| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
220
|
Tue Sep 5 16:43:19 2023 |
Aiden | Update | General | VAC System Heating Update | Checked on bake 5 today after 3 days of equilibrium.
The RGA cross is at 106 C and the turbo pump
cross is at 74 C. This was reached while |
|
|
222
|
Fri Sep 8 16:10:43 2023 |
Aiden | Update | VAC | VAC System Heating Update | Turned off the PID controllers to let the
chamber cool down. Final temperatures for
the RGA cross and Turbo pump cross were 113 |
|
|
223
|
Mon Sep 11 16:02:42 2023 |
Aiden | Update | VAC | VAC System Heating Update | The chamber has cooled down from bake 5 and
I took the first set of data. The pressure
measured during the RGA measurements reached |
|
|
224
|
Tue Sep 12 15:31:31 2023 |
Aiden | Update | Clean & Bake | Clean and Bake Batch 15 | Cleaned and Baked the SS screws for the heater
mount. Check the Clean and Bake data base
on the website to get a precise list of the |
|
|
226
|
Fri Sep 15 17:33:35 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | Took some more RGA data and see that the chamber
has gotten much cleaner since monday. Next
step would be another bake with some focus |
|
|
227
|
Thu Sep 28 15:17:13 2023 |
Aiden | Update | Clean & Bake | Clean and Bake Batch 16 | Bagged and Tagged the parts from batch 15
and started baking batch 16 which includes
the 6" to 8" reducer. |
|
|
232
|
Tue Oct 3 15:07:48 2023 |
Aiden | Update | Clean & Bake | Clean and Bake Batch 17 | Cleaned and baked all the stainless steel
parts in Batch 17. Check data base for more
details on this. |
|
|
233
|
Sat Oct 7 17:10:27 2023 |
Aiden | Update | Clean & Bake | Clean and Bake Batch 18 | Bagged and tagged the parts from Batch 17
and placed them in the clean room on the
optic table. Also started an aluminum batch |
|
|
237
|
Mon Oct 9 21:41:24 2023 |
Aiden | Update | Clean & Bake | Clean and Bake Batch 19 | Bagged and tagged the parts from batch 18.
Started the Copper batch that includes all
the gaskets needed to start the vacuum chamber |
|
|
239
|
Thu Oct 12 12:11:10 2023 |
Aiden | Update | VAC | Vacuum chamber Helium leak test | [Aiden, Tyler, Peter, Jon]
Continued
tightening bolts on the turbo pump and 6"-8"
reducer to reduce the leak. The final leak |
|
|
240
|
Thu Oct 19 11:41:04 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | [Aiden, Tyler, Mohak]
Took some RGA
data when we came into the room. The pressure
of the chamber was 8.63e-8 Torr before turning |
6x |
|
245
|
Thu Oct 26 13:00:45 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | Bake 6 was turned off on Monday. Tooke RGA
data today and have posted the data below.
The pressure of the chamber after taking |
|
|
246
|
Fri Oct 27 15:16:31 2023 |
Aiden | Update | VAC | Vacuum Leak Test | Leak tested the worst flanges on the chamber
after moving it and after bake 6. The 6 inch
flange connected to the 8 inch reducing nipple |
|
|
251
|
Tue Oct 31 19:46:35 2023 |
Aiden | Update | VAC | VAC System Heating Update | Started bake 7 on Monday but found issues
with the heating as the cross in front of
the RGA got way too hot too quickly. This |
|
|
253
|
Wed Nov 1 20:22:07 2023 |
Aiden | Update | VAC | VAC System Heating Update | Raised the PID controller temperature to 105C
today as at that temperature the lid and
the barrel temperature sensors were reading |
|
|
258
|
Thu Nov 9 13:48:47 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | After bake 7 was stopped on Wednesday morning
(11,8,2023), I took RGA data of the chamber
to compare to a later scan that will be done |
|
|
267
|
Wed Nov 15 21:52:33 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | Took RGA data before running the degas mode.
Made sure to close off the main volume before
running the degas. And left the filament |
|
|
269
|
Thu Nov 16 19:32:31 2023 |
Aiden | Update | VAC | VAC HC Levels Update | Took some more RGA data today and overlaid
it with data taken from October 19. I added
a red line that symbolizes where all amu |
|
|
272
|
Mon Nov 20 20:37:45 2023 |
Aiden | Update | VAC | Clean and Bake Batch 20 | [Aiden, Luis]
Started to clean and bake the
macor parts for the FROSTI reflector. Per
LIGO documentation cleaned the macor in liquinox |
|
|
273
|
Mon Nov 20 20:45:16 2023 |
Aiden | Update | VAC | Leak Test |
[Aiden, Luis]
Tested every weld
and flange to find leaks. Only found that
the flange on the turbo pump and reducing |
|
|
275
|
Tue Nov 21 22:09:44 2023 |
Aiden | Update | General | Testing Parts | [Aiden, Luis]
Luis and Aiden vented
the chamber today. We closed off the RGA
section and then proceeded to open the the |
8x |
|
279
|
Mon Nov 27 19:34:50 2023 |
Aiden | Update | Clean & Bake | Clean and Bake Batch 20 Bagging | Bagged and tagged bath 20 which included the
macor hardware and place it inside the clean
room on the table. |
|
|
280
|
Wed Nov 29 21:13:32 2023 |
Aiden | Update | VAC | VAC System Heating Update | Started Bake 8 today. Set the PID controllers
to 120 C and will check in the morning for
equilibrium temperatures for the lid and |
|
|
282
|
Thu Nov 30 13:58:18 2023 |
Aiden | Update | VAC | VAC System Heating Update | [Aiden]
Came into the lab in the morning
to check on the chamber heating. I decided
to set the PID controllers to 110C rather |
|
|
283
|
Sat Dec 2 18:10:23 2023 |
Aiden | Update | VAC | VAC System Heating Update | [Aiden]
Turned off the heating tape
today in anticipation to take more RGA data
on Sunday or Monday morning before the meeting. |
|
|
284
|
Mon Dec 4 11:19:50 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | [Aiden]
Took some RGA data of the chamber
after it has been cooling down. I do not
believe that this data accurately shows the |
|
|
286
|
Thu Dec 7 12:42:42 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | After leaving the RGA on for a few days the
chamber has settled at 2.01 e-8 torr. I also
have good news that the chamber looks to |
|
|
292
|
Fri Dec 15 14:03:02 2023 |
Aiden | HowTo | VAC | Vacuum Chamber Opening | [Aiden]
1. Turn off the RGA filament
and disconnect it.
2. Record the pressure
and then close the angle valve and gate valve |
|
|
293
|
Sun Dec 17 19:43:18 2023 |
Aiden | Update | VAC | Vac Heating Update | [Aiden]
I measured the temperature of
the flanges where some of the electronics
will go and I found that the RGA flange was |
|
|
295
|
Mon Dec 18 15:51:49 2023 |
Aiden | Update | VAC | VAC System Heating Update | After letting the chamber cool down I put
the electronics back on and turned the RGA
element back on. No data has been taken yet |
|
|
296
|
Tue Dec 19 15:45:05 2023 |
Aiden | Update | VAC | Vacuum Chamber Baking Update | Took RGA data for the macor parts inside of
the chamber. With the Ar open the HC levels
read 30 torrl/s which is around where it |
|
|
299
|
Mon Jan 8 20:24:53 2024 |
Aiden | Update | General | | [Jon, Aiden]
Installed the heater elements
into their fixture and prepped the cables
by twisting the wires into pairs. We also |
|
|
301
|
Tue Jan 9 16:35:09 2024 |
Aiden | Update | VAC | VAC System Leak and Heating | [Luis, Luke, Aiden]
Leak tested each
flange and weld and only found two flanges
to have noticeable leaks with the electron |
|
|
306
|
Tue Jan 16 16:11:41 2024 |
Aiden | Update | VAC | | [Aiden,Luis]
Below is the data for the
most recent bake. I believe the chamber is
cleaner than it is actually showing as the |
|
|
307
|
Wed Jan 17 15:47:49 2024 |
Aiden | Update | General | Resistors for Heater Elements | Power Res (Ohm) RTD Res (Ohm)
Heater
1= 73.6; 81.8
Heater 2= 70.4; 82.1
Heater
3= 71; 84.5
Heater 4= 71.5; 80
Heater |
|
|
308
|
Thu Jan 18 15:13:37 2024 |
Aiden | Update | VAC | VAC Heating System Update | [Aiden]
Took more data today and the
chamber and elements are showing an even
lower HC level than we have gotten before. |
|
|
314
|
Fri Feb 2 19:08:20 2024 |
Aiden | Update | VAC | 1st Hot Element RGA Scan | Here are the measurements for the RGA scan
of the elements while on at around 160C.
The pressure of the chamber during the test |
|
|
316
|
Mon Feb 5 14:17:52 2024 |
Aiden | Update | VAC | Heater Element RGA Scan | Here are the new RGA scans for the powered
Heater elements. The pressure at the time
of taking data was 2.88 e-8 torr. The HC |
|
|
319
|
Thu Feb 8 17:37:48 2024 |
Aiden | Update | VAC | Heater Element RGA Scan | Took more RGA data now that the heaters are
powered by 18V. The pressure of the system
during the data taking was 3.8 e-8 torr. |
|
|
320
|
Mon Feb 12 17:35:47 2024 |
Aiden | Update | VAC | Heater Element RGA Scan | Took more RGA data before and after increasing
the heater elements to 300 degC and before
heating them up.
|
|
|
325
|
Tue Feb 13 12:34:04 2024 |
Aiden | Update | VAC | VAC Heating System Update | Here is an overlay with for all the heating
steps done with the heater elements. |
|
|
328
|
Mon Feb 19 14:17:50 2024 |
Aiden | Update | VAC | Heater Element RGA Scan | Three days after the completion of Bake 11,
the Heater elements RGA scan looks much cleaner.
The HC level is back down to 33 e-10 torrl/s |
|
|
332
|
Tue Feb 20 18:08:24 2024 |
Aiden | Update | General | Degassing the RGA | I took an RGA measurement before and after
degassing the RGA. Both data was taken with
the Argon open. The pressure before taking |
|
|
340
|
Mon Feb 26 15:15:39 2024 |
Aiden | Update | General | Vacuum Chamber Baking Update | Started Bake 12 on Wednesday Feb. 21 and turned
the bake off on Saturday Feb. 24. This was
a normal low temp bake with the PID controllers |
|
|
348
|
Fri Mar 15 16:58:55 2024 |
Aiden | Update | VAC | Vacuum Chamber Frosti Testing | [Luke, Luis, Aiden]
On Thursday, March
14 - Took preliminary RGA scans of the empty
chamber to compare later on. Vented the chamber |
|
|
350
|
Tue Mar 19 15:22:27 2024 |
Aiden | Update | Clean & Bake | FROSTI Legs Clean and Bake | [Aiden, Luke]
Cleaned and baked the
Cal Tech FROSTI legs and showed Luke the
procedure on how to clean parts. |
|
|
352
|
Sun Mar 24 11:49:27 2024 |
Aiden | Update | General | FROSTI RGA Scan | Took RGA data 1 day after the conclusion of
Bake 13. Bake 13 ended on Saturday March
23, the RGA data shown was taken on Sunday |
|
|
353
|
Sun Mar 24 11:50:37 2024 |
Aiden | Update | Clean & Bake | Cal Tech FROSTI Parts | Bagged the FROSTI legs and feet after the
conclusion of the clean and bake. They are
double bagged and sitting in the flow bench. |
|
|
367
|
Mon May 13 14:48:27 2024 |
Aiden | Update | VAC | New Vacuum Chamber Design | I created a new model for the vacuum chamber
based on the ideas from last week's meeting.
It
should be noted that we can not have the |
|
|
372
|
Mon Jun 3 09:24:48 2024 |
Aiden | Update | VAC | Vacuum Chamber Rendering | Here is a new render of the vacuum chamber
that includes the 2.75 tee to place the Argon
leak right next to the RGA. The conical reducer |
|