Staging was completed around the chambers and the north doors were removed from both chambers. The dust barrier was prepared for installation at the Mode Cleaner tube attached to HAM5.
(corey, Apollo Crew: Mark, Randy, Ed, Scotty, Caleb)
After the cleaning crew finished HAM3, Apollo started taking doors off (before lunch). After this, the crew started headlong with installing the ISI Installation fixture. Much more care was taken with positioning these parts due to fit issues discovered with HAM2 install. Mark mentioned being within a few sixteenth's for all the major interference points (i.e. HEPI Spring Cyllinders & HAM Chamber).
The large flange will be removed on top of the chamber.
The ISI is staged and ready to go (all lifting connectors are torqued on table & chain slings are attached to them). First thing in the morning, Apollo will hoist the ISI into position just outside of HAM3. We will then install the ISI.
BSC6 curves from cartridge install. +data file in .txt format.
Summary: Results from wiping experiments are consistent with the hypothesis that the black residue is brushing residue that has not been cleaned off by the wiping procedure because it has collected in scratches and crevices that are not reached by the stiff wipes. It comes off on latex gloves because they are less-stiff and can access those crevices. To avoid transferring the black residue from the walls to the optics, we could re-wipe the chambers with less stiff wipes, or we could instead use gloves made of a stiffer material than latex that doesn’t deform into the crevices that contain the residue and pick it up when a gloved hand touches the wall. Jodi will plan on trying nylon, nitrile, and co-polymer clean room gloves.
Jodi told me that that the black residue found after chamber cleaning (described here) does not require time to develop but instead blackens latex gloves immediately after chamber cleaning, even though it does not come off on the synthetic wipes that are used to evaluate chamber cleaning. This suggests that slow re-oxidation is not involved.
BSC3 was cleaned about a month ago, so I did a little study to see what wiped up the black residue and if the residue could be removed. Just as Jodi described, I found that a normal rub with the synthetic wipes we use to clean the chambers produced no black, but that the slightest rub with a latex glove immediately blackened the glove. I then found that I could get black on the wipes with a really forceful rub: as hard as I could press with an area of just one finger (see figure). I found that I could get black smudges with forceful rubbing of bunny suit material, in-chamber booties, and face masks, but nothing was as easy as getting smudges on the latex gloves.
I then checked to see if I could clean the black residue off of the wall so that there was no more that came off on latex gloves. To do this I rubbed a section of wall about 20 times with latex gloves. The figure shows that this worked well, resulting in no smudges on the test glove.
Thus our best hypothesis is that the black material is residue from brushing that collects in regions that are difficult to access with the normal wipes. A wipe that conforms more to the surface topography, such as latex, would remove more of the residue.
My biggest worry associated with the black residue (other than that the extra surface area may require longer pumping) is that we will transfer it from gloves to optics. We could mitigate this danger by re-wiping the walls with a less stiff wipe, or, less costly, by using gloves that were stiffer, e.g. made of the same materials as the booties, bunny suits, or wipes. For a start we could try knit filament nylon, nitrile or co-polymer clean room gloves.
Robert, Jodi
x data is in days, y in torr.
Pirani and cold cathode data from Feb 1.
MC2 Metal Build OLVs measured
BOSEMs
s/n 092, OLV 27702.4 (T1)
s/n 043, OLV 22923.7 (T2)
s/n 030, OLV 28098.7 (T3)
s/n 023, OLV 26766.2 (LF)
s/n 086, OLV 27693.4 (RT)
s/n 613, 30169.8 (SIDE) Characterized one
AOSEMs
M2
s/n 307, OLV 24825 (M2 UL)
s/n 474, OLV 24060 (M2 LL)
s/n 439, OLV 24304 (M2 UR)
s/n 305, OLV 25954 (M2 LR)
M3
s/n 207, OLV 24822 (M3 UL)
s/n 311, OLV 23630 (M3 LL)
s/n 446, OLV 26177 (M3 UR)
s/n 188, OLV 16687 (M3 LR)
[Stuart A, Jeff B, Betsy B] After being provided with the open light counts for each BOSEM and AOSEM on MC2, gains and offsets were calculated and plugged into the medm screen OSEM INPUT filters for M1, M2 and M3. M1 BOSEMs Top 1 (T1), sn = 092, OL = 27702.4, offset = -13851, gain = 1.083 Top 2 (T2), sn = 043, OL = 22923.7, offset = -11462, gain = 1.309 Top 3 (T3), sn = 030, OL = 28098.7, offset = -14049, gain = 1.068 Left (LF) , sn = 023, OL = 26766.2, offset = -13383, gain = 1.121 Right (RT), sn = 086, OL = 27693.4, offset = -13847, gain = 1.083 Side (SD) , sn = 613, OL = 30169.8, offset = -15085, gain = 0.994 M2 AOSEMs Upper Left (UL) , sn = 307, OL = 24825, offset = -12413, gain = 1.208 Lower Left (LL) , sn = 474, OL = 24060, offset = -12030, gain = 1.247 Upper Right (UR), sn = 439, OL = 24304, offset = -12152, gain = 1.234 Lower Right (LR), sn = 305, OL = 25954, offset = -12977, gain = 1.156 M3 AOSEMs Upper Left (UL) , sn = 207, OL = 24822, offset = -12411, gain = 1.209 Lower Left (LL) , sn = 311, OL = 23630, offset = -11815, gain = 1.270 Upper Right (UR), sn = 446, OL = 26177, offset = -13089, gain = 1.146 Lower Right (LR), sn = 188, OL = 16687, offset = -8344 , gain = 1.798 Now that these OSEM gains and offsets have been applied, each OSEM can be centred/aligned.
[Stuart A, Jeff B, Betsy B]
Relevant DQ channels needed to be made available for the new x1sushxts05 model. Therefore the x1sushxts05.ini file has been edited to include the following channels (note that the original file was backed-up with the file name x1sushxts05_bak.ini):-
X1:SUS-HXTS_M1_OSEMINF_T1_OUT_DQ
X1:SUS-HXTS_M1_OSEMINF_T2_OUT_DQ
X1:SUS-HXTS_M1_OSEMINF_T3_OUT_DQ
X1:SUS-HXTS_M1_OSEMINF_LF_OUT_DQ
X1:SUS-HXTS_M1_OSEMINF_RT_OUT_DQ
X1:SUS-HXTS_M1_OSEMINF_SD_OUT_DQ
X1:SUS-HXTS_M1_DAMP_L_IN1_DQ
X1:SUS-HXTS_M1_DAMP_T_IN1_DQ
X1:SUS-HXTS_M1_DAMP_V_IN1_DQ
X1:SUS-HXTS_M1_DAMP_R_IN1_DQ
X1:SUS-HXTS_M1_DAMP_P_IN1_DQ
X1:SUS-HXTS_M1_DAMP_Y_IN1_DQ
X1:SUS-HXTS_M2_OSEMINF_LL_OUT_DQ
X1:SUS-HXTS_M2_OSEMINF_LR_OUT_DQ
X1:SUS-HXTS_M2_OSEMINF_UL_OUT_DQ
X1:SUS-HXTS_M2_OSEMINF_UR_OUT_DQ
X1:SUS-HXTS_M2_WIT_L_DQ
X1:SUS-HXTS_M2_WIT_P_DQ
X1:SUS-HXTS_M2_WIT_Y_DQ
X1:SUS-HXTS_M3_OSEMINF_LL_OUT_DQ
X1:SUS-HXTS_M3_OSEMINF_LR_OUT_DQ
X1:SUS-HXTS_M3_OSEMINF_UL_OUT_DQ
X1:SUS-HXTS_M3_OSEMINF_UR_OUT_DQ
X1:SUS-HXTS_M3_OSEMWIT_L_DQ
X1:SUS-HXTS_M3_OSEMWIT_P_DQ
X1:SUS-HXTS_M3_OSEMWIT_Y_DQ
The framebuilder was restarted using the following commands:-
telnet tripleteststand 8087
shutdown
Now that all the above channels are available, it should enable transfer functions and power spectra to be taken.
[Stuart A, Jeff B, Betsy B] Thanks for the efforts of those on-site at LHO, who have suspended MC2 (HSTS) and aligned BOSEMs/AOSEMs, which has enabled the first set of transfer functions to be taken this evening, using the alternative x1sushxts05 model on the triple test stand. Prior to taking transfer functions it was necessary to conduct some pre-flight checks of the digital system, watchdogs, filters, and verify correct sensor and actuator signs. Transfer functions have been carried out for all degrees of freedom with damping loops OFF. These show good agreement with the model, can be found below. However, these TFs need to be compared with results from previous phases (plots pending), and M1, M2, M3, power spectra taken, before MC2 can complete Phase 1b testing. All data, scripts and plots generated have been committed to the SUS svn as of this entry. Finally, a BURT snapshot has been taken of the functioning x1sushxts05 environment (20120614_x1sushxts05_MC2.snap).
Manually removed oldest frame files to reduce /frames disk usage on tripleteststand, bscteststand2, and seiteststand2. (Routine maintenance)
The report regarding HAM-ISI Unit #5 (HAM3) chamber side testing, and the procedure followed for this phase of testing, are available under the DCC.
This unit is ready for in-chamber installation.
- Terry and Christina finished cleaning HAM5 and HAM6. - Apollo installing cable trays at HAM1 output. - Electrical work for HVAC in LSB fiber bonding lab. - Thomas aligning OpLevs. - BSC1 ICC ongoing. - Gerardo leak-checking BSC6's volume. - HAM ISI prep into HAM3. - Fine actuator install at HAM1. - Jim working on HAM2, cabling. - Richard installing cable trays on output arm. - Lacing tray installation for SUS cabling. - 09:50 - Bob from Mid-Columbia Forklift arrives. - Craning of cleanroom, actuator install. - Vincent recompiled filters. - 13:00 - Oxarc arrives - Safety meeting at 3pm - OSB Doors locked at 4:15pm
Attached are plots of dust counts > .5 microns.
Continuing with documentation of installed-hardware, below are the serial numbers for instruments/parts on HAMISI #6 (other s/n's are located here, & here). We now have missing hardware for the CPS, so they can be installed. The Walls can also be installed on this assembly. Ok, below is s/n info:
GS13 (The Vertical GS13 Walls were installed. Thought we could see s/n's with a mirror, but it's not possible, so we had a short step backward to have visual for s/n's)
CPS (these are not installed yet, but know their ultimate location due to slots in the mini-rack)
Vertical L4C
Stage0: 009
Stage1 Floor: 009
Optics Table: 005
Daniel, Alberto Today we switched the connection of ALS PZT input from the slow output the Common Mode Servo board from the slow to the fast output. In this way we managed to lock the ALS PLL for a very short time: at best we could keep it locked for few seconds. For lack of enough dynamic range in the servo, the PZT was not able to make up for even modest laser frequency drifts. During the locked time we measured the OLG. The UGF was at about 8kHz. We locked the PLL with the common mode board settings of the slow-control interface as below: 0 BOOST -32 dB GAIN IN1 -15 dB FAST GAIN (Total gain -47dB) Slow/temperature control slide: -0.006 To solve the problem we should now try to setup the slow temperature control loop.
The cleanroom at HAM 2 was shifted as far to the south as possible. The cleanroom that had been used for BSC1 ICC garbing/staging was converted to a large garbing room for use at both HAM2 and HAM3 for the next several weeks. Two Type C cleanrooms will be moved into place for use at HAM2 and HAM3. Several SUS shelving units were moved to make way for short-sided BSC cleanroom over HAM3: that activity should take place after lunch but before safety meeting.
The second cleaning was completed this morning. In addition, Christina repaired the Ameristat covering the concrete patches around the HEPI piers to help maintain cleanliness. Many items were moved from BSC1 to HAM5/6 area.
The FTIR paperwork was generated and the kit shipped off to JPL. The dome was returned to the chamber and the permanent flooring was installed. With a crew working on either side of the chamber, the doors were returned after being vacuumed and wiped. All ICC activity was completed by lunch. The cleanrooms will be moved after lunch.
[Stuart A, Jeff B, Mark B, Jeff G] Initial M1-M1 damped and un-damped transfer functions have already been taken for the PR3 (HLTS), see LHO aLOG entry 2649. Recently, magnets and AOSEMs have also been added to the lower stages (M2 and M3) to complete the full metal suspension, see LHO aLOG entry 2953. As part of Phase 1b testing, these transfer functions can be compared with the model as well as TFs obtained from LLO's PR3 Phase 1b results. Also, since BOSEM and AOSEM sensors are available at all stages, power spectra can now be be taken. Pre-flight checks have been carried out:- - Confirmed watchdogs are configured to within accepted limits (see LHO aLog entry 2576). - Confirmed M1 BOSEM INPUT FILTERS, gains and offsets (as per LHO aLog entry 2645). - Configured M2 and M3 AOSEM INPUT FILTERS, gains and offsets:- M2-UL s/n = 448, open-light = 18318.0, off-set = -9159.0, gain = 1.638 M2-LL s/n = 601, open-light = 20793.0, off-set = -10396.5, gain = 1.443 M2-UR s/n = 336, open-light = 19426.0, off-set = -9713.0, gain = 1.544 M2-LR s/n = 413, open-light = 18210.0, off-set = -9105.0, gain = 1.647 M3-UL s/n = 489, open-light = 17727.0, off-set = -8863.5, gain = 1.692 M3-LL s/n = 269, open-light = 23463.0, off-set = -11731.5, gain = 1.279 M3-UR s/n = 461, open-light = 25154.0, off-set = -12577.0, gain = 1.193 M3-LR s/n = 287, open-light = 17820.0, off-set = -8910.0, gain = 1.684 - Configured COIL OUTPUT filter gains and signs, as specified in T1200015-v1. However, the sign has to be switched from - to + for the "side" BOSEM, since it has been relocated to the opposite side of the structure (as requested by SYS). Firstly, I conducted some quick low-res M1-M1 TF's on all dofs in DTT (not recorded), just to confirm that no earthquake stops, blade stops or OSEM flags were rubbing since the last TF's were taken. The TFs obtained for Phase 1b testing of PR3 have now been compared with those obtained at previous phases of testing (allhltss_2012_06_07_AllHLTS_ALL_ZOOMED_TFs.pdf). Plot Key:- Blue trace = Model Orange trace = LLO PR3 Phase 1b at test-stand with damping OFF Black trace = LHO PR3 Phase 1b at test-stand with damping OFF Pink trace = LHO PR3 Phase 1b at test-stand with damping ON Prior to taking power spectra data, it was necessary to enable the following DQ channels, so that data could later be extracted from the frames:- X1:SUS-HXTS_M2_OSEMINF_LL_OUT_DQ X1:SUS-HXTS_M2_OSEMINF_LR_OUT_DQ X1:SUS-HXTS_M2_OSEMINF_UL_OUT_DQ X1:SUS-HXTS_M2_OSEMINF_UR_OUT_DQ X1:SUS-HXTS_M2_WIT_L_DQ X1:SUS-HXTS_M2_WIT_P_DQ X1:SUS-HXTS_M2_WIT_Y_DQ X1:SUS-HXTS_M3_OSEMINF_LL_OUT_DQ X1:SUS-HXTS_M3_OSEMINF_LR_OUT_DQ X1:SUS-HXTS_M3_OSEMINF_UL_OUT_DQ X1:SUS-HXTS_M3_OSEMINF_UR_OUT_DQ X1:SUS-HXTS_M3_OSEMWIT_L_DQ X1:SUS-HXTS_M3_OSEMWIT_P_DQ X1:SUS-HXTS_M3_OSEMWIT_Y_DQ To ensure the above channels were available it was necessary to restart the framebuilder. Power spectra have been taken (using the Matlab script "plothlts_spectra.m") with damping loops both ON and OFF for each stage (2012-06-08_1800_X1SUSPR3_M*_ALL_Spectra.pdf) Power spectra data, again with both damping ON and OFF have been taken, which compare X1 PR3 (at LHO) and X2 PR3 (at LLO) on the triple test-stands (allhltss_2012-06-08_ALL_Spectra_Don.pdf and allhltss_2012-06-08_ALL_Spectra_Doff.pdf). In addition, power spectra for specific degrees of freedom (L, P and Y) can be more conveniently compared across multiple stages (M1, M2 and M3) of the same suspension in the final plots found below (allhltss_2012-06-08_X1SUSPR3_M1M2M3_Spectra_ALL_Don.pdf). A BURT snapshot has been taken of the latest PR3 functioning environment "20120606_x1sushxts_PR3.snap" and stored in the following directory:- "/opt/rtcds3/tst/x1/cds_user_apps/trunk/sus/x1/burtfiles". All data, plots and scripts have been committed to the SUS svn as of this entry. This should now be sufficient to complete Phase 1b testing of the PR3 suspension. Finally, thanks also to Jim Batch for being able to restart the trippleteststand when I was unable to log-in remotely earlier today.
It was spotted by Jeff K that the incorrect hsts model d values were used in the previous run of the "plotallhlts_tfs" script. This script has now been re-run with the correct model parameters, to show a proper comparison of the model, LHO PR3 with damping ON and OFF, and the LLO PR3 chamber-side. The P-P transfer function is now consistent with the model and is available below (llhltss_2012_06_13_AllHLTS_ALL_ZOOMED_TFs.pdf).
