| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2526
|
Tue Dec 22 15:20:14 2020 |
Koji | Summary | General | Instrument loan | Is the reverse bias programmable? FEMTO
has a bias trimmer on it. It's useful
in the usual application, but for automation, |
|
|
2525
|
Tue Dec 22 10:42:17 2020 |
rana | Summary | General | Instrument loan | I was thinking about getting this new current
pre-amp from NF:
http://www.nfcorp.co.jp/english/pro/mi/loc/pre/ca5351/index.html |
|
|
2524
|
Wed Dec 16 22:08:36 2020 |
anchal | Update | Equipment transfer | Took delay line box, compressed nitrogen cylinder and lens to 2um (Crackle) lab |
Took a delay line box DB64 from
QIL from the WOPO table to the 2um (formerly
known as Crackle) lab. The box was marked |
|
|
2523
|
Tue Dec 8 11:27:51 2020 |
Radhika | Misc | Lab Monitoring | Particle counter communication | I have a python script for communication
with the Met One 227a particle counter, but
it appears like I am not receiving a response |
|
|
2522
|
Fri Nov 20 18:49:43 2020 |
Koji | Summary | General | Instrument loan | FEMTO DLPCA200 low noise preamp (brand
new)
Keithley Source Meter 2450 (brand |
|
|
2521
|
Fri Nov 20 18:47:42 2020 |
Koji | Summary | General | Permenant exchange of TED200C(QIL) and TED200C(2umECDL) | I moved the brand new TED200C on the workbench
to Crackle for 2um ECDL (permanently)
The TED200C temp controller used in |
|
|
2520
|
Thu Nov 19 16:25:30 2020 |
Aidan | Update | 2um Photodiodes | Agilis piezo mirror installed in JPL PD testing apparatus | Here's the python code I used to control
this.
I incorrectly used the Move to |
|
|
2519
|
Tue Nov 17 17:51:44 2020 |
Aidan | Update | 2um Photodiodes | Agilis piezo mirror installed in JPL PD testing apparatus | I installed the Agilis mirror before the
lens and cryo-chamber. Used the USB interface
to align the beam onto the PD. So we can |
|
|
2518
|
Wed Nov 11 16:09:22 2020 |
anchal | Summary | ECDL | AUX wavelength finesee requirements in mariner - Added Excess Scatter Noise | An issue was raised with last calculation
about the fact that our sensing of PDH signal
isn't ideal and in the real world there |
|
|
2517
|
Tue Nov 10 12:46:34 2020 |
Aidan | Update | 2um Photodiodes | JPL PD resurrection (cont.) | Looks like the temperature difference between
the PD and the shield is relatively small.
Even the transients when the heater is applied |
|
|
2516
|
Mon Nov 9 15:49:58 2020 |
Aidan | Update | 2um Photodiodes | JPL PD resurrection (cont.) | Okay - all the steps in the procedure of eLOG
2476 have been verified as working |
|
|
2515
|
Mon Nov 9 10:08:38 2020 |
anchal | Summary | ECDL | AUX wavelength finesee requirements in mariner with 1418 nm ECDL (Preliminary) | I have a preliminary calculation to post
here. This does not include noise sources
from cavity fluctuations and main frequency |
|
|
2514
|
Fri Nov 6 12:45:21 2020 |
Aidan | Update | 2um Photodiodes | Photodiode testing recovery status | Embellished Chris's PD MEDM screen
a bit to illustrate controls in a diagram.
The representation of the RELAY SWITCH between |
|
|
2513
|
Fri Nov 6 08:14:58 2020 |
Aidan | Update | 2um Photodiodes | Photodiode testing recovery status | Quick update, more detailed update to follow.
Laser is working
Photodiode
sweep with the Keithley shows a sensible |
|
|
2512
|
Thu Nov 5 11:20:45 2020 |
anchal | Summary | ECDL | True PDH Error signal TF and including FSR effects in approximated models | If we use ECDL for auxiliary frequency
in 40m and hope to stabilize it up to 1 MHz
with digital compensation of PZT, it is important |
|
|
2511
|
Wed Oct 28 14:05:19 2020 |
rana | Summary | ECDL | Effects of chosen AUX finesse and source on Calibration requirements |
Quote:
|
|
|
2510
|
Fri Oct 23 12:19:19 2020 |
anchal | Summary | ECDL | Effects of chosen AUX finesse and source on Calibration requirements | Following up on the last post, here I presented
a near back of the envelope calculation of
how different choices of AUX cavity finesse |
|
|
2509
|
Thu Oct 22 11:19:44 2020 |
anchal | Summary | ECDL | Prospects of using ECDL for Auxiliary laser | We can use Thorlabs
SAF1450S2 gain chip to generate 1418
nm light using an ECDL design similar to |
|
|
2508
|
Fri Sep 25 14:45:04 2020 |
Stephen | DailyProgress | Cryo vacuum chamber | Vibration Measurement Equipment and Shield Construction | Came into lab today, with two main goals:
1) Bring Downs equipment for vibration
measurements of cryo cooler during next operation |
|
|
2507
|
Wed Sep 23 00:26:59 2020 |
aaron | Misc | General | lab entry | I entered QIL just before Wed Sep 23 00:27:51
2020 to check out and photograph the sprinklers,
spent about 20 min looking around the lab |
|
|
2506
|
Tue Sep 15 15:16:18 2020 |
Anchal | Misc | Cleanliness | HEPA Filters turned to maximum | HEPA filters on top of the WOPO table have
been turned to High (earlier were at Low). |
|
|
2505
|
Wed Sep 2 08:13:18 2020 |
Stephen | DailyProgress | Cryo vacuum chamber | Assembly of QIL Setup and other updates from 2020 Sep 01 | 2020 Sep 01, StephenA with remote assistance
from RaymondR
Highlights |
|
|
2504
|
Fri Aug 14 11:17:04 2020 |
Raymond | Update | Cryo vacuum chamber | Cooler now operational | Cryopump is up and running. Initial attempts
to run the cooler were stymied by an open
circuit in the cold head to compressor connection |
|
|
2503
|
Fri Aug 7 11:50:06 2020 |
Raymond | Update | Cryo vacuum chamber | Tank pumpdown | The diaphragm pump was turned on earlier
this week after finally closing up this external
adapter tank. Out of an overabundance of |
|
|
2502
|
Tue Aug 4 17:08:00 2020 |
Raymond | Update | Cryo vacuum chamber | 19 pin MIL feedthrough and CTC100 wiring | Used the 19-pin MIL feedthrough to
run 4 platinum RTD's and a 25 Ω
100 W resistive heater to the cold head. |
|
|
2501
|
Fri Jul 24 07:50:00 2020 |
Raymond | Update | Cryo vacuum chamber | Prototype shield panels | Picked up the prototype shield panels from
Hamilton Metalcraft 7/22 and brought them
to QIL. All of the parts are wrapped by part |
|
|
2500
|
Fri Jul 24 05:22:30 2020 |
Raymond | Lab Infrastructure | PD QE | Round 2 of JPL PD's in lab | Alex dropped off the new round of 2um PD's,
they're on the north table accompanied
by his data sheet. |
|
|
2499
|
Fri Jul 24 04:54:57 2020 |
Raymond | Lab Infrastructure | General | MDF repair | First day back (7/15) found the particle
board trim w/ powerstrip on the QIL
workbench had collapsed. Re-glued and added |
|
|
2498
|
Fri Jul 24 04:46:51 2020 |
Stephen | Lab Infrastructure | Cryo vacuum chamber | | Copper parts picked up July 23rd and brought
to QIL, now only waiting on PO# S477874
and the pirani gauge from Koji's bulk JPL |
|
|
2497
|
Fri Jul 17 15:54:42 2020 |
Stephen | Lab Infrastructure | Cryo vacuum chamber | |
Torque driver set for QIL setup
bolted joints, with range 15 in*oz - 50 in*lb, |
|
|
2496
|
Tue May 12 10:15:30 2020 |
aaron | Update | PSOMA | preliminary PSOMA layout | I've updated the PSOMA optical layout.
I still have some questions on locking, and
there are a few additional configurations |
|
|
2495
|
Fri May 1 13:27:07 2020 |
Raymond | Update | PD noise | Sb3513 A2P6 2020-02-04 Dark Noise/QE data | Attachment 1 contains the SR785 dark noise
measurements at number of PD reverse bias
voltages from 77-295K with filenaming convention: |
|
|
2494
|
Thu Apr 16 18:03:22 2020 |
aaron | Update | PSOMA | preliminary PSOMA layout | I put together two PSOMA layouts, one for
a bowtie cavity and one for a ring cavity
configuration. |
|
|
2493
|
Mon Apr 6 19:01:21 2020 |
Koji | Update | General | West Bridge flooding Apr 6th | Additional notes:
I did not see anyone in the building.
Attachment 1/2: Our labs have no |
|
|
2492
|
Mon Apr 6 18:38:50 2020 |
Koji | Update | General | West Bridge flooding Apr 6th | To check the status of all the labs, I
went to WB. There was no ongoing water leakage
in the labs. |
15x |
|
2491
|
Mon Apr 6 18:35:48 2020 |
Koji | Summary | General | West Bridge flooding Apr 6th | West Bridge flooding Apr 6th due to rain
in the night
Looks like the first responder |
|
|
2490
|
Mon Mar 9 13:13:02 2020 |
Koji | Lab Infrastructure | HVAC | HVAC work concluded for today | Last Friday, I found the HEPA units on
the squeezer table were not on. I turned
them on at "SLOW". |
|
|
2489
|
Fri Feb 28 13:36:32 2020 |
Ian MacMillan | Summary | Lab Monitoring | Item lending: Particle Counter from OMC Lab to QIL | Still trying to figure out how to set up
the particle counter remotely. The current
particle count is 576. |
|
|
2488
|
Thu Feb 27 14:26:52 2020 |
Koji | Summary | Lab Monitoring | Item lending: Particle Counter from OMC Lab to QIL | Item lending as per Ian's request:
Particle Counter from OMC Lab to QIL
The current particle class of |
|
|
2487
|
Tue Feb 25 15:12:22 2020 |
Raymond, Chris, Koji, Chub, Aidan | Lab Infrastructure | HVAC | HVAC work concluded for today | Facilities workers replumbed the water
lines feeding the air handler units in the
QIL. Tomorrow they plan to come back for |
|
|
2486
|
Mon Feb 24 18:41:06 2020 |
Raymond | Lab Infrastructure | HVAC | Table Shielding for 2020-02-25 HVAC repairs | [Raymond, Chris, Koji, Chub, Aidan, Duo]
Both tables were surrounded with
plastic shielding in preparation for the |
|
|
2485
|
Thu Feb 13 11:04:47 2020 |
Ian MacMillan | Lab Infrastructure | HVAC | Recent temperature fluctuations | Here is the data for the last week. The
temperature for the Northside is noticeably
higher than the Southside. This is probably |
|
|
2484
|
Tue Feb 4 14:18:24 2020 |
Ian MacMillan | Lab Infrastructure | HVAC | Recent temperature fluctuations | Got data from the HOBO temperature recorders.
The temperature has been fluctuating between
about 80 degrees F to 60 degrees F. The Temperature |
|
|
2483
|
Fri Dec 20 22:26:19 2019 |
Koji | Update | PD QE | PD TEC driver / A2P6 aligned / Lens moved | The QEs were measured at 293K, 239K, 232K,
and 293K again. The cooling was provided
by the PD TEC. At each temperature, |
6x |
|
2482
|
Fri Dec 20 21:58:14 2019 |
Koji | Update | PD QE | PD TEC driver / A2P6 aligned / Lens moved | ==
Currently, A2P6 is aligned ==
1) I've brought another TEC driver |
|
|
2481
|
Fri Dec 20 13:20:53 2019 |
Aidan | Summary | PD QE | QE results from A2P6 (500um) and A2P2 (1mm) | The QE measurements from the first couple
of photodiodes are attached below.
plot_JPL_diode_results.m |
6x |
|
2480
|
Mon Dec 16 18:16:31 2019 |
Raymond | DailyProgress | PD QE | Cryostat wiring fixes | Opened the cryostat to resolder the
heater and re-wrap the thermal anchor for
the sample RTD and PD connection. All connections |
|
|
2479
|
Fri Dec 13 01:51:15 2019 |
Raymond | DailyProgress | PD QE | Cryostat wiring fixes |
Monitored an autorun of the photocurrent
for A2P6 from about 77K-300K and adjusted
the laser alignment as necessary. I've |
|
|
2478
|
Thu Dec 12 02:10:37 2019 |
Raymond, Chris | DailyProgress | PD QE | PD test dry run | (Raymond, Chris)
Baseplate and shield RTD
temperature sensors are working, and digitally |
|
|
2477
|
Wed Dec 11 19:50:25 2019 |
rana | Howto | Cryo vacuum chamber | Procedure to record photodiode output vs temperature | don't we also want to record the dark
noise spectrum as a function of T and V_Bias
? I would guess that the dark noise doesn't |
|