The MEDM Vacuum snapshot is not viewable as of 17:00.

john

I used Foton to add 10:0.4 filters to each of the UI and PEN OSEM input channels on the quad test stand to compensate for the hardware whitening filter in the satellite boxes. (Such filters were already in place on the top mass OSEMs, so I just copied the definition across.) They should be left enabled from here on.

fb0w continues to reset itself, it appears to have started on Friday. Restarted ldasgw0, which had sam errors, but couldn't remount frames on it, and I don't have the password for root.

The machine running the ioc for fmcs (control9) got restarted. For some reason I thought running checkcds set the fmcs alarms, but it does not. Instead I had to run /cvs/cds/project/fmcs/set_Minor_Severity.pl and /cvs/cds/project/fmcs/AlarmSetFmcs.csh on control9 (a Solaris box). However the following remain, but not on the alarm handler anymore:
H0:FMC-CS_OSB_AH_CLDDECKTEMP_DEGC alarmed high at 16.41 deg C
H0:FMC-CS_LVEA_ZONE3B_D_DEGC alarmed low at 18.26 deg C

The H2 RM was craned over the beam tube.

PID values accumulated during stuck needle valve period taking too long to clear. CP1 as low as 65% full yet PID output still at minimum value (5% for CP1)  -> Came in and filled CP1 in manual mode. Changed PID parameters to expedite clearing out of accumulated values then restored nominal PID parameters.  PID should be current and assume control.

CP1 and (to a lesser degree) CP2 have been slowly overfilling since early Tuesday afternoon -> I investigated today and observed that the magnehelic pressure gauges which are in parallel with the pump level transducers aggree with the CDS indicated values, i.e., the pumps are in fact, overfilled.  Dewar inspection indicated everything normal, Dewar vapor (head) pressures normal, LLCV bypass valves closed, dewar exhausts flowing normally, pump exhausts flowing normally etc.  
No evidence of "ice ball" buildup around exposed LLCV needle valve valve stem which have prevented full stroke of needle under some conditions in past winters.
Problem coincides in time with undocumented events from about 1pm-2pm local time on Tuesday (power cycling? reboots?) -> Set LLCV to manual mode and 50% open valved-out instrument air at LLCV and did not observe valve stroke??? Used heat gun to thaw exposed valve stem and repeated.  Now valve stroking between 5% open without instrument air present to 50% of stroke when air valved-in.  Repeated thaw excersise with LLCV needle at CP2.->

Conclusion:  It looks like LLCV needle valve valve stem was prevented from stroking closed via ice buildup on exposed portion of valve stem.  This is consistent with current symptom and past history.  The difference in this case is that the ice buildup was not obvious, i.e., no visable "ice ball" this time, but rather, only a thin layer of frost on the valve stem.  Weather conditions persist.  This problem may reoccur, will monitor.

(Dani, Keita, Matt, Gerardo, Zack, Mike)

We removed all components from the optics tables in HAMs 8 and 9.  We locked down MC2, MMT2 and the RM before extraction.  The AOS PO telescope in HAM9 was pulled with the aid of the surf board/forklift combination, lifting the unit out and transferring it from board to table, once out of chamber. Other components removed include black glass dumps, wire-protection baffles, posts, DLC mount and mirrors, and sundry clamps and hardware.  Currently the SOSs are in the OSB optics lab, while the RM and AOS telescope remain in the LVEA.

Next week we'll pull optics tables and passive stacks in those HAMs.

CP1 and CP2 level fluctuations appear to be the result of a brief period of loss of control from early in the afternoon.  DV trend earlier shows bogus transient values (somebody rebooting???) -> I am monitoring from home now.  PID parameters seem unchanged.  System should recover.  I receive text alarms on my cell phone if levels remain in alarm for more than ~15 minutes.  

Terri S., Christina -> Cleaned and prepped HAM8 and HAM9 work area

Kyle, Ski, Zak+Rodney (Manpower), Chris (Apollo), Gerardo Jr. -> Removed HAM8 and HAM9 west doors.  

Kyle -> Opened GV8 and GV6

Shifted over to Chiller 3 and CWP3 following a shutdown of Chiller 1.  Investigating cause.

Happy Thanksgiving!

Kyle-Removed all but (4) loosened bolts from HAM8 and HAM9 West doors in preperation for removal tomorrow*Isolated Vertex MTP*Resumed roughing XBM*Switched XBM to MTP*Restored Vertex MTP*Began pumping HAM6 with its turbo*misc. annulus ion pumping

X-end pumping flat->no access (tumbleweeds)->will investigate/fix as soon as road reopens.

Will likely relieve CP1 and CP2 H2 pressures before long weekend.

Highlights:
-Richard and DaveB working on moving PEM channels and issues with end-station communications
-staged for tomorrow's entrance into HAM8 and HAM9
-craned ISCT10 over Y-Beam Manifold
-craned garb room into the LVEA diagonal
-loosened bolts on HAM8 and HAM9 for tomorrow's opening of HAM8 and HAM9
-Tomorrow - 8:15am meeting, first order of business is clear HAM8 and HAM9

1057 - Dave calls to say that he's moving PEM channels from h2adcupem -> h2adcusus
1203 - Sheila goes out to turn squeezer back on
1205 - Praxair at MY
1455 - Squeezer Laser is on

Sheila Dwyer notified the Control Room at ~2:55pm that the laser has been turned on.  Please follow the relevant safety precautions for Squeezer operation until further notice.

Kyle-Installed remaining bolts and torqued BSC7 east door*Closed GV4*Isolated Diagonal Volume from Purge Air*Pumped GV4 gate annulus volume*Pumped to <100 torr XBM with EDP200*Isolated Vertex MTP*Used Vertex QDP80 to continue pumping XBM to 7 torr*Isolated pumps from XBM (will finish tomorrow)*Restored Vertex MTP to continue pumping Vertex volume

Kyle-Finished roughing down HAM6 (had started Friday?

Activities:
HAM 8 & 9  cleaning
move ISCT10 meatlocker to H1 bay for squeezers
move ISCT4 enclosure table  

~9:35 squeezer laser turned on
~12:05 squeezer laser turned OFF

~1:25 – Ski and others begin moving meatlocker and table by ISCT10 and the table under it.


Door Access alarms:
Y-end door alarm
10:05 - east bay emergency egress door

medm alarms:
FMCS - Annulus Ion Pump – periodically

Due to the winter storm weather we are having, the Staging Building temperature dropped over the weekend to 60 deg F.  Both chains rose in height enough that all 4 top OSEMs were near or at 0 OLV.  Resetting temperature controls in the building restored the OSEM/chain alignment as the temperature came back up to ~70 deg F over the last few days.  

Started one or more sets of heaters in out buildings.
Turned heat on in Staging and Warehouse.  Will have to monitor and possibly reprogram thermostat for winter use.
Shut outside air dampers down on Staging building to help maintain temp.
Replaced battery on tractor.
Bailing tumbleweeds still/

I changed the startup script for dataviewer on bscteststand to use 10.11.0.25 for a server instead of "teststand0" which doesn't exist.  

Kyle, Zack, Rodney - Hung BSC7 east door on chamber.  

Kyle - Began pumping Vertex and HAM6 volumes.  

Kyle - Switched Y-end from MTP to Ion pump, spun MTP down, shut-down QDP80

We realigned and balanced Quad 2 after adding weight to the test masses to account for the increase weight of the glass masses. We had to replace the three lower wires on the Main Chain due to stretch. Found the flags for the UI OSEMs need to be installed and run in at least half way to attain proper pitch. We characterized all magnets and checked polarity per E1000617. BOSEMs on the Top mass have been tested for full range function and are set to their mid points. We will start testing the Top Mass BOSEMs on Monday.
 
Notes: 
(1). The blade stop bolts must be run down so the head is below the level of the magnet holder. If not they will interfere with the left and right BOSEM alignment. 
(2). Watch the side magnet and flag, as it is prone to hanging on the BOSEM, causing misalignment. 
(3). Be sure to square and level the Table Cloth before adjusting the BOSEMs. This is especially important for the correct positioning of the left and right BOSEMs. Failure to set the Table Cloth properly can cause the BOSEM to push down on the Top Mass, throwing off the alignment of the other BOSEMs.