V1 valve is open to IFO now. V1 interlock will be tested tomorrow.

Valve configuration: VAC NORMAL with CRYO and Maglev are both pumping on the IFO

The IFO RGA scan is normal.

The Cryo needs to be regenerated next. It has been pumping for 36 days since last regenerated.

This has to be done periodically, so the Cryo's  14 K cold head is not insulated by by ice of all things pumped away from the IFO

The 40m lab specific safety training is done. The participants were

Stephanie Erickson, Clara Bennett, Chris Zimmerman, Zach Commings, Michelle Stephen surfs and Drew Cappel  postock.

They have already went through the Caltech Safety Office laser and general safety training.

They still have to read, understand and sign the the SOP for the laser & lab

Joe, Alberto and Steve

We tested gate valve V1 interlock by :

1, decelerated rotation by brake from maglev controller unit.

2, turned maglev  controller off from controller unit.

3, unpluged 220VAC plug from wall socket

None of the above action triggered V1 to close. This needs to be corrected in the future.

The MEDM monitor screen of maglev indicated the correct condition changes.

Alex and Steve,

SunFire x4600 ( not  MEGATRON 2 , it is fb40m2 ) and JetStor ( 16 x 1 TB drives ) were installed on side rails at the bottom of 1Y6

We cleaned up the fibres and cabling in 1Y7 also

The fb40m just went out of order with status indicator number 8

It recovered on its own five minutes later.

 APC Smart-UPS (uninterruptible power supply) batteries RBC12 replaced at 1Y8 vacuum rack.

Their life span were 22 months.

All suspentions are kicked up. Sus dampings and  oplev servos turned off.

c1iscey and c1lsc are down. c1asc and c1iovme are up-down

 I'm impressed by Rana's simple way to align the MC. IFO arms are locked or flashing. 20 days trend attached.

Kevin Vigue, our high school summer student went through the 40m specific safety traning yesterday.

I installed an improvised version of PSL output beam iris at the output periscope last week.

The 40m-IFO vacuum envelope doors are sealed with dual viton O-rings and they are pumped through the annulos lines.

This allows easy access into the chambers. The compression of the o-rings are controlled by the o-ring grooves.

The OOC (output optic chamber)'s west side door has no such groove and it is sealed by just one single O-ring.

We have to protect this O-ring from total compression by 3 shims as shown below.

There were control shims in place before and they disappeared.

Let's remember that these shims are essential to keep our vacuum system in good condition.

IFO pressure was 2.3 mTorr this morning,

The Maglev's foreline valve  V4 was closed so P2 rose to 4 Torr. The Maglev was running fine with V1 open.

This is a good example for V1 to be closed by interlock, because at 4 Torr foreline pressure the compression ratio for hydrocarbones goes down.

V4 was closed by interlock when TP2 lost it's drypump. The drypump's AC plug was lose.

To DO: set up  interlock  to close V1 if P2 exceeds 1 Torr

The Maglev is running on single phase 220V and that voltage  was not interrupted. TP1 was running undisturbed with V1 and V4 closed.

It is independent of the UPS 120V.

The swapped in 307 convectron gauge controller  is very likely to have the  RS232 connection  wired differently from the old one.

PRP gauge has now the same error message as the PTP1:  "no comm"  I would look at RS232 wiring of the PRP gauge on the broken

controller and adapt the swapped in one to communicate. The PRP was reading 620 Torr before the swap.

 The control room desk tops heights on the east side were lowered by 127 mm

The new APC Smart -UPS 2200VA is now running at  the vacuum rack. There are 2 load monitoring leds on out of 5

Maglev, dry pumps and roughing pumps are not using UPS.

The switch over went smoothly with Yoichi's help.

First we closed all vacuum valves and stopped the two small turbos.

Than turned power off to instruments in the vac-rack and VME: c1vac1 & c1vac2

Maglev was left running.

Now we moved the AC plugs from the wall receptacles over to the back of the UPS and powered them up.

Varian turbos were restarted and vacuum valves were restored in order to reach  vacuum normal condition.

See 40m Vacuum System States and Sequences Manual of 10-24-2001

Linux 3 desk top computer is out of order at the pump spool. We should replace it.

The vacuum control screen can be pulled up on a lap top: /cvs/cds/caltech/medm/c0/ve/VacControl_BAK.adj

 Peter King is updating our temp box as Hugh did at Hanford Oct.22 of 2001 I still have not seen an updated drawing of this.

The LT 1021-7 reference chip will arrive tomorrow morning. This modification should be completed by noon.

 ** The link to the DCN from Hugh is here in the DCC.

The reference cavity vacuum chamber temp is plotted starting Feb 22 of 2005

This plot suggest that the MINCO temp controller is not working properly.

 The cavity temp cooled below SP2 set point 0.1  The Minco SP1 (present temp in Volts) now reading -0.037 so DC power supply was turned on and set to 12V 1A  

Old -pre 6/2009  LLO DCPD 3 mm od GTRAN photodiode

I removed POX rfpd to see how it is mounted on its base. It is here on the work bench just in case someone wants to use it the IFO over the week end.

I was told yesterday, that on Friday the construction people accidentally ripped out one of the 40m soil ground.....AND HOW MANY MORE ARE THERE? nobody knows.

It was ~8 ft long and 0.5" diameter buried in the ground. There is no drawing found to identify this exact building ground. They promised to replace this on Wednesday with a 10 ft long and 0.75" diameter.

The  the wall will be resealed where the conduit enters  the  north west corner of the IFO room 104

There should be no concern about safety because the 40m building main ground is connected to the CES Mezzanine step-down transformer.

 I put POX back to it's place with markers. The pd was removed from it's base so it is for sure misaligned.

 Atm1 is showing ground bus under N-breaker panel in 40m IFO room north-west corner.

The second ground bus is visible farther down south under M-breaker panel.

Atm2 is the new ground that will be connected to ground bus-N

The RGA isolation valve VM1 was closed since Aug 24, 2009  I installed the new UPS that time.

The last RGA scan in the log is from Aug 7, 2009   The vacuum rack UPS failed on Aug 15, 2009

I opened VM1 today so we can have ifo rga scan tomorrow.

 You said that the use of FAXST was forbidden for phds and graduate students. I had to swear on the promise of not ever buying an other FAXST

FSS_RMTEMP is moving up and  daily fluctuations  are  less . 120 and 16 days plots are below.

Rob found puddles of water very close to the chiller during lunch time. We raised the unit and took the side cover off. All surfaces were dry and the water level in the tub normal.

Later on we discovered that one of the Vons distilled water bottle was leaking. Jenne and I checked for excess amount of condensing water droplets inside the MOPA box.

On the bare,not insulated tubing and valve are loaded with droplets of water. Relative humidity is 44% at 24 C and HEPA filter speed set to 80 V in the enclosure.

Earthquake  of magnitude 5.0  shakes ETMY loose.

MC2 lost it's damping later.

 The EQ did not change the input beam pointing. All back to normal, except MC2 wachdogs tripped again.

Awesome 5 hrs of locking  Rob!

Pointing stability of 4 days. Initial pointing does not go through suspended optics. It is launched  right after the Piezo Jena steering mirrors in the BS chamber.

IP-ANG on epics screen is  C1:ASC-IBQPD_X and Y in dataviewer  were recentered. This beam is clipping a bit in ETMX chamber  pick off mirror.

IP-POS pick  off is in the BS chamber and it's qpd on the BS_ISCT This beam is also clipping just a little bit. This is easy to fix. We'll have to remove an iris from the BS optical levers table.

note: arms were not locked when I recentered

Kiwamu, Alex and Zach are practicing mandatory IR-safety scan at the 40m-PSL

40m specific safety indoctrination were completed.

Initial pointing beam is clearly clipping on 2" pick off mirror in  ETMX vacuum chamber.

Atm. 1  The pick off mirror is just north west of the ETMX test mass

Atm. 2 The camera is looking in from the north view port of ETMX chamber. The back side of pick off mirror is visible now with the face view of the "IP-ANG-OUT" mirror.

 IP-ANG clipping can be traced back to our last vent of Aug. 18, 2008  See elog entry #845

This was an after earth quake - sus repair vent

Pump down #66 is 435 days old. RGA scan is normal. New maglev is fine. New UPS is in place but not hooked up to communicate.

V1 has bare minimum interlock. Pirani vacuum gauges  PTP1 and PRP do not communicate with readout system.

There is no emergency dial out in case of vacuum loss.  Our existing vacuum dedicated desk top computer is dead.

New cold cathodes, Pirani gauges and gauge controller should be added.

In general: vacuum system needs an upgrade !

The laser power is down 5-6%

The PMC power is seems to be on the rise, ( MOPA_AMPMON is dropping ?) but I do not think it is real. We have Santa Anna wind condition, when the relative humidity drops and  ......

There is an other funky think. The room temp became rock solid. The PSL HEPAs running at 20% and IFO-room ACs are also in normal operational mode.

Illuminators and PSL lights turned off.
HEPA filter speed increased from 20 to 100%

 Koji did a nice job increasing light power with some joggling.

The RFMnetwork is down.  MC2 sus damping restored.

The PSL enclosure HEPAs turned on at 30%

MC2 damping restored,  MZ locked and the arms are flashing now.

RFAMPD_DCMON disappered on Nov 5, 2009

The concrete  floor cutting has begun next door at CES

ATM1: Seismometers are saturating, suspensions are OK

Atm2 : activity next door,  diesel Backhoe and diesel concrete cutter are running

Atm3: CES exhaust fans output  is pick up by 40M-Annex-North AC unit  intake. The 40m office room has some diesel smell...........see # 2377

I added ~500 cc of distilled water to the laser chiller yesterday.