| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2619
|
Thu Jul 13 20:38:33 2023 |
Koji | Summary | Laser | North (lower) NPRO controller is broken | Anchal mentioned that one of the lasers
is not functional. I checked what's the
situation. |
|
|
2618
|
Wed Dec 7 11:01:24 2022 |
aaron | Summary | Safety | airflow monitor installation | Rueben from Technical Safety Services installed
and calibrated an Apex 1000 airflow monitor
for the fume hood in CTN. Its power supply |
|
|
2617
|
Fri Aug 26 15:56:38 2022 |
Anchal | Summary | NoiseBudget | Checking with Martin Fejer's calculations | Martin Fejer recently gave two talks in
a coatings workshop where he showed calculations
regarding the thermal photoelastic channel. |
|
|
2616
|
Thu Aug 25 19:38:01 2022 |
Anchal | Summary | NoiseBudget | Birefringence noise in thermo-optic noise |
|
|
|
2615
|
Thu Aug 25 19:19:27 2022 |
Anchal | Summary | NoiseBudget | Looking at the measured and estimated photothermal transfer functions | The photothermal transfer function measurement
made back in 2014 showed some cancellation
of thermo-optic noise, but there were some |
|
|
2614
|
Tue Aug 23 22:04:24 2022 |
awade | Summary | NoiseBudget | Birefringence noise in thermo-optic noise | Interesting.
The obvious go to measurment here
would be two-lasers-one-cavity to measure |
|
|
2613
|
Tue Aug 23 19:56:21 2022 |
Anchal | Summary | NoiseBudget | Birefringence noise in thermo-optic noise | I made a few changes in my calculations
today, which changed the noise contribution
of this photoelastic noise (coatTPE) to roughly |
|
|
2612
|
Mon Aug 22 20:18:21 2022 |
Anchal | Summary | NoiseBudget | Birefringence noise in thermo-optic noise | I followed the analysis of this recently
published paper Jan
Meyer et al 2022 Class. Quantum Grav. 39 |
|
|
2611
|
Fri Jan 28 15:18:27 2022 |
Anchal | Summary | Equipment loan | CTN raided by 40m tribes | [Anchal, Paco]
CTN was raided today afternoon
between 2 pm and 3 pm by 40m tribes. They |
|
|
2610
|
Wed Aug 18 11:12:47 2021 |
aaron | Misc | Electronics Equipment | SR560 to cryo | I 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 |
anchal | Notes | Equipment loan | Took home moku and wenzel crystal for characterization | Returned all remaining stuff to CTN:
Wenzel 5001-13905
24.483 MHz Crystal Oscillator
One |
|
|
2608
|
Thu Feb 11 18:01:39 2021 |
Anchal | DailyProgress | InstrumentCharacterization | SR560 Intermodulation Test | I added script SRIMD.py
in 40m/labutils/netgpibdata which allows
one to measure second order intermodulation |
|
|
2607
|
Wed Jan 27 15:12:05 2021 |
Anchal | Notes | Environment | Small leak or drip in the lab on West End | I 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 |
anchal | Notes | Equipment loan | HP E3630A returned | I have brought back HP E3630A
triple output DC power supply.
|
|
|
2605
|
Tue Dec 15 12:59:14 2020 |
anchal | Notes | Equipment loan | Moved Marconi and Rb Clock to Crackle lab | Moved the rack-mounted Marconi 2023A (#539)
and SRS FS725 Rb Clock to crackle lab (See
SUS_Lab/1876). |
|
|
2604
|
Wed Dec 9 18:13:12 2020 |
Paco | Misc | Equipment loan | new focus 1811 | Borrowed 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 |
Paco | Notes | Equipment loan | UPDH 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 |
anchal | Summary | Equipment loan | Transferred two gold box RFPDs to 40m | I 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 |
Radhika | Notes | Equipment loan | Brought home low-noise preamplifier | I have brought home the following items
(provided by Anchal):
1. Low-noise Preamplifier (Model |
|
|
2600
|
Mon Nov 30 21:31:56 2020 |
Koji | Notes | Laser | North laser not switching on, power supply display not working | I 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 |
Anchal | Notes | Laser | North laser not switching on, power supply display not working | I 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 |
agupta | Summary | TempCtrl | Cavity temperature estimate | Measurement and estimation method:
125N-1064
Thermal continuous tuning coefficient is |
|
|
2597
|
Tue Nov 24 16:23:26 2020 |
Paco | Misc | Equipment loan | broadband EOM | Borrowed 1 (new focus) broadband EOM from
CTN for temporary use in Crackle
(2 um OPO experiment) |
|
|
2596
|
Tue Nov 24 16:16:53 2020 |
anchal | Notes | Equipment loan | Transferred moku to Cryo lab | I transferred the following form my home
to Cryo lab (Cryo_Lab/2587)
today: |
|
|
2595
|
Mon Nov 23 14:56:59 2020 |
Koji | Notes | Laser | North laser not switching on, power supply display not working | I 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 |
anchal | Notes | Laser | North laser not switching on, power supply display not working | The 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 |
Radhika | Notes | Computers | Brought home Dell laptop | I have brought home the following item,
provided by Paco:
Black Dell Laptop |
|
|
2592
|
Sat Oct 10 08:43:30 2020 |
anchal | Summary | Electronics Equipment | Red Pitaya and Moku characterization | I 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 |
anchal | Notes | Equipment loan | Took home moku and wenzel crystal for characterization | I have brought home the following items
from CTN Lab today:
Moku with |
|
|
2590
|
Wed Sep 23 00:21:02 2020 |
aaron | Misc | Equipment loan | HP 8560E SA to Cryo | I 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 |
Anchal | Notes | Environment | HEPA 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 |
Anchal | DailyProgress | NoiseBudget | Bayesian Analysis Finalized, Adding Slope of Bulk Loss Angle as variable | I 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 |
Anchal | DailyProgress | NoiseBudget | Better measurement on June 24th | Final result of CTN experiment
as of June 24 9 pm:
|
|
|
2586
|
Tue Jun 23 17:28:36 2020 |
Anchal | DailyProgress | NoiseBudget | Better 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 |
anchal | DailyProgress | Documentation | CTN paper | I'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 |
Anchal | DailyProgress | NoiseBudget | Better measurement on June 14th | Final result of CTN experiment
as of June 15th 5 pm:
|
|
|
2583
|
Fri Jun 12 12:34:08 2020 |
anchal | DailyProgress | NoiseBudget | Resolving discrepancy #1 concretly | I 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 |
Anchal | DailyProgress | NoiseBudget | Bayesian Analysis Finalized | I 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 |
anchal | Misc | Other | DAMOP Conference Brief Summary | I'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 |
Anchal | DailyProgress | NoiseBudget | Bayesian Analysis Finalized | Better measurement captured today.
Final result of CTN experiment
as of June 4th 9 am:
|
|
|
2579
|
Mon Jun 1 11:09:09 2020 |
rana | DailyProgress | NoiseBudget | Bayesian Analysis Finalized | what is the effective phi_coating ? I think
usually people present bulk/shear + phi_coating.
|
|
|
2578
|
Sun May 31 11:44:20 2020 |
Anchal | DailyProgress | NoiseBudget | Bayesian Analysis Finalized | I've implemented all the proper analysis
norms that Jon suggested and are mentioned
in the previous |
|
|
2577
|
Thu May 28 14:13:53 2020 |
anchal | DailyProgress | NoiseBudget | Bayesian Analysis | I'm listing first few comments from
Jon that I implemented:
Data cleaning can not be |
|
|
2576
|
Tue May 26 15:45:18 2020 |
anchal | DailyProgress | NoiseBudget | Bayesian Analysis | Today 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 |
anchal | DailyProgress | NoiseBudget | Bayesian Analysis with Hard Ceiling Condition | I 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 |
anchal | DailyProgress | NoiseBudget | Bayesian Analysis | I 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 |
anchal | DailyProgress | NoiseBudget | Bayesian Analysis | It's
typically much easier to overestimate than
underestimate the loss |
|
|
2572
|
Fri May 15 12:09:17 2020 |
aaron | DailyProgress | NoiseBudget | Bayesian Analysis | Wow, very suggestive ASD. A couple questions/thoughts/concerns:
It's typically much
easier to overestimate than |
|
|
2571
|
Wed May 13 18:07:32 2020 |
anchal | DailyProgress | NoiseBudget | Bayesian Analysis | I 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 |
anchal | Notes | Documentation | DAMOP Poster from CTN Lab | I will be presenting a poster on the latest
results from CTN Lab in the upcoming virtual
DAMOP 2020 conference. The following link |
|