| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
639
|
Mon Jul 7 13:49:27 2008 |
Yoichi | HowTo | PSL | MZ offset, gain tips | John, Yoichi
This morning John found that MZ servo is |
|
|
642
|
Mon Jul 7 16:30:08 2008 |
steve | Update | PSL | PSL-PEM 16 days trend | This morning the laser head temp was up to
20.3C because the laser chiller was overflowing.
I removed 700 cc water.
|
|
|
645
|
Tue Jul 8 08:16:56 2008 |
steve | Update | PSL | PMC problem | The PMC is unhappy. PMC auto locker is not
working.
DC output slider adjust has to be moved from |
|
|
648
|
Tue Jul 8 12:25:54 2008 |
John | Summary | PSL | ISS gain set to 2dB | |
|
|
649
|
Tue Jul 8 21:46:38 2008 |
Yoichi | Configuration | PSL | GC650M moved to the PMC transmission | I moved a GC650M, which was monitoring the
light coming out of the PSL, to the transmission
port of the PMC to see the transmitted mode |
|
|
659
|
Fri Jul 11 09:29:02 2008 |
steve | Update | PSL | the PMC still hangs up | Morning alarms:
PMC high voltage is railing, it's auto locker |
|
|
662
|
Sat Jul 12 23:28:31 2008 |
rana | Update | PSL | PMC needs help | As everyone has noticed recently, the PMC
seems to have a PZT problem. It often zooms
|
|
|
663
|
Sun Jul 13 17:19:29 2008 |
rana | Summary | PSL | MOPA SLOWM Calibration | John, Rana
We first unlocked the FSS and ramped the |
|
|
665
|
Mon Jul 14 00:36:19 2008 |
John | Summary | PSL | Slow sweep of laser temp - PMC PZT response | John, Rana
Follow up to # 663
|
|
|
672
|
Tue Jul 15 10:24:57 2008 |
steve | Update | PSL | PMC temp & pzt voltage | The PMC pzt HV was happy with no HEPA temp
stability.
Can we thermally insulate the pmc ? |
|
|
684
|
Wed Jul 16 17:36:51 2008 |
John | DAQ | PSL | FSS input offset | I changed the nominal FSS input offset to
0 from 0.3. Tolerance remains unchanged at
+/-0.05. |
|
|
688
|
Thu Jul 17 08:30:15 2008 |
steve | Update | PSL | PMC relocked manually | The PMC pzt HV and the servo gain adj. are
railing at max this morning
|
|
|
689
|
Thu Jul 17 12:15:21 2008 |
Eric | Update | PSL | Swept PMC PZT voltage range | I unlocked the PMC and swept over C1:PSL-PMC_RAMP's
full range a couple of times this morning.
The PMC should now be relocked and returned |
|
|
692
|
Thu Jul 17 20:13:34 2008 |
Yoichi | Update | PSL | PMC alignment/mode matching effort | I'm working to improve the mode matching of
PMC.
Because I noticed that the beam was hitting |
|
|
699
|
Fri Jul 18 19:41:09 2008 |
Yoichi | Update | PSL | PMC PZT investigation | I measured the HV coming to the PMC PZT by
plugging it off from the PZT and hooking
it up to a DVM.
|
|
|
701
|
Fri Jul 18 23:24:24 2008 |
rob | Update | PSL | PMC PZT investigation | [quote]I measured the HV coming to the PMC
PZT by plugging it off from the PZT and hooking
it up to a DVM.
|
|
|
702
|
Sat Jul 19 19:39:44 2008 |
rob | Update | PSL | PMC PZT investigation | [quote][quote] The 64k is the series resistor
after the PA85, not the modeled resistance
of the PZT itself.[/quote]
|
|
|
703
|
Sat Jul 19 19:41:56 2008 |
Yoichi | AoG | PSL | The author of the entry 702 is Yoichi not Rob | I made a mistake. |
|
|
711
|
Tue Jul 22 03:03:22 2008 |
John, Rob | Update | PSL | FSS open loop transfer function | With the common gain slider maxed out the
unity gain frequency is 58kHz.
|
|
|
712
|
Tue Jul 22 09:24:17 2008 |
steve | Update | PSL | laser power | Laser power reality of 120 days |
|
|
713
|
Tue Jul 22 11:55:22 2008 |
rana | Update | PSL | Note from R. Abbott re: the PMC | an email from Rich:
[CODE]Your PZT is broken.
|
|
|
714
|
Tue Jul 22 13:15:14 2008 |
rob | Update | PSL | Note from R. Abbott re: the PMC | [quote]an email from Rich:
[CODE]Your PZT is broken.
|
|
|
715
|
Tue Jul 22 13:16:09 2008 |
John, Rob | Update | PSL | FSS open loop transfer function | [quote]With the common gain slider maxed out
the unity gain frequency is 58kHz.
|
|
|
719
|
Wed Jul 23 01:42:26 2008 |
rana | Configuration | PSL | FSS RFPD: Examined, "repaired", and re-installed | [U]Rob said that there might be something
wrong with the FSS RFPD since the loop gain
is so low.[/U]
|
|
|
726
|
Wed Jul 23 18:42:18 2008 |
Jenne | Update | PSL | Alignment of AOM | [Rana, Yoichi, Jenne]
Short Version: We are selecting the wrong |
|
|
735
|
Thu Jul 24 19:29:26 2008 |
Yoichi | Configuration | PSL | C1:PSL-STAT_FSS_NOM_C_GAIN is changed from 30 to -0.7 | Koji, Yoichi
Since the light power going to the ref. cavity |
|
|
736
|
Thu Jul 24 21:04:58 2008 |
rana | Update | PSL | FSS | Since Jenne and Yoichi are going to finish
up their refcav/FSS work in the morning I
decided to
|
|
|
741
|
Fri Jul 25 19:57:18 2008 |
Jenne | Update | PSL | Ref Cav & PMC | "PMC is in, but is still being worked on.
Leave it alone." ---Rana
|
|
|
745
|
Sun Jul 27 23:06:17 2008 |
rana | Update | PSL | PMC, MZ, MC-MMT, etc. | With the new PMC now in I aligned the MZ to
the new beam (there is sadly no steering
between the PMC and the MZ).
|
|
|
746
|
Mon Jul 28 11:20:13 2008 |
Jenne | Update | PSL | Work on the FSS and Reference Cavity | [Yoichi, Jenne, Koji]
The Reference Cavity's saga continues....
|
|
|
749
|
Mon Jul 28 17:44:07 2008 |
rana | Update | PSL | PMC PZT v. temperature | This plot shows that the PMC [COLOR=darkblue]PZT
has ~20 Vpp fluctuations on a 24 hour timescale[/COLOR]
which is correlated to the 24 hour temperature |
|
|
751
|
Mon Jul 28 23:41:07 2008 |
rob | Configuration | PSL | FSS/MC gains twiddled |
I found the FSS and MC gain settings in a
weird state. The FSS was showing excess |
|
|
758
|
Tue Jul 29 19:41:38 2008 |
Yoichi | Update | PSL | FSS loop transfer functions | Last night I measured a bunch of transfer
functions on the FSS loop.
All the loop gains were measured with the |
7x |
|
761
|
Tue Jul 29 23:04:34 2008 |
Yoichi | Update | PSL | FSS loop transfer functions | [quote]
The measurement of the PZT open loop TF is
very suspicious. According to this, the PC |
|
|
767
|
Wed Jul 30 13:09:40 2008 |
josephb, Eric | Configuration | PSL | PMC scan experiment | We turned the PSL power down by a factor of
4, blocked one half of the Mach Zehnder and
scanned the PMC by applying a ramp signal |
|
|
772
|
Wed Jul 30 16:35:56 2008 |
Eric | Update | PSL | PMC Scan Graphs | Graphs of the PMC scan data that I got earlier
today.
|
|
|
775
|
Thu Jul 31 10:27:17 2008 |
rana | Update | PSL | PMC Scan Graphs | [quote]Graphs of the PMC scan data that I
got earlier today.
[/quote]
|
|
|
778
|
Fri Aug 1 01:13:32 2008 |
rana | Configuration | PSL | PSL Quad change and new script | Koji and I changed a few optics so that now
~60% of the beam that went to the PSL POS
QPD
|
|
|
781
|
Fri Aug 1 16:33:52 2008 |
rana | Configuration | PSL | PSL Quad change and new script | Here's the sensor ringdown trend from the
kick. |
|
|
791
|
Mon Aug 4 13:43:02 2008 |
Yoichi | Summary | PSL | FSS loop calibration | As a part of the effort to repair the FSS
loop bandwidth, I tried to calibrate the
FSS loop.
|
|
|
873
|
Sat Aug 23 09:39:51 2008 |
rana, jenne | Update | PSL | PMC Survey | Jenne, Rana
We scoped out the PMC situation yesterday. |
|
|
874
|
Mon Aug 25 10:07:35 2008 |
Jenne | Update | PSL | Numbers for the PMC servo board (Re: entry # 873) | Jenne, Rana
These are the numbers that go along with |
|
|
876
|
Mon Aug 25 10:51:06 2008 |
steve | Update | PSL | psl headtemp is coming down | The laser water cooler was overflowing this
morning.
I removed 500 cc water from the chiller.
|
|
|
878
|
Mon Aug 25 12:13:49 2008 |
Jenne | Update | PSL | Broken PMC Servo Board | [SIZE=3]I broke the PMC servo board[/SIZE]
(on accident).
|
|
|
879
|
Mon Aug 25 14:18:36 2008 |
Jenne | Update | PSL | PMC servo board is fixed | The PMC servo board is back in place, all
fixed up with a shiny new resistor. The
PMC locks, and the MC locks (I'm not saying |
|
|
884
|
Tue Aug 26 09:04:59 2008 |
rana | Configuration | PSL | PMC Servo Board: Out for Repairs | I've started modifying our PMC board to bring
it up to the 21st century - [B][COLOR=blue]leave
the screen alone[/COLOR][/B] or else you |
|
|
892
|
Wed Aug 27 13:55:43 2008 |
rana,jenne | Update | PSL | PMC Servo Board | Board is back in. PMC is locked.
Nominal gain is now 15 dB with brick. We |
|
|
893
|
Thu Aug 28 18:56:14 2008 |
rana | Configuration | PSL | beam block distorted | There was a beam block after the Mach Zender.
Who or what put this there?
|
|
|
895
|
Fri Aug 29 02:40:43 2008 |
rana,jenne | Update | PSL | PMC Servo Board | [quote]Board is back in. PMC is locked.
[/quote]
|
|
|
896
|
Fri Aug 29 10:20:32 2008 |
Yoichi | Configuration | PSL | beam block distorted | [quote]There was a beam block after the Mach
Zender. Who or what put this there?
|
|