| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2611
|
Fri Jan 28 15:18:27 2022 |
Anchal | Summary | Equipment loan | CTN raided by 40m tribes | [Anchal, Paco]
CTN was raided today afternoon
between 2 pm and 3 pm by 40m tribes. They |
|
|
2352
|
Wed May 29 18:50:18 2019 |
anchal | DailyProgress | FSS | North FSS F and Crossover Frequency Measurement | I took the transfer function of North FSS
side to see how much suppression we are doing.
I took the transfer function by sending source |
|
|
637
|
Mon Jul 25 21:02:25 2011 |
frank, raphael, tara | Notes | FSS | TF of EOM | We measured EOM's transfer function
again. The result is unexpected, it is flat
from ~ 100k to 1MHz, instead of going up |
|
|
648
|
Tue Aug 2 23:58:40 2011 |
tara | DailyProgress | optic | New RCAV setup is locked | RCAV is locked, I have not
optimized the mode matching yet, the coupling
efficiency is ~ 67%. |
|
|
653
|
Tue Aug 9 00:39:30 2011 |
tara | DailyProgress | optic | RCAV modematching optimized | I optimized mode matching for RCAV.
The coupling is ~75%. I also minimized
RFAM from the 35.5MHz EOM. |
|
|
658
|
Mon Aug 15 23:13:53 2011 |
tara | DailyProgress | optic | RCAV modematching optimized | I recalculated the mode matching
so that the spot radius in AOMs is 100 um.
Now the visibility of RCAV is 90%. |
|
|
659
|
Wed Aug 17 20:41:13 2011 |
tara | DailyProgress | optic | ACAV path is up | I put most optics on ACAV path. I have
not tried to lock the cavity yet. I'll install
ACAV RFPD next. |
|
|
2108
|
Tue Feb 27 14:17:13 2018 |
Aaron | DailyProgress | TempCtrl | High Current Draw for Vaccan Temp Control Causing Nonlinear Voltage Spikes | I think I'm seeing a similar problem
that y'all were when I use my heater
circuit (which is I believe the same as your |
|
|
1538
|
Wed Feb 4 17:29:29 2015 |
Aidan | Summary | Documentation | Electronics and power chassis connection summary | I spent this afternoon tracing out all
the connections to and from all the
chassis in the CTN lab. |
|
|
1539
|
Mon Mar 30 14:22:36 2015 |
Aidan | Notes | Computers | Ordered Acromag slow controls test unit | I ordered the following Acromag units for
a new slow controls test setup. The
idea is to replace the Sun workstation |
|
|
1540
|
Mon Mar 30 14:24:48 2015 |
Aidan | Notes | Computers | Lab workstation has died | The Windows XP workstation in the lab died
last week. After booting up to the "Windows
XP" screen it reported a hardware problem. |
|
|
1541
|
Mon Mar 30 14:29:25 2015 |
Aidan | Summary | Environment | Cleaning underway | I've started removing a lot of
the miscellaneous hardware from the lab (old
pieces of Bosch framing, sheets of acrylic/plastic, |
|
|
1542
|
Tue Mar 31 11:43:37 2015 |
Aidan | Summary | Computers | Rebooted VME and added sitemap | Aidan
Aidan rebooted the Sun machine
and VME. It took a while to get the EPICS |
|
|
1543
|
Wed Apr 1 17:33:08 2015 |
Aidan | DailyProgress | PMC | Laser out of alignment to PMC | I've been trying to lock the laser
to the PMC since we adjusted the Faraday.
It's basically badly out of alignment |
|
|
1545
|
Thu Apr 9 17:03:35 2015 |
Aidan | Summary | Computers | Acromag ADC set up | I set up an Acromag slow controls based
on the procedure that Keith wrote in T1400200.
It's really pretty easy. It took an hour |
|
|
1547
|
Wed Apr 15 17:51:43 2015 |
Aidan | Summary | DAQ | Acromag XT1541 DAC working correctly - a little trick to configure | Aidan.
Success!
I configured the Acromag XT1541 |
|
|
1548
|
Thu Apr 16 13:31:32 2015 |
Aidan | Summary | DAQ | Acromag XT1541 DAC working correctly - a little trick to configure | https://nodus.ligo.caltech.edu:30889/ATFWiki/doku.php?id=main:resources:computing:acromag
|
|
|
1549
|
Mon May 18 16:49:59 2015 |
Aidan | Summary | PMC | Realigning PMC with rubbish input beam | I'm practicing the procedure of aligning
the PMC. The input beam isn't great (I
might be clipping a little on the Faraday). |
|
|
1559
|
Sat Aug 1 09:29:25 2015 |
Aidan | Summary | Environment | Cleaned computer table. Added Acromag | I cleaned the table with the computers
and removed one of the monitors. I installed
the Acromag units to the rack, powered them |
|
|
1561
|
Tue Aug 4 14:15:14 2015 |
Aidan | Summary | Computers | DAQD not running on FB2. FB2 trend disk is full | Like the title says ...
If I try running DAQD per https://nodus.ligo.caltech.edu:30889/ATFWiki/doku.php?id=main:experiments:psl:add_channel_for_daq_in_fb2
then it fails and the log file |
|
|
1564
|
Wed Aug 5 10:18:54 2015 |
Aidan | Summary | Computers | Summary of installation of Acromag units and control workstation | Summary of installation of new hardware:
ACROMAG1 computer.
|
|
|
1571
|
Fri Aug 14 19:10:39 2015 |
Aidan | Summary | TempCtrl | Dropped lab temperature set point from 72F to 68F | At 7:07PM
|
|
|
1572
|
Mon Aug 17 17:02:41 2015 |
Aidan | Summary | Computers | Acromag binary outputs working - still can't control TTFSS box though | I managed to figure out the modbusDrv configuration
settings to get the binary output of the
Acromag working. I've updated the Wiki |
|
|
1573
|
Wed Aug 19 10:34:33 2015 |
Aidan | Summary | DAQ | Binary IO control of TTFSS box working - can lock PDH remotely | I've worked out how to get the binary
IO to work with the TTFSS box so that we
can activate switches in that unit. It wasn't |
|
|
1574
|
Wed Aug 19 13:53:45 2015 |
Aidan | Summary | DAQ | DAC calibration for Acromag slow units | Volts (requested) to Counts
C = a1*V_req + a2
a1 = 3003.5 counts/Volt |
|
|
1585
|
Thu Oct 8 16:27:18 2015 |
Aidan | Summary | NoiseBudget | Noise Budget on MATLAB - RIN is possibly the reason locking sucks right now | After two straight days of trying to get
iPython notebooks to run on my Mac and two
different Ubuntu installations, I gave up |
|
|
1591
|
Thu Oct 15 10:09:16 2015 |
Aidan | Summary | Computers | Updated network diagram on Wiki | https://nodus.ligo.caltech.edu:30889/ATFWiki/doku.php?id=main:resources:computing:network:menu
Removed a few old computers from
the diagram (35W laser, old OPC server, PSL |
|
|
1597
|
Mon Oct 26 13:47:18 2015 |
Aidan | Summary | RefCav | Thermal shield cap drawing - lower emissivity material | https://dcc.ligo.org/DocDB/0120/D1500213/001/D1500213-v1.PDF |
|
|
1598
|
Mon Oct 26 17:24:59 2015 |
Aidan | Summary | RefCav | Thermal shield cap drawing - lower emissivity material | Here's the drawing for the shield. https://dcc.ligo.org/LIGO-D1500403
|
|
|
1610
|
Fri Mar 4 17:27:48 2016 |
Aidan | Summary | Environment | Table and enclosure raising | We have raised the table by ~ 16"
and the enclosure around the table by about
13". |
|
|
1618
|
Wed Mar 30 10:22:59 2016 |
Aidan | Summary | DAQ | New front panel for Acromag slow controls ordered | I've ordered a 4U rack mount kit with
DIN rail for mounting the Acromag stuff.
It's open on the top and bottom but is |
|
|
1628
|
Sat Apr 9 12:30:15 2016 |
Aidan | Summary | DAQ | DAC back online for laser SLOW control: now via Acromag | With the (intentional) demise of the VME
crate, the slow controls for the laser were
brought back online today. So far, only the |
|
|
1629
|
Sat Apr 9 12:30:20 2016 |
Aidan | Summary | DAQ | DAC back online for laser SLOW control: now via Acromag | With the (intentional) demise of the VME
crate, the slow controls for the laser were
brought back online today. So far, only the |
|
|
1634
|
Mon May 30 14:27:48 2016 |
Aidan | Summary | Safety | Gave Andrew Wade a safety walkthrough | I showed Andrew Wade the CTN lab and gave
him a safety walkthrough. We also went over
the safe operating procedure for turning |
|
|
1636
|
Tue May 31 13:26:21 2016 |
Aidan | Summary | RF | 36MHz and 37MHz Wenzel crystals added to the lab for PDH | I have a set of two Wenzel OCXO added to
the electronics chassis, courtesy of the
gentry from the Cryo Lab. The chassis has |
|
|
1700
|
Thu Aug 4 15:15:32 2016 |
Aidan | Summary | TempCtrl | RTDs used in aLIGO TCS RHs | These are the RTDs we use in aLIGO TCS
http://www.omega.com/Temperature/pdf/1PT100KN_2PT100KN.pdf
|
|
|
1710
|
Tue Aug 30 10:28:07 2016 |
Aidan | Misc | TempCtrl | Kapton stick on resistive heaters |
I've ordered a few of these Kapton heaters
to fit the new shields: https://dcc.ligo.org/DocDB/0122/D1500403/002/D1500403-v2.PDF
|
|
|
1711
|
Tue Aug 30 10:56:51 2016 |
Aidan | Summary | TempCtrl | RTDs used in aLIGO TCS RHs | Here's the RH driver PCB for aLIGO:
https://dcc.ligo.org/DocDB/0021/D1002529/006/Driver_RingHeater.pdf
It uses this power amp: https://www.digchip.com/datasheets/download_datasheet.php?id=508953&part-number=LM12CLK |
|
|
1716
|
Tue Sep 6 15:24:52 2016 |
Aidan | Summary | Environment | PEM monitor computer is ready to run - needs license | I'm working with Jamie to get a frame builder
running in the ATF & CTN for these temp/pres/humidity
channels to be stored on. There's no
|
|
|
1801
|
Wed Jan 4 16:21:52 2017 |
Aidan | Notes | PMC | CTN PMC COMSOL lowest body-mode 13.9kHz & UGF = 3.5kHz calculation | I modeled the PMC in COMSOL. The lowest
order body mode is around 13.9kHz. This means
we want a UGF for the PMC control loop around |
|
|
1811
|
Wed Jan 11 17:08:45 2017 |
Aidan | Summary | Purchases | Controllable 30V, 3A, 90W linear power supply with analog input | I picked up one of the following linear lab
power supplies for the TCS Lab. They can
output 30V, 3A. They also have accept an |
|
|
1837
|
Wed May 24 14:58:45 2017 |
Aidan | Summary | PMC | PMC driver board chassis and Acromag | I've pulled the old PMC driver board
from the VIM crate architecture and inserted
it into a chassis (D1700003). The interface |
|
|
1920
|
Fri Sep 15 14:33:06 2017 |
Aidan | Summary | Other | CTN lab preparation for the plumbing work | [Aidan, Gabriele, Eric]
We turned off and covered the clean flow
bench by the west wall. We also removed the |
7x |
|
1656
|
Fri Jul 1 16:50:35 2016 |
Aidan, Andrew | Summary | DAQ | Acromag slow controls back up | I showed Andrew how to set up the slow
controls. We got the previous 3 ADC channels
back up. |
|
|
1557
|
Thu Jul 30 14:55:14 2015 |
Aidan, Antonio | Summary | Environment | Broken light replaced - general lab cleanliness | I had Facilities come and replace the dead
light tube in the CTN lab antechamber. It's
nice and bright in there right now. |
|
|
1558
|
Sat Aug 1 09:24:58 2015 |
Aidan, Antonio | Summary | BEAT | Lasers locked to cavities - no beat - polarization? Transmission issues | Both lasers have been locked to the cavities
for 24 hours. The slow control of the frequency
is handed off to the PID loop. Antonio and |
|
|
1562
|
Tue Aug 4 17:41:01 2015 |
Aidan, Antonio | Summary | RefCav | DAQ running with TRANS channels - strange peaks as we scan the laser frequency | We now have DC transmission channels in
the frames. I'll post the details soon,
but here's a plot that shows the transmission |
|
|
1565
|
Wed Aug 5 15:59:07 2015 |
Aidan, Antonio | Summary | RefCav | ACAV transmission on RF photodiode | We swept the temperature of the ACAV laser
and monitored the transmission through the
cavity. In the attached image, the TEM00 |
|
|
1577
|
Thu Aug 27 17:11:43 2015 |
Aidan, Antonio | Summary | BEAT | Trouble locking - 140kHz notes are switching supplies? | We tried locking the PLL today but failed.
Looking at the beat note on the network analyzer
revealed some 70/140kHz harmonics. We thought |
|
|
1583
|
Tue Oct 6 09:11:48 2015 |
Aidan, Antonio | DailyProgress | PEM | It's alive! Newport temperature sensors resurrected | We finally got the temperature sensors
broadcasting to EPICS channels again - well,
in part anyway. There are a lot of configuration |
|