| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
16771
|
Mon Apr 11 21:44:14 2022 |
Koji | Summary | BHD | Part IIa of BHR upgrade - POY11 debugging | We took out the right most PD interface
board D990543 and removed the 74LS04 chips.
In fact two out of 4 were already replaced |
|
|
16770
|
Mon Apr 11 21:13:21 2022 |
Paco | Summary | BHD | Part IIa of BHR upgrade - POY11 debugging | [Paco, Koji]
I asked Koji for some advice regarding
closing the loop on YARM using POY11. A few |
|
|
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. |
|
|
16768
|
Fri Apr 8 17:21:31 2022 |
Ian MacMillan | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Yarm | [Ian, Paco, Tega]
Paco and I opened the ETMY and
ITMY chamber to work on yesterdays efforts |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
16762
|
Thu Apr 7 17:59:51 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Yarm | [Anchal, Paco, JC, Tega]
Today we have aligned the Yarm
cavity for IR, with verified 1.5 roundtrips. |
|
|
16761
|
Thu Apr 7 11:47:22 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: AS - LO mode matching |
I begin modeling the initial BHD |
|
|
16760
|
Wed Apr 6 22:51:47 2022 |
Koji | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Xarm | [Yuta Koji]
We took out the two coil driver
units for PR3 and the incorrect arrangement |
|
|
16759
|
Wed Apr 6 12:03:51 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Yarm | [Anchal, Paco]
After Koji reduced the output resistors
on PR2/PR3 coil drivers, we got much better |
|
|
16758
|
Wed Apr 6 01:20:48 2022 |
Koji | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Xarm | PR2/PR3 Output R for fame OSEMS reduced
from 1.2K to 1.2K//100Ohm
I |
|
|
16757
|
Tue Apr 5 18:15:06 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Xarm | [Paco, Anchal, Ian, JC]
We attempted the alignment of IR
beam into the arm cavities. We used PR2 and |
|
|
16756
|
Mon Apr 4 17:03:47 2022 |
Anchal | Summary | CDS | c1susaux2 slow controls acromag chassis fixed and installed | [Anchal, JC, Ian, Paco]
We have now fixed all issues with
the PD mons of c1susaux2 chassis. The slow |
|
|
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. |
|
|
16754
|
Sat Apr 2 15:46:13 2022 |
rana | Summary | PEM | Particle counter setup near BS Chamber | nice - please update the particle counter
page in the 40m wiki. Its probably years
out of date. |
|
|
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, |
|
|
16752
|
Fri Apr 1 17:02:02 2022 |
Koji | Update | Optical Levers | Simplified sketch on MC table | We are supposed to have BS Oplev Beams.
We don't like the shallow angle reflections
(i.e. AOI>45deg). |
|
|
16751
|
Fri Apr 1 14:26:50 2022 |
Tega | Update | Optical Levers | Simplified sketch on MC table | Here is an early sketch
of the MC table.
|
|
|
16750
|
Fri Apr 1 14:26:19 2022 |
Ian MacMillan | Summary | PEM | Particle counter setup near BS Chamber | I mounted the particle counter over the
BS chamber attached to the cable tray as
seen in Attachment 1. The signal cable runs |
|
|
16749
|
Thu Mar 31 18:58:16 2022 |
Ian MacMillan | Summary | BHD | Part IIa of BHR upgrade - IR laser alignment on Xarm | [Ian, Paco]
We continued to try and lock the
IR laser to the x-arm. Last time we adjusted |
|
|
16748
|
Tue Mar 29 17:35:54 2022 |
Paco | Update | SUS | Damping fix on BS, AS4, PR2, and PR3 | [Ian, Paco]
We removed the "cheby"
filters from AS4, PR2 and PR3 which had been |
|
|
16747
|
Tue Mar 29 15:07:11 2022 |
Tega | Summary | VAC | Opening of MC and ETM chambers | [Anchal, Chub, Ian, Paco, Tega]
Today, we opened the MC chamber,
ETMX chamber and ETMY chamber. |
|
|
16746
|
Mon Mar 28 16:25:34 2022 |
Ian MacMillan | Update | SUS | ETMY SUS Electronics Replacement - Questions | The point of changing the gains was to
return the system to its origional state.
ie I wanted the over all gain of the physical |
|
|
16745
|
Sat Mar 26 13:04:38 2022 |
Paco | Summary | BHD | Part IIa of BHR upgrade - Green laser alignment on Yarm | I came for a bit to check on the "1Y0
burning smell" reported by Koji last
evening. I agree that there's a toasty |
|
|
16744
|
Fri Mar 25 18:20:28 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - Green laser alignment on Yarm | [Anchal, Paco, Shruti]
Today we found out that
the laser controller at the Yend had it's |
|
|
16743
|
Fri Mar 25 11:39:14 2022 |
Anchal | Update | SUS | ETMY SUS Electronics Replacement - Questions | After Ian updated the cts2um filters for
OSEM, shouldn't the damping gains be
increased back by factor of 10 to previos |
|
|
16742
|
Thu Mar 24 19:20:28 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - Green laser alignment on Yarm | [Anchal, Paco]
Uneloged: yesterday, Paco
and Ian tried locking the green laser on |
|
|
16741
|
Mon Mar 21 18:42:06 2022 |
Anchal | Summary | CDS | c1auxey1 slow controls issues | Another issue, Green Y Shutter can not
be controlled with the EPICS controls right
now. This needs to be investigated. |
|
|
16740
|
Mon Mar 21 18:24:07 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - Green laser alignment on Yarm | [Anchal, Tega]
We did the following alignment
steps on Yarm today: |
|
|
16739
|
Mon Mar 21 18:00:05 2022 |
Ian MacMillan | Update | BHD | XARM AUX alignment cont. | [Ian, Paco]
Continuing with the previous alignment
that we stoped on friday, we re set up my |
|
|
16738
|
Mon Mar 21 14:22:52 2022 |
Anchal | Update | SUS | ETMY Alignmnet offsets needed to be changed | I'm not sure why but the PIT and YAW
offset values of +2725 and -2341 were not
sufficient for the reflected OPLEV beam to |
|
|
16737
|
Fri Mar 18 19:10:51 2022 |
Anchal | Summary | CDS | c1auxey1 slow controls issues | I started the modbusIOC service on c1auxey1
and added PD variance channels for UR and
SD as well. There are unfortunately |
|
|
16736
|
Fri Mar 18 18:39:13 2022 |
Yehonathan | Summary | CDS | c1auxey1 slow controls acromag chassis installed, powered | {Yehonathan, Anchal}
We connected the c1auxey1 chassie
to the different boxes (coil drivers, SAT |
|
|
16735
|
Fri Mar 18 17:15:19 2022 |
Paco | Update | BHD | XARM AUX alignment cont. | [Paco, Ian]
First, we re-balanced the ITMX
OSEMs so that they would damp at around half-a-shadow. |
|
|
16734
|
Thu Mar 17 19:12:44 2022 |
Anchal | Summary | CDS | c1auxey1 slow controls acromag chassis installed, not powered | [Anchal, Tega]
We installed c1auxey1 computer
and the acromag chassis in 1Y4. The computer |
|
|
16733
|
Thu Mar 17 17:23:22 2022 |
Anchal | Summary | BHD | Part IIa of BHR upgrade - Green laser alignment | [Anchal, Yehonathan] (on Y Arm)
We first checked if the PZT mirrors
M1 and M2 can be controlled. They indeed |
|
|
16732
|
Thu Mar 17 16:50:53 2022 |
Paco | Update | BHD | XARM AUX alignment | [Ian, Paco]
We opened the ITMX chamber and
Inspected PR2 and LO1 and |
|
|
16731
|
Thu Mar 17 11:40:41 2022 |
Paco | Update | SUS | ETMY green PZT HV supply | [Anchal, Paco]
We installed a HV kepco power supply
for the green PZT steering the YAUX beam. |
|
|
16730
|
Tue Mar 15 18:45:12 2022 |
Anchal | Summary | BHD | Part X of BHR upgrade - BHDBS Path setup | [Paco, Anchal]
BS Chamber work
ASL
was positioned in nominal place.
PR3 |
|
|
16729
|
Tue Mar 15 18:42:37 2022 |
Anchal | Summary | BHD | Part IX of BHR upgrade - AS1 resuspended and OSEMs tuned | http://nodus.ligo.caltech.edu:8080/40m/16722
http://nodus.ligo.caltech.edu:8080/40m/16716 |
|
|
16728
|
Tue Mar 15 14:10:41 2022 |
Anchal | Summary | CDS | c1su2 model remade, reinstalled, restarted after the update | I have restarted c1su2 model with the connections
of Run Acquire switch to analog filters on
coil drivers. Following steps were taken: |
|
|
16727
|
Tue Mar 15 13:49:44 2022 |
Ian MacMillan | Bureaucracy | Treasure | New Screwdriver Bits | I have received the new screwdriver bits
that will work with the two electric screwdrivers
we have. I have distributed them in the 40m. |
|