| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8759
|
Wed Jun 26 21:52:55 2013 |
Charles | Update | ISS | CTN Servo Prototype Characterization | Following the circuit
design in elog 8748, I constructed
a prototype for the servo portion of the |
|
|
8771
|
Thu Jun 27 18:24:25 2013 |
Charles | Update | ISS | CTN Servo Prototype Characterization - Done Correctly | As I showed in [elog
8759], measuring the transfer function
of my prototype servo was difficult due to |
|
|
8786
|
Fri Jun 28 16:19:06 2013 |
Charles | Update | ISS | 40m Noise Budget - Seismic Contribution | I'm working on developing a full
noise budget for the 40m. To that end, I'll
use measurements from the GUR1 seismometer |
|
|
8791
|
Tue Jul 2 12:59:46 2013 |
Charles | Update | ISS | General Design for ISS Applicable to Multiple Applications | While attempting to develop a somewhat
accurate noise budget for the 40m, I reasoned
that while the shape of the transfer function |
6x |
|
8799
|
Wed Jul 3 20:51:43 2013 |
Charles | Update | ISS | Proposed ISS for CTN Experiment - Altium Schematic | After familiarizing myself with Altium,
I drew up the attached schematic for the
ISS to be used in the CTN experiment. The |
|
|
8830
|
Thu Jul 11 13:52:51 2013 |
Charles | Update | ISS | RMS threshold detection and triggering | There are essentially two major portions
of the ISS I am designing. One system has
the voltage reference, differential amplifier |
|
|
8836
|
Fri Jul 12 12:51:13 2013 |
Charles | Update | ISS | RMS Noise from PMC Transmission | I went out on the floor to look at the
transmitted signal from the PMC to get a
rough idea of the noise of the unstabilized |
|
|
8838
|
Fri Jul 12 13:15:43 2013 |
Koji | Update | ISS | RMS Noise from PMC Transmission | It would be better to measure the power
spectrum density of the fluctuation.
The RMS does not tell enough information |
|
|
8839
|
Fri Jul 12 18:30:20 2013 |
Charles | Update | ISS | RMS Noise from PMC Transmission |
|
|
|
8876
|
Thu Jul 18 21:45:36 2013 |
Charles | Update | ISS | ISS - Full Schematic | Here I have included the full schematic
(so far) of the proposed ISS. There are two
sheets: the first schematic details the filter |
|
|
8920
|
Wed Jul 24 22:58:03 2013 |
Charles | Update | ISS | ISS - Full Schematic - Updated | I have made significant changes to
the ISS schematic, mostly in the form of
adding necessary subsystems. |
|
|
8922
|
Thu Jul 25 12:53:45 2013 |
Charles | Update | ISS | Comparator + Triggering Prototype | I realized I totally forgot to post
this last week, but I prototyped the comparator
and boost triggering portion of the ISS, |
|
|
8927
|
Fri Jul 26 14:39:08 2013 |
Charles | Update | ISS | Power Regulation for ISS Board | I constructed a regulator board that can
take |
|
|
8928
|
Fri Jul 26 22:19:24 2013 |
Charles | Update | ISS | ISS - Full Schematic - Updated |
|
|
|
8959
|
Thu Aug 1 22:58:45 2013 |
Charles | Update | ISS | CTN Servo - Explicit Requirement and Proposed Servo | In PSL
elog 1270, Evan elucidated the explicit
requirements for the CTN ISS board. Essentially, |
|
|
8961
|
Fri Aug 2 21:59:36 2013 |
Charles | Update | ISS | Finalized ISS Schematic (hopefully) | Attached is the finalized schematic. The
general circuit topology should remain the
same from this point forward, although individual |
|
|
8964
|
Mon Aug 5 11:53:45 2013 |
Evan | Update | ISS | CTN Servo - Explicit Requirement and Proposed Servo | I goofed on the transfer function requirement
by not giving you the plant transfer function,
which looks to be about 0.014 V/V, independent |
|
|
9016
|
Thu Aug 15 21:42:53 2013 |
Charles | Update | ISS | ISS - Schematic + PCB Layout | After many, many moons of getting
to know exactly how frustrating Altium can
be, I have completed the PCB layout for my |
|
|
9328
|
Fri Nov 1 18:59:41 2013 |
Evan | Configuration | ISS | AOM cabling | [Rana, Nic, Evan]
We did some work today on getting
the AOM back up and running so that we can |
|
|
9331
|
Sat Nov 2 22:49:44 2013 |
Charles | Update | ISS | CTN ISS Noise Suppression Requirement - Updated 10/27 | Previously in elog
8959, I gave a very simple method for
determining the noise suppression behavior |
7x |
|
9332
|
Sun Nov 3 00:05:52 2013 |
Charles | Summary | ISS | ISS Update - Bout' time | Right near the end of summer, I had an
ISS board that was nominally working, but
had a few problems I couldn't really sort |
|
|
9376
|
Wed Nov 13 18:32:04 2013 |
Nic, Evan | Update | ISS | SR560 ISS loop | We have implemented an SR560-based ISS
loop using the AOM on the PSL table. This
is a continuation of the work in |
|
|
9379
|
Wed Nov 13 19:41:55 2013 |
Jenne | Update | ISS | ISS AOM | AOM driving from DAC:
I found that the DAC channels for
TT3 and TT4 are connected up in the simulink |
|
|
9380
|
Wed Nov 13 20:02:12 2013 |
Nic, Evan | Update | ISS | SR560 ISS loop |
|
|
|
9392
|
Fri Nov 15 10:31:45 2013 |
Steve | Update | ISS | SR560 ISS loop connection |
|
|
|
9929
|
Thu May 8 02:03:51 2014 |
rana | Update | ISS | ISS: fuse was blown, repaired, loop back on | Back in November, Nic and Evan turned on
an SR560 based ISS. It uses the PMC TRANS
PD as the error signal and makes an AC coupled |
|
|
69
|
Tue Nov 6 15:36:03 2007 |
rob | Update | LSC | XARM locked | Easily, after resetting the PSL Uniblitz shutters.
There's no entry from David or Andrey about
the recovery from last week's power outage, |
|
|
240
|
Wed Jan 16 14:06:24 2008 |
rob | Update | LSC | monday's locking | rob, tobin, johnnie
We did some locking work monday night, with |
|
|
241
|
Wed Jan 16 14:09:45 2008 |
rob | Update | LSC | tuesday's locking |
I got a little further with the locking (PRFPMI)
last night, after discovering that the cable |
|
|
244
|
Thu Jan 17 14:13:20 2008 |
rob | Update | LSC | Wednesday's locking | Incremental progress on locking yet again.
This time the handoff of DARM to the OMC
worked, and progress halted at handing off |
|
|
249
|
Fri Jan 18 15:31:47 2008 |
rob | Update | LSC | Thursday's locking |
[I]rob, johnnie, andrey[/I]
|
|
|
252
|
Tue Jan 22 02:33:45 2008 |
rob | Update | LSC | DRMI work |
0) The ETMY oplev needs work/centering
|
|
|
272
|
Sat Jan 26 02:08:53 2008 |
John | Omnistructure | LSC | Fibres | There is now a fibre running from the SP table
to the ISCT at the Y-end. In the coming days
I will try to mode match the beam from this |
|
|
296
|
Mon Feb 4 22:01:57 2008 |
John | Summary | LSC | Fibres auxiliary locking - Fibers | I managed to couple ~75% of the light transmitted
from the y arm, through the fibre, back to
the SP table. I hoped that this would be |
|
|
315
|
Wed Feb 13 20:37:11 2008 |
John | Update | LSC | Fibre locking - Fiber | Sam and I observed fringes in the light reflected
from the Y arm. These fringes are due to
the sidebands and not the carrier. To improve |
|
|
342
|
Wed Feb 27 22:05:03 2008 |
John | Update | LSC | Auxiliary locking | A summary of the status of the auxiliary arm
locking effort.
|
|
|
348
|
Fri Feb 29 13:51:17 2008 |
John | Summary | LSC | PD6 response | I checked the response of PD6 using the AM
laser. It looks happy enough.[IMG]elog:348/1[/IMG]
|
|
|
349
|
Sun Mar 2 23:43:45 2008 |
rana | HowTo | LSC | PD6 response | John's PD plotting script is superior to all
of the ones we had before; lets make him
post the script so we can all use it.
|
|
|
360
|
Wed Mar 5 12:51:48 2008 |
John | Summary | LSC | Initial Ligo Arm finesse versus lambda | I've taken the coating recipes for the initial
ligo arm cavity from Rana's web page (ligo.caltech/edu/~rana/mat/)
and plotted the finesse as a function of |
|
|
367
|
Mon Mar 10 20:46:41 2008 |
John | Configuration | LSC | ETMY Trans PD & QPD | I've placed a 10% reflector in the path from
ETMY to the trans and quadrant photodiodes. |
|
|
373
|
Thu Mar 13 02:52:06 2008 |
Lisa | Configuration | LSC | Locking with 3f | Today we have tried to use the reflected signal
demodulated at 3*f1 ~ 99 MHz ([COLOR=chocolate][B]REFL31[/B][/COLOR])
for length control.
|
|
|
381
|
Fri Mar 14 15:52:07 2008 |
rob | Configuration | LSC | LSC code change |
I've edited the LSC code to send different
signals to the ASS box. Now, instead of |
|
|
386
|
Thu Mar 20 16:06:27 2008 |
rob | Configuration | LSC | LSC code change |
I changed the LSC code again. I noticed
that when turning off the LSC (e.g., going |
|
|
396
|
Sun Mar 23 00:56:42 2008 |
John | Update | LSC | More on 3f | We ended our last attempt at 3f locking concerned
about the beam size on PD6. I investigated
tonight. The beam was not obviously overfilling |
|
|
407
|
Mon Mar 31 14:01:40 2008 |
jamie | Summary | LSC | Summary of DC readout PD non-linearity measurements | From March 21-26, I conducted some measurements
of the response non-linearity of some mock-up
DC readout photodetectors. The detectors |
|
|
429
|
Sun Apr 20 18:23:27 2008 |
rana | Summary | LSC | locking attempts | I noticed that the adaptive FF for the MC
had stopped doing anything; this turned out
|
|
|
466
|
Tue May 6 17:28:39 2008 |
rob | Configuration | LSC | AP33 -> POX33 |
I am in the process of switching the POX166
and AP33 photodetectors, so that they become |
|
|
467
|
Wed May 7 15:25:41 2008 |
rob | Configuration | LSC | AP33 -> POX33 | [quote]
I am in the process of switching the POX166
and AP33 photodetectors, so that they become |
|
|
468
|
Thu May 8 01:07:24 2008 |
rana | Summary | LSC | Frequency Noise test: MC Trans Backscatter | [COLOR=purple][SIZE=4][FONT=Arial]There is
a wandering hump in the MC_F spectrum.[/FONT][/SIZE][/COLOR]
It can move around on the time
|
|
|
557
|
Tue Jun 24 15:15:09 2008 |
John | Summary | LSC | Locking efforts | Rob, Rana, John
In the past week or so we've been working |
|