most of the CDS equipment in the control room, MSR and computer users room has been powered down in preparation for tomorrow morning's power outage. I have left the main file server, networking gear and web servers running to provide monitoring ability from offsite.
Kyle, Bubba, Nicole, Scott -> Hung HAM10 North door. Kyle -> Isolated and spun-down MTP at X-end. Shutdown QDP80 at X-end.
(Corey, Hugh, Nicole, Scott)
Since the HAM10 door needed to pulled off for BSC4 extraction, we took this opportunity to check and level the HAM10 Support Tubes. The Support Tube elevation was recently changed when Stop Links were installed on all H2 LVEA Scissors Tables (here's an entry to how it was done on BSC Scissors Tables).
After going inside HAM10, and checking the Support Tube level we saw that the Tubes weren't level (so, setting the Scissors Tables to the Stop Link elevation DID NOT level the Support Tubes).
Checking The Elevation
To come up for a way to diagnose level in the future, various surveys were taken of the Support Tube. Surfaces of the Support Tube are available external to the HAM chamber. With the optical level, elevations of the ends of the Support Tube were taken (there's a surface of the Support Tube available between the V-Block and Bellows). With these elevations, we were able to check elevation and see where we needed to go to set the elevation of the Support Tubes.
Setting The Elevation
The Support Tubes can be raised and lowered via the Scissors Tables (there are adjustment screws accessible inside the Piers). To make the move, Dial Indicators were mounted such that they referenced the Accelerometer Plates on the ends of the Support Tube (see attached photo). With the elevations taken above, we had targets for where each end of a Support Tube roughly needed to be. So at each Pier, one person raised/lowered the Scissors Table while another person monitored the Dial Indicator. All four Scissors Tables were adjusted to get each Support Tube end to where it needed to be. We were able to get these within 0.002-0.004" of each other.
An External Support Tube Check-- We Appear To Have A Technique
To confirm whether our external level adjustment truly did level the Support Tubes, once again, we went into the chamber and took optical measurements. A scale was sighted as it was set on the bolt hole boss surfaces (these are highly machined surfaces and ideal for checking level). Additionally, we also looked at machined surfaces of the Support Table.
With a Design (aka target) Elevation of 4.878", we had the following elevation readings (taken from two different spots...some were taken twice):
---then level was moved to sight the SW corner, and we got these readings from a different sight location:
So, the Tubes were within 0.006" of each other, and they were roughly 0.010" low.
These appear to be acceptable results and prove to be an option for checking/setting Support Tube elevations for other HAM chambers. Hugh mentioned we may want to bias the Support Tubes up, just to account for any compression which may occur when the HAM-ISI is installed.
After this work was completed, the HAM10 door was re-installed.
(Bubba, Corey, Scott)
[this work occurred on Tuesday 2/8/11]
After the HAM12 anchors were installed the HAM Pier Grout Plates were installed, and then the HEPI Piers were placed on the Grout Plates. The top of the Pier's elevation was set with respect to the bottom of the HAM E-nozzles. The distance from the bottom of the E-nozzle down to the top of the HEPI Pier is 4.557" (115.75mm). The individual level was within 0.004" and between Piers we aimed to get within 0.010".
The Piers were torqued to 125 ft-lbs.
Events of Note: 0830 - UniFirst arrives 1020 - PraxAir filling CP6 1023 - Water delivery Personnel are reminded to adhere to site access procedures and use their access cards at all times when required.
Due to a scheduled power outage the aLOG will be unavailable during the first half of the day (pacific time).
[Corey, Hugh, Scott]
In a continued effort to figure out the Support Tube/V-block discrepancy noticed between H1 & H2, Scott and I tried a couple more measurements (vs the Air Bearing/Air Bearing measurement we made Fri). On Friday, we determined that the distance between Crossbeams is the roughly the same for H1 & H2, BUT visually it looks like the Support Tubes appear to be different lengths between H1 & H2 (on H2, the Support Tubes look smaller and instead of being flush with the V-Block, they are inside the V-Blocks.
Today, we removed the Accelerometer plates of a few H2 Support Tubes, hung plumb bobs off the end of the Support Tubes, made a mark on the floor and then measured the length of the Support Tubes via these floor marks. This was also done on H1 (it was noticeably harder because of all the cables and cable trays).
Aiming to have an accuracy within 1/16th, here are the results from the random chambers we looked at:
Now as a comparison, the drawing for the Support Tube (D972610) shows a Support Tube length distance of 93.190" (~93 3/16"). So, it appears our H1 Support Tubes are longer (whatever that means....beause H1 Support Tube/V-block connections look better).
It appears the extra distance is all in the "nose". We made a measurement from the outboard surface of the Bellows out to the end of the Support Tube, and we could see an obvious length distance here. For the H2 Support Tubes, this distance is ~3 19/32" and for H1 this distance was ~4 3/32".
Notes on attached photos:
Photo#1: The "inboard" H2 Support Tube in its V-Block (at HAM7)
Photo#2: The "flush" H1 Support Tube in its V-Block (at HAM6)
Valved-in IP1, 2, 3, and 4*Valved-out Vertex MTP
Oscar was bailing tumbleweeds Work was done on the automatic raising and lowering of the clean room over HAM6 Dani took Greg, Mark and Bram on a laser safety tour of the LVEA The H1 PSL was turned on for the squeezer experiment
Actually, "motorized" would be a better term than "automatic". For the BSC cartridge install we need the ability to lower the cleanroom to make room for craning the cartridge overhead. Since the crane is occupied with the cartridge we need an alternate mechanism to lower and raise the cleanroom. The prototype system is being tested at the HAM6 cleanroom.
SUS finished the installation (swapping out defective OSEM and rebuilding the flag mounts on the Top Mass) of the OSEMs in the FM Top mass and Penultimate mass. All ten OSEMs in FM1 have been aligned, centered, and zeroed. Mark B. is starting the testing cycle
[Corey, Scott]
Hugh noticed some discrepencies between how the ends of the HAM Support Tubes looked with respect to the V-Blocks (basically, all the H2 ones looked inboard everywhere, and H1 looked better). Scott and I went around to each chamber and took a measure of the distance between bolt holes on the top of the airbearings (to get an idea of the crossbeam/crossbeam distance for each HAM chamber).
Below, shows the measurements we made between Air Bearings. Took linear measurement between Air Bearings (i.e. inline with the Support Tubes). Overall, the measurement looks similar. So, the notable issue is why the Support Tubes on H2 are all in-board of the V-blocks. Are these Support Tubes smaller??
(*Didn't make measurements for HAM6 since there was a suspended Clean Room over it)
| #1 | #2 | Visual Observations of Support Tube wrt V-Block outer surface | |
| HAM1 | 69-5/16 (east) | 69-5/16 (west) | Nice & flush |
| HAM2 | 69-7/16 (east | 69-8/16 (west) | Support Tubes translated to south |
| HAM3 | 69-5/16 (east) | 69-7/16 (west) | Support Tubes translated to south |
| HAM4 | 69-4/16 (south) | 69-6/16 (north) | Support Tubes translated to west |
| HAM6 | Flush with V-Block outer surfaces (very good!) | ||
| HAM7 | 69-4/16 (east) | 69-5/16 (west) | Inboard on both sides by quite a bit! |
| HAM8 | 69-4/16 (east) | 69-5/16 (west) | " |
| HAM9 | 69-4/16 (east) | 69-6/16 (west) | " |
| HAM10 | 69-9/16 (north) | 69-5/16 (south) | " |
Highlights: - Hanford Fire Department work. - Problems with chiller fans, temperature anomalies across the site. - HAM10 staging. - Laser Hazard -> Squeezer work at the PSL table -> Laser Safe.
[Bubba, Corey, Hugh, Nicole, Scott]
After surveying work yesterday (level of the Support Tubes), we leveled up the Support Tubes via the Scissors Tables. Once this work was done, we pulled out the Support Table so Jodi could go in and do some fit checks for cleaning work. The Support Table is still out, and will hopefully get re-installed on Fri.
Restored YBM to nominal status. Also, valved-out XBM MTP and valved-in IP6
BS/FM 1 fully assembled. BOSEMs installed on Top Mass and PenRe. Full/No Light counts completed for Top Mass BOSEMs, and flags have been centered at 50%. PenRe BOSEM Light Counts will be completed today and then the flags will be centered. BS/FM 1 will be ready for testing and TF by the end of the day. Working with Rai Weiss to determine secondary prism location on FM Dummy Test Mass.
CP1 and CP2 may alarm during the night if the outside temperature drops too low for too long (ongoing issue with moisture in actuators freezing). I will monitor from home. Permanent fix pending time availability.
No major work done today
FMCS was down, I restarted it by running the fmcs.pl script on h0tempmon - the wiki says this is supposed to run on h0vacman, but that computer is not connected to the network.
FMCS software does indeed run on h0tempmon, I have modified the cds wiki entry
