| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2776
|
Tue Apr 6 16:55:28 2010 |
Alberto | Update | Computer Scripts / Programs | Data formats in the Agilent AG4395a Spectrum Analyzer |
|
|
|
2777
|
Tue Apr 6 22:54:34 2010 |
Koji | Update | SUS | ITMY (south) aligned | Kiwamu and Koji
ITMY
(south) was aligned |
|
|
2778
|
Wed Apr 7 09:00:01 2010 |
steve | HowTo | PEM | prepare to open chamber | In order to minimize the diffusion of more
dust particles into the vented IFO vacuum
envelope |
|
|
2779
|
Wed Apr 7 10:48:04 2010 |
Alberto | Update | Electronics | REFL11 Noise Simulation | LISO simulations confirm the estimate
of ~15nV for the noise of REFL11.
The
largest contribution comes from the 50Ohm |
|
|
2780
|
Wed Apr 7 10:58:15 2010 |
Koji | Update | Electronics | REFL11 Noise Simulation | What??? I don't see any gray trace
of Rs in the plot. What are you talking about?
Anyway, if you are true, the circuit |
|
|
2781
|
Wed Apr 7 11:11:19 2010 |
Alberto | Update | Electronics | REFL11 Noise Simulation |
|
|
|
2782
|
Thu Apr 8 10:17:52 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent | From the measurements of the 11 MHz RFPD
at 11Mhz I estimated a transimpedance of
about 750 Ohms. (See attached plot.) |
|
|
2783
|
Thu Apr 8 10:24:33 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2784
|
Thu Apr 8 20:53:13 2010 |
Koji | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent | Something must be wrong.
1. Physical Unit is wrong for the
second term of "Vn = Vdn + Sqrt(2 e |
|
|
2785
|
Fri Apr 9 06:45:28 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2786
|
Sun Apr 11 13:51:04 2010 |
Alberto | Omnistructure | Computers | Where are the laptops? | I can't find the DELL laptop anywhere in
the lab. Does anyone know where it is?
Also one of the two netbooks is missing. |
|
|
2787
|
Sun Apr 11 19:05:34 2010 |
Koji | Omnistructure | Computers | Where are the laptops? | One dell is in the clean room for the suspension
work.
|
|
|
2788
|
Mon Apr 12 14:20:10 2010 |
kiwamu | Update | Green Locking | PZT response for the innolight | I measured a
jitter modulation caused by |
|
|
2789
|
Mon Apr 12 16:20:05 2010 |
Alberto | Configuration | 40m Upgrading | REFL55 improved | During the commissioning of the AS55
PD, I learned how to get a much better rejection
of the 11MHz modulation.
So I |
|
|
2790
|
Mon Apr 12 17:09:30 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2791
|
Mon Apr 12 17:37:52 2010 |
josephb | Update | Computers | Y end simulated plant progress | Currently, the y end plant is yep.mdl.
In order to compile it |
|
|
2792
|
Mon Apr 12 17:48:32 2010 |
Aidan | Update | Computer Scripts / Programs | elog restarted | The elog crashed when I was uploading
a photo just now. I logged into nodus and
restarted it. |
|
|
2793
|
Mon Apr 12 19:50:30 2010 |
Aidan | Summary | Green Locking | Temperature sweep of the Lightwave: df/dT = 2.8GHz/K | The beams from the Innolight and Lightwave
NPROs were both incident on a 1GHZ New Focus
PD. Mott and I swept the temperature of the |
|
|
2794
|
Mon Apr 12 20:48:51 2010 |
Aidan, Mott | Summary | Green Locking | Temperature sweep of the Innolight: df/dT ~ 3.3GHz/K |
|
|
|
2795
|
Mon Apr 12 22:44:30 2010 |
Koji | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent | Data looks perfect ... but the fitting
was wrong.
Vn = Vdn + Z * sqrt( 2 e Idc ) |
|
|
2796
|
Mon Apr 12 22:51:31 2010 |
Koji | Update | SUS | ITMX installed and aligned | Koji
ITMX
was aligned |
|
|
2797
|
Tue Apr 13 12:39:51 2010 |
Aidan, Mott | Summary | Green Locking | Temperature sweep of the Innolight: df/dT ~ 3.3GHz/K | Please put those numbers onto wiki somewhere
at the green page or laser characterization
page. |
|
|
2798
|
Tue Apr 13 12:49:35 2010 |
josephb | Update | Computers | Y end simulated plant progress |
|
|
|
2799
|
Tue Apr 13 19:53:06 2010 |
Mott | Update | Green Locking | PZT response for the innolight and lightwave |
I redid the PZT Phase Modulation
measurement out to 5 MHz for both the Innolight |
6x |
|
2800
|
Tue Apr 13 20:02:02 2010 |
Koji | Update | SUS | BS chamber opened, PRM/SRM SOS removed from the table | Bob, Steve, and Koji
We
opened North heavy door of the BS chamber |
|
|
2801
|
Thu Apr 15 14:47:28 2010 |
steve | Update | Electronics | 25MHZ oscillation of HP4195A | The 1979 vintage RF spectrum analyzer HP4195A
sn2904J01587 shipped out for repair
today to http://www.avalontest.com |
|
|
2802
|
Fri Apr 16 17:26:23 2010 |
Jenne | Update | PEM | Guralp Breakout Box pulled | I
pulled the Guralp breakout box from the rack,
and it's sitting on the EE bench here. |
|
|
2803
|
Fri Apr 16 17:46:54 2010 |
Koji | Update | VAC | Peeting mirrors aligned | Steve and Koji
We aligned the peeping mirrors to
look at the surface of the ITMs. |
|
|
2804
|
Sat Apr 17 18:30:12 2010 |
Zach | Update | Green Locking | 1W NPRO output profile | NOTE:
This measurement is wrong and
only remains for documentation purposes. |
|
|
2805
|
Mon Apr 19 05:54:50 2010 |
rana | Configuration | PSL | RC Temperature Servo Turned OFF temporarily | In order to measure the transfer function
of the RC cavity's foam, I've turned off
the servo so that the room temperature noise |
|
|
2806
|
Mon Apr 19 07:38:07 2010 |
rana | HowTo | Electronics | Repair and Calibration of SR560: s/n 59650 | Frank noticed that this particular SR560
had an offset on the output which was unzeroable
by the usual method of tuning the trim pot |
|
|
2807
|
Mon Apr 19 11:31:04 2010 |
Aidan | Update | Green Locking | 1W NPRO output profile |
|
|
|
2808
|
Mon Apr 19 13:23:03 2010 |
josephb | Configuration | Computers | yum update fixed on control room machines | I went to Ottavia, and tried running yum
update. It was having dependancy issues
with mjpegtools, which was a rpmforge provided |
|
|
2809
|
Mon Apr 19 16:27:13 2010 |
Aidan | Update | Green Locking | Raicol crystals arrived and we investigated them | Jenne, Koji and I opened up the package
from Raicol and examined the crystals under
the microscope. The results were mixed and |
|
|
2810
|
Mon Apr 19 16:31:42 2010 |
Kevin | Update | PSL | Innolight 2W Laser | Koji and Kevin
We unpacked the Innolight 2W laser,
took an inventory, and scanned the operations |
|
|
2811
|
Tue Apr 20 00:32:30 2010 |
Jenne | Update | PEM | Guralp Breakout Box put back |
|
|
|
2812
|
Tue Apr 20 07:48:42 2010 |
steve | Update | PSL | ion pump HV turned on | We found ref-cavity HV was off yesterday
afternoon. It was turned back on. |
|
|
2813
|
Tue Apr 20 08:00:52 2010 |
steve | Update | SUS | ETMY damping restored | ETMY sus damping was restored |
|
|
2814
|
Tue Apr 20 09:15:15 2010 |
steve | Summary | SAFETY | annual safety audit | |
|
|
2815
|
Tue Apr 20 10:55:10 2010 |
steve | Bureaucracy | SAFETY | Kevin Kuns received safety training | The 40m's new undergrad Kevin Kuns was
introduced to 40m safety hazards. He is new
and needs guidance as specially with 2W laser |
|
|
2816
|
Tue Apr 20 11:14:31 2010 |
Aidan | Update | Green Locking | Raicol crystals arrived and we investigated them |
Here
is Crystal 724 polished side 2 with all photos |
|
|
2817
|
Tue Apr 20 13:00:52 2010 |
Zach | Update | elog | elog restarted | I restarted the elog with the restart
script as it was down. |
|
|
2818
|
Tue Apr 20 13:02:14 2010 |
Zach | Update | Green Locking | 1W NPRO output profile | EDIT:
I used an IFIT (inverse fast idiot transform)
to change the x-axis of the plot from Hz |
|
|
2819
|
Tue Apr 20 13:37:36 2010 |
Jenne | Update | Green Locking | 1W NPRO output profile |
|
|
|
2820
|
Tue Apr 20 18:02:22 2010 |
Jenne | Update | COC | New SRM and PRM Hung | [Jenne, Steve]
We removed the old SRM and PRM from
their cages, and are temporarily storing |
|
|
2821
|
Tue Apr 20 19:37:02 2010 |
Koji | Update | Green Locking | 1W NPRO output profile | Beautiful fitting.
|
|
|
2822
|
Tue Apr 20 20:15:37 2010 |
Kevin | Update | PSL | Innolight 2W Output Power vs Injection Current | Koji and Kevin measured the output power
vs injection current for the Innolight 2W
laser. |
|
|
2823
|
Wed Apr 21 10:09:23 2010 |
kiwamu | Update | Green Locking | waist positon of Gaussian beam in PPKTP crystals | Theoretically the waist position of
a Gaussian beam (1064) in our PPKTP crystal
differs by ~6.7 mm from that of the incident |
|
|
2824
|
Wed Apr 21 11:32:31 2010 |
josephb | Update | CDS | 40m CDS hardware update and software requests | This is mostly a reminder to myself about
what I discussed with Jay and Alex this morning.
The big black IO chassis are "almost" |
|
|
2825
|
Wed Apr 21 15:53:57 2010 |
Jenne | Update | PEM | Seismometers now on the granite slab | The 3 seismometers are now on the granite
slab. The Ranger is now aligned with
the Xarm (perpendicular to the Mode Cleaner) |
|