (1) and (2) for now.
The auto-damping script for the H2 QUADs has been updated and committed to the "cds_user_apps" SVN repository. The updates include a gain-ramping of 10s for the P2P and Y2Y DriveAlign matrix elements. This will smoothly ramp the large DC M0 Pitch and Yaw offsets used for beam alignment. The script is committed to the SVN locally under: '/opt/rtcds/userapps/release/sus/common/scripts/' filenames: "sus_auto_damp_quad.txt", "sus_auto_UNdamp_quad.txt"
The previously-broken links in the "SUS_CUST_QUAD_M0_DRIVEALIGN.adl" file have been repaired.
The auto-generated filter module medms created by the RCG have had their filenames adjusted to a format resembling:
"H2SUSITMY_ITMY_M0_DRIVEALIGN_L2L.adl"
as opposed to a format previously used: "H2SUS_ITMY_M0_DRIVEALIGN_L2L.adl"
The generic files are located locally:
"/opt/rtcds/lho/h2/medm/h2susitmy/H2SUSITMY_ITMY_M0_DRIVEALIGN_*2*.adl"
The custom medm file for the DRIVEALIGN overview ("/opt/rtcds/userapps/trunk/sus/common/medm/quad/SUS_CUST_QUAD_M0_DRIVEALIGN.adl") was edited to point to the correct filenames.
The following table reports the frequency of all resonances as measured from TF and PSDs.
| IM1 | IM2 | IM3 | IM4 | |
|---|---|---|---|---|
| Yaw | 0.707 | 0.723 | 0.740 | 0.701 |
|
P/L 1 (mostly P) |
0.939 | 0.893 | 0.910 | 0.926 |
| P/L 2 (mostly L) | 1.041 | 1.006 | 1.021 | 1.035 |
| Trans | 0.996 | 0.996 | 0.996 | 0.996 |
| Bounce | 6.19 | 6.17 | 6.14 | 6.18 |
| Roll | 9.03 | 9.02 | 9.03 | 9.03 |
HAUX have no explicit fine adjustment to exactly match any of the resonances. However, Yaw is affected by the horizontal distance of the blade tips, can vary a bit during alignment is not usually checked agaist any reference. According to the model, 1 mm of difference in that distance translate in about 0.03 Hz of differece in Yaw resonance. If we have time, we can try playing with the blades to bring the yaw resonances closer...
Friday we re-installed ECD on all suspensions, adjusted the DC pitch of IM4 (that changes when you install ECDs) and run an OSEM calibration (using the same optical lever used for pitch balancing). We plan to do the same with the remaining suspensions Today, and have them ready for more (and possibly final) TF and PSDs tonight.
They were changed from the settings determined on the staging building test stand (first number) to:
H1:SUS-MC1_M1_OSEMINF_T1_OFFSET (-12980) -12987 GAIN (1.156) 1.155
H1:SUS-MC1_M1_OSEMINF_T2_OFFSET (-14639) -14642 GAIN (1.025) 1.024
H1:SUS-MC1_M1_OSEMINF_T3_OFFSET (-13929) -13821 GAIN (1.077) 1.085
H1:SUS-MC1_M1_OSEMINF_LF_OFFSET (-13879) -13761 GAIN (1.081) 1.090
H1:SUS-MC1_M1_OSEMINF_RT_OFFSET (-12265) -12104 GAIN (1.223) 1.240
H1:SUS-MC1_M1_OSEMINF_SD_OFFSET (-12570) -12666 GAIN (1.193) 1.184
I will run TFs next with the Top BOSEMs and then plug in the lower AOSEMs to set their offsets/gains.
Same known login problem... this wasn't me. It should have Betsy signature, I believe... :-)
Throughout the day, the CDS group performed multiple updates (cf Dave & Vern ALOG for details). When the computers were handed back to the users, I encountered some difficulties to restore HEPI BSC6. First, I was surprised by the large offsets on the position sensors (>10K counts ~ 15mils). Then, I realized that the pump was turned off. But after turning the pump back on, the HEPI did not come back to its nominal position. Some tests are currently being performed to understand what’s wrong with the HEPI at the end station.
I have attached the IPS readouts measured during the last 10 days. We clearly see that the HEPI position changed after the pump was shut down.
