| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
820
|
Mon Aug 11 00:58:31 2008 |
rana | Update | PEM | 2 years of temperature trend | The PSL RMTEMP alarmed again because it says
the room temperature is 19.5 C. Steve said
in
|
|
|
821
|
Mon Aug 11 09:39:29 2008 |
rana | Update | PEM | 2 years of temperature trend | Steve and I went around and inspected and
then adjusted the thermostats and [FONT=Comic
Sans MS]humidostats[/FONT].
|
|
|
827
|
Tue Aug 12 12:05:36 2008 |
Yoichi | Update | Computers | HP color printer is back | I restarted the HP printer server (a little
box connected to the HP color laser) so that
we can use the HP LaserJet 2550.
|
|
|
829
|
Tue Aug 12 19:48:24 2008 |
Jenne | Update | IOO | PRM standoff is in....mostly | Yoichi, Jenne
The missing PRM standoff is now partially |
|
|
830
|
Tue Aug 12 21:38:19 2008 |
John | Update | LSC | Accidental higher order mode resonances in the arms | Recently we had been having some trouble locking
the full IFO in the [COLOR=green][I][FONT=Verdana]spring[/FONT][/I][/COLOR]
configuration (SRC on [COLOR=blue]+166[/COLOR]).
|
|
|
832
|
Wed Aug 13 20:13:35 2008 |
Yoichi | Update | SUS | PRM stand-off is glued | Steve, Janne, Rob, Bob, Koji, Yoichi
We finally managed to balance the PRM and |
|
|
834
|
Thu Aug 14 11:39:06 2008 |
steve | Update | PEM | particle counter is out of order | The 40m ifo paricle counter sensor failed
last night. |
|
|
841
|
Fri Aug 15 16:45:43 2008 |
Sharon | Update | | Converting from FIR to IIR | I have been looking into different techniques
to convert from FIR to IIR. This is so we
can see how effective the adaptive FIR filter |
|
|
842
|
Fri Aug 15 17:38:41 2008 |
Yoichi | Update | SUS | OSEM free swinging spectra before the pump down | I ran an overnight measurement of the free
swinging OSEM spectra.
The attm1 shows the results. Everything look |
|
|
846
|
Mon Aug 18 11:50:29 2008 |
Yoichi | Update | SUS | In vacuum free swinging results | The first attachment is the results of the
free swinging spectra measurement performed
in vacuum this morning.
|
|
|
848
|
Mon Aug 18 17:37:14 2008 |
rob | Update | Locking | recovery progress |
I removed the beam block after the PSL periscope
and opened the PSL shutter.
|
|
|
849
|
Mon Aug 18 22:47:12 2008 |
Yoichi | Update | IOO | MC unlock study | As rob noted, the MC keeps unlocking in a
few minutes period.
I plotted time series of several signals |
|
|
850
|
Tue Aug 19 10:36:34 2008 |
Sharon | Update | | Calibrating accelerometers | I took apart the accelerometers near MC1 and
MC2.
The 2 sets of 3 accelerometers are now covered |
|
|
851
|
Tue Aug 19 13:12:55 2008 |
Jenne | Update | SUS | Diagonalized PRM Input Matrix | [SIZE=2][COLOR=blue]NOTE: Use the values
in elog #860 instead (20Aug2008)[/COLOR][/SIZE]
|
|
|
853
|
Tue Aug 19 14:25:38 2008 |
Sharon | Update | PEM | Accelerometer's calibration - update | [COLOR=blue][B]Goal[/B][/COLOR] - Make sure
the accelerometers are calibrated among themselves
(have the same power spectrum when they are |
|
|
854
|
Tue Aug 19 17:00:19 2008 |
Sharon | Update | | Wiener TF calibration - update | [I]This is an update for post 814[/I]
I added the calibration gains I got for the |
|
|
855
|
Tue Aug 19 17:15:34 2008 |
Sharon | Update | | MEDM | I plugged in the gains I got for the accelerometers
in the accelerometers' filters in the PEM
screen of the adaptive filter |
|
|
856
|
Tue Aug 19 18:55:41 2008 |
Yoichi | Update | IOO | MC unlock study update | In entry 849, I reported that the MC transmitted
power drops before the sudden unlocks.
However, because C1:IOO-MC_TRANS_SUM is a |
|
|
860
|
Wed Aug 20 12:04:47 2008 |
Jenne | Update | SUS | Better diagonalization of PRM input matrix | The values here should replace those in entry
#851 from yesterday.
|
|
|
862
|
Wed Aug 20 13:23:32 2008 |
rob | Update | Locking | DRMI locked |
I was able to lock the DRMI this afternoon.
All the optical levers have been centered. |
|
|
863
|
Wed Aug 20 17:02:01 2008 |
Sharon | Update | | More FIR to IIR | I tested another method for converting from
FIR to IIR other than the 2 mentioned in
post 841.
|
|
|
864
|
Wed Aug 20 18:09:48 2008 |
Yoichi | Update | IOO | MC still unlocks | Being suspicious of FSS PC path as the culprit
of the MC unlocks, I opened the FSS box and
connected a probe to the TP7,
|
|
|
868
|
Thu Aug 21 18:13:24 2008 |
rana | Update | IOO | MC WFS Control signals not responsible for lock losses | This is a 4 hour, second-trend of the MC WFS
error and control signals.
|
|
|
869
|
Fri Aug 22 10:39:41 2008 |
Jenne | Update | SUS | Taking Free Swinging spectra of PRM, SRM, ITMX, BS | I'm taking free swinging spectra of PRM, SRM,
ITMX and BS, so I've turned off their watchdogs
for now. I should be done around 11:15am, |
|
|
871
|
Fri Aug 22 16:06:29 2008 |
steve | Update | PEM | particle counter replaced, flowbenches & HEPAs checked | MetOne #2 counter was swapped in (on the top
of IOC, facing SW direction, at ~75 deg upwards)
with channel one size 0.3 micron and channel |
|
|
872
|
Fri Aug 22 17:03:41 2008 |
Yoichi | Update | IOO | MC open loop TF | I measured the open loop TF of the overall
MC loop using the sum-amp A of the MC board.
I used the Agilent 4395A network analyzer |
|
|
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 |
|
|
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 |
|
|
895
|
Fri Aug 29 02:40:43 2008 |
rana,jenne | Update | PSL | PMC Servo Board | [quote]Board is back in. PMC is locked.
[/quote]
|
|
|
901
|
Fri Aug 29 15:01:45 2008 |
steve | Update | PSL | MOPA_HTEMP in increasing | The laser chiller temp is 21.9C ( it should
be 20.0C )
Control room temp 73F ok, no obvious block
|
|
|
905
|
Fri Aug 29 22:57:48 2008 |
Yoichi | Update | PSL | FSS loop transfer functions | I've been measuring a bunch of transfer functions
of the FSS related stuffs.
There are a lot to be analyzed yet, but here |
|
|
907
|
Mon Sep 1 04:34:00 2008 |
rana | Update | PSL | FSS loop transfer functions | I started from 6th item in Yoichi's todo list.
1) Increased the setpoint of the thermostat |
|
|
911
|
Tue Sep 2 10:09:03 2008 |
steve | Update | PSL | head temp is cooling down | The chiller was over flowing this morning.
800 cc of water was removed.
PSL-126MOPA_HTEMP peaked at 20.7 C (normal |
|
|
912
|
Tue Sep 2 14:28:41 2008 |
Yoichi | Update | PSL | FSS EOM driving signal spectra | Rich advised me to change the +10V input of
the FSS crystal frequency reference board
from whatever voltage supply we use now to |
|
|
918
|
Thu Sep 4 00:38:14 2008 |
rana | Update | PSL | c1iovme power cycled | Entry 663 has a plot of this using the PSL/FSS/SLOWscan
script. It shows that the SB's were ~8x smaller
than the carrier.
|
|
|
919
|
Thu Sep 4 07:29:52 2008 |
Yoichi | Update | PSL | c1iovme power cycled | [quote]Entry 663 has a plot of this using
the PSL/FSS/SLOWscan script. It shows that
the SB's were ~8x smaller than the carrier.
|
|
|
920
|
Thu Sep 4 07:46:10 2008 |
Yoichi | Update | IOO | MC is now happy | The MC has been locked for more than 12 hours
continuously now !
Changes I made yesterday were:
|
|
|
921
|
Thu Sep 4 10:13:48 2008 |
Jenne | Update | IOO | We unlocked the MC temporarily | [Joe, Eric, Jenne]
While trying to diagnose some DAQ/PD problems |
|
|
923
|
Thu Sep 4 13:48:50 2008 |
Yoichi | Update | PSL | FSS modulation depth | I scanned the reference cavity with the NPRO
temperature (see the attached plot).
The power ratio between the carrier and the |
|
|
924
|
Thu Sep 4 14:43:58 2008 |
Jenne | Update | PSL | PMC Open Loop Gain | I have measured the PMC's open loop gain.
[SIZE=3][COLOR=green]UGF is 629.7Hz, with
a phase margin of 53 degrees.
|
|
|
926
|
Thu Sep 4 17:03:25 2008 |
Yoichi | Update | PSL | RF oscillator noise comparison | I measured current spectra of the RF signal
going to the FSS EOM.
The attachment compares the spectra between |
|
|
927
|
Thu Sep 4 17:12:57 2008 |
Yoichi | Update | PSL | FSS open loop TF | I changed the gain settings of the FSS servo.
Now the Common Gain is 5dB (the last night
it was 2dB) and the Fast Gain is 12dB (formerly |
|
|
928
|
Thu Sep 4 17:17:03 2008 |
Yoichi | Update | IOO | MC open loop TF | I measured open loop transfer functions of
the MC servo.
The UGF was about 30kHz. Since there was |
|
|
929
|
Thu Sep 4 17:44:27 2008 |
Yoichi | Update | PSL | FSS error signal spectrum | Attached is a spectrum of the FSS error signal.
There are a lot of sharp peaks above 100kHz
(the UGF of the servo is about 200kHz).
|
|
|
931
|
Fri Sep 5 08:34:03 2008 |
steve | Update | PSL | MZ locked | The MC is happy.
The MZ can be locked if you move the slider
by hand. |
|
|
933
|
Fri Sep 5 10:36:34 2008 |
steve | Update | PEM | thermostate setting changed | Some one changed the thermostat (old control
room ) setting behind 1Y6 from 73 to 79F
It should be in the elog.
|
|