Corrected oplev laser RIN plot at day 3

RXA:

1. to measure RIN, the lever arm should be really short, not long.
2. the beam should be 3x smaller than the active area of the diode
3. the specular beam should be dumped on a razor dump.
4. we need to make a summary page for HeNe laser testing so that we can see 24 hour specgrams of these things for ~3-4 lasers at the same time.
5. We should add specgram stuff for the existing HeNe SUM channels on the active OLs.

GV: The channel the PD Steve is using is hooked up to C1:ALS-FC_X_F_IN. As I found out today, there can be considerable RF pickup between the C1:ALS-FC_X_F_IN and C1:ALS-FC_Y_F_IN channels, which share a common 4-pin LEMO cable - this is because the rise time of the square wave output of the Wenzel dividers is <1us, so suitability of this particular channel for the RIN measurement set up has to be reconsidered. Perhaps we can use one of the six spare PEM channels over at 1X6. 

All 3 cranes inspected by professional Fred Goodbar of Konecranes and load tested with 450 lbs at max reach on Friday, March 3, 2017

16 years old Lightwave NPRO M126-1064-700, sn 415 power output is tripping continously to zero.

The Lightwave Controller 125/126-OPN-POS sn516 was used in this test. Settings were lowered to close to nominal values without any success.

One can not determine what is broken: head or controller. This NPRO head was under Manasa's desk.
 

Property tag found.

Gautam and Steve,

We did the following:

1, switched data channel  from  C1:ALS-FC_X_F_IN to C1:PEM-MIC_1_OUT_DQ   Actual connection at 1X7 rack, input C17

    Tested channel with 1Hz, 100 mV sine wave through DV

2, placed BS into the beam path so the reflected value on the PDA100A 0.1mW,  beam od ~1mm, beam path lenght 11 cm, gain 20dB 3.7Vdc

    The full output of this 1103P 2.8 mW was saturating the PDA100A

Summery :finding it to be too good to be this good

I removed the video monitoring can and replaced it with Olympus SP-570UZ camera. It has no IR blocker. The OSEM light are dominant because I can not zoom in more.

I left the camera in place so you can try it. Leave the LEXAN plate on the glass window so no accident can happen. The illuminator is on and you can turn it off-on with the manual switch, close to the camera. Camera manual is on my desk.

Your technique works Koji

The east end AC unit is arching over and running rough at CES. Called for mechanic.......

Both belts were replaced and the unit is running happily.

ETMX oplev laser is dead. It will be replaced this after noon. Sus damping recovered.

We have 50 pieces in the clean cabinet.

This 3 years old HeNe [ JDS 1103P, sn 351889 ]  has been dying for some time or just playing possum at age 1,126 days

I did not replace the ETMX oplev laser because I was unable to bring up the the C1ASC_ETMX_OPTLEV_SERVO  medm screen on laptops.

Finally I see what kicks the sus damping off

JDSU 1103P. sn T8070866, made March 2007, output power 2.7 mW,  on pd 17,750 counts,

GV 17 March 3pm: I found the Innolight NPRO was off when I walked down to the X end earlier, possibly was accidentally tripped during the Oplev laser replacement. I turned it back on.

         March  17,  2017         ETMX laser replaced at LT 3y with 1103P, sn T8070866

Some one turned up the PSL HEPA rotation voltage from 20 V to 33 ( 120V Variac ) and  X-arm AC set temp lowered to 68F

Effects at 12" height from optical table :

                                                            1.0, 0.5 & 0.3 micron particle count  goes to zero and temperature fluctuaion increased

Rotation speed voltage was set to 30V

The X arm air conditioner was not regulating properly. The arm temp was warmer than usual. I requested thermistor calibration.

The mechanic reset the thermostate to 68F last week.  It was 70-71F before.

The ETMX oplev laser now running 4 C lower at 30 C inside the enclousure.

The ETMX optical table top is 5 C cooler  at 21 C

The ETMX concrete wall temp 20 C at 9am with flow bench on.

ETMY conrete wall  temp 23 C at 9am

Three replacement bulbs ordered

Rana can discribe how it happened.

IF A LAMP EXPLODES

The summery pages are working at a slow motion speed. It's response time 12 minutes.

Laser safety glasses cleaned in " Dawn Ultra " mild soap - water solution and measured for 1064 nm transmission at 150 mW
 

Les Guthman interviews  gradstudent Graig.

Main laser emergency shut off was acuated by accident during this fiming. The laser is turned on.

Shipped out for repair.

It is back and running fine witth bulb  4-13-2017

Building:         Central Engineering Services

Date:             Monday, 04/10/17          

Time:             7:00 AM TO 9:00 AM           

Notification:     Crane Activity

Contact:          Ben Smith, X-4190 Brad Nielsen, X-8751

Contractors will be removing the large vaporizer located on the South

side of CES. Vehicle access will be restricted due to crane placement

and operation, but there will be a single traffic lane available. This

work may create minor noise and vibrations.  

ETMX enclosure feedtrouh cabeling corrected.

We are planning to test 3 identical 1103Ps RIN with  continous temp monitoring and control later.

Selected  temp sensor   Platinum RTD 1PT100KN1515CLA   or           RTD-830 

Temp controller  with analoge output 0-10Vdc, CNi854  and external dc pulse driven  relay

Order placed 4-12-17 for sensor  RTD-830,  controller CNi8-5-4 and relay  SSRL240DC25 = ~$500.

Still need: fuse, fuse housing, on/off switch, female  AC receptical, chassy box and AC power cord.

    Jan. 26,  2017              RIN test stared with P947034, made Apr. 2016  

    Apr.  10,  2017              purchased two 1103P from Edmund:  sr P964438 & sr P964431, made 02/2017

Why ITMY UL can not see this earth quake? SRM and PRM are misaligned. ETMX is still not well.

We have to remember to check OSEM - magnet alignment when vented.

Yesterday I failed to take good pictures of ETMY  resonant arm of 1064 nm with Cannon Rebel T3i in RAW 22-27Mp & JPG dual- format. UFRaw file converter worked well. The IR blocker filter seems to be too good.

Today I used Olympus SP-570UZ ( without IR blocker), in raw format of 15Mp, fl 22.4mm, 15s including 2-3s flashlight,  f/8 and auto focus  This is just too much scattered IR for the Olympus.

Overexposed raw picture' jpg is shown  at the PSL with diffraction patter of the camera.

I'll go back using  the Nikon D40 with zoom 55-200mm as this Atm2 of May 2007 : manual focus, 15s, f/4-5.6, ISO 560,  826KB

MC2 ccd camera is replaced by Olympus 570 zoom temporarly.

So as the ETMY ccd camera is replaced by Cannon Rebel.

Both viewport are under Lexan protection and covered by Aluminum foil....still, turn all lighting off if you do not want room light in the IFO

Do not remove Lexan shield!

One is broken, two are ready to steer green and 3 available in un known condition

Freshmen Rebecca Zhang as " work study undergrad "  received 40m specific basic safety training yesterday.

Olympus SP570 UZ - without  IR blocker, set up as Atm.3  Camera distance to MC  face ~85 cm,  IOO-MC_TRANS_SUM 16,300 counts, Lexan cover on not coated viewport.

Image mode: RAW + JPG,  M-costum,  manual focus,  Lens: Olympus 4.6 - 92 mm, f2.8 - 4.5,  Apeture: F2.8 - 8,  Image pick up device: 1/2.33" CCD (primary color filter)

Atm.1,       212k.jpg of raw 15 MB,  exp 0.025s,   apeture 2.97,  f 4.6,   iso 64,  

Atm.2,        Copied through my Cannon S100  (  3.3 MB.jpg of raw from UFraw photo shop )I will look up the original raw file for details.

Gautam and Steve,

Surge protective power strip was install on Friday, May 5 in the Control Room

Computers not connected to the UPS are plugged into Isobar12ultra.

 Early surfs of India Jigyasa and Kaustubh received basic 40m specific safety traning.

Sus dampings recovered. ETMY oplev needs to be recentered.

GV May 17 11am: I shut down the BS, SRM, ITMX and ITMY watchdogs, as the coil-driver boards for these optics are presently not installed.
 

Olympus camera is removed and our old CCD camera is back to monitor the face of MC2

You may compare your results with this.

RXA: please no, that's not the right way

Finally I reallized what is killing the ETMY oplev laser. Wrong  power supply, it  was driving the HeNe laser by 600V higher voltage than recommended. Power supply 101T-2300Vdc replaced by 101T-1700Vdc ( Uniphase model 1201-1, sn 2712420 )

The laser head 1103P, sn P947049 lived for 120 days and it was replaced by sn P964431   New laser output 2.8 mW,  quadrant sum 19,750 counts

Ruby wire standoff received from China. I looked one of them with our small USB camera.  They did a good job. The  long edges of the prism are chipped.

The v-groove cutter must avoid them. Pictures will follow.

Atm 1 & 5, showing the ruby R ~10 mm as it is seated on Al SOS test mass

Atm. 2, 3 & 4  chipped long edges with SOS sus wire OD 43 micron as  calibration

50mm 1.8 lens with Basler camera at MC2 face with micro clamp 350617    Camera manuals plus

The Y arm ac thermostate was calibrated after cooling water relay replacement by Mike.... yesterday. The set temp is remaind to be 70F

The east end south wall temp is reading 22C

Gautam and Steve,

The medm monitor & vac control screens were totally blank since ~ May 24, 2017    Experienced vacuum knowledge is required for this job.

IDENTIFY valve configuration:

                        How to confirm valve configuration when all vac mons are blank?  Each valve has a manual-mechanical position indicator. Look at pressure readings and turbo pump controllers. VAC NORMAL configuration was confirmed based on these information.

Preparation: disconnect valves ( disconnect meaning: valve closes and stays paralized ) in this sequence VC2, VC1 power, VA6, V5, V4 & V1 power,      at ifo pressure 7.3E-6 Torr-it  ( it  = InstruTech cold cathode gauge )

                            This gauge is independent from all other rack  mounted   instrumentation and it is still not logged.

                            Switching to this valve configuration with disconnected valves will insure NOT  venting of the vacuum envelope by accidental glitching voltage drop or computer malfunction.

RESET  v1Vac1 .........in 2-3 minutes........ ( v1Vac1 - 2 )  the vac control screen started reading pressures & position

                    Connected cables to valves (meaning: valve will open if it was open before it was disconnected and it will be control able from computer ) in the following order: V4, V1 power, V5, VA6, VC2 & VC1 power,      at ifo 2E-5 Torr-it.....

                     ....vac configuration is reading VAC NORMAL,

                     ifo 7.4E-6 Torr-it

We have to hook up the it-cold cathode gauge to be monitored - logged !  this should be the substitute for the out of order CC1 pressure gauge.

Last good page May 18, 2017

Not found, error message May 19 - June 4,2017

Blank plots,  June 5, 2017

Randy Trudeau scanned our Window laptop Dell 13" Vostro and Steve's memory stick for virus. Nothing was found. The search continues...

Rana thinks that I'm creating these virus beasts with taking pictures with Dino Capture and /or Data Ray on the window machine........

We should move on with getting this lens from Edmonds #67-717  at 1064 R<3% 

Computar M5018-SWIR is an other choice

AR coatings 500 - 1100nm R<1% are expensive.

Happy MC after last glitch at 10:28 so the credit goes to Rana

GV edit 11:30am: I think the stuff at 10:28 is not a glitch but just the WFS servos coming on - the IMC was only hand aligned before this.

GigE can be connected to ethernet. AR coated 1064 f50 can arrive any day now.

The liquid nitrogen container has a pressure releif valve set to 35 PSI  This valve will open periodically when contains LN2

The exiting  very cold gas can cause burning so it should not hit directly your eyes or skin.  Set the pointing of this valve into the corner.

Leave entry door open so nitrogen concentration can not build up.