Today I turned the H2 fw0 system off. I used this system to test the reorganization of the raw minute trend files from one large directory to 256 directories depending upon the CRC8 check sum of the channel's name.
We are preparing H2DAQ for its move to the DTS system.
Mostly for myself (and to keep track in the event some push out to a subsequent vent), the following are items SUS still needs to do in HAM2/3 before the chamber is officially checked off the install list.
To be done in the next day:
Tweek lower stage AOSEMs to 50% OLV
Swap PFA EQ stop tips with fluorel/glass tips
Install Vibration Absorbers
Lock all EQ nuts
Things we're pushing toafter the next vent in the new year:
Re-check heights of prisms to table surface
Perform B&K Hammer testing
Round of FC cleaning since duration of chamber-work exposure to MC1 and MC3 optical faces was many weeks (duplicating the LLO schedule)
Install PR3, PRM, and all associated install and testing steps, etc. Balance of install/alignment procedure...
JimW, HugoP,
We continued payloading HAM2-ISI yesterday (12/11) morning to account for the absence of PRM. We put 166lbs of mass around PRM's future position. to do so we used:
- 2x50lbs
- 3x10kg
The attached picture shows the layout we picked for the masses. It also shows the mass stack used to account for PR3's absence.
We noticed sharp peaks on the ASDs measured with the GS13s of HAM3-ISI, since December 11th. The frequencies these peaks were observed were 3.5Hz, and 11Hz (see atachement).
Frequencies, and timing, correspond to Robert's injections for BSC1 magneting coupling tests. One of the coils used for this tests sits right next to HAM3 chamber. It is probably the one that causes the most coupling.
Robert's injections are 5 orders of magnitude above regular ambient magnetic field. The magnetic pickup seen on the GS13s of HAM3-ISI is no more that 2.5 orders of magnitude above seismic level. We are thus fairly confident that GS13s will not be impacted by the usual ambient magnetic field.
With the exception of 1/4 of the floor, wipe down was completed prior to Laser Safety Training at 2 pm yesterday.
Closed the O-ring valve and the gate valve @ the turbo overnight (closed at 16:15 local time), and I will restart pumping tomorrow morning.
Pumping restarted today at 7:46 am.
Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 PM Dec. 11 to 6 PM Dec. 12. Also attached are plots of the modes to show when they were running/acquiring data.
HAM3-ISI was unlocked uppon IO's request.
Ollie, Robert, Michael R
In an effort to mitigate table noise from the chiller we swapped the quick connect fittings on the oscillator manifold with barb fittings. Robert will post an aLOG later describing the status of this test in more detail. In the process we found/created a small leak in the return path valve in the crystal chiller line. This looked like it was coming from the threaded insert on the valve, so we replaced those. No leaks were found after.
Following the mysterious crash of the SUS IM model yesterday at 12:40pm (looks like a Dolphin or timing error, SUS IM model froze up, IOP model has hugh timing error, DAQ status 0x4000), we just restarted both models on the h1sush2b front end (h1iopsush2b and h1susim). The user model was burt restored to the safe.snap. The user watchdog continues to be tripped, so zero DAC drive throughout this restart.
Toward the end of shift I heard rumblings of rebooting HAM-AUX (requested by IO group & performed by Dave)
I got into the chamber about 11 am and exited at about 12:15. I took 8 samples (7 samples of large particles, 1 small of fine particulate) using the new collection kit, which worked well for the large particles. My overall impression is that this section of beamtube is not as "dirty" for large particulate as the HAM3-->HAM2 run: Large particles found in 3 sections in HAM9-->HAM8 vs multiple large particles found in all but one of the sections in the HAM3-->HAM2 run and less fine particulate on overhead nozzles in HAM9-->HAM8 vs lots of fine particulate (enough to show up on glove with light swipe)on overhead nozzles in HAM3-->HAM2. See pix below. The samples will be sent to CIT for characterization. Robert was getting ready to go in just as I was coming out so we'll see what he finds.
- Jodi, Cheryl Last Thursday (Dec 6) Jodi and I inspected the H1 input beamtube. Pictures attached show that we found white powdery stuff (HAM3 table, beam tube, MC2 cage), white fuzz (beamtube), part of a latex glove (baffle), fibers, and uniform particulate on the overhead nozzles (picture of gloved finger shows what came off with a swipe).
Regarding the last picture in the above collection: I took a look at the MC2 suspension today and see that this pile of particulate is metallic and is from the install arm brackets which mount at this location. We have not vacuumed this suspension since in-chamber, if ever.
Mark B. Starting TFs on MC1 following the fix.
Mark B. Data taken, damping restored. TFs look clean.
Note - the fix was performed this morning. Namely, I removed all 3 top BOSEMs and 2 of the flag mounts in order to run the 4 blade tip stops out 2-3 mm.
JimW, HugoP,
HAM3-ISI is locked.
Closed the O-ring valves and the gate valves @ the turbos overnight, pumping will continue tomorrow morning.
Pumping restarted at 8:12 am this morning.
Mark B. (This work was mostly done Friday 12/7 but I wanted to check a few things before posting.) After the M3UL OSEM was sorted out (see 4840), I went on to get all the matrices and settings checked out and the damping working. I ran prepare.m to be sure all the filters were loaded. I entered all the M1/M2/M3 OSEM2EUL and EUL2OSEM values from the output of make_sushlts_projections.m. I set SENSALIGN and DRIVEALIGN to the identity matrix. I set the signs in M1 COILOUTF to give +ve sensor response for +ve offset. The final values were -1, -1, +1, +1, -1, +1. This agrees with the settings previously used on the triples test stand but differs in SD from E1100109-v2. I set the signs in M2 and M3 COILOUTF per E1100109-v2. I found by trial and error a set of damping gains that gave stable damping, but these can probably be improved: -0.5, -2, -1, -0.02, -0.01, -0.04.
Mark B. According to Jeff B, the apparent sign flip for SD is expected - the magnets are put on per E1100109-v2 but the OSEM is on the opposite side for HLTS (the right as viewed from the back), so it sees the opposite sign of magnet.
