| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1137
|
Fri Nov 14 20:35:47 2008 |
rana | Update | PSL | Reference cavity ring down | To make the DEI pulser make a fast pulse on
the EO shutter EOMs, we had to make sure:
|
|
|
1138
|
Fri Nov 14 22:40:51 2008 |
Yoichi | Update | PSL | Reference cavity ring down | [quote]
To make the DEI pulser make a fast pulse
on the EO shutter EOMs, we had to make sure:
|
|
|
1140
|
Mon Nov 17 15:07:06 2008 |
Yoichi | Update | PSL | Reference cavity ring down | I used MATLAB's system identification tool
box to estimate the response of the reference
cavity, i.e. cavity pole.
|
|
|
1149
|
Thu Nov 20 09:37:39 2008 |
steve | Update | PSL | MZ vs temp | This 12 days plot shows that it can hold lock
if the daily temp variation is not more than
3/4 of a degree C
|
|
|
1151
|
Fri Nov 21 16:11:26 2008 |
rana, alberto, rob | Update | PSL | Mach Zender alignment | The Mach Zender's dark port DC voltage had
gone up too high (~0.5 V)and was turning
yellow
|
|
|
1155
|
Fri Nov 21 20:29:43 2008 |
rana, alberto, rob | Update | PSL | Mach Zender alignment | [quote] So now the MZ alignment seems good;
Alberto is on the MC periscope alignment
like a cheap suit.[/quote]
|
|
|
1160
|
Mon Nov 24 17:14:44 2008 |
rana | Update | PSL | Mach Zender trends | It looks like the MZ has gotten less drifty
after the alignment on Friday. |
|
|
1162
|
Tue Nov 25 18:38:03 2008 |
Alberto, Rob | Update | PSL | MC Periscope Alignment | This morning when I came in I found the MC
cleaner unlocked and the autolocker script
could not lock it. The reflected beam was |
|
|
1166
|
Tue Dec 2 17:56:56 2008 |
Alberto, Rana | Configuration | PSL | MC Alignment | In the attempt to maximize the Mode Cleaner
transmission and minimize the reflection
from the steering mirrors of the MC periscope, |
|
|
1169
|
Wed Dec 3 11:58:10 2008 |
Alberto | Update | PSL | MC Alignment | Rana, Alberto,
more details on the MC alignment we did yesterday.
|
|
|
1190
|
Fri Dec 12 22:51:23 2008 |
Yoichi | Update | PSL | Reference cavity ring down measurement again | Bob made new HV-cables with HV compatible
coaxes. The coax cable is rated for 2kV,
which was as high as Bob
|
|
|
1191
|
Tue Dec 16 19:06:01 2008 |
Yoichi | Update | PSL | Reference cavity ring down repeated many times | Today, I repeated the reference cavity ring
down measurement many times to see how much
the results vary.
|
|
|
1228
|
Wed Jan 14 15:53:32 2009 |
steve | DAQ | PSL | MC temperature sensor | [quote]I added a channel for the temperature
sensor on the MC1/MC3 chamber: C1:PSL-MC_TEMP_SEN.
To do that I had to reboot the frame builder. |
|
|
1244
|
Thu Jan 22 11:54:09 2009 |
Alberto | Configuration | PSL | Mach Zehnder Output Beam QPD | I rotated by 180 degrees the 10% beam splitter
that it is used to fold the beam coming from
the Mach Zehnder (directed to the MC) on |
|
|
1246
|
Thu Jan 22 14:38:41 2009 |
caryn | DAQ | PSL | MC temperature sensor | [quote][quote]I added a channel for the temperature
sensor on the MC1/MC3 chamber: C1:PSL-MC_TEMP_SEN.
To do that I had to reboot the frame builder. |
|
|
1248
|
Fri Jan 23 10:00:21 2009 |
steve | Update | PSL | PMC transmission is down | The PMC transmission is going down.
I have not relocked the PMC yet. |
|
|
1250
|
Fri Jan 23 14:00:02 2009 |
Yoichi | Update | PSL | PMC transmission is down | [quote]The PMC transmission is going down.
I have not relocked the PMC yet.[/quote]
|
|
|
1254
|
Wed Jan 28 12:42:51 2009 |
Yoichi | Update | PSL | MOPA dying | Yoichi, Jenne, Peter
As most of you know, the MOPA output power |
|
|
1256
|
Wed Jan 28 19:08:50 2009 |
Yoichi | Update | PSL | Laser is back (sort of) | Yoichi, Peter, Jenne
Summary:
|
|
|
1257
|
Thu Jan 29 13:52:34 2009 |
Yoichi | Update | PSL | Laser is back (sort of) | Here is what I think has happened to the laser.
After the chiller line to the NPRO base clogged, |
|
|
1260
|
Thu Jan 29 18:10:13 2009 |
Yoichi | Update | PSL | ISS Bad | Kakeru, Yoichi
As we noted before, the ISS is unstable. |
|
|
1262
|
Fri Jan 30 19:38:57 2009 |
Kakeru | Update | PSL | ISS Bad | Kakeru, Peter
We try to improve ISS bord, but there isn't |
|
|
1270
|
Tue Feb 3 23:44:44 2009 |
Kakeru, Peter, Yoichi | Update | PSL | ISS unstability | We found that one OP-amp used in ISS servo
oscillated in 10 MHz, 100mV.
Moreover, we found another OP-amp |
|
|
1276
|
Thu Feb 5 21:42:28 2009 |
Yoichi | Update | PSL | My thoughts on ISS | Today, I worked with Kakeru on ISS.
The problem is sort of elusive. Some
time, the laser power looks fine, but after |
|
|
1277
|
Fri Feb 6 09:52:35 2009 |
Kakeru | Update | PSL | Current shunt transfar function | I attach the transfar function of the current
shunt.
There is a little gap at 10 Hz for |
|
|
1278
|
Fri Feb 6 09:56:11 2009 |
Kakeru | Update | PSL | ISS servo transfar function | I attache the transfar function of ISS
servo.
The 4th stage and variable gain amplifier |
|
|
1279
|
Fri Feb 6 10:46:40 2009 |
Kakeru | Update | PSL | ISS servo and noise | I measured the output noise of eache stage
of ISS servo, and calcurated the noise ratio
between input and
|
|
|
1281
|
Fri Feb 6 16:20:52 2009 |
Yoichi | Update | PSL | MOPA current slider fixed | I fixed the broken slider to change the
current of the PA.
The problem was that the EPICS database |
|
|
1283
|
Fri Feb 6 23:23:48 2009 |
Kakeru, Yoichi | Update | PSL | ISS is fixed | Yoichi and me found that the transfar function
of the current shunt changed with the current
of PA. |
|
|
1284
|
Mon Feb 9 16:02:42 2009 |
Yoichi | Update | PSL | PSL relative intensity noise | I attached the relative intensity noise of
the PSL.
There is no bump around the lower UGF (~1Hz), |
|
|
1287
|
Mon Feb 9 19:50:48 2009 |
Yoichi | Configuration | PSL | ISS disconnected | We are doing measurements on ISS.
The ISS feedback connector is disconnected
and the beam to the MC is blocked. |
|
|
1289
|
Tue Feb 10 23:36:25 2009 |
Kakeru | Update | PSL | PA current and laser output | I changed the PA current and measured laser
output power (monitor PD signal).
The gain of ISS is 13dB
|
|
|
1291
|
Wed Feb 11 07:28:25 2009 |
Yoichi | Update | PSL | PA current and laser output | I think we should also plot the laser power
at the MOPA output. The horizontal axis should
be the absolute current value read from the |
|
|
1295
|
Wed Feb 11 23:51:53 2009 |
Kakeru | Update | PSL | PA current and laser output | I attached a plot of ISS monitor PD and MOPA
output to PA current.
The both end of PA current (26.0353[A] and |
|
|
1299
|
Thu Feb 12 18:35:10 2009 |
Kakeru | Configuration | PSL | PA current limitter |
I added a PA current limiter.
It is only a voltage devider (composed |
|
|
1357
|
Wed Mar 4 23:42:45 2009 |
rana | Configuration | PSL | psl db change | I made |
|
|
1395
|
Thu Mar 12 18:44:02 2009 |
Yoichi | Update | PSL | MZ aligned | The MC lost the alignment somehow this afternoon.
So I thought it was good time to touch the
MZ because I had to align the MC using the |
|
|
1421
|
Tue Mar 24 13:10:07 2009 |
Alberto | Configuration | PSL | new mirror installed on the AP table | New flipping mirror installed on the AP
table on the beam path to the REFL199 PD.
If you're missing the double demod |
|
|
1431
|
Thu Mar 26 04:01:24 2009 |
Yoichi | Update | PSL | FSS Open Loop Gain | Yoichi, Peter, Jenne
Attached is the open loop transfer function |
|
|
1470
|
Fri Apr 10 18:11:18 2009 |
Jenne | Update | PSL | ISS has a bad cable? | [Rob, Jenne]
I noticed that the ISS Mean Value
and CS Saturation were both |
|
|
1471
|
Fri Apr 10 19:09:48 2009 |
Jenne | Update | PSL | PMC LO Calibration | I measured the RF LO output level from the
PMC's LO board which goes directly into the
LO input on the PMC Servo board. This goes |
|
|
1473
|
Sat Apr 11 00:45:41 2009 |
Yoichi | Update | PSL | PMC LO Calibration | [quote]
I then changed the RF Output Adjust slider
in increments of 0.5, and measured the peak-to-peak |
|
|
1475
|
Sun Apr 12 19:27:20 2009 |
rana | Update | PSL | PMC LO Calibration | [quote]
3.8Vpp is about 16dBm.
The mixer for the PMC demodulator is level |
|
|
1477
|
Mon Apr 13 08:59:57 2009 |
steve | Update | PSL | mixers on order | [quote][quote]
I then changed the RF Output Adjust slider
in increments of 0.5, and measured the peak-to-peak |
|
|
1478
|
Mon Apr 13 17:55:37 2009 |
Jenne | Update | PSL | PMC LO Mon Calibration | I have calibrated the PMC LO Mon (C1:PSL-PMC_LODET)
on the PMC's EPICS screen, by inputting different
RF LO levels into the LO input of the PMC |
|
|
1487
|
Wed Apr 15 17:11:37 2009 |
Jenne | Update | PSL | Edited c1psl.db to calibrate PMC's LO mon |
Following the method in Peter's
Elog,
I edited c1psl.db to include
the following:
grecord(calc, "C1:PSL-PMC_LOCALC")
{
|
|
|
1488
|
Thu Apr 16 11:17:56 2009 |
Jenne | Update | PSL | Edited c1psl.db to calibrate PMC's LO mon |
|
|
|
1502
|
Mon Apr 20 19:51:51 2009 |
Jenne | Configuration | PSL | PMC has new Level 13 Mixer installed | The new Level 13 mixer on the PMC servo
board is installed (minicircuits SRA-3MH).
Since the RF output of the LO board was ~16dBm, |
|
|
1568
|
Sat May 9 00:15:21 2009 |
Yoichi | Update | PSL | Laser head temperature oscillation | After the laser cooling pipe was unclogged,
the laser head temperature has been oscillating
in 24h period.
|
|
|
1569
|
Sat May 9 02:20:11 2009 |
Jenne | Update | PSL | Laser head temperature oscillation | [quote]After the laser cooling pipe was unclogged,
the laser head temperature has been oscillating
in 24h period.
|
|