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ID Date Author Type Category Subject Text Attachments
  2610   Wed Aug 18 11:12:47 2021 aaronMiscElectronics EquipmentSR560 to cryoI borrowed one two unused SR560
from CTN to Cryo. The first one had periodic
noise at 100 Hz (operated in low noise AC
  2609   Tue Feb 23 11:05:28 2021 anchalNotesEquipment loanTook home moku and wenzel crystal for characterizationReturned all remaining stuff to CTN:

Wenzel 5001-13905
24.483 MHz Crystal Oscillator
  2608   Thu Feb 11 18:01:39 2021 AnchalDailyProgressInstrumentCharacterizationSR560 Intermodulation TestI added script SRIMD.py
in 40m/labutils/netgpibdata which allows
one to measure second order intermodulation
  2607   Wed Jan 27 15:12:05 2021 AnchalNotesEnvironmentSmall leak or drip in the lab on West EndI noticed small amount of water on the
floor (Attachment 1) on the west end of the
lab. Immediately above it is a pipe which
  2606   Wed Jan 27 15:11:13 2021 anchalNotesEquipment loanHP E3630A returnedI have brought back HP E3630A
triple output DC power supply.

  2605   Tue Dec 15 12:59:14 2020 anchalNotesEquipment loanMoved Marconi and Rb Clock to Crackle labMoved the rack-mounted Marconi 2023A (#539)
and SRS FS725 Rb Clock to crackle lab (See
  2604   Wed Dec 9 18:13:12 2020 PacoMiscEquipment loannew focus 1811Borrowed two broadband PDs (new focus 1811)
and one power supply unit (new focus 0901)
from CTN into Crackle.
  2603   Mon Dec 7 19:02:26 2020 PacoNotesEquipment loanUPDH box Borrowed Universal PDH box from CTN lab
(D0901351) and a mounted Faraday isolator
(Thorlabs) for use in Crackle.
  2602   Wed Dec 2 13:43:43 2020 anchalSummaryEquipment loanTransferred two gold box RFPDs to 40mI transferred two Gold Box RFPDs labeled
SN002 and SN004 (both resonant at 14.75 MHz)
to 40m. I handed them to Gautam on Oct 22,
  2601   Tue Dec 1 12:04:10 2020 RadhikaNotesEquipment loanBrought home low-noise preamplifierI have brought home the following items
(provided by Anchal):

1. Low-noise Preamplifier (Model
  2600   Mon Nov 30 21:31:56 2020 KojiNotesLaserNorth laser not switching on, power supply display not workingI can't answer the last question, but
I just tell you my experience on the AC power
supply. The OMC Lab used to have a LWE NPRO
  2599   Mon Nov 30 10:28:08 2020 AnchalNotesLaserNorth laser not switching on, power supply display not workingI shorted the interlock terminals on the
North laser power supply and still as soon
as I turn the key to 'ON' position,
  2598   Thu Nov 26 11:26:14 2020 aguptaSummaryTempCtrlCavity temperature estimateMeasurement and estimation method:

Thermal continuous tuning coefficient is
  2597   Tue Nov 24 16:23:26 2020 PacoMiscEquipment loanbroadband EOMBorrowed 1 (new focus) broadband EOM from
CTN for temporary use in Crackle
(2 um OPO experiment)
  2596   Tue Nov 24 16:16:53 2020 anchalNotesEquipment loanTransferred moku to Cryo labI transferred the following form my home
to Cryo lab (Cryo_Lab/2587)
  2595   Mon Nov 23 14:56:59 2020 KojiNotesLaserNorth laser not switching on, power supply display not workingI suspected the interlock failure. Can
you replace the interlocking wire with a
piece of wire for the troubleshooting?
  2594   Mon Nov 23 10:58:46 2020 anchalNotesLaserNorth laser not switching on, power supply display not workingThe north laser power supply display is
not working and when the key is turned to
ON (1) position, the status yellow light
  2593   Mon Nov 9 16:53:55 2020 RadhikaNotesComputersBrought home Dell laptopI have brought home the following item,
provided by Paco:

Black Dell Laptop
  2592   Sat Oct 10 08:43:30 2020 anchalSummaryElectronics EquipmentRed Pitaya and Moku characterizationI set up Red Pitaya, Wenzel Crystal, and
Moku at my apartment and took frequency noise
measurements of Red Pitaya and Wenzel Crystal
  2591   Wed Sep 30 11:13:28 2020 anchalNotesEquipment loanTook home moku and wenzel crystal for characterizationI have brought home the following items
from CTN Lab today:

Moku with
  2590   Wed Sep 23 00:21:02 2020 aaronMiscEquipment loanHP 8560E SA to CryoI entered CTN just before (Wed Sep 23 00:22:11
2020 ) to borrow a spectrum analyzer, which
I took to Cryo. Wore shoe covers, goggles.
  2589   Tue Sep 15 15:13:44 2020 AnchalNotesEnvironmentHEPA filters switched on. Measurement stopped.I have switched on HEPA filters to high,
both on top of the main table and on top
of the flow bench.
  2588   Fri Jun 26 12:38:34 2020 AnchalDailyProgressNoiseBudgetBayesian Analysis Finalized, Adding Slope of Bulk Loss Angle as variableI added the possibility of having a power-law
dependence of bulk loss angle on frequency.
This model of course matches better with
  2587   Wed Jun 24 21:14:58 2020 AnchalDailyProgressNoiseBudgetBetter measurement on June 24thFinal result of CTN experiment
as of June 24  9 pm:

  2586   Tue Jun 23 17:28:36 2020 AnchalDailyProgressNoiseBudgetBetter measurement on June 22nd (as I turned 26!)Final result of CTN experiment
as of June 23  5 pm:

  2585   Mon Jun 15 17:58:02 2020 anchalDailyProgressDocumentationCTN paperI've just finished a preliminary draft
of CTN paper. This is of course far from
final and most figures are placeholders.
  2584   Mon Jun 15 16:43:58 2020 AnchalDailyProgressNoiseBudgetBetter measurement on June 14thFinal result of CTN experiment
as of June 15th 5 pm:

  2583   Fri Jun 12 12:34:08 2020 anchalDailyProgressNoiseBudgetResolving discrepancy #1 concretlyI figured out why folks befor eme had to
use a different definition of effective coating
coefficent of thermal expansion (CTE) as
  2582   Thu Jun 11 14:02:26 2020 AnchalDailyProgressNoiseBudgetBayesian Analysis FinalizedI realized that in my noise budget I was
using higher incident power on the cavities
which was the case earlier. I have made the
  2581   Mon Jun 8 18:19:46 2020 anchalMiscOtherDAMOP Conference Brief SummaryI've made a brief summary of the talks
and topics I saw in DAMOP 2020 conference
which happened virtually last week. Here
  2580   Thu Jun 4 09:18:04 2020 AnchalDailyProgressNoiseBudgetBayesian Analysis FinalizedBetter measurement captured today.

Final result of CTN experiment
as of June 4th 9 am:

  2579   Mon Jun 1 11:09:09 2020 ranaDailyProgressNoiseBudgetBayesian Analysis Finalizedwhat is the effective phi_coating ? I think
usually people present bulk/shear + phi_coating.

  2578   Sun May 31 11:44:20 2020 AnchalDailyProgressNoiseBudgetBayesian Analysis FinalizedI've implemented all the proper analysis
norms that Jon suggested and are mentioned
in the previous
  2577   Thu May 28 14:13:53 2020 anchalDailyProgressNoiseBudgetBayesian AnalysisI'm listing first few comments from
Jon that I implemented:

Data cleaning can not be
  2576   Tue May 26 15:45:18 2020 anchalDailyProgressNoiseBudgetBayesian AnalysisToday we measured further low noise beatnote
frequency noise. I reran the two notebooks
and I'm attaching the results here:
  2575   Mon May 25 08:54:26 2020 anchalDailyProgressNoiseBudgetBayesian Analysis with Hard Ceiling ConditionI realized that using only the cleaned
out frequencies and a condition that estimated
power never goes above them at those places
  2574   Fri May 22 17:22:37 2020 anchalDailyProgressNoiseBudgetBayesian AnalysisI talked to Kevin and he suggested a simpler
straight forward Bayesian Analysis for the
result. Following is the gist:
  2573   Fri May 15 16:50:24 2020 anchalDailyProgressNoiseBudgetBayesian AnalysisIt's
typically much easier to overestimate than
underestimate the loss
  2572   Fri May 15 12:09:17 2020 aaronDailyProgressNoiseBudgetBayesian AnalysisWow, very suggestive ASD. A couple questions/thoughts/concerns:

It's typically much
easier to overestimate than
  2571   Wed May 13 18:07:32 2020 anchalDailyProgressNoiseBudgetBayesian AnalysisI did this analysis last with bare-bones
method in CTN:2439.
Now I've improved this much more. Following
  2570   Mon May 11 17:34:33 2020 anchalNotesDocumentationDAMOP Poster from CTN LabI will be presenting a poster on the latest
results from CTN Lab in the upcoming virtual
DAMOP 2020 conference. The following link
  2569   Mon May 4 17:18:24 2020 anchalNotesSeismicestimation of Seismic Noise coupling due to mirror birefringenceI did this analysis to calculate how much
of Seismic noise couples to the cavity resonance
frequency due to the birefringence of the
  2568   Thu Apr 16 18:08:56 2020 anchalDailyProgressNorth CavityNorth path stopped being buggyOn wednesday around noon, the North Path
got back to stability. I captured this process
by going back to the FB data. The process
  2567   Tue Apr 14 12:24:16 2020 anchalDailyProgressNorth CavityNorth path's buggy nature Strikes Again!Today at sharp 8:30 am, perfectly fine
running experiment went bad again. The North
path became buggy again with strong low frequency
  2566   Mon Apr 13 16:52:30 2020 anchalDailyProgressBEATBeatnote measurements back on trackSince this morning atleast, I'm not
seeing the North Path unstability (see CTN:2565)
  2565   Wed Mar 25 15:50:57 2020 anchalDailyProgressNorth CavityNorth path's buggy nature NOT solvedToday, magically almost, the North Path
was found to be locking nicely without the
noise. I was waiting for the beatnote to
  2564   Sun Mar 22 17:23:29 2020 anchalDailyProgressNorth CavityNorth path's buggy nature NOT solvedIt seems like this was never properly solved.
On Friday, the same problem was back again.
After trying relocking PMC and FSS on the
  2563   Thu Mar 19 15:34:41 2020 anchalDailyProgressNorth CavityNorth path's buggy nature solvedI found out that since the slow PID of
the FSS used Cavity reflection DC level,
it is important that this path remains rigid
  2562   Wed Mar 18 12:51:22 2020 anchalDailyProgressBEATSuper beatnote measurement analysis resultsOn March 13th around 7:30 pm, I started
a super measurement of the beatnote spectrum
for over 2 days. The script superBNSpec.py
  2561   Tue Mar 17 18:03:22 2020 anchalDailyProgressISSAdded true OOL transmission PD for North PathToday, I added a new out-of-loop transmission
PD (Thorlabs PDA10CS) for the north path.
This will be helpful in future measurements
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