| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16805
|
Fri Apr 22 12:15:08 2022 |
Anchal | Update | BHD | Cable post installation | If someone gets time, let's put in
all the cable posts and clean up our cable
routing on the tables. |
|
|
16806
|
Fri Apr 22 14:14:33 2022 |
Jordan | Update | VAC | TP3 Forepump tip seal replacement | Jordan, JC
While the pumpspool is vented,
I thought it would be a convenient time to |
|
|
16807
|
Sun Apr 24 13:17:08 2022 |
Tommy | Update | Electronics | New RFSoC2x2 Overlay | We recieved an overlay from Chris Stoughton
which he used for a ZCU11 board. The overlay
is supposed to be compatible with the RFSoC |
|
|
16808
|
Mon Apr 25 14:19:51 2022 |
JC | Update | General | Nitrogen Tank | Coming in this morning, I checked on the
Nitrogen tanks to check the level. One of
the tanks were empty, so I went ahead and |
|
|
16809
|
Mon Apr 25 14:49:02 2022 |
Koji | Update | General | Nitrogen Tank | For your (and mine) info:
N2 pressure can be monitored on
the 40m summary page: https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20220425/vacuum/ |
|
|
16810
|
Mon Apr 25 16:57:57 2022 |
Anchal | Update | BHD | Cable post installation | [Anchal, Tega, JC]
We installed cable posts in ITMY,
BS, and ITMX chambers for all the new suspensions. |
|
|
16811
|
Mon Apr 25 17:24:06 2022 |
Anchal | Update | CDS | DAQ still down | I investigated this issue today. At first,
it seemed that only new suspension testpoints
are inaccessible. I was able to use diaggui |
|
|
16812
|
Mon Apr 25 18:00:03 2022 |
Ian MacMillan | Update | Upgrade | Cable supports update | I have designed new cable supports for
the new ribbon cables running up the side
of the tables in the vacuum chambers. |
|
|
16813
|
Tue Apr 26 16:23:22 2022 |
Tommy | Update | Electronics | RFSoC2x2 MTS | We connected a 8 MHz signal generator to
the device in order to sync up the ADCs and
DACs and hopefully get phase data. |
|
|
16814
|
Wed Apr 27 10:05:55 2022 |
JC | Update | Coil Drivers | Coil Drivers Update | 18 (9 pairs) Coil Drivers have been modified.
Namely ETMX/ITMX/ITMY/BS/PRM/SRM/MC1/MC2/MC3.
|
|
|
16816
|
Thu Apr 28 09:12:18 2022 |
Anchal | Update | BHD | Restoring arm alignment | This would be a daily first task in the
morning. We'll need to check the status
of arm alignment and optimize it back to |
|
|
16818
|
Thu Apr 28 17:45:53 2022 |
Anchal | Update | BHD | POX Beam issues | [Anchal, Paco]
We investigated the low power issue
with POX11 photodiode. |
|
|
16819
|
Thu Apr 28 18:07:04 2022 |
Anchal | Update | BHD | Restoring arm alignment at EOD | Restored arm algiment to get 0.8 max flashing
on YARM and 1 max flashing on XARM. I had
to move input alignment using TT2-PR3 pair |
|
|
16820
|
Fri Apr 29 08:34:40 2022 |
JC | Update | VAC | RGA Pump Down | Jordan and I, in order to start pumpig
down the RGA Volume, we began by opening
V7 and VM. Afterwards, we started RP1 and |
|
|
16821
|
Sat Apr 30 13:29:33 2022 |
Paco | Update | BHD | POX Beam issues --- fixed, ASL alignment on vertex chamber | [Paco, Anchal, Yuta]
We opened the BSC and ITMX chamber
in the morning (Friday) to investigate POX11 |
|
|
16822
|
Mon May 2 10:00:34 2022 |
Jordan | Update | VAC | TP3 Forepump tip seal replacement | [JC, Jordan]
Jordan recieved the new tip seal
Friday afternoon and I continued the replacement |
|
|
16823
|
Mon May 2 13:30:52 2022 |
JC | Update | Coil Drivers | Coil Drivers Update | The DCC has been updated, along with the
modified schematic. Links have been attached.
|
|
|
16824
|
Mon May 2 17:51:30 2022 |
Anchal | Update | BHD | POX Beam aligned on RFPD, YARM locked | [Paco, Anchal]
We found that one of the Y1-1037-45P
marked mirror that we used was actually curved. |
|
|
16825
|
Tue May 3 13:18:47 2022 |
JC | Update | VAC | RGA Pump Down | Jordan, Tega, JC
Issue has been resolved. Breaker
on RP1 was tripped so the RP1 button was |
|
|
16827
|
Tue May 3 21:05:23 2022 |
yuta | Update | BHD | AS path alignment, removing a lot of green stuff | [Tega, Yehonathan, Koji, Yuta]
We tried to align AS path this afternoon. |
7x |
|
16828
|
Tue May 3 21:07:17 2022 |
Yehonathan | Update | BHD | BHD Readout simulation | I feel like there is an instability in
my thought process on this. Before my tendency
to try to scale and generalize this problem |
|
|
16829
|
Wed May 4 13:09:42 2022 |
Anchal | Update | BHD | IMC table balanced again, IMC is locking, YARM is locking | [Paco, JC, Anchal]
We balanced the IMC table back
again to point that got us 50% of nominal |
|
|
16830
|
Wed May 4 15:08:59 2022 |
Tega | Update | BHD | XARM alignment to get flashing | [Yuta, Tega]
We aligned the BS, ITMY, and ETMY
PIT and YAW to get the flashing on X-arm |
|
|
16831
|
Wed May 4 18:52:43 2022 |
Tega | Update | BHD | POP beam too high at POP SM4 on the ITMX chamber | [Yuta, Tega]
We needed to sort out the POXDC
signal so we could work on X-arm alignment. |
|
|
16832
|
Thu May 5 14:46:22 2022 |
Anchal | Update | BHD | POP beam height lowered, POP_SM4 raised | [Anchal, JC]
We first aligned the single arm
cavity resonance for both arms to get maximum |
|
|
16833
|
Thu May 5 17:05:31 2022 |
Tega | Update | BHD | IMC & X/Y-arm alignment | [Yuta, Tega]
In order to setup POP camera and
RFPD on the ITMX table, we decided to first |
|
|
16834
|
Thu May 5 17:50:48 2022 |
Yehonathan | Update | BHD | BHD Readout simulation | I have made a Simulink diagram to use in
the MICH modeling (attachment) for the homodyne
angle detection scheme. The model will be |
|
|
16835
|
Fri May 6 13:48:34 2022 |
Anchal | Update | BHD | WFS loop instability fixed | [Yuta, Anchal]
We investigated why WFS loop wasn't
working. It seemed like WFS1 PIT error signal |
|
|
16837
|
Mon May 9 18:43:03 2022 |
Anchal | Update | BHD | ITMX table layout corrected | As I went to correct the ITMX Oplev mirrors,
I found that both mirrors were placed in
very different positions than the design |
|
|
16838
|
Mon May 9 18:49:05 2022 |
Tega | Update | BHD | Relocate green TRX and TRY PDs/cams/optics from PSL table to BS table | [Paco, Tega]
Started work on the relocating
the green transmission optics, cameras and |
|
|
16839
|
Mon May 9 22:19:06 2022 |
Koji | Update | BHD | BHD Platform Progress status | [Don, Koji]
Don is working on finalizing the
BHD Platform design. All the components on |
|
|
16840
|
Mon May 9 23:18:44 2022 |
Koji | Update | BHD | BHD Platform Progress status | I quickly ran the FEA model to check the
resonant freqs of the BHD platform.
The boundary conditions were: |
6x |
|
16842
|
Tue May 10 15:46:38 2022 |
JC | Update | BHD | Relocate green TRX and TRY components from PSL table to BS table | [JC, Tega]
Tega and I cleaned up the BS OPLEV
Table and took out a couple of mirrors and |
|
|
16843
|
Tue May 10 16:31:14 2022 |
Tega | Update | BHD | ITMX optlev return beam steered to QPD | Followed the steps below to complete the
ITMX optlev installation. The ITMX optlev
return beam now reaches its QPD without being |
|
|
16844
|
Tue May 10 18:25:43 2022 |
Paco | Update | BHD | Green Transmission path | [Yuta, Paco]
We installed GRX_SM1,
GRX_SM2, and finished aligning |
|
|
16845
|
Wed May 11 15:49:42 2022 |
JC | Update | OPLEV Tables | Green Beam OPLEV Alignment | [Paco, JC]
Paco and I began aligning the Green
Beam in the BS Oplev Table. while aligning |
|
|
16846
|
Thu May 12 13:46:59 2022 |
Jc | Update | Alignment | POP Beam | [Tega, JC]
Tega and I went in to adjust the
POP being in the ITMX Table. The beam entered |
|
|
16847
|
Thu May 12 17:20:08 2022 |
Paco | Update | Alignment | POP Beam on CCD | [Paco]
Got POP beam centered on camera
and nominally on the two PDs. Attachment |
|
|
16848
|
Thu May 12 19:55:01 2022 |
Tega | Update | BHD | AS path alignment | [Yuta, Tega]
We finally managed to steer the
AS beam from ITMY chamber, through BS and |
|
|
16849
|
Thu May 12 20:11:18 2022 |
Anchal | Update | BHD | BHDBS Output beams steered out to ITMY table | I successfully steered out the two output
beams from BHD BS to ITMY table today. This
required significant changes on the table, |
|
|
16850
|
Thu May 12 20:24:29 2022 |
yuta | Update | BHD | POX and POY investigation | [Anchal, Yuta]
We checked POX and POY RF signal chains |
|
|
16851
|
Fri May 13 14:26:00 2022 |
JC | Update | Alignment | LO2 Beam | [Yehonathan, JC]
Yehonathan and I attempted to align
the LO2 beam today through the BS chamber |
|
|
16852
|
Fri May 13 18:42:13 2022 |
Paco | Update | Alignment | ITMX and ITMY sat amp failures | [Yuta, Anchal, Paco]
As described briefly by JC, there
were multiple failure modes going during |
|
|
16853
|
Sat May 14 08:36:03 2022 |
Chris | Update | DAQ | DAQ troubleshooting | I heard a rumor about a DAQ problem at
the 40m.
To investigate, I tried retrieving |
|
|
16854
|
Mon May 16 10:49:01 2022 |
Anchal | Update | DAQ | DAQ troubleshooting | [Anchal, Paco, JC]
Thanks Chris for the fix. We are
able to access the testpoints now but we |
|
|
16855
|
Mon May 16 12:59:27 2022 |
Chris | Update | DAQ | DAQ troubleshooting | It looks like the RFM problem started a
little after 2am on Saturday morning (attachment
1). It’s subsequent to what I did, |
|
|
16856
|
Mon May 16 13:22:59 2022 |
yuta | Update | BHD | REFL and AS paths aligned at AP table | After Xarm and Yarm were aligned by Anchal
et al, I aligned AS and REFL path
in the AP table. |
|
|
16857
|
Mon May 16 14:46:35 2022 |
Tommy | Update | Electronics | RFSoC MTS Work | We followed the manual's guide for
setting up MTS to sync on external signal.
In the xrfdc package, we update the RFdc |
|
|
16858
|
Mon May 16 16:13:01 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: Damped suspension model | I was finally able to set up a stable suspension
model with the help of Yuta and I'm now
ready to start doing some MICH noise |
|
|
16859
|
Mon May 16 19:14:17 2022 |
Anchal | Update | BHD | Camera set on AS path and BHDBS output path | [Anchal, Paco, Yuta]
We aligned AS path avoiding
any clipping to the AP table where we setup |
|