| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17560
|
Mon Apr 24 19:11:20 2023 |
Koji | Summary | BHD | LO/MI(DARM) signal strength comparison between the configurations | Yuta and I had a discussion last week about
the signal strength between the configurations.
Here are some naive calculations. |
|
|
17561
|
Tue Apr 25 15:51:21 2023 |
Jc | Update | IMC | IMC has been tripping | It has happened multiple times today that
IMC has tripped on its own. Yehonathan and
I have had to come back to manually lock |
|
|
17562
|
Tue Apr 25 17:06:17 2023 |
Anchal | Update | ALS | DFD demod normalized by amplitude | I modified the analysis to correct for
any affects due to Anti-Aliasing or Anti-Imaging
filters, and I also found a insignificant |
|
|
17563
|
Tue Apr 25 21:21:03 2023 |
Yehonathan | Update | BHD | Dewhitening noises | {Mayank, Paco, Yehonathan}
Dewhitening noise curves were taken
using SR785+SR560 for the PRMI noise budget. |
|
|
17564
|
Wed Apr 26 09:37:10 2023 |
Paco | Update | BHD | IQ demod board gains for REFL11 and AS55 | We
measured the IQ demodulation board gains
for REFL11 and AS55. |
|
|
17565
|
Wed Apr 26 11:27:49 2023 |
Paco | Summary | BHD | LO/MI(DARM) signal strength comparison between the configurations with finesse | I'm
checking Koji + Yuta's not-so-naive calculations
using finesse. |
|
|
17566
|
Wed Apr 26 12:05:10 2023 |
Radhika | Update | ALS | XEND green PDH controller | Tl;dr:
Tried to replace of XEND green PDH servo
controller with Moku template IIR filter, |
|
|
17567
|
Wed Apr 26 12:59:42 2023 |
Yehonathan | Update | BHD | Updated noise budget with output electronics | I included the output electronic noises
into the PRMI carrier noise budget (attachment
1). |
|
|
17568
|
Wed Apr 26 18:41:56 2023 |
Paco | Update | OPLEV Tables | ITMX oplev laser died | [Paco, Koji, Mayank]
We replaced ITMX Oplev |
|
|
17570
|
Fri Apr 28 18:40:49 2023 |
Yehonathan | Update | BHD | Updated noise budget with some input electronic noises | {Mayank, Yehonathan}
Yesterday, we measured AS55 and
REFL11 dark noises at the IQ demod boards |
|
|
17571
|
Fri Apr 28 20:17:37 2023 |
yuta | Summary | ASC | IFO alignment in bad shape | [Mayank, Paco, Yuta]
IFO alignment is not good. |
|
|
17572
|
Fri Apr 28 20:56:06 2023 |
Koji | Summary | ASC | IFO alignment in bad shape | I suppose ASS Y arm is using PR2/3 to align
the beam to the arm.
Can't we have ASS PRM bring the |
|
|
17573
|
Mon May 1 08:57:45 2023 |
JC | Configuration | IMC | Bad Alignment | I had to realign the IMC today. When I
came in, it was very bad, not much flashing
at all, I had to do it from scratch. CH01 |
|
|
17574
|
Mon May 1 14:45:48 2023 |
Mayank | Summary | LSC | Attenuated BHD DC Beam | [Yuta, Mayank]
UPDATE: It turned out that the
pair of 0.3 OD ND filters we used were not |
|
|
17575
|
Mon May 1 16:51:20 2023 |
Paco | Summary | ASC | IFO alignment in bad shape | [Yuta, Mayank, JC, Paco]
We fixed the IFO nominal |
|
|
17577
|
Tue May 2 10:39:49 2023 |
JC | Configuration | IMC | Bad Alignment | It took a while, but I was finally able
to align IMC. It seems like WFS has been
getting really whacky lately when we arent |
|
|
17578
|
Tue May 2 17:33:53 2023 |
Mayank | Summary | LSC | Locked PRMI in carrier for an hour with LO phase controlled using BH55 | [Mayank, Radhika, Paco]
We locked PRMI for |
|
|
17579
|
Wed May 3 12:11:52 2023 |
Yehonathan | Update | BHD | Updated noise budget with measured noise and OLTF | {Paco, Yehonathan, Yuta}
Paco and Yuta locked PRMI carrier
and I took the MICH OLTF measurement (attachment |
|
|
17580
|
Wed May 3 15:06:44 2023 |
yuta | Summary | LSC | POP attenuation and PRMI PRG estimate | [Paco, Yuta]
|
|
|
17581
|
Wed May 3 16:24:07 2023 |
Paco | Summary | LSC | Attenuated BHD RFPD paths | [Yuta, Paco]
We attenuated RFPD |
|
|
17582
|
Wed May 3 18:40:50 2023 |
Yehonathan | Update | BHD | Whitening noises measurements | {Mayank, Yehonathan}
We measured the noise at the WF1
(REFL11) and WF2 (AS55) boards at the LSC |
|
|
17583
|
Thu May 4 17:14:15 2023 |
Paco | Summary | LSC | PRMI (MICH and PRCL) calibrated displacement and BS angle to MICH couplings | [Mayank, Paco]
We calibrated PRCL |
|
|
17584
|
Mon May 8 17:05:30 2023 |
Yehonathan | Update | BHD | Whitening TF measurements | {Mayank, Yehonathan}
We measured today the TFs of the
whitening boards. We measured in particular |
|
|
17585
|
Tue May 9 11:32:04 2023 |
Yehonathan | Update | BHD | Whitening TF measurements | We forgot to take a reference TF measurement
by looping the SR785 on itself using the
same BNC cables used for the actual measurement. |
|
|
17586
|
Tue May 9 12:06:35 2023 |
Radhika | Update | ALS | XEND green PDH controller | [Mayank, Radhika]
I retook a transfer function measurement
of the uPDH servo closed-loop (using the |
|
|
17587
|
Tue May 9 21:02:55 2023 |
Radhika | Update | ALS | XEND green PDH controller | XAUX
laser locked with Moku:Go controller
The analog zeros and poles used |
|
|
17588
|
Wed May 10 11:49:34 2023 |
Yehonathan | Update | BHD | Updated PRMI AS55+REFL11 noise budget | I
added input noises and angle to length coupling
to the noise budget. |
|
|
17589
|
Wed May 10 17:11:34 2023 |
Paco | Update | ASC | FPMI differential ASC - I | I
began commissioning the AS WFS for (PR)FPMI
configurations |
|
|
17590
|
Thu May 11 12:05:24 2023 |
rana | Update | BHD | Updated PRMI AS55+REFL11 noise budget | Is the A2L coming from the optical lever
feedback? If so, we can make a 30 Hz ELP
to cut it off by 60 Hz. |
|
|
17591
|
Sat May 13 11:37:41 2023 |
rana | Update | General | StripTool -> NDscope: PSL on wall | As a test, I have replaced the PSL StripTool
on the north wall of the control room with
a nearly equivalent NDScope display. It is |
|
|
17592
|
Mon May 15 18:34:05 2023 |
Paco | Summary | LSC | Locked PRMI in carrier and LO phase with BH44 and achieved handoff to BHDC_DIFF | [Yuta, Paco]
We locked PRMI-BHD |
|
|
17593
|
Tue May 16 08:42:14 2023 |
Paco | Update | ASC | FPMI differential ASC - II | We
aligned the AS WFS and measured some angular
motion from ETMX |
|
|
17594
|
Wed May 17 12:09:11 2023 |
Yehonathan | Update | Electronics | Preping for new coil drivers commissioning in 1X4 | It's time to start commissioning the
new coil drivers. The Acromag box is already
there but it needs to be modified. |
|
|
17595
|
Fri May 19 09:23:58 2023 |
Paco | Update | | MCF Noise | The fan behind the
PSL controller is injecting excess band limited |
|
|
17597
|
Fri May 19 13:25:03 2023 |
Koji | Update | PSL | MCF Noise | This is super! And now is the time to replace
the internal fan!
|
|
|
17598
|
Fri May 19 15:25:00 2023 |
Mayank | Update | PSL | PSL tripped - removed internal fans | We removed the PSL
controller internal (broken) fans after it |
|
|
17599
|
Wed May 24 11:50:34 2023 |
JC | Summary | SEI | STACIS | [Mayank, JC]
STACIS |
|
|
17600
|
Wed May 24 13:19:28 2023 |
Paco | Update | BHD | BH44 and BH55 dc transimpedance modified | We lowered the BH44
and BH55 DC transimpedances to ~ 50 V/A |
|
|
17601
|
Wed May 24 17:36:25 2023 |
Paco | Update | BHD | BH44_I content and PRC alignment | BH44
is sensitive to PRC alignment noise
[Paco, Yuta] |
|
|
17602
|
Thu May 25 13:38:28 2023 |
advait | Summary | PEM | Existing temperature control hardware | Over the past few days I have been trying
to understand the existing sensor and heater
related hardware by manual inspection and |
|
|
17603
|
Thu May 25 14:40:03 2023 |
Paco | Update | Calibration | Measured the PSL wavelength | The PSL wavelength
is 1064.5068 +- 0.0015 nm |
|
|
17604
|
Fri May 26 11:16:46 2023 |
Anchal | Summary | PEM | Temperature sensing circuit with AD590 | I wanted to mention here that I have a
printed circuit board design (LIGO-D1800304)
for using AD590 as temperature sensors. I |
|
|
17605
|
Fri May 26 15:04:12 2023 |
JC | Update | PSL | PSL Fans Replaced | We Changed
The Fans on the PSL
To
start, the part Koji ordered is 259-1818-ND |
|