| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
351
|
Thu Sep 9 23:03:40 2010 |
tara | Summary | RefCav | reduced back reflection | After PBS is rotated
to the right position (yesterday I made a
mistake by minimizing the split beam. |
|
|
350
|
Thu Sep 9 20:55:22 2010 |
tara | Notes | BEAT | calibration V->Hz for IFR2023B | the calibration value is 71.3 kHz/Volt
for the following setup
center freq = 159.294 MHz |
|
|
349
|
Thu Sep 9 19:28:23 2010 |
tara | Notes | Safety | laser turned off | I turned off the laser for people who will
work on sprinkler in the lab tomorrow. The
warning light is off. |
|
|
348
|
Thu Sep 9 02:20:32 2010 |
tara | Notes | | problem about PBS/QWP | We have used an instant PBS/QWP which is
a PBS optically contacted to an aligned QWP
in front of a reference cavity |
|
|
347
|
Thu Sep 9 02:20:32 2010 |
tara | Notes | | problem about PBS/QWP | We have used an instant PBS/QWP which is
a PBS optically contacted to an aligned QWP
in front of a reference cavity |
|
|
346
|
Wed Sep 8 19:29:01 2010 |
Frank | Notes | DAQ | funny EPICS channel problems | i have several channels, e.g "C3:PSL-RCAV_RCPID_SETPOINT",
loaded on the VME system as software channels. |
|
|
345
|
Wed Sep 8 19:10:53 2010 |
Frank | DailyProgress | Laser | PBS/QWP-combination very bad | after a lot of test it turned out that
the optically contacted QWP/PBS combinations
used for the reference cavity so far are |
|
|
344
|
Wed Sep 8 00:17:41 2010 |
tara | Notes | Laser | Debugging Laser Sta | Today I investigated which optics
reflect most power back to the PMC and the
laser. |
|
|
343
|
Sun Sep 5 20:54:11 2010 |
tara | Notes | NoiseBudget | RIN from PMC and RCAV | SInce the Faraday isolator alter
the beam path and beam profile a bit. The
mode matching efficiency drops. |
|
|
342
|
Sun Sep 5 19:41:45 2010 |
tara | DailyProgress | | Faraday Isolator added | Frank showed me that the RIN level
from PMC is too high and caused by back reflection.
PMC's psd is reduced by blocking |
|
|
341
|
Fri Sep 3 01:45:54 2010 |
tara | Summary | Laser | RIN comparison between PMC and RCAV | When both cavities are locked, I
measured
1) power fluctuation behind ACAV |
|
|
340
|
Thu Sep 2 20:31:01 2010 |
tara | Notes | Computers | medm screens are frozen | 50 mins ago, medm on Sun machine is frozen,
most channels are inactive (except
ACAV_HEATER, and it goes up to 7 which is |
|
|
339
|
Thu Sep 2 18:54:10 2010 |
tara | Notes | Computers | ACAV,RCAV's pds connected to DAQ |
ACAV's PD for transmitted beam is
connected to PSL1 |
|
|
338
|
Thu Sep 2 17:11:39 2010 |
tara | Notes | RefCav | both cavites locked | ACAV_TEMPAVG still adjusting it self to
37.2 (SETPT) three overshoots in the
last 8 hrs (+/-0.01 C) |
|
|
337
|
Wed Sep 1 15:22:39 2010 |
tara | Notes | RefCav | current parameters for cavities | Temperature on both cavities
are fairly constant over -8 hrs, still can't
simultaneously lock both cavities. |
|
|
336
|
Wed Sep 1 00:27:34 2010 |
tara | Notes | BEAT | symmetric optic layout for beat measurement | A tentative layout for almost symmetric
layout for beat measurement. The double 1/4
objects in the beam paths should be |
|
|
335
|
Tue Aug 31 21:59:19 2010 |
Frank | Summary | Computers | still network problems | i tried to figure out where the network
problems come from. Looks like it's the fiber
connection between fb1 and the switch in |
|
|
334
|
Tue Aug 31 21:37:11 2010 |
Frank | Notes | RefCav | changed acav setpt back to 37.3 |
|
|
|
333
|
Tue Aug 31 18:33:13 2010 |
Frank | Notes | RefCav | changed acav setpt back to 37.3 | don't change anything until it is stable
and you thought about it carefully. The system
was totally out of control, check the dataviewer!. |
|
|
332
|
Tue Aug 31 18:20:42 2010 |
tara | Notes | RefCav | change acav setpt | I adjust SLOWDC to see what value to lock
each cavity.
For ACAV I adjust SLOWDC so that |
|
|
331
|
Tue Aug 31 16:42:04 2010 |
tara | Notes | DAQ | C3:PSL-ACAV_RCTRANSPD broken? |
|
|
|
330
|
Tue Aug 31 16:15:51 2010 |
tara | Notes | Computers | dead channel, C3:PSL-ACAV_TEMPAVG |
|
|
|
329
|
Tue Aug 31 16:04:30 2010 |
tara | Notes | DAQ | C3:PSL-ACAV_RCTRANSPD broken? |
|
|
|
328
|
Tue Aug 31 15:52:43 2010 |
Frank | Notes | DAQ | C3:PSL-ACAV_RCTRANSPD broken? | was it grey? If yes the cable already connected
to the T is the cable going to the DAQ. That's
why there is a T already. Don't disconnect |
|
|
327
|
Tue Aug 31 15:46:13 2010 |
tara | Notes | DAQ | C3:PSL-ACAV_RCTRANSPD broken? |
|
|
|
326
|
Tue Aug 31 15:15:44 2010 |
Frank | Notes | DAQ | how to measure ACAV channels without RCAV locked | if you wanna measure anything in the ACAV
loop without the RCAV locked, don't forget
to DISABLE |
|
|
325
|
Tue Aug 31 15:11:28 2010 |
Frank | Notes | DAQ | C3:PSL-ACAV_RCTRANSPD broken? | can you plz check this channel as it is
constantly at -14.4797 since yesterday. Did
you disconnect it? If yes, plz elog those |
|
|
324
|
Tue Aug 31 15:04:51 2010 |
Frank | Notes | Computers | dead channel, C3:PSL-ACAV_TEMPAVG | be carefull with the data you are taking
right now. it's wrong for your projection
as the power fluctuations are different when |
|
|
323
|
Tue Aug 31 14:52:41 2010 |
Frank | Notes | Computers | dead channel, C3:PSL-ACAV_TEMPAVG | made the changes a minute ago. simply reboot
after changing the values in the startup.cmd
(those i didn't change) |
|
|
322
|
Tue Aug 31 14:50:53 2010 |
tara | Notes | Computers | dead channel, C3:PSL-ACAV_TEMPAVG |
|
|
|
321
|
Tue Aug 31 13:40:00 2010 |
Frank | Notes | Computers | dead channel, C3:PSL-ACAV_TEMPAVG | looks like some fault of the database.
/usr1/epics/psl/db/acav.db does not contain
the correct entry. check rcav.db and copy |
|
|
320
|
Tue Aug 31 13:33:02 2010 |
tara | Notes | Computers | dead channel, C3:PSL-ACAV_TEMPAVG | Yesterday, I reset the PSL crate behind
the SUN computer, but the channel C3:PSL-ACAV_TEMPAVG
is stil inactive. |
|
|
319
|
Tue Aug 31 13:26:32 2010 |
Frank | Notes | Environment | antack (ants attack) | any results from the poison from 40m they
tried in the TCS lab? Did it work?If yes
we should get some for the other labs too.... |
|
|
318
|
Mon Aug 30 23:47:30 2010 |
tara | Notes | Environment | antack (ants attack) | I think ants are now building their
colony in the lab, even though there is no
garbage, they can find some food around here. |
|
|
317
|
Mon Aug 30 23:25:06 2010 |
tara | Summary | RefCav | RIN comparison between PMC and RCAV | I
measured RIN from beam behind PMC and RCAV. Photodiodes are |
|
|
316
|
Mon Aug 30 22:16:51 2010 |
Frank | Notes | Computers | note for resetting psl crate | set temp for the ACAV should be 37.3, that
was the value since about a week. see here
: http://131.215.115.52:8080/PSL_Lab/307 |
|
|
315
|
Mon Aug 30 20:11:51 2010 |
tara | Notes | Computers | note for resetting psl crate | C3:PSL-ACAV_TEMPAVG that tells the
average temperature from ACAV is dead. Frank
told me to reboot the PSL crate. |
|
|
314
|
Mon Aug 30 11:30:22 2010 |
tara | Notes | Computers | medm screens are frozen | I was measuring the power fluctuation behind
PMC and RCAV, during that the beam was not
locked and the medm screens were frozen, |
|
|
313
|
Fri Aug 27 20:08:56 2010 |
tarac | Notes | NoiseBudget | COMSOL | I use COMSOL to simulate the
temperature distribution inside the mirror.
The mirrors are separate into 3 regions |
|
|
312
|
Fri Aug 27 19:02:24 2010 |
Frank | Notes | Computers | DAQ | plz change the channel names. Those names
are bullshit...
|
|
|
311
|
Fri Aug 27 18:49:43 2010 |
tara | Notes | BEAT | both cavities relocked |
rebooted the crate.
|
|
|
310
|
Fri Aug 27 18:39:23 2010 |
tara | Notes | Computers | DAQ | Dmass helps me initializing two channels
for DAQ.
PSL1 connected to channel 28 which |
|
|
309
|
Thu Aug 26 23:18:12 2010 |
Frank | Notes | BEAT | both cavities relocked | relocked both cavities. The second crate
containing the output card to control the
ACAV power supply stopped working and i can't |
|
|
308
|
Thu Aug 26 23:00:35 2010 |
Frank | Notes | BEAT | lock-loss of both cavities | i lost lock of both cavities for some unknown
reason. Also the crate seemed to stop working
as some channels are dead now... |
|
|
307
|
Thu Aug 26 19:58:06 2010 |
Frank | Notes | BEAT | changed ACAV setpoint temperature - both cavities locked | changed the ACAV temp to 37.3 degrees.
Both cavities are locked now.
I'll monitor the VCO input signal |
|
|
306
|
Mon Aug 23 21:50:47 2010 |
Frank | Notes | RefCav | changed ACAV setpoint temperature | changed setpoint for ACAV to 37.2 degrees,
disabled the FSS loop and enabled feedback
to laser temp using VCO input signal (C3:PSL-ACAV_VCOMON) |
|
|
305
|
Fri Aug 20 21:03:16 2010 |
Frank | Summary | DAQ | channel list for fb1 updated and framebuilder restarted | i updated the database for epics channels
for the PSL lab and restarted the framebuilder
on fb1. |
|
|
304
|
Fri Aug 20 18:59:40 2010 |
Megan | Photos | Environment | Temperature Stabilization? | To test the temperature stability of our
cavities, Frank and I decided to run the
heat gun at 800 degrees Fahrenheit for a |
|
|
303
|
Fri Aug 20 00:54:48 2010 |
Frank | Summary | DAQ | PSL RT fronend code shut down | i've killed the PSL RT frontend. Everything
else should be ok, so plz check if everything
is working. |
|
|
302
|
Fri Aug 20 00:14:09 2010 |
Frank | Summary | DAQ | changes at VCO connecting block at x-connect | i replaced some cables going from the 9-pin
D-SUB connection block connecting the VCO
with the DAQ by bi-colored, twisted ones. |
|