| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17690
|
Mon Jul 17 17:52:04 2023 |
Reuben | Update | ALS | Tabletop setup | I wrote a Python code to simulate the AUX
laser stabilisation system. It takes the
poles and zeroes of the individual components |
|
|
17689
|
Mon Jul 17 15:56:22 2023 |
JC | Update | General | Cleanroom Assembly | I've made a cleanroom assembly in solidworks
to create a list of all the components we
will need when making this. Sadly, the 80/20 |
|
|
17688
|
Mon Jul 17 07:47:32 2023 |
Radhika | Update | Daily Progress | T&R measurement setup for PR2 | Just realized I wrote out but failed to
post this ELOG update before I left
last week: |
|
|
17687
|
Sat Jul 15 13:27:39 2023 |
andrei | Update | PEM | Foam setup | Update: we have a working "I"
controller for the puck. Here is the data:
|
|
|
17686
|
Fri Jul 14 17:36:17 2023 |
Hiroki | Update | General | Borrowed beam profilers | I
borrowed two beam profilers (WindCamD and
Beam'R2-DD) and a laptop from the cryo. |
|
|
17685
|
Thu Jul 13 19:34:08 2023 |
Koji | Update | General | Green laser at Y-End | Borrowed an NPRO controller from
Liyuan @ Downs B138
Model M125/6-OPN-PA |
|
|
17684
|
Thu Jul 13 17:20:53 2023 |
yuta | Update | LSC | PRMI 1f not locking stably | PRMI carrier on 1f now locks for ~1min
but not more. Below is the configuration.
The configuration is the same as basically |
|
|
17683
|
Thu Jul 13 17:05:10 2023 |
Koji | Update | General | Green laser at Y-End | The LED blinking on the head is normal.
We can ignore that.
It is likely that the controller |
|
|
17682
|
Thu Jul 13 15:48:34 2023 |
Jc | Update | General | Green laser at Y-End | [Yuta, JC]
Yuta and I tested |
|
|
17681
|
Thu Jul 13 14:47:38 2023 |
yuta | Bureaucracy | General | Things we need to fix |
ETMX damping loops are not good.
ETMX is moving by ~10 urad (if oplev is correctly
calibrated), and beam spot moves by ~0.5 |
|
|
17680
|
Thu Jul 13 12:15:12 2023 |
JC | Update | General | Lab walkthrough | [Koji, JC]
Koji and I had a walkthrough of
the Y Arm and raised questions of what accommodations |
|
|
17679
|
Thu Jul 13 06:18:37 2023 |
Hiroki | Summary | Calibration | Calibrations of actuators and optical gain | [Yuta, Hiroki]
Calibrations |
7x |
|
17678
|
Tue Jul 11 17:21:58 2023 |
Koji | Update | VAC | Pumping down | Manually switched TP2 to "Low Speed
(LS)" mode (aka "Stand by")
|
|
|
17677
|
Tue Jul 11 08:00:16 2023 |
JC | Summary | Daily Progress | Preparing a clean room. | [Yuta, Yehonathan, JC]
We have moved a Smaller |
|
|
17676
|
Mon Jul 10 17:12:02 2023 |
Mayank | Update | Electronics | ETMX Coil Driver Mode | I modified the Binary Input DB9 connector.
The coil drivers are now operating with the
Run/Acq LED off. As per 17656 |
|
|
17675
|
Mon Jul 10 15:22:25 2023 |
yuta | Summary | ASC | IFO alignment is in a strange state | "gain_offset"
for ETMY coil outputs has been turned on
As
mentioned in elog #17671, |
|
|
17674
|
Fri Jul 7 21:54:44 2023 |
andrei | Update | PEM | Foam setup | [andrei, advait]
We wrapped the puck in foam. We
also performed a calibration on the AD590 |
|
|
17673
|
Fri Jul 7 20:34:43 2023 |
Hiroki | Summary | BHD | BHD alignment has been restored | [Yuta, Hiroki]
BHD
alignment has been restored
We |
|
|
17672
|
Fri Jul 7 20:09:53 2023 |
Koji | Summary | ASC | IFO alignment is in a strange state | Before any trial at the ETMX suspension,
ETMX coil driver "Run" mode (a
sort of dewhitened mode) is ON at the coil |
|
|
17671
|
Fri Jul 7 17:29:16 2023 |
yuta | Summary | ASC | IFO alignment is in a strange state | IFO
alignment is in a strange state.
BHD is not fringing, and misalignment |
|
|
17670
|
Fri Jul 7 15:24:38 2023 |
Koji | Configuration | Daily Progress | Alignment and restoring the IFO | The incompleteness of burtrestore is a
critical issue. We need to track down what
is the issue. |
|
|
17669
|
Fri Jul 7 13:33:48 2023 |
JC | Configuration | Daily Progress | Alignment and restoring the IFO | [Yuta, JC]
We are restoring the |
|
|
17668
|
Thu Jul 6 11:25:32 2023 |
yehonathan | Update | Computers | SUS2 is down | SUS2 crashed again. I sshed into sus2 and
tried:
|
|
|
17667
|
Wed Jul 5 11:43:23 2023 |
JC | Update | VAC | Pumpdown begun this morning | [JC, Radhika]
The vacuum system went down over
the weekend due to a loss of N2 pressure |
|
|
17666
|
Wed Jul 5 10:25:31 2023 |
Radhika | Update | Daily Progress | T&R measurement setup for PR2 | After recovering a transmissivity of ~7%
for the 90-10 BS (in AC chopper configuration),
I moved on to PR2. I mounted PR2 on a rotation |
|
|
17665
|
Thu Jun 29 20:10:17 2023 |
Koji | Update | VAC | Pumping down | Towards Vacuum Normal
Closed V7 (Main volume
pumped by TP1/TP2)
Opened VA6 |
|
|
17664
|
Thu Jun 29 01:52:26 2023 |
Koji | Summary | General | IFO back in operation | [Mayank, Hiroki, Koji]
Once we reached 1~2mtorr, we opened
the PSL shutter. |
|
|
17663
|
Wed Jun 28 11:54:23 2023 |
Koji | Update | General | 40m LASER HAZARD | 40m has been transitioned to LASER HAZARD
now.
PSL/ETMX/ETMY NPROs were turned |
|
|
17662
|
Wed Jun 28 10:23:23 2023 |
Hiroki | Update | VAC | Pumping down | [Koji, Mayank, Hiroki]
As Mayank and Koji solved the issue
of opening the gate valves yesterday (ID: |
|
|
17661
|
Tue Jun 27 19:49:37 2023 |
Koji | Update | VAC | Pumping down attemp | [Mayank, Hiroki, Yuta, JC, Koji]
After JC came back from the optical
table placement at Synchrotron, we tried |
|
|
17660
|
Tue Jun 27 19:19:17 2023 |
Koji | Summary | General | 5ft x 12 ft x 2ft optical table removal | [Many]
The large optical table
(5ft x 12ft x 2ft, previously called SP table) |
8x |
|
17659
|
Mon Jun 26 18:37:35 2023 |
Koji | Update | safety | 40m Lab Laser Safe | 40m Lab is now Laser Safe
- The PSL NPRO (Innolight) was
turned off with the OFF switch and the key. |
|
|
17658
|
Mon Jun 26 13:11:18 2023 |
Koji | Update | VAC | N2 Vent | [Yehonathan, Mayank, Hiroki, JC,
Koji]
Vent prep from 10AM |
|
|
17657
|
Mon Jun 26 10:21:44 2023 |
Koji | Update | CDS | Deleted harmful script link on the IFO ALIGN screen | There were a few scripts linked on the
IFO ALIGN screen. These silently ran ASS
and leave (possible) offsets in ASS. When |
|
|
17656
|
Sat Jun 24 21:31:02 2023 |
Mayank | Update | Electronics | Transfer function of the new coil driver board | I measured the transfer function
of the new coil driver board. This was done
to estimate the correct Sim-Dewhithinng and |
|
|
17655
|
Fri Jun 23 10:55:08 2023 |
Andrei | Update | PEM | Lab temperature psd | On Wednesday, Rana showed me that there
are two AD590 sensors in the PSL/FSS refcav.
It seems that one of the sensors is inside |
|
|
17654
|
Fri Jun 23 01:32:46 2023 |
Reuben | Update | ALS | Taking frequency response of the Y arm green laser PDH controller | (Tuesday, Jun 20, 2023)
While the X end hardware was being
updated, I decided to take an open loop transfer |
|
|
17653
|
Fri Jun 23 00:29:16 2023 |
Reuben | Update | ALS | Efforts to align the cavity mirrors | Earlier in the morning I tried to align
the green laser of the X-arm. It was an attempt
to see if green transmission can be brought |
|
|
17652
|
Thu Jun 22 23:09:32 2023 |
Koji | Update | ALS | X end green beam alignment | [Hiroki, Mayank, Ruben, Koji]
As we expected that the X-end PZT
steerers takes more times to be recovered, |
|
|
17651
|
Thu Jun 22 22:34:43 2023 |
Koji | Update | | IFO recovery | [Hiroki, Mayank, Koji]
The X end PZT driver for green
alignment: |
|
|
17650
|
Thu Jun 22 16:01:54 2023 |
rana | Summary | DAQ | NODUS: rsyncd daemon / service set up | if systemctl was handling it, how come
it died? Or did someone kill it on purpose?
I wish we had a tool like Monit or Nagios |
|
|
17649
|
Thu Jun 22 14:21:17 2023 |
Andrei | Update | PEM | Lab temperature psd | I connected
|
|
|
17648
|
Thu Jun 22 01:04:42 2023 |
Koji | Update | | IFO recovery | I wanted to check the oplev functionality
but the IFO was not well aligned. So started
the CDS recovery. |
|
|
17647
|
Thu Jun 22 00:47:00 2023 |
Koji | Update | | IFO working after ETMX electronics upgrade | [Mayank, Koji]
ETMX Sat amp (D080276)
CH3 PD receiver circuit fixed. |
|
|
17646
|
Thu Jun 22 00:27:27 2023 |
Koji | Update | | IFO working after ETMX electronics upgrade | [Koji, Hiroki]
ETMX OPLEV QPD was fixed.
- What we knew was that |
|
|
17645
|
Wed Jun 21 21:01:59 2023 |
Koji | Summary | DAQ | NODUS: rsyncd daemon / service set up | Followed the instruction on this elog to
restart the rsync server daemon
controls@nodus|etc> |
|
|
17644
|
Wed Jun 21 11:16:19 2023 |
Andrei | Update | PEM | Ambient Temperature sensor noise measurements | I found the sensor that we used to measure
the tmeperature in the lab. It is a SensorGateway
(BASE-WIRED) and according to its datasheet |
|
|
17642
|
Wed Jun 21 08:21:03 2023 |
JC | Update | | IFO working after ETMX electronics upgrade | Andrei asked me yesterday for the location
of the ambient temperature sensor for the
X-end. He mentioned that he needed to run |
|
|
17641
|
Tue Jun 20 17:52:39 2023 |
advait | Update | PEM | Early heater prototype | As this circuit is inefficient and can
waste a lot of power through the R resistance,
Rana asked me to come up with a better design |
|
|
17640
|
Tue Jun 20 11:53:09 2023 |
Radhika | Update | Daily Progress | T&R measurement setup for PR2 | The transmissivity setup layout can be
seen in Attachment 1. As in Aaron's measurements
in cryo lab, the DUT beam passes through |
|