Blocked PSL output beam into IFO
Checked: HV at IOO & OMC are off, jam nuts in position,
Closed V1 and VM3, opened VV1 to N2 regulator
We are venting at 1 Torr/min rate
The vertex crane drive is overheating, it stopped functioning. Service man will be here tomorrow morning.
I crane was just turned on for for may be about 5 minutes. The vertical drive was fine for a while, but the horizontal did not worked at all.
The crane is tagged out again and the controller box is cooling down.
Atm1, Vertex crane controller unit on horizontal I-beam.
Module CCES-407 1HP 2.3A 460V/3 phase on the right was replaced. Speed was increased to 30 Hz
Atm2, See burned insulation on black wire that was shorting to the large suppressor resistor on Atm3 One can see the pit marks on the right end of it.
This large power dissipater resistor got hot as the malfunctioning controller 407 broke down. Touching black power wire insulation melted and made a short.
So the heat was created and finally the fuses were blown. The unnecessary large fuses were replaced by small ones.
Fortunately we had one spare controller on hand that made this repair to be done fast.
We used the new Crane Safety Check list from LIGO-E1000379-v1 the first time yesterday before doors were removed.
The control room's north west corner smelled like propane gas yesterday around 16:30
We all agreed that the smell was real and I called the safety office. I was told that they received 6 other calls from different parts of the campus.
The smell disappeared in about a half an hour.
Our visiting graduate student Yuta Michimura received 40m specific basic safety training today.
Accelerometers xyz were moved from IOO-south/west corner to under PSL table. They were turned off for ~20 minutes.
Guralp was also moved eastward about 2 ft. It is not leveled.
This is part of the preparation to remove access connector.
Kiwamu, Koji, Yutah, Rana, Jan and Steve
We removed the west access connector this afternoon.
Our new undergrad Joonho Lee received 40m specific basic safety training yesterday.
Yuta and Joonho are scheduled to participate in the LIGO-laser safety tutelage with Peter K on Oct 12
We got two small RF filter for the PMC from Valera They are made by http://www.larkengineering.com/ "MC35.5-3-AB" sma, 29300-01
The 2 W Innolight shutter is closed and enclosure door removed. Beam path blocked. Do not change this condition.
The PSL output beam guide was upgraded from 2" to 8" OD . It is green ready. Shutter is open.
Prof Alan Weistein guided the 24 student through the 40m. His performance was rated as an enthusiastic 9.5
Innolight PSL laser is set to @2.1A , ~1.6W output ! Please scan out when finished!
The output monitoring pick up window W2-LW-2-2050-UV-1064-45S is in place. IOO_ANG_OPD and IOO_POS_QPD roughly aligned.
The PMC alignment and/ or mode matching is bad. PMC reflected is 50%, throughput 600mW
Remember to block PSL output ! into IFO
This BNC cable is crying for help. Please do not do this to me. It should be reported to the abused center.Throw this cable into the garbage now.
I'm cleaning out to make room for our new optical cabinet. Are we keeping these? There are ~20 pieces of 10" od 1" wide tapes and large number of cassettes.
AJW, Zucker, Stuart A and Koji were notified in this matter.
Alan suggested to save data of Bruce Allen paper of observation of binary neutron stars in the 40m on 1994 November 14-20 and save back up tapes of his period in the 40m.
Mike: reels are not readable any more, it is time to let go
www.avalontest.com has fixed the 25MHz oscillation. Contact: Jim Burnham 760-536-0191
Actually, NOT FIXED.
Fire-smoke sensors in the vertex area #2-31, 2-30 east, 2-32 south/MC2 and 2-37 old control room area are turned off to accommodate the welding
activity of folding crane. These sensors will be reactivated at 3:30pm today.
Stay out of the 40m lab: IFO room till 6 pm today.
The new cord wheel was to big. They be back tomorrow?
The lab is open.
Pedro of the electrical shop helped to retrace wires from the racks to the breakers. Many wrong labels were replaced. These labels are still representing the south arm as Y and the east arm as X.
Racks: 1X1,2,3,4 and 1Y3,4,5,6,7 and 9 are connected through manual disconnect swithes to AC power breaker PC-1 on the west wall of IFO room 104.
This panel PC-1 is connected to T1 isolation transformer in room 101 Panel L - # 38, 40, 42
Racks: 1Y1 & 2 psl and mc are connected through manual disconnect switches to AC power breaker PC-2 just west of the psl enclosure.
This panel is connected to T2 isolation transformer in room 101 Panel L - # 32, 34, 36
Our new postdoc Suresh Doravari received 40m specific safety training last week.
The south end of IFO room 104 was reshuffled. The flow bench was moved all the way to the south end to create more room for the crane reach. The old large drawing cabinet was moved under the vacuum tube.
The new clear view through Acrylic-plexyglass cabinet is anchored. It has powder finished coating so it will not out-gas too much.The back side shelf mounting holes are sealed off with kapton tape. The doors still needs some gaskit seals.
8 pieces of 10" CF blanks were shipped to MIT
Koji, Suresh and Steve,
The beam scanner is back from repair. Koji and Suresh helped to move the I/O address jumpers on the interface card from default position 300 to 320
It is working again.
Physical Electronics: Vac-Seal #288-6000 arriving Monday. Our last bag used last week had a p/n 1002003 with expiration date .....2009 ? and it was stored in the
refrigerator all times. We are getting 68 small bags.
We should have precision gluing notes of epoxies/procedures used on our sus upgrade.
Please remember to cover the optical tables !
This condition is created when we run out of nitrogen that holds the valves in set positions. The Maglev and other turbos are still running in this configuration so one has to pay attention that the foreline valves are open.
Reset error message on vacuum screen and opened V4 & V5 at 3pm today.
Slow pumpdown of rebuilt IFO-mark4 started at 3pm today.
We are at 680Torr at this minute with 1.5 Torr/min speed.
We have reached 200 Torr at 12 hours of slow pumping speed. Kiwamu stopped the pumping for 11 hrs last night .and I restarted it this morning.
Now RV1 is fully open with butterfly valve in place and the second roughing pump RP3 was just turned on.
How to stop pumping:
1, close RV1 manual valve with torque wheel
2, close V3
3, turn off roughing pumps RP1 & RP3
4, disconnect metal hose connection to butterfly valve
The pump down continued this morning by the removal of the butterfly valve. Two roughing pumps were used to reach 500 mTorr
The Maglev monitoring MEDM screen "Rotating" indicator is not working. It is on all times. Please look at Maglev controller monitor for real information.
Pump down is completed.
Configuration: vacuum normal after 86 days at atm CC1 = 1e-5 Torr
IFO is hungry for light (and maybe some goulash with a little paprikash too)
The Watec 902, 1/2" CCD camera got new Tamron lens: 1/2" 10-40mm F/1.4 manual iris. IR corrective lens. It is designed to have the same focal point in the IR as
in the visible light range. However, as the depth of field in the IR range is very narrow, focus adjustment should be done carefully in the IR.
Now you can see the sus tower that will make alignment easier.
Joe updated the rga procedure in the wiki and we turned on the filament. It will take a few days to reach thermal equilibrium.
TP2 dry fore pump was replaced at 910mTorr
The crane people are here. The Vertex chambers are covered with plastic. The PSL HEPAs will be running on high during the day.
It is going to be disturbingly noisy and dirty during the day. Please try start working in the evening if it can not wait till next week.
The upgrade is almost finished. I found that the passive latch lock is not closing down all the way. It has about a 3/8" gap. See Atm. 1 & 2
The service man was here this morning and agreed to fix it. They will be back next week. The latch needs an other spring to push it into full lock.
We tested all possible sequences of operation of the new upgrade. It performed to specification.
I blocked the AP table's south west 10" ID port since it is obsolete with the new layout.
Reminder: items on the enclosure self can fall down in an earthquake. I moved oscilloscope and heavy calorimeter head from the edge of the cliff.
The air condition was off for the south arm. I turned it on.
The RGA scan is normal at day 52 of this pump down.
Light power BS 1064nm ~25mW, ETMX 532nm ~5mW
I set up video monitoring of MC1 and MC3
The #3 enclosure door was removed for the carpenter shop this morning. They will make 5 full size doors with window on each.
TEMPORARY aluminum sheet is clamped into its place. This sheet should not be removed till new doors arrive.
The inside Formica color will be changed from white to black to reduce the green scattering.
The south arm labels were changed from y to x to reflect reality.
So racks, manual disconnects and breakers now have their actual name. The east arm will be changed over tomorrow.
Please remove incorrect labels if you see any !
I can not find 1X4 breaker so it will be traced.
The mechanical assembly of RF distribution box is 99% complete. Some of the components may be bolted to the teflon base plate if needed.
All RF cables and DC voltage supply lines have been installed and tested. I removed the terminal block which was acting as a distribution box for the common zero voltage line. Instead I have used the threaded holes in the body of each voltage regulator. This allows us to keep the supply lines twisted right up to the regulator and keeps the wiring neater. The three regulator bodies have been wired together to provide a common zero potential point.
I did a preliminary test to see if everything is functioning. All units are functioning well. The output power levels may need to be adjusted by changing the attenuators.
The 2x frequency multiplier outputs are not neat sine waves. They seem to produce some harmonics, unlike the rest of the components.
I will post the measured power output at each point tomorrow. The RF power meter could not be found in the 40m lab. We suspect that it has found its way back to the PSL lab.
Frank is recommending these PhaseTrack-210 as phase stable low loss rf coax cables.
Larisa Thorne received 40m lab specific, basic safety training. She will attend P. King's Basic Laser Safety Training Session tomorrow.
Cheater cables for SRM sus tied up. They were dangling aimlessly on the floor.
Uniblitz mechanical shutter was placed into the beam path of the PSL output with razor beam trap. The output power was 1.39W at 2.08A
It is working from the MEDM screen "old map" C1IOO_Mech_Shutter.adl
The beam of IR for doubling is clipping on bnc cable to green beam transmitted pd.
I moved old POX shutter from ITMY optical table to the south end. MEDM POX mechanical shutter screen is now closing the green beam injection into the Y arm.
I kluged in a 40m long bnc cable that Alberto left on the floor for control. It is labelled POX-sht This is a temporary set up.
Ansell AccuTech 91-300 clean room gloves ONLY in the 40m lab.
Cleaning and preparation must be carried out in these gloves also.
We have one single O-ring on the 40m vacuum envelope. It is on the OOC west side, facing the AP table. This O-ring has to be protected from the force of this
door. There should be 3 shims ~120 degrees apart to carry the full load, so it is not the O-ring that is getting squashed.
This morning I found only one of these shims in place.