| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
331
|
Fri Mar 10 16:44:13 2017 |
Gabriele | Optics | Daily Progress | Updated in vacuum periscope of CR0 | This afternoon I removed the old periscope
from CR0 and installed a new one with finely
adjustable mount, like those in the new chamber. |
|
|
330
|
Tue Mar 7 11:09:33 2017 |
Gabriele | General | Measurements | New MIT sample #3 | 2017-03-07
11:08am,
in chamber CR0
11:09am, roughing
pump on
11:23am turbo pump on
3:37pm, |
|
|
329
|
Tue Mar 7 11:01:58 2017 |
Gabriele | General | Measurements | S1600469 S1600471 S1600481 S1600483 | 2017-03-07
10:57am,
in chamber
S1600469 in CR1
S1600471
in CR2
S1600481 in CR3
S1600483 |
|
|
328
|
Fri Mar 3 13:01:59 2017 |
Gabriele | General | Measurements | New MIT sample #2 | 2017-03-03
1:00pm,
in chamber, realigned optical lever to get
as close as possible to the edge of the disk
1:02pm, |
|
|
327
|
Fri Mar 3 13:00:50 2017 |
Gabriele | General | Measurements | S1600453 S1600490 | 2017-03-03
12:45pm,
in chamber
S1600453 in CR3
S1600490
in CR4
12:45pm |
|
|
326
|
Thu Mar 2 11:27:47 2017 |
Gabriele | General | Noise hunting | Turbo pump of CR0 pollutes CR1 | The turbo pump of the CR0 chamber runs
at 833 Hz. It causes vibrations that pollute
the measurements in the CR1-4 chamber. In |
|
|
325
|
Thu Mar 2 09:45:58 2017 |
Gabriele | General | Measurements | S1600456 S1600458 S1600461 S1600491 | 2017-03-02
9:31am,
in chamber, removed ND from path 2-4
S1600456
in CR1
S1600458 in CR2
S1600461 |
|
|
324
|
Wed Mar 1 10:10:47 2017 |
Gabriele | General | Measurements | S1600469 S1600471 S1600481 S1600483 | 2017-03-01
10:10am,
in chamber, added neutral densities
S1600469
in CR1
S1600471 in CR2
S1600481 |
|
|
323
|
Tue Feb 28 14:20:50 2017 |
Gabriele | General | Measurements | New MIT sample #1 | 2017-02-28
2:19pm,
installed in CR0, balanced, with 1/2"
inserts facing down
It looks |
|
|
322
|
Tue Feb 28 11:22:35 2017 |
Gabriele | General | Measurements | S1600463 S1600466 S1600475 S1600476 | 2017-02-28
11:20am,
in chamber
S1600463 in CR1
S1600466
in CR2
S1600475 in CR3
S1600476 |
|
|
321
|
Mon Feb 27 13:13:05 2017 |
Gabriele | General | Measurements | S1600490 | 2017-02-27
12:59pm,
installed in chamber CR0, balanced
1:00pm,
roughing pump on
1:13pm, turbo |
|
|
320
|
Mon Feb 27 08:42:05 2017 |
Gabriele | General | Measurements | S1600453 S1600490 | 2017-02-27
8:40am,
in chamber, balanced
S1600453
in CR1
S1600491 in CR2 (i meant |
|
|
319
|
Fri Feb 24 14:44:22 2017 |
Gabriele | General | General | Disk model | It's possible to build an analytical
model of the resonant frequencies of a simple
thin disk. For example, see J. Sound |
|
|
318
|
Fri Feb 24 13:21:03 2017 |
Gabriele | General | Measurements | Q of substrates with polished edges | Below the measured Q values of the six
Suprasil 313 substrates, with polished edges,
after annealing at 900 degrees C for 9 hours. |
8x |
|
317
|
Fri Feb 24 11:05:58 2017 |
Gabriele | General | Measurements | S1600456 S1600458 S1600461 S1600491 | 2017-02-24
10:50am,
in chamber, balanced, added neutral density
to laser on the 1/3 path
S1600456 |
|
|
316
|
Thu Feb 23 10:54:41 2017 |
Gabriele | General | Measurements | S1600523 S1600524 | 2017-02-23
10:35am
in chamber, balanced
S1600523
in bay 1
S1600524 in bay 2
10:45am, |
|
|
315
|
Wed Feb 22 15:11:59 2017 |
Gabriele | General | Measurements | S1600519 S1600520 S1600521 S1600522 | 2017-02-22
2:59pm,
in chamber, balanced, removed all neutral
densities
3:02pm, roughing pump |
|
|
314
|
Wed Feb 22 13:56:15 2017 |
Gabriele | Electronics | Configuration | Software improvements |
created a single interface to move
the picomotors in front of QPD1 ... QPD4
the
command qpdcenter |
|
|
313
|
Sun Feb 19 11:46:26 2017 |
Gabriele | General | Measurements | S1600458 S1600474 S1600491 | 2017-02-19
11:28am
an chamber:
S1600458 in CR1
S1600474
in CR2
S1600491 in CR3
empty |
|
|
312
|
Sat Feb 18 15:04:00 2017 |
Gabriele | General | Measurements | S1600481 S1600483 S1600469 S1600471 | 2017-02-18
9:54am in
chamber, balanced
S1600469
in CR1
S1600471 |
|
|
311
|
Fri Feb 17 13:44:47 2017 |
Gabriele | Optics | Daily Progress | Swapped picomotor and re-alignment | Since I had recurrent problems with the
picomotors used for QPD3, I swapped them
with another Newport motorized mirror that |
|
|
310
|
Thu Feb 16 10:19:33 2017 |
Gabriele | General | Measurements | S1600453 S1600456 S1600461 S1600490 | 2017-02-16
10:17am
in chamber
S1600453 in CR1
S1600456
in CR2
S1600461 in CR3
S1600490 |
|
|
309
|
Thu Feb 16 10:07:59 2017 |
Gabriele | General | Measurements | S1600491 | 2017-02-16
10:06am,
in chamber CR0, balanced
10:07am,
roughing pump on
10:31am, turbo |
|
|
308
|
Thu Feb 16 09:47:29 2017 |
Gabriele | General | Measurements | Summary of coating runs carried out at Montreal |
Substrate |
|
|
307
|
Tue Feb 14 15:50:23 2017 |
Gabriele | General | Measurements | S1600519 S1600520 S1600521 S1600522 | New substrates from Mark Optics, round,
with polished edges
2017-02-14
3:35pm |
|
|
306
|
Tue Feb 14 14:47:00 2017 |
Gabriele | General | Measurements | S1600495 | 2017-02-14
2:32pm,
in chamber (CR0), balanced
2:33pm
roughing pump on
2:45pm, turbo |
|
|
305
|
Tue Feb 14 10:55:13 2017 |
Gabriele | General | Daily Progress | Something fishy with bay 4 of the new setup | I did two set of measurements with the
new coated samples from Montreal. I reshuffled
the position in the two measurements. In |
|
|
304
|
Sat Feb 11 16:22:26 2017 |
Gabriele | Mechanics | Daily Progress | Translation stage to move retaining rings | The ring motion up and down was not very
smooth, again due to friction on the centering
pins. |
|
|
303
|
Fri Feb 10 17:16:28 2017 |
Gabriele | Mechanics | Daily Progress | Translation stage to move retaining rings | This afternoon I installed the picomotor
and the translation stage that will be used
to move the retaining rings up and down. |
|
|
302
|
Thu Feb 9 14:49:51 2017 |
Gabriele | General | Measurements | S1600489 S1600490 S1600491 S1600492 | 2017-02-09
2:30pm,
samples installed in the chamber:
S1600489 in bay 1
|
|
|
301
|
Thu Feb 9 11:35:27 2017 |
Gabriele | Optics | Configuration | QPD calibration | This morning I measured the beam profiles
at the QPD positions. As expected, the beams
are not gaussian there, since we are seeing |
11x |
|
300
|
Thu Feb 9 09:30:52 2017 |
Gabriele | Optics | Daily Progress | Two laser installed, setup aligned | The lasers are behaving well, there is
no high noise or wandering lines. The spectrum
below is taken in air: that explains the |
|
|
299
|
Thu Feb 9 09:10:17 2017 |
Gabriele, Larry | Electronics | Configuration | Private network | I reconfigured the powerstrip and the two
Newport controllers to use static IP address
in the new 10.10.10.X network, using the |
|
|
298
|
Thu Feb 9 08:35:24 2017 |
Gabriele | Electronics | Configuration | Removed ESD bias path to model CR0 | Removed, since iit was not useful to improve
the actuation authority.
|
|
|
297
|
Wed Feb 8 17:06:11 2017 |
Gabriele, Larry | Electronics | Configuration | Private network | This morning Larry set up a network switch
to create a local network for the power strip
and the two Newport picomotor controllers. |
|
|
296
|
Wed Feb 8 17:01:01 2017 |
Gabriele | Optics | Daily Progress | Two laser installed, setup aligned | Today I swapped out the 8mW laser
and installed two 2.5 mW lasers. I rebuilt
the input part of the optical levers and |
|
|
295
|
Tue Feb 7 16:16:37 2017 |
Gabriele | Optics | Daily Progress | Lasers | The high power lasers I tested so far (the
Thorlabs 21mW and the JDSU 1125P) are noisy:
they both have wandering lines that from |
|
|
294
|
Tue Feb 7 10:03:35 2017 |
Gabriele | General | Measurements | S1600496 | 2017-02-07
10:02am
in chamber, balanced
10:03am roughing
pump on
10:30am turbo pump on
Excitations |
|
|
293
|
Mon Feb 6 16:22:47 2017 |
Gabriele | General | Measurements | S1600472 S1600478 S1600473 S1600480 |
In the new chamber
Excitations:
Quiet
time before excitation: 1170443490
Excitation (broad band) at 1170443523 |
|
|
292
|
Mon Feb 6 14:09:07 2017 |
Gabriele | General | Measurements | First set of parallel measurements completed | The new laser is still acting up a bit,
with a wandering line moving sometimes inside
the band. Nevertheless, I could perform the |
|
|
291
|
Mon Feb 6 11:19:13 2017 |
Gabriele | Optics | Daily Progress | Laser swap | The Thorlabs laser has been misbehaving
for the whole weekend. Even after many days
being continuosly on, the wandering line |
|
|
290
|
Mon Feb 6 08:37:54 2017 |
Gabriele | General | Measurements | S1600495 | 2017-02-06
8:35am in
chamber, balanced
8:36am roughing
pump on
8:50am tubo pump on
Excitations: |
|
|
289
|
Wed Feb 1 16:58:10 2017 |
Gabriele | General | Characterization | Excitation tests | The excitation is working fine. However,
there is a large cross coupling in the excitation
between channels: so if I switch on only |
|
|
288
|
Wed Feb 1 15:35:30 2017 |
Gabriele | General | Daily Progress | excitation not working - FIXED | My bad, a cable was disconnected.
|
|
|
287
|
Wed Feb 1 15:23:42 2017 |
Gabriele | Optics | Noise hunting | Wandering line is due to the laser | The wandering line I mentioned in my previous
elog, which is spoiling most of the sensitivity,
turns out to be power noise of the laser. |
|
|
286
|
Tue Jan 31 16:55:17 2017 |
Gabriele | General | Daily Progress | Improved autocenter, excitation not working, wandering line | The autocenter script wasn't working
in a very robust way (sometimes the socket
connection to the controller failed, some |
|
|
285
|
Tue Jan 31 16:50:55 2017 |
Gabriele, Alena | General | Vacuum | First pump-down with setup | This afternoon we started the pump-down
with all the system installed into the chamber.
Unfortunately the IGM vacuum gauge isn't |
|
|
284
|
Tue Jan 31 11:21:44 2017 |
Gabriele | Mechanics | Daily Progress | Retaining ring mechanics | All parts for the motion of the retaining
rings have been received and are ok. We're
going to clean and bake them. |
|
|
283
|
Tue Jan 31 09:03:12 2017 |
Gabriele | Electronics | Configuration | Auto centering script for the new setup | I wrote an autocenter script for the four
QPD in the new setup (autocenter14.py) and
renamed the script for the old chamber (autocenter0.py). |
|
|
282
|
Mon Jan 30 15:16:54 2017 |
Gabriele | General | Daily Progress | Four samples in chamber |
checked that the high voltage paths
are working:
the DAC signal
is properly received and amplified by the |
|