This report is for 03 April 2012. Viton rim was installed on the second dust barrier. The condition of the chamber was documented and then the support tubes were inspected. Then, the tubes were picked and vacuumed. Support tube/bellows protection and dust barriers were installed. The chamber is ready for brushing.

Attached are plots of dust counts > .5 microns. I have included a plot of the mode of dust monitor 2 at end Y (H0:PEM-EY_DST2_MODE) to show when it lost communication.

Yesterday, Margot and Nicole worked on cleaning the ITMy.
While working with them I noticed divots under the metal prisms that were glued on last week by Gerardo and I, in 2 places.  We believe these are due to differential thermal expansion coefficients induced during the (what we believed to have been) low temp heating from a heat lamp.  Shown in the attached picture is one of the divots ~6mm in size under on of the 4 prism "legs".  The other divot is on the other prism (not show) and is much smaller at just under 1mm in diameter.  The prisms are not loose.

After consult with the larger SUS team, 
1) Gluing of all SUS optic/metal components is being evaluated to maintain the bonding strength and outgassing requirements of the glue joints, while minimizing the differential thermal expansion issue seen here.

2) We decided to reinforce the existing joints under the remaining legs with more glue and cure at room temp.  The VRB is being consulted vacuum compatibility of this since the outgassing step will not be complete.

These bonds were cured at room temp for ~24 hours, then the heat lamp was turned on for an additional ~24 hours.

Note that the other 2 metal/optic bonds here at LHO were performed on the TCP and the ERM and were successful.  However, we followed a slightly different procedure which called for immediate heat lamp heat for 16-24 hours.  As well, the configuration of these bonds was also different in that the prism "feet" ran the full length of the prism so the bond was much larger.  We are investigation what parameters factor into these failed bonds, and assessing the actual temperatures seen from heat lamp heating.

Scott(Apollo) & Jason

I don't have the absolute elevation worked out yet but the five shots we took on the Optical Table puts the level of the Optical Table to ±0.2mm.  If the In-Chamber leveling requirement is the same as that on the Test Stand (±100urad per E1101071); we are so very close.  The Optical Table is ~1955mm in diameter.

- SUS cartridge installed in BSC6 yesterday. SEI still has work to do (undressing cartridge, plumbing, cabling, HEPI dial indicator, assess level of support tubes)
- Installation of OMC MC tube
- CP1 and CP5 filled by PraxAir
- Sno Valley visits
- Stoneway Electric visits
- Dust monitors: #2 (EndY?) disconnected, unsure why
- Air handler at MY alarmed, possibly due to seasonal changes (no chilled water flowing at MY)
- CDS: Many reboots at BSC8 and BSC6
- OSB doors locked at 1600

The h2psl0 front end models were restarted by Michael, Jim and Vern.

The latest ISI model (and associated C code) were built using the latest trunk 2.5 by Dave and Vincent. This code was installed on h2seib8, and the original HEPI code was also started (test models from yesterday were removed).

Here are ResourceSpace links to four collections from yesterday's cartridge installation at EY.

** Part One -- Preparations
** Part Two -- Locking the Quad
** Part Three -- Flying the cartridge
** Part Four -- Landing the cartridge

You might need to sort the collections by date once or twice to see the contents in the proper order. Elsewhere in RS you might find better shots of the uncovered transmon than the video screen shots you'll see in the Part I of the collection above.

Attached are plots of dust counts > .5 microns for April 2, 2012. Note that the dust monitor at location 2 at end Y (H0:PEM-EY_DST2_5) has lost communication. I have included a plot of its mode (H0:PEM-EY_DST2_MODE) to show when.

First thing this morning, the Apollo crew headed down to Y-end to remove the man-lift that Dale used for filming the install. The engine hoist was moved from the northwest corner of the chamber cleanroom to a spot by the termination slab. 

In addition, the following items were agreed upon in a brief meeting:
-Remove jacks from chamber cleanroom (~03 April 2012, Apollo)
-Move SEI masses to E-module (~03 April 2012, Apollo)
-Remove loose vacuum line (~03 April 2012, Kyle)
-Move test stand to termination slab (~03 April 2012, Apollo)
-Assemble and customize cart for IAS (~06 April 2012, Jodi/Apollo)
-Remove CPStat from Test Stand cleanroom (At Bubba's discretion)
-Reinstall curtains on Work Space cleanroom (At Bubba's discretion)
-Move garbing/staging cleanroom to southeast corner of chamber cleanroom (At Bubba's discretion)
     *Note-This will clear the way for setting the ISCT table.
-Move TS and WS cleanrooms back into usable configuration (At Bubba's discretion)
-Re-clean cleanrooms (~05 April 2012, Tech Cleaning Crew)
-Remove appropriate port covers from south door (At Bubba's discretion)
     *Note-Need info from ISCT to make an informed decision.

- Preparing for the cartridge install at BSC6, led by Hugh R.
	- Suspensions Locking down
	- TMS being covered by a sock
	- EE guys modifying field connectors
	- Overall meeting to determine readiness
- Cartridge Landed
- PSL Table arriving today from Pacific Cascade Trucking.
- Carbon optical lever giraffe arrived from Aeroshear. 
- Sno Valley came to work on chillers (Ski)
- NorthCoast here for Ken
- DAQ cabling and hardware being rechecked at BSC8 by CDS and reboot of SEI and SUS

This report is for 02 April. The doors were removed and the support cleanrooms were moved into place. The support table was extracted and preserved clean. The viton rim was installed on one dust barrier and started on another. 

Dave, Jim and Rolf
We tested the inclusion of the DACKILL part in the user model. We created two test user models which we ran in place of h2hpiitmy and h2isiitmy on h2seib8. The models drove adjacent DAC channels. These channels were routed to unused ADC channels on h2susb478.
Initial tests showed problems which Rolf quickly fixed in trunk/ branch 2.5
we have left h2seib8 running the test models in preparation for running the new ISI model tomorrow.

Apollo Crew-Bubba Randy Mick Mark Scott LIGO-Jodi Jim Betsy Mitchell Travis JeremyB  Film Crew--Dale!

No real issues to report.  A little longer than we expected on the Cleanroom lift process and we had some resistance when pulling the last Alignment Pin.  But it is in place, torqued down and the Chamber is secure.

Thanks to all for their great patience and attention to detail.

Unusual HF resonances/noise were observed on the transfer functions recently measured on HAM-ISI Unit #4.

Multiple configurations were tested:

1. Initial Configuration: Top Mass Sitting on 3x thin Washers, one of them was mistakenly set on an optical table track (we found the washer bent) - Balancing Masses (5kg and 10kg) stacked on thin washers too.
2. Top Mass Sitting on 3 Thicker washers instead of the thin ones. Same configuration (thicker washers) for the 5kg and 10kg balancing Masses.                        -> The unusual 126Hz and 160Hz resonances are pushed towards ~195Hz, where we saw them on the previous Units. 
3. A bolt, and its washer, that were sitting in a vertical hole of corner #3 GS13's door were removed                                                                                                -> No Noticeable Effect
4. A cable, which was possibly rubbing, was set in another position                                                                                                                                                    -> No Noticable Effect
5. The washers set under the balancing masses were removed                                                                                                                                                         -> This considerably reduced the unwanted HF resonances/noise

A presentation for the results of each step is attached.

Transfer function measurements are running overnight on the ISI in its latest configuraton.

Routed field cables to BSC6 chamber next to appropriate feed-thru. SEI cables were connected to feedthru (ISI Coil Driver, Trillium T240, GS-13s, and L4C). SUS cables routed to chamber but not connected to feedthru.

Today, the sea container holding the H1 PSL laser (now intended for LIGO India) arrived and was unloaded at the Y-mid station (thank you RodneyH, Mark(Apollo) and MarkL).

There are four large wooden crates (one smaller than the other three) that are now stored in the VEA (see attached photo).

Our German colleagues are expected to arrive on April 23 to begin the process of moving the H2 PSL to the H1 Laser Area Enclosure.
At that time, they may open some of the crates to retrieve needed components.

They are checking on the ability to stack the crates, so we will hopefully be able to compact the load for long-term storage.

Please contact me or Michael Rodruck if the boxes need to be moved.

All five FE cores crashed at 11 mins past midnight Sun 1st April, this is not an april fools joke.

here is the dmesg capture before we reboot the machine.


[1426964.148086] h2pslfss: ADC TIMEOUT 1 31229 61 31293
[1426964.148088] h2psliss: ADC TIMEOUT 0 31229 61 31293
[1426964.148090] h2pslpmc: ADC TIMEOUT 2 31229 61 31293
[1426964.148092] h2psldbb: ADC TIMEOUT 3 31229 61 31293
[1426965.146334] h2ioppsl0: timeout 0 1000000 
[1426965.146339] BUG: unable to handle kernel NULL pointer dereference at (null)
[1426965.146341] IP: [] fe_start+0xe32/0x214e [h2ioppsl0]
[1426965.146349] PGD 0 
[1426965.146350] Oops: 0000 [#1] SMP 
[1426965.146351] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:2b:01.0/class
[1426965.146353] CPU 1 
[1426965.146353] Modules linked in: h2psldbb h2pslpmc h2pslfss h2psliss h2ioppsl0 open_mx mbuf
[1426965.146356] 
[1426965.146358] Pid: 0, comm: swapper Not tainted 2.6.34.1 #6 X8DTU/X8DTU
[1426965.146359] RIP: 0010:[]  [] fe_start+0xe32/0x214e [h2ioppsl0]
[1426965.146364] RSP: 0018:ffff8801beca7698  EFLAGS: 00010092
[1426965.146365] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000011e
[1426965.146366] RDX: 0000000000023c56 RSI: ffffffff81789ffd RDI: ffffffffa00311f2
[1426965.146367] RBP: ffff8801beca7ee8 R08: 000000007ffffff0 R09: 000000000000000a
[1426965.146368] R10: 0000000000000006 R11: 00000000ffffffff R12: 0000000000000000
[1426965.146370] R13: 0000000000000000 R14: ffffc900118d6000 R15: 0000000000000040
[1426965.146371] FS:  0000000000000000(0000) GS:ffff880001e20000(0000) knlGS:0000000000000000
[1426965.146372] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[1426965.146373] CR2: 0000000000000000 CR3: 0000000001a09000 CR4: 00000000000006e0
[1426965.146375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[1426965.146376] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[1426965.146377] Process swapper (pid: 0, threadinfo ffff8801beca6000, task ffff8801bec7aac0)
[1426965.146378] Stack:
[1426965.146379]  0000271700002711 0000271700000006 000000010000290b 0000000200000003
[1426965.146380] <0> 0000003500000003 ffffc900118d7034 ffffffffa0033a80 0000000000000000
[1426965.146382] <0> 0000000000000000 ffffc900118bc000 0000000400000000 00000000000007f8
[1426965.146384] Call Trace:
[1426965.146390]  [] ? cpumask_next_and+0x2c/0x39
[1426965.146394]  [] ? cpumask_weight+0xc/0xe
[1426965.146396]  [] ? find_busiest_group+0x36f/0x784
[1426965.146400]  [] ? timekeeping_get_ns+0x16/0x38
[1426965.146402]  [] ? apic_write+0x11/0x13
[1426965.146404]  [] ? lapic_next_event+0x10/0x14
[1426965.146406]  [] ? clockevents_program_event+0x75/0x7e
[1426965.146408]  [] ? tick_dev_program_event+0x37/0xf7
[1426965.146411]  [] ? enqueue_hrtimer+0x65/0x72
[1426965.146413]  [] play_dead_common+0x6e/0x70
[1426965.146415]  [] native_play_dead+0x9/0x20
[1426965.146417]  [] cpu_idle+0x46/0x8d
[1426965.146422]  [] start_secondary+0x192/0x196
[1426965.146423] Code: 00 8b 42 24 83 c8 01 89 42 24 8b 95 44 f8 ff ff 31 c0 8b b5 8c f8 ff ff e8 2a 13 00 00 48 8b 05 8f a7 00 00 48 c7 c7 f2 11 03 a0 <8b> 30 31 c0 e8 13 13 00 00 48 8b 05 78 a7 00 00 8b 00 66 85 c0 
[1426965.146433] RIP  [] fe_start+0xe32/0x214e [h2ioppsl0]
[1426965.146437]  RSP 
[1426965.146437] CR2: 0000000000000000
[1426965.146756] ---[ end trace d3abcc5123271f5d ]---
[1426965.146757] Kernel panic - not syncing: Attempted to kill the idle task!
[1426965.146758] Pid: 0, comm: swapper Tainted: G      D    2.6.34.1 #6
[1426965.146759] Call Trace:
[1426965.146761]  [] panic+0x73/0xe8
[1426965.146764]  [] do_exit+0x6d/0x712
[1426965.146765]  [] ? spin_unlock_irqrestore+0x9/0xb
[1426965.146767]  [] ? kmsg_dump+0x115/0x12f
[1426965.146769]  [] oops_end+0xb1/0xb9
[1426965.146772]  [] no_context+0x1f7/0x206
[1426965.146774]  [] __bad_area_nosemaphore+0x179/0x19c
[1426965.146776]  [] bad_area_nosemaphore+0xe/0x10
[1426965.146778]  [] do_page_fault+0xff/0x210
[1426965.146780]  [] page_fault+0x1f/0x30
[1426965.146784]  [] ? fe_start+0xe32/0x214e [h2ioppsl0]
[1426965.146788]  [] ? fe_start+0xe24/0x214e [h2ioppsl0]
[1426965.146791]  [] ? cpumask_next_and+0x2c/0x39
[1426965.146793]  [] ? cpumask_weight+0xc/0xe
[1426965.146795]  [] ? find_busiest_group+0x36f/0x784
[1426965.146797]  [] ? timekeeping_get_ns+0x16/0x38
[1426965.146799]  [] ? apic_write+0x11/0x13
[1426965.146800]  [] ? lapic_next_event+0x10/0x14
[1426965.146802]  [] ? clockevents_program_event+0x75/0x7e
[1426965.146804]  [] ? tick_dev_program_event+0x37/0xf7
[1426965.146806]  [] ? enqueue_hrtimer+0x65/0x72
[1426965.146808]  [] play_dead_common+0x6e/0x70
[1426965.146810]  [] native_play_dead+0x9/0x20
[1426965.146811]  [] cpu_idle+0x46/0x8d
[1426965.146813]  [] start_secondary+0x192/0x196
controls@h2psl0 ~ 0$ 

Attached are plots of dust counts > .5 microns.

We locked up TMS. The transport restraint chains/turnbuckles look wimpy, but  when you push TMS, it won't budge at all. It feels totally solid.

Some of the eyebolts were too big for the hook to fit (see the third picture) and we needed to use the screw part of the eyebolt.

One real snag was that we couldn't use the new ISC table protection plates as they  interfered with transport restraint structure. So the table is still protected by foils (first and second picture).