| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16753
|
Fri Apr 1 22:22:29 2022 |
Koji | Update | Optical Levers | Simplified sketch on MC table | Possibility to swap BS and ITMX
tables:
BS table, which Tega said MC table, |
|
|
16755
|
Mon Apr 4 15:49:06 2022 |
Tega | Update | Optical Levers | Simplified sketch on BS table | I have updated the BS table using feedback
from Koji and Paco and the attached
pdf document is the latest iteration. |
|
|
16761
|
Thu Apr 7 11:47:22 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: AS - LO mode matching |
I begin modeling the initial BHD |
|
|
16763
|
Thu Apr 7 20:33:42 2022 |
Tommy | Update | Electronics | RFSoC 2x2 board -- setup for remote work | To access the board remotely through the
40m lab ethernet port, use
ssh -N -L localhost:1137:localhost:9090 |
|
|
16764
|
Thu Apr 7 20:37:06 2022 |
Tommy | Update | Electronics | RFSoC 2x2 Board -- Simple Tone Generator | In the "Tommy" sub folder, I
created a new notebook called "SimpleToneGenerator".
This tunes the DAC and ADC mixers to a single |
|
|
16765
|
Thu Apr 7 20:41:15 2022 |
Tommy | Update | Electronics | RFSoC 2x2 Board -- Gain Plotter | In this file (under Tommy), we have a notebook
which runs through a spectrum of frequencies
and determines the gain response of the attached |
|
|
16766
|
Thu Apr 7 21:15:04 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: AS - LO mode matching | Ok, it turns out these optics were purchased
on purpose, as this elog
shows. Jon considered building a mode-matching |
|
|
16767
|
Fri Apr 8 16:03:58 2022 |
rana | Update | Electronics | RFSoC 2x2 board -- setup for remote work & BALUN saga | Seems like it should be possible to just
remove the transformer (aka as a BALUN ...
BALanced, UNbalanced), or replace it with |
|
|
16769
|
Mon Apr 11 11:00:30 2022 |
Jancarlo | Update | VAC | C1VAC Reboot and Nitrogen tanks | [Paco, JC, Ian, Jordan, Chub]
Checking in the morning, I walked
over to the Nitrogen tanks to check the levels. |
|
|
16772
|
Tue Apr 12 09:05:21 2022 |
Jordan | Update | VAC | New Pressure Gauge Install/Pump Spool Vent | Today, Tega and I would like to vent the
pump spool an dinstall the new FRG-400 Agilent
Pressure Gauges (per elog 15703). The attached |
6x |
|
16773
|
Wed Apr 13 12:50:07 2022 |
Tega | Update | VAC | New Pressure Gauge Install/Pump Spool Vent | [Jordan, JC, Tega]
We have installed all the FRGs
and updated the VAC medm screens to display |
|
|
16774
|
Wed Apr 13 15:57:25 2022 |
Ian MacMillan | Update | Cameras | Camera Battery Test | Tested the Nikon batteries for the camera.
they are supposed to be 7V batteries but
they don't hold a charge. I confirmed |
|
|
16775
|
Wed Apr 13 16:23:54 2022 |
Ian MacMillan | Update | General | Smell in 40m | [Ian, Paco, JC]
There is a strange smell in the
40m. It smells like a chemically burning |
|
|
16776
|
Wed Apr 13 18:55:54 2022 |
Koji | Update | Cameras | Camera Battery Test | I believe that the Nikon has an exposure
problem and that's why we bought the
Canon. |
|
|
16777
|
Thu Apr 14 09:04:30 2022 |
Jordan | Update | VAC | RGA Volume RGA Scans | Prior to venting the RGA volume on Tuesday
(4/12/2022) I took an RGA scan of the volume
to be vented (RGA+TP1 volume+Manual Gate |
|
|
16782
|
Fri Apr 15 11:59:16 2022 |
Yehonathan | Update | IOO | IMC completely misaligned | Came this morning, opened the PSL and there
was not even a beam on the MC REFL.
Looking at the big monitor it seems |
|
|
16784
|
Mon Apr 18 15:17:31 2022 |
Jancarlo | Update | General | Tool box and Work Station Organization | I cleaned up around the 40 m lab. All the
Laser Safety Glasses have been picked up
and placed on the rack at the entrance. |
|
|
16785
|
Mon Apr 18 16:09:07 2022 |
Yehonathan | Update | BHD | BHD Readout simulation | I'm planning on simulating the BHD
readout noise in a manner very similar to
the ALS noise model using Simulink. I've |
|
|
16787
|
Mon Apr 18 23:22:39 2022 |
Koji | Update | General | Tool box and Work Station Organization | Whoa! Thanks! |
|
|
16788
|
Tue Apr 19 18:10:10 2022 |
Paco | Update | BHD | Part V of BHR upgrade - POX11 path, LO path, and ITMX Oplev | [Yuta, Paco]
We set up POX11 beam path from
ITMX chamber to the ITMX in-air table. To |
|
|
16789
|
Wed Apr 20 08:20:22 2022 |
Paco | Update | BHD | Part V of BHR upgrade - PR2 weirdness | Yesterday, I tried tuning the PR2 damping
gains by increasing the gain until the damping
gave the ~5 oscillations (by watching the |
|
|
16790
|
Wed Apr 20 14:56:06 2022 |
Tommy | Update | Electronics | RFSoC 2x2 board -- setup for remote work & BALUN saga | Here are a few options for replacement
BALUNs from Mini Circuits and specs:
Current. TCM1-83X+, 10-8000 MHz, |
|
|
16791
|
Wed Apr 20 16:11:08 2022 |
Koji | Update | SUS | Outpur resistors updated for LO1 coil drivers / for SR2, LO2, AS1, and AS4 in progress | [JC Koji]
To give more alignment ranges for
the SUS alignment, we started updating the |
6x |
|
16792
|
Wed Apr 20 18:50:03 2022 |
Koji | Update | BHD | Part V of BHR upgrade - PR2 weirdness | It seemed that it comes from the servo
oscillation. This does not happen when the
output limitters were set to be 100-ish. |
|
|
16793
|
Thu Apr 21 10:35:23 2022 |
Koji | Update | CDS | DAQ seemed down | Yesterday, when I worked on the damping
servo, I found that any of the daqvtools
(ndscope, dtt, dataviewer,...) is not available. |
|
|
16794
|
Thu Apr 21 11:31:35 2022 |
JC | Update | VAC | Gauges P3/P4 | [Jordan, JC]
It was brought to attention during
yesterday's meeting that the pressures |
|
|
16795
|
Thu Apr 21 15:22:44 2022 |
Koji | Update | SUS | Outpur resistors updates for SR2, LO2, AS1, and AS4 done | [JC Koji]
Quick report: JC has done all the
mods for the coil driver circuit in the morning |
|
|
16796
|
Thu Apr 21 16:36:56 2022 |
Tega | Update | VAC | cleanup work for vacuum git repo | git repo - https://git.ligo.org/40m/vac
Finally incorporated the FRGs into
the main modbusIOC service and everything |
|
|
16797
|
Thu Apr 21 16:49:01 2022 |
Paco | Update | BHD | Part V of BHR upgrade - BS Oplev + LO1 offset | [Paco, JC, Yuta]
We aligned the BS oplev using the
new BSOL mirror pair. The main change is |
|
|
16799
|
Thu Apr 21 18:18:42 2022 |
yehonathan | Update | BHD | POX Alignment | {Yehonathan, Paco}
BS, ITMX and ETMX were aligned
to get flashing in the X arm. |
|
|
16800
|
Thu Apr 21 18:42:47 2022 |
Tega | Update | BHD | Part V of BHR upgrade - Align LO and AS beams to BHD BS | [Tega, Yuta, Paco]
We tried aligning the LO and AS
beams on to the BHD beamsplitter. During |
|
|
16801
|
Thu Apr 21 20:33:31 2022 |
Koji | Update | BHD | AS1 UR OSEM problem localized in the chamber | Tega and Paco reported that the UR OSEM
of AS1 lost the response.
- I have checked the LED MON (left) |
|
|
16802
|
Fri Apr 22 07:01:58 2022 |
Jc | Update | Coil Drivers | Adding Resistors and Reinstalling | [Koji, JC]
Coil Drivers LO2, SR2, AS4, and
AS1 have been updated a reinstalled into |
8x |
|
16803
|
Fri Apr 22 12:03:09 2022 |
Tega | Update | BHD | AS1 UR OSEM problem localized in the chamber | [JC, Tega, Ian, Paco]
We found that the UR cable was
clamped to the table by one of the ITMY OPLEV |
|
|
16804
|
Fri Apr 22 12:09:51 2022 |
Anchal | Update | Coil Drivers | Please update DCC pages | Nice. Please put this information on the
DCC pages of the coil driver units. You'll
find links to all the units in this document |
|
|
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 | | 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. This |
|
|
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 |
|