| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2782
|
Thu Jun 9 10:27:01 2022 |
Radhika | DailyProgress | 2um Photodiodes | PD testing plan in CAML lab | [Aidan, Radhika]
On Tuesday 6/7 we met to discuss
next steps for getting PD testing up and |
|
|
2781
|
Wed Jun 8 12:15:06 2022 |
Radhika | DailyProgress | Emissivity estimation | Megastat cooldown - repainted inner shield aquadag, added aquadag foil to cold plate | The cryocooler was turned off 6/8 at 11am. |
|
|
2780
|
Tue Jun 7 11:50:09 2022 |
Radhika | DailyProgress | Emissivity estimation | Fastest cooldown + power budgets for 2" Si wafer cooldown in Megastat | I've modeled the theoretical "best"
achievable configuration in Megastat, replacing
the flexible strap with a solid copper element, |
|
|
2779
|
Mon Jun 6 14:05:08 2022 |
Aidan | Electronics | Purchases | Return me to WB265B: Location of Thorlabs S130C (silicon photodiode 5mW/500mW settings) | [Aidan]
I bought a new photodiode for the
West Bridge Labs. It will be housed in the |
|
|
2778
|
Mon Jun 6 09:45:58 2022 |
Radhika | DailyProgress | Emissivity estimation | Megastat cooldown - repainted inner shield aquadag, added aquadag foil to cold plate | [Stephen, Radhika, Hiya]
This entry describes efforts towards
the most recent Megastat cooldown with: |
6x |
|
2777
|
Thu Jun 2 10:28:26 2022 |
Yehonathan | Update | WOPO | Installing 1811 PDs | [Shruti, Yehonathan]
We took newport 1811
PDs, one from CTN lab (suspicious) and one |
|
|
2776
|
Tue May 31 17:53:07 2022 |
rana | DailyProgress | Emissivity estimation | Si wafer emissivity testing | that's a good start, but we want the
cooldown to be fast, so what we would need
from the model is for you to change some |
|
|
2775
|
Fri May 27 17:33:24 2022 |
Radhika | Summary | Emissivity estimation | List of Megastat upgrades for emissivity estimation | [Stephen, Radhika]
Today we further discussed ideas
for the enclosure, suspension/support, and |
|
|
2774
|
Fri May 27 13:30:21 2022 |
Radhika | DailyProgress | Emissivity estimation | Si wafer emissivity testing | I modeled the cooldown of a 2" Si
wafer in Megastat with cooling from a) the
existing cryocooler and b) LN2. The |
|
|
2773
|
Thu May 26 13:12:25 2022 |
Radhika | Summary | Emissivity estimation | List of Megastat upgrades for emissivity estimation | I think this flashlight
would work
|
|
|
2772
|
Wed May 25 14:32:12 2022 |
Radhika | Summary | Emissivity estimation | List of Megastat upgrades for emissivity estimation | This post will serve as a running list
of modifications for Megastat for emissivity
estimation (brain dump). It is divided into |
|
|
2771
|
Fri May 20 11:08:16 2022 |
Radhika | DailyProgress | Emissivity estimation | Megastat Inner Shield for emissivity estimation | The results from tapping are in the previous
entry, and it seemed to work well. As for
the emissivity of the inner surface, it would |
|
|
2770
|
Wed May 18 21:53:31 2022 |
rana | DailyProgress | Emissivity estimation | Megastat Inner Shield for emissivity estimation | I'd recommend drilling a through hole
and using a nut, rather than tapping as I
suggested earlier. The shield is not thick |
|
|
2769
|
Wed May 18 09:42:34 2022 |
Radhika | DailyProgress | Emissivity estimation | Megastat Inner Shield for emissivity estimation | [Radhika, JC]
In order to avoid having to order
a new inner shield for emissivity estimation |
9x |
|
2768
|
Fri May 13 09:12:14 2022 |
Radhika | DailyProgress | Emissivity estimation | Plan towards MCMC emissivity estimation | I've now used the following model of
heat transfer between a suspended Si sample
(1), inner shield (2), and aperture |
|
|
2767
|
Wed May 11 15:53:06 2022 |
Aidan | Lab Infrastructure | Cleanliness | Ceiling tile replacement - Day 2 | Tiles are replaced.
|
|
|
2766
|
Tue May 10 14:27:26 2022 |
Aidan | Lab Infrastructure | Cleanliness | Ceiling tile replacement - Day 1 | Henry from the Carpentry Shop has started
replacing ceiling tiles. They need to be
cut to fit each location. There was a lot |
|
|
Draft
|
Mon May 9 09:45:17 2022 |
Stephen | DailyProgress | 2um Photodiodes | Recovery of IR Labs dewar WIP | [Jordan, Jancarlo, Stephen, Radhika]
The Helium leak testing setup from
the 40m Bake Lab was transported to WB B265B |
|
|
2764
|
Thu Apr 28 14:12:20 2022 |
Yehonathan | Update | WOPO | Still figuring out the readout electronics and fixing of some stuff | {Shruti, Yehonathan}
We went to the e-shop to investigate
the PD circuits. Completely confused about |
|
|
2763
|
Thu Apr 28 11:39:24 2022 |
JC | Electronics | General | Network | I checked the internet in the TCS/MD Lab
and it is running great and the switch is
runing properly. |
|
|
2762
|
Mon Apr 25 11:08:35 2022 |
Yehonathan | Update | WOPO | Still figuring out the readout electronics and fixing of some stuff | {Shruti, Yehonathan}
We realized that the PD amp circuit
only requires a 5V DC supply so we try that. |
|
|
2761
|
Fri Apr 22 13:58:09 2022 |
Radhika | DailyProgress | Emissivity estimation | Plan towards MCMC emissivity estimation | I've used the following model of heat
transfer between a suspended Si sample (1)
and the inner shield (2) in Megastat: |
|
|
2760
|
Thu Apr 21 10:33:33 2022 |
shruti | Update | WOPO | Still figuring out the readout electronics and fixing of some stuff | [Yehonathan, Shruti]
First we turned on the relevant |
|
|
2759
|
Wed Apr 20 00:12:12 2022 |
Yehonathan | Update | WOPO | Still figuring out the readout electronics and fixing of some stuff | {Yehonathan, Shruti}
1. Grabbed 30Hz-3GHz HP spectrum
analyzer from the Cryolab. Installed it in |
|
|
2758
|
Wed Apr 20 00:00:39 2022 |
Yehonathan | Lab Infrastructure | General | Preparing for planned power outage | {Yehonathan, Shruti}
We shut down the workstations and
the FBs by doing |
|
|
2757
|
Mon Apr 18 12:02:36 2022 |
Radhika | DailyProgress | Emissivity estimation | Plan towards MCMC emissivity estimation | Below are the outlined steps towards building
an MCMC model for estimating the emissivity
of a surface inside Megastat, and determining |
|
|
2756
|
Fri Apr 15 13:30:41 2022 |
Radhika | DailyProgress | CDS | CTC100 for Megastat not responding to Telnet | [Radhika, Chris, Ian, Paco]
There are two CTC100s in QIL, so
we will use the following nicknames: |
|
|
2755
|
Fri Apr 15 11:44:41 2022 |
Radhika | DailyProgress | Cryo vacuum chamber | Cooldown started, two copper bars; manual logging. | Since the heater seems to not be functional
once again (displaying N/A and no power output),
I proceeded to turn off the cryocooler so |
|
|
2754
|
Mon Apr 11 14:50:45 2022 |
rana | DailyProgress | Cryo vacuum chamber | Si wafer emissivity testing | that's good. Can you from these models
estimate what the uncertainty will be on
the emissivity? i.e. by MCMC or otherwise |
|
|
2753
|
Fri Apr 8 17:34:10 2022 |
Stephen | DailyProgress | Cryo vacuum chamber | Cooldown started, two copper bars; manual logging. | Restart, without vacuum incursion, of cooldown
from QIL/2749.
Hopefully we pull data this time, via manual |
|
|
2752
|
Fri Apr 8 16:25:54 2022 |
Stephen | DailyProgress | 2um Photodiodes | Recovery of IR Labs dewar WIP | Quick log describing effort to recover
leaky IR Labs dewar.
POC Steve Zoltowski - Stevez@irlabs.com |
|
|
2751
|
Fri Apr 8 14:28:05 2022 |
Radhika | DailyProgress | Emissivity estimation | Si wafer emissivity testing | I've modeled the cooldown of a 2"
diameter and 4" diameter Si wafer in
Attachments 1 and 2, using the current Megastat |
|
|
2750
|
Wed Apr 6 10:31:55 2022 |
rana | DailyProgress | | Rerun of cooldown with indium gaskets in copper bar joints | I think this is a nice debugging find.
Its not very robust to use the workstations
as 24/7 script machines (as we have found |
|
|
2749
|
Tue Apr 5 16:47:46 2022 |
Radhika | DailyProgress | | Rerun of cooldown with indium gaskets in copper bar joints | [Radhika, Stephen]
On Thursday 3/31 we opened up with
a goal to diagnose and fix the heater |
9x |
|
2748
|
Tue Apr 5 16:41:17 2022 |
Radhika | Things to Buy | Purchases | New optical table legs for north table | The 13.5" rigid
legs would cost $1,891. |
|
|
2747
|
Tue Apr 5 12:20:09 2022 |
rana | Things to Buy | Purchases | New optical table legs for north table | we don't really need Pneumatic legs.
How much for rigid legs?
|
|
|
2746
|
Tue Apr 5 11:15:13 2022 |
Radhika | Things to Buy | Purchases | New optical table legs for north table | The current QIL optical tables are Thor
Labs PTH503 (discontinued, replaced by PTH603 |
|
|
2745
|
Mon Apr 4 17:05:20 2022 |
Radhika | Safety | Cleanliness | Lab flooding | Pictures attached. WS1 and WS2 have been
turned back on, since the replacement for
the ceiling panels will not arrive for another |
|
|
2744
|
Fri Apr 1 13:53:02 2022 |
Radhika | Safety | Cleanliness | Lab flooding | Facilities will be returning on Monday
4/4 between 8-9 AM to remove all ceiling
panels above the workstations in B265B (QIL). |
|
|
2743
|
Wed Mar 30 16:25:06 2022 |
Koji | Safety | Cleanliness | Lab flooding | Muddy Waters is not new, but if the facility
can fix it we'd take it.
|
|
|
2742
|
Wed Mar 30 10:46:49 2022 |
Radhika | Safety | Cleanliness | Lab flooding | [Radhika, Shruti]
This morning, facilities removed
all the porous ceiling panels that had been |
|
|
2741
|
Tue Mar 29 09:13:20 2022 |
Aidan | Safety | Cleanliness | Lab flooding | Facilities placed a blower and dehumidifier
in B265B. I checked the airflow and the air
around the tables is comparitively still. |
|
|
2740
|
Mon Mar 28 18:00:43 2022 |
Koji | Safety | Cleanliness | Lab flooding | Flood photo album: https://photos.app.goo.gl/BZAG8DyQzFVTfMNz6
(This link is read-only who has no access
to the account) |
|
|
2739
|
Mon Mar 28 16:09:57 2022 |
Aidan | Safety | Cleanliness | Lab flooding | Some photos of affected areas in B265A
and B265B (elog shows some preview photos
- click on PDF for full set). |
|
|
2738
|
Mon Mar 28 14:29:22 2022 |
shruti | Safety | Cleanliness | Lab flooding | When I went into QIL today there was a
lot of flooding from water dripping from
the ceiling at several places in the lab. |
|
|
2737
|
Sat Mar 26 12:49:18 2022 |
Stephen | DailyProgress | Cryo vacuum chamber | Warmup started, issue with steady state heating | 25 March 2022 (Friday) at 21:00, went to
QIL to start warmup.
- Cryocooler was turned off |
|
|
2736
|
Thu Mar 24 16:08:35 2022 |
Radhika | DailyProgress | Cryo vacuum chamber | Megastat cooldown 3/18 - adding indium gaskets to copper bar joints | The data from this cooldown is attached
(labeled 03/19 - UTC time), compared
to the run started on 03/10. In between these |
|
|
2735
|
Tue Mar 22 09:19:38 2022 |
shruti | Update | WOPO | Waking up WOPO - back to green path | [Yehonathan, Shruti]
Yesterday we went back to fiddling
with the green path. Soon after opening the |
|
|
2734
|
Fri Mar 18 19:34:35 2022 |
Radhika | DailyProgress | Cryo vacuum chamber | Megastat cooldown 3/18 - adding indium gaskets to copper bar joints | Today I opened up Megstat to add indium
in between the copper bar joints, with the
hopes of speeding up cooldown and informing |
8x |
|
2733
|
Wed Mar 16 12:22:44 2022 |
Yehonathan | Update | WOPO | Waking up WOPO - attempts at readout | {Shruti, Yehonathan}
Yesterday, we measured a bunch
of noises. |
|