40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 251 of 339  Not logged in ELOG logo
ID Date Author Type Categoryup Subject
  11757   Thu Nov 12 10:22:33 2015 SteveUpdatePEMpossible vibration for 4days

Building:         San Pasqual walkway East to West

                  (Between Holliston & Wilson)         

 

Date:             Thursday 11-12-15 to Wednesday 11-18-15

 

Time:             Between 6:00 a.m. and 4:00 p.m. each day        

 

Notification:     Possible Noise Vibration

 

Contact:          Ken Lewis (626) 298-2037       

 

* Plumbing contractor will be inspecting and water jetting Storm drains

Type of interruption: (Some vehicle noise and small vibrations limited to close surrounding area)

Areas effected: San Pasqual walkway from Holliston Street to Wilson)

Potential effects: storm drain loss of use

Reason for interruption: Storm drain cleaning in preparation for rainy season

 

  11895   Mon Dec 21 14:31:41 2015 SteveUpdatePEMRat traps set

Two mechanical and two sticdky traps were set to catch univited visitor.

Absolutely no food or food remains into inside garbage cans!!!!!!!!!!!!!!!!!!!!!!!!!

Quote:

A small rat / large mouse just ran through the control room. Ugh.

 

Attachment 1: ratsNC.jpg
ratsNC.jpg
  11909   Tue Jan 5 09:48:52 2016 SteveUpdatePEMRat trap moved

Our janitor confirmed that Q was not hallucinating about this animal. The dropping size indicating a good size one in the IFO room.

One of the mechanical traps moved from the control room to the east arm, close to the " machine shop " door.

I'm going to get more traps.

Quote:

Two mechanical and two sticdky traps were set to catch univited visitor.

Absolutely no food or food remains into inside garbage cans!!!!!!!!!!!!!!!!!!!!!!!!!

Quote:

A small rat / large mouse just ran through the control room. Ugh.

 

 

  11914   Wed Jan 6 08:09:04 2016 SteveUpdatePEM4.5 Mag Banning EQ

IFO restored after 4.5 Mag Banning, Ca earthquake.

Attachment 1: 4.5Mag__Banning.png
4.5Mag__Banning.png
  11928   Tue Jan 12 08:40:06 2016 SteveUpdatePEMAir cond maintenance

Air condition maintenance is happening. It should be done by 10am

  11949   Mon Jan 25 11:06:08 2016 SteveUpdatePEMnoisy fan belt replaced

The noisy fan belt on the roof of the control room was finally replaced on Friday, Jan 22 2016

Quote:

Air condition maintenance is happening. It should be done by 10am

 

  11950   Tue Jan 26 15:07:47 2016 SteveUpdatePEMaccelerometers moved to ETMX

Objective:  measure the noise floor on the optical table and the floor so we can decide if the table needs better anchoring before swapping in

                   the larger optical table

The accelerometrs labeled as MC1 ( just north east  of IOO chamber floor ) and MC2 ( north east leg of MC2 table floor ) were moved:

MC1 to the floor at the north west leg of optical table.

MC2 is in the north east corner of the optical table

Atm2 was taken after table leg bolts were tighed at 40 ft/lb

The spectrum looks similar to ETMY     (Guralp for below 3 Hz )  except  the Z direction 

ETMY  .

Attachment 1: ETMX_floor_vs_optab.png
ETMX_floor_vs_optab.png
Attachment 2: ETMX_floor_vs_optabtop.png
ETMX_floor_vs_optabtop.png
  11952   Wed Jan 27 08:17:38 2016 SteveUpdatePEMETMX floor vs table noise

 

Quote:

Objective:  measure the noise floor on the optical table and the floor so we can decide if the table needs better anchoring before swapping in

                   the larger optical table

The accelerometrs labeled as MC1 ( just north east  of IOO chamber floor ) and MC2 ( north east leg of MC2 table floor ) were moved:

MC1 to the floor at the north west leg of optical table.

MC2 is in the north east corner of the optical table

Atm2 was taken after table leg bolts were tighed at 40 ft/lb

The spectrum looks similar to ETMY       except  the Z direction 

ETMY .

Conclusion: up to 20 Hz this set up is good.

Attachment 1: ETMX_X_floor_vs_table.png
ETMX_X_floor_vs_table.png
Attachment 2: ETMX_Y_floor_vs_table.png
ETMX_Y_floor_vs_table.png
Attachment 3: ETMX_Z_floor_vs_table.png
ETMX_Z_floor_vs_table.png
Attachment 4: MC1@ETMX.jpg
MC1@ETMX.jpg
Attachment 5: MC2@1Winno.jpg
MC2@1Winno.jpg
Attachment 6: MC2@ETMXtable.jpg
MC2@ETMXtable.jpg
  11954   Wed Jan 27 20:51:00 2016 ranaUpdatePEMETMX floor vs table noise

I didn't really appreciate this measurement until just now. IF you can save the DTT .xml file with all the traces in it (i.e. NOT just the plots), we should save this data for comparison plotting later. Perhaps Gautam can post the gzipped xml file for you into the log.

The accelerometers don't read any real noise below ~3 Hz, so we can't judge the difference down low, but this seems like a good measurement in the 5 - 100 Hz band.yes

  11955   Wed Jan 27 23:14:25 2016 gautamUpdatePEMETMX floor vs table noise
Quote:

I didn't really appreciate this measurement until just now. IF you can save the DTT .xml file with all the traces in it (i.e. NOT just the plots), we should save this data for comparison plotting later. Perhaps Gautam can post the gzipped xml file for you into the log.

The accelerometers don't read any real noise below ~3 Hz, so we can't judge the difference down low, but this seems like a good measurement in the 5 - 100 Hz band.yes

Unfortunately I had closed all the DTT windows that Steve had used for the earlier plots. So I took the spectra again - there may be minor differences given that this measurement was taken at ~11pm at night. Anyways, plots and the xml data file are attached.  

 
Attachment 1: X_end_ACC_Data.png
X_end_ACC_Data.png
Attachment 2: X_End_ACC_Data.xml.tar.gz
  11959   Fri Jan 29 08:18:13 2016 SteveUpdatePEMPEM

 

Quote:

Air condition maintenance is happening. It should be done by 10am

 

Attachment 1: PEM.png
PEM.png
  11965   Mon Feb 1 09:16:32 2016 SteveUpdatePEMRat got cut

We got it! Traps are removed.

 

Attachment 1: bingo.jpg
bingo.jpg
Attachment 2: bingo3.png
bingo3.png
  11966   Mon Feb 1 14:08:06 2016 SteveUpdatePEMroof condtion is good

It rained hard yesterday. We have not had this strong downpoor for years. We got 0.7" and the roof did not leak.

  12000   Fri Feb 19 15:12:38 2016 KojiSummaryPEMGuralp Health Check

I measured the guralp raw outputs and the TFs using the handheld unit and an FFT analyzer.

[Setup]

The handheld unit was connected to each guralp with the same cable which is confirmed t be functional with the Yend Guralp.

The signal for Z, N, and E directions are obtained from the banana connectors on the handheld unit. Each direction has mass, low gain velocity, and high gain velocity output. The PSDs of the signals were measured with an FFT analyzer. The transfer function from the mass signal to the low/high gain signals were also measured for each direction.

The adjustment screw for the E output of the Xend does not work. I had to tilt the Xend Guralp using the leg screws to bring the E signal to zero.

[Result]

Attachment 1: Raw voltage PSD for all outputs
Attachment 2: Comparison of the low gain vel outputs

- All of the mass output show similar PSDs.
- Low gain velocity outputs shows somewhat similar levels. I still need to check if the output is really the ground velocity or not.
- High gain velocity outputs are either not high gain, broken, or not implemented.

- We need to calibrate the low gain output using signal injection, huddle test, or something else.

Attachment 3: TFs between each mass output and the low or high gain outputs

- TFs between the mass signal and the low vel signals show the similar transfer functions between the channels.
- The high gain outputs show low or no transfer function with regard to the mass signals.
 

Attachment 1: Guralp_Raw_PSD.pdf
Guralp_Raw_PSD.pdf
Attachment 2: low_vel_comparison.pdf
low_vel_comparison.pdf
Attachment 3: Guralp_TF.pdf
Guralp_TF.pdf
  12031   Fri Mar 11 16:52:53 2016 SteveUpdatePEMleaky roof

Johannes found dripping water at the vac rack. It is safe. It is not catching anything. Actual precipitation was only 0.62"

Attachment 1: leakyRoof.jpg
leakyRoof.jpg
Attachment 2: leakyRoofA.jpg
leakyRoofA.jpg
  12044   Wed Mar 23 15:23:12 2016 SteveSummaryPEMGuralps as connected

We have one calibration sheet of GUR- B, from 26 June 2008,    model CMG-T40-0008,  sn T4157       at  ETMY  east,  interface box input 1

I'm looking for calibration paper of GUR- A,                                model CMG-T40-0053,  sn T4Q17      at ETMX   south, interface box input 2

Quote:

I measured the guralp raw outputs and the TFs using the handheld unit and an FFT analyzer.

[Setup]

The handheld unit was connected to each guralp with the same cable which is confirmed t be functional with the Yend Guralp.

The signal for Z, N, and E directions are obtained from the banana connectors on the handheld unit. Each direction has mass, low gain velocity, and high gain velocity output. The PSDs of the signals were measured with an FFT analyzer. The transfer function from the mass signal to the low/high gain signals were also measured for each direction.

The adjustment screw for the E output of the Xend does not work. I had to tilt the Xend Guralp using the leg screws to bring the E signal to zero.

[Result]

Attachment 1: Raw voltage PSD for all outputs
Attachment 2: Comparison of the low gain vel outputs

- All of the mass output show similar PSDs.
- Low gain velocity outputs shows somewhat similar levels. I still need to check if the output is really the ground velocity or not.
- High gain velocity outputs are either not high gain, broken, or not implemented.

- We need to calibrate the low gain output using signal injection, huddle test, or something else.

Attachment 3: TFs between each mass output and the low or high gain outputs

- TFs between the mass signal and the low vel signals show the similar transfer functions between the channels.
- The high gain outputs show low or no transfer function with regard to the mass signals.
 

 

Attachment 1: GUR_A.jpg
GUR_A.jpg
Attachment 2: GUR_B.jpg
GUR_B.jpg
Attachment 3: GUR_Interface_Box.jpg
GUR_Interface_Box.jpg
  12046   Thu Mar 24 08:20:52 2016 SteveUpdatePEMGuralp-A calibration sheet

Calibration Data

All Guralp instruments and digitisers are provided with calibration documentation. Should you require a copy of calibration information for any product, email caldoc@guralp.com with the serial number of the product in the subject field and calibration information will be sent to you through email.

See data in the 40m wiki

 

  12047   Fri Mar 25 19:17:28 2016 NikhilUpdatePEMGuralp Seismometers

Calibration of Guralp Seismometers

Objective

  • Estimate transfer functions of Guralp A ( near ETMX) and Guralp B ( near ETMY)
  • Calibrate the instruments by estimating Velocity Sensitity Parameter
  • Convert previously measured Voltage Spectrum to Velocity Spectrum

Instruments Used

  • Guralp CMG-40 T Seimometers  : Guralp A (Serial Number: T4Q17)
  • Guralp CMG-40 T Seimometers  : Guralp B (Serial Number: T4157)
  • Guralp Handheld Control Unit (HCU)
  • FFT Spectrum Analyzer: Model SR785: 2 Channel Dynamic Signal Analyzer
  • Oscilloscope: TDS 3014B
  • Function Generator: DS 345

Procedure & Results

Sinusoidal current of known frequency and amplitude was injected to the Seismometer calibration coil using signal generator and handheld control unit & corresponding Magnitude and Phase response were recorded.  For  Guralp B, system response was also estimated with a FFT Spectrum Analyzer. 

 

    

Frequnecy Range: 0.1 Hz to 45 Hz.

Equivalent Input Velocity was derived from the Input Voltage measurements using the relation: v = V/ (2*pi*f*R*K) , V is the peak to peak Calibration Signal voltage, f is the calibration signal frequency, R is the calibration resistor and K is the feedback coil constant.  [See Appendix for R & K values]                                     

Velocity Sensitity at the required frequency is obtained by dividing the Output Response Voltage by the Equivalent Input Velocity.

               

The obtained Velocity Sensitivity is used to convert the recorded Volatge PSD to Velocity PSD as shown below. The obtained results are compared to gloabl high noise model [NHNM] and USGS New Low Noise Model [NLNM,Peterson 1993] which gives the lowest observed vertical seismic noise levels across the seismic frequency band. Plot legend NLNM shows both the high & low levels.

 

                                                                    Guralp A [X Arm] Low Velocity Output                                          

                  

                                                                    Guralp B [Y Arm] Low Velocity Output                                          

            

                                                                            DTT Power Spectrum                                                             

Both the Seismometers were connected to the 40 M Control and Data Acquisition System (CDS) and Power Spectrum was estimated for the Vertical, North/South & East/West Channels using Diagnostic Test Tool (DTT) software.

                                                            

Comments

  •  The transfer function from Guralp A [ETMX] looks similar to that of Guralp B [ETMY] in both magnitude and phase but with a lower gain.                                                                                                                                                                                                  
  • Velocity Sensitivity of Guralp A is comparable to the value provided in the Calibration Data Sheet [~ 400] for all the channels [Vertical, North/South, East/West] after 1 Hz. For Guralp B, Velocity Sensitivity is a factor of 2.5 higher [all channels] than the specification [~ 400] after 1 HZ.Below 1 Hz Sensitivity drops down for both sensors. I am not ruling out a missing common factor in the calculation, but anyway, test shows that Guralp B has ~2.5 times better Velocity Sensitivity than Guralp A.                                                                                                                                                               
  • The Calibrated Seismic Velocity Spectrum for Guralp B is within the Globally Observed High and Low Noise Seismic Spectrum while Guralp A's Spectrum is more noisier above 1 Hz [Anthropogenic Activity normally contributes the most in 1 Hz to 10 Hz frequency band].                                                                                                                                                                                                                                                                          
  • Concurrently acquired Power Spectrum using DTT [Diagnostic Test Tools] shows that Guralp A Spectrum behaves rather strangely. The system response seems to be completely different from the one we obtained locally using signal generator. While Guralp B functionality seems normal. One reason for this erratic beahvior might be faulty cables used for data acquisition from Guralp A. This needs to be verified.                                                                                                                        

Appendix

                                                                            CMG-40T Guralp A Calibration Sheet                                                           

  Velocity Output: V/m/s (Differential) Mass Position Output (Acceleration Output) : V/m/s^2  Feedback Coil Constant : Amp/m/s^2
Vertical 2 x 400 19 0.00397
North/South 2 x 398 23 0.00486
East/West 2 x 401 23 0.00479                 

Calibration Resistor: 51000

                                                                            CMG-40T Guralp B Calibration Sheet                                                           

  Velocity Output: V/m/s (Differential) Mass Position Output (Acceleration Output) : V/m/s^2  Feedback Coil Constant : Amp/m/s^2
Vertical 2 x 401 19 0.00408
North/South 2 x 400 20 0.00421
East/West 2 x 404 22

0.00466

Calibration Resistor: 51000 

Attachment 3: VelSens_XArm_Guralp_A.png
VelSens_XArm_Guralp_A.png
Attachment 4: VelSens_XArm_Guralp_A.png
VelSens_XArm_Guralp_A.png
Attachment 5: VelSens_YArm_Guralp_B.png
VelSens_YArm_Guralp_B.png
Attachment 8: Vel_PSD_XArm_GurB_E.png
Vel_PSD_XArm_GurB_E.png
Attachment 9: Vel_PSD_XArm_GurB_N.png
Vel_PSD_XArm_GurB_N.png
Attachment 16: Guralp_PowerSpectrum.pdf
Guralp_PowerSpectrum.pdf
  12048   Fri Mar 25 23:54:04 2016 ranaUpdatePEMGuralp Seismometers

Something seems not right. The Guralp response should be flat in velocity from 0.05-30 Hz. Why is there any feature at 1 Hz? Saturation of some kind?

  12084   Wed Apr 20 14:36:45 2016 SteveUpdatePEMdusty lab

It is worth wiping table top covers. Use isopropanol soaked lint free wipes.

 

Attachment 1: AP_accm.jpg
AP_accm.jpg
Attachment 2: wiped_AP.jpg
wiped_AP.jpg
Attachment 3: temp-partic_6months.png
temp-partic_6months.png
Attachment 4: 3_years_PEM.png
3_years_PEM.png
  12087   Fri Apr 22 13:58:13 2016 SteveUpdatePEMleaky roof is fixed

Dan sealed the leak today.

 

Attachment 1: leakyRoof_(2).jpg
leakyRoof_(2).jpg
  12096   Thu Apr 28 08:49:47 2016 SteveUpdatePEMpossible noise sources schedule

Building:         Campus (see attached Map)        

       

Date:              Manhole 1 - May 3 through May 5

Manhole 2 – May 6 through May 10

 Manhole 2 - May 16 through May 19

Manhole 3 – May 11 through May 19           

          

Time:              Noise:  7:00 a.m. To 5:00 p.m.

                  Access: 24 Hours a day

           

Interruption:      Noise/Vehicular & Pedestrian Access

                  Storm Drain Manholes

         

*In order to repair 3 manholes associated with a large storm drain that runs north-south through the campus, work will take place at the

3 manholes shown on the map. This work will interrupt vehicular and pedestrian access on the paths adjacent to the manholes. Though the work at Manholes 1 and 2 will allow vehicular and pedestrian access around the manholes, the work at Manhole 3 will completely block the driveway running south from the southeast corner of Parking Lot 11. Noise will also be created by the repair

 

 

Attachment 1: Campus_B&W_Map-2.pdf
Campus_B&W_Map-2.pdf
  12209   Tue Jun 21 14:12:10 2016 SteveUpdatePEM vacuum envelope wiped

I wiped down the cranes with wet towel and Mario our janitor did the chamber tops with the tubes.

The optical tabels were not touched.

The outside temp peaked at 44 C yesterday

 

Attachment 1: 60dPEM.png
60dPEM.png
  12318   Thu Jul 21 08:24:20 2016 SteveUpdatePEMants alart

The heat drives the ants to the lab!  Make sure the light doors are tight on the chambers.

 

Attachment 1: ants_Alart.jpg
ants_Alart.jpg
  12365   Wed Aug 3 14:52:37 2016 SteveSummaryPEMGuralps as connected

Guralps as connected with pictures

  12383   Mon Aug 8 10:35:12 2016 SteveUpdatePEMvent 78 day 38

 

Quote:

RGA background scan

Quote:

Vacuum Status: Chamber Open

All chamber annuloses are vented.  Vac Monitor screen is not communicating with gauges. The valve position indicator are working.

RGA is pumped by Maglev through VM2

 

 

 

Attachment 1: Vent38days.png
Vent38days.png
Attachment 2: vent78d40RgaBg.png
vent78d40RgaBg.png
  12406   Fri Aug 12 21:26:28 2016 ranaUpdatePEMMic Self Noise

Seems to good to be true. Maybe you're over fitting? Please put all the traces on one plot and let us know how you do the parameter setting. You should use half the data for training the filter and the second half for doing the subtraction.

  12408   Mon Aug 15 12:23:56 2016 PrafulUpdatePEMMic Self Noise

I didn't have a separate training set and data set, so I think that's why the graphs came out looking too good. The units on the graphs are also incorrect, I was interpreting PSD as ASD. I haven't been able to get my Wiener filtering code working well- I get unreasonable subtractions like the noise being larger than the unfiltered signal, so Eric showed me this frequency-dependent calculation described here: https://dcc.ligo.org/LIGO-P990002

This seems to be working well so far:

freq1.pdf

freq2.pdf

freq3.pdf

Here's all the plots on one figure:

frequency_dependent.pdf

Let me know if this looks believable.

Quote:

Seems to good to be true. Maybe you're over fitting? Please put all the traces on one plot and let us know how you do the parameter setting. You should use half the data for training the filter and the second half for doing the subtraction.

 

Attachment 1: freq1.png
freq1.png
Attachment 2: freq1.pdf
freq1.pdf
Attachment 4: freq2.pdf
freq2.pdf
Attachment 6: freq3.pdf
freq3.pdf
Attachment 8: frequency_dependent.pdf
frequency_dependent.pdf
  12429   Mon Aug 22 16:33:32 2016 SteveUpdatePEMthe lab temp is up

The IFO room temp is up a bit and it is coming down. The out side temp is not really high.

Attachment 1: temp.png
temp.png
  12431   Mon Aug 22 18:35:16 2016 PrafulUpdatePEMthe lab temp is up

The temperature is decreasing slowly but is still above 24 C.

temp_plot.png

Quote:

The IFO room temp is up a bit and it is coming down. The out side temp is not really high.

 

Attachment 1: temp_plot.png
temp_plot.png
Attachment 3: temp_plot.png
temp_plot.png
  12498   Fri Sep 16 14:15:28 2016 steveUpdatePEMpartical counts

South end flow bench and both clean room assembly flow benches measured zero counts for 0.3 and 0.5 micron size particales.

The counting efficiency of 0.5 micron is 100%

 

  location

 

 

        0.3 micron particles / cf min

 

 

      0.5 micron particles / cf min

 

 

 counter

 MET

 ONE

 

       effect
 ITMY table  35,000  3,000   #3  
 ETMY table  35,000  3,000   #3  
 ITMX table  24,000  2,400   #3  PSL HEPA at 50V
 ITMX wall mounted  -  2,500   #1  
 ETMX work bench    5,000     600   #3   flow bench on  

 

The PSL HEPA performance was measured at the center of the table with MET ONE #3

 Voltage Variac particles /cf min   particles /cf min
 particle size  0.3 micron  0.5 micron
 60  0  0
 50  10  0
 40  1,400  110
 20  1,400  100
Attachment 1: 80days.png
80days.png
  12538   Fri Oct 7 15:36:03 2016 SteveUpdatePEMthe lab temp is up

The IFO room temp is up

Quote:

The IFO room temp is up a bit and it is coming down. The out side temp is not really high.

 

Attachment 1: tempUp.png
tempUp.png
Attachment 2: PEM4d.png
PEM4d.png
  12558   Thu Oct 13 14:49:57 2016 KojiConfigurationPEMXLR(F)-XLR(M) cable took from the fibox to the Blue microphone

[Gautam Koji]

XLR(F)-XLR(M) cable for the blue microphone is missing. Steve ordered one.

We found one in the fibox setup. As we don't use it during the vent, we use this cable for the microphone.
Once we get the new one, it will go to the fibox setup.

 

  12582   Thu Oct 27 09:38:32 2016 SteveUpdatePEMmouse

We may have a mouse in the lab.  Do not leave any food scrap in trash ! Traps will be set.

 

Attachment 1: mouse.jpg
mouse.jpg
  12605   Tue Nov 8 08:51:59 2016 SteveUpdatePEMmouse hole sealed

This is where the mammal came though. It is reach able from room 108 CES

Quote:

We may have a mouse in the lab.  Do not leave any food scrap in trash ! Traps will be set.

 

 

Attachment 1: CES108rs.jpg
CES108rs.jpg
  12629   Mon Nov 21 11:30:01 2016 SteveUpdatePEMrat is cut and removed

Last jump at rack Y2.

Attachment 1: rat#2.png
rat#2.png
  12656   Fri Dec 2 10:57:08 2016 steveUpdatePEM door seal replaced

The south end door leaky weather seals replaced.

The aim is here to get some overpressure inside / outside so the lab partical count would not depend on outside condition.

 

Attachment 1: 1_year_PEM.png
1_year_PEM.png
  12673   Thu Dec 8 07:56:05 2016 SteveUpdatePEMEQ6.5m Northen CA

No damage. ITMY is glitching, so it has not been damped.

 

Attachment 1: eq6.5FerndaleCA.png
eq6.5FerndaleCA.png
Attachment 2: 16d_glitching-_trend.png
16d_glitching-_trend.png
Attachment 3: EQ6.5_&4.7mFerndaleCa.png
EQ6.5_&4.7mFerndaleCa.png
  12687   Thu Dec 29 10:24:56 2016 SteveUpdatePEMEQ5.7mHawthorn NV

Sus damping restored.

 

Attachment 1: eq5.7HawthorneNV.png
eq5.7HawthorneNV.png
  12696   Mon Jan 9 09:18:47 2017 SteveUpdatePEMpower glitch

There was a power glitch last night around 1:15am

The vacuum was not effected.

PSL laser turned on, PMC locked, PSL shutter opened and MC locked.

IR lasers at the ends turned on.

East arm air cond turned on.

The computers are all done.

The last power glitch was at Nov 3, 2016

 

 

Attachment 1: MondayMorning.png
MondayMorning.png
  12711   Fri Jan 13 10:53:03 2017 SteveUpdatePEMdoors are fixed

Control room to outside door was realigned.

                                                   It is self closing now.

Control room to IFO door lock optimized to soft closing.

All other doors lubricated by Alex of the key shop.

  12712   Fri Jan 13 14:18:28 2017 SteveUpdatePEMair condition fixed

The old control room AC  has been stick in heating mode for about 2 months. It's thermostate and fan belt  was finally replaced. It was calibrated and set to 71 F ( just behind 1X6 on west wall ) around 1pm.

Out belt; sad inside 

at 4 pm Rana cried

It must be too tight.

Attachment 1: PEM_120d.png
PEM_120d.png
  12743   Fri Jan 20 14:42:12 2017 SteveUpdatePEMCaltech weather station

We should be able to connect to this station

  12744   Fri Jan 20 17:12:37 2017 SteveUpdatePEMEM172 mic is hooked up in the PSL

Gautam and Steve,

It is hanging in the midle of the PSL enclosure. Wired to 1X1 to get plus and minus 15V through fuse.    It's output is connected to FB c17 input.

GV: C17 corresponds to "MIC 1" in the PEM model. So the output is saved as "C1:PEM-MIC_1_OUT_DQ"

Quote:

I added an EM172 to my soldered circuit and it seems to be working so far. I have taken a spectra using the EM172 in ambient noise in the control room as well as in white noise from Audacity. My computer's speakers are not very good so the white noise results aren't great but this was mainly to confirm that the microphone is actually working.

white_v_ambient.pdf

 

Attachment 1: EM172c.jpg
EM172c.jpg
  12789   Thu Feb 2 17:34:25 2017 ranaUpdatePEMEM172 mic is hooked up in the PSL

I don't know if anyone looked at the time series (not trend) or spectrum of the Microphone after installation, but it looks bad and featureless to me. Is the Microphone broken?

This shows the spectrum from early this morning and again from tonight. You can see that it is bi-stable in its noise properties. This thing is busted; we're now removing it from the PSL so that it doesn' light it self on fire.

http://i.dailymail.co.uk/i/pix/2017/01/23/22/3C6BB70900000578-0-image-a-1_1485211840229.jpg

Attachment 1: MicFail.pdf
MicFail.pdf
  12790   Thu Feb 2 17:43:20 2017 gautamUpdatePEMEM172 mic is hooked up in the PSL

I had noticed something wonky with the microphone, but neglected to elog it. I had tested it after installation by playing a sine wave from my laptop and looking at the signal on the PSL table, it worked fine. But you can see in the attached minute trend plot that the signal characteristics changed abruptly ~half a day after installation, and never quite recovered.\

 

Attachment 1: Mic_broken.png
Mic_broken.png
  12836   Fri Feb 17 10:56:12 2017 steveUpdatePEMparticle counter moved into PSL enclousure

The MET#1 particle counter was moved from CES wall at ITMX to PSL enclousure south west corner at 11am.

The HEPA filter speed at the Variac was turned down to 20V from 40

This counter pumps air for 1 minute in every 20 minutes. Soft foam in bags used to minimize this shaking as it is clamped.

 

Attachment 1: from_here.jpg
from_here.jpg
Attachment 2: to_here.jpg
to_here.jpg
Attachment 3: PSL_particles.png
PSL_particles.png
  12841   Tue Feb 21 10:08:35 2017 steveUpdatePEMnoisy morning

Our new janitor Francisco is started working in IFO room today.

Quote:

The MET#1 particle counter was moved from CES wall at ITMX to PSL enclousure south west corner at 11am.

The HEPA filter speed at the Variac was turned down to 20V from 40

This counter pumps air for 1 minute in every 20 minutes. Soft foam in bags used to minimize this shaking as it is clamped.

 

Large film crews are working just out side  the north west corner of the lab. They started around ~ 5:30am  Do not plan on working late tonight.

ETMX sus damping restored.

C1:PSL-FSS_RMTEMP, C1:PSL-PMC_PMCTRANSPD and C1:PEM-count_temp channels are not reading since Friday

 

Attachment 1: outside_activity.png
outside_activity.png
  12844   Wed Feb 22 08:54:17 2017 steveUpdatePEM PSL enclousure particle count

ETMX sus damping recovered.  PSL enclousure is dusty at 20V rotation speed. Rainy days as outside condition.

Quote:

The MET#1 particle counter was moved from CES wall at ITMX to PSL enclousure south west corner at 11am.

The HEPA filter speed at the Variac was turned down to 20V from 40

This counter pumps air for 1 minute in every 20 minutes. Soft foam in bags used to minimize this shaking as it is clamped.

 

 

Attachment 1: dusty__PSL.png
dusty__PSL.png
  12855   Tue Feb 28 08:04:48 2017 steveUpdatePEMETMX damping recovered

ETMX sus damping recovered.

Note: The giant metal garbage container was moved from the south west corner of CES months ago.

Quote:

ETMX sus damping recovered.  PSL enclousure is dusty at 20V rotation speed. Rainy days as outside condition.

 

 

Attachment 1: ETMX.png
ETMX.png
ELOG V3.1.3-