| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2706
|
Wed Mar 24 03:58:18 2010 |
kiwamu, matt, koji | Update | Green Locking | leave PLL locked | We are leaving the PLL as it is locked
in order to see the long term stability.
And we will check the results in early morning |
|
|
2705
|
Wed Mar 24 02:06:24 2010 |
Koji | Update | IOO | vac envelope has to be sealed as antproof for overnight | Matt and Koji:
We closed the light doors of the
chambers. |
|
|
2704
|
Tue Mar 23 22:46:43 2010 |
Alberto | Update | 40m Upgrading | REFL11 upgraded | I modified REFL11 according to the changes
lsited in this
schematic (see wiki / Upgrade 09 |
|
|
2703
|
Tue Mar 23 18:44:46 2010 |
Mott | Update | ABSL | PLL reconstructed |
After realigning and getting
the lock today, I tried to add in the SR785 |
|
|
2702
|
Tue Mar 23 15:38:26 2010 |
Alberto | Update | elog | elog just restarted | I found the elog down and I restarted it.
Then, after few seconds it was down
again. Maybe someone else was messing with |
|
|
2701
|
Tue Mar 23 10:11:13 2010 |
steve | Update | PEM | small air cond unit failed yesterday | Old control room air condition failed yesterday
around noon. It was blowing 80-85F hot air
for about 2-3 hours at racks 1Y4-7 and the |
|
|
2700
|
Tue Mar 23 09:55:20 2010 |
Koji | Update | IOO | vac envelope has to be sealed as antproof for overnight | Roger.
|
|
|
2699
|
Tue Mar 23 09:37:36 2010 |
steve | Update | IOO | vac envelope has to be sealed as antproof for overnight |
|
|
|
2698
|
Tue Mar 23 00:31:51 2010 |
Koji | Update | IOO | MC realigned | This is the first touch to the MC mirrors
after the earthquake on 16th.
I made an aluminum access |
|
|
2697
|
Mon Mar 22 23:37:32 2010 |
Mott | Update | ABSL | PLL reconstructed |
We have managed to lock the PLL to
reasonable stability. The RF input is attenuated |
|
|
2696
|
Mon Mar 22 22:11:26 2010 |
Mott | Update | ABSL | PLL reconstructed |
It looks like the PLL drifted
alot over the weekend, and we couldn't get |
|
|
2695
|
Mon Mar 22 16:57:45 2010 |
josephb,daisuke, alex | Configuration | Computers | Megatron test points working again | We changed the pointer on /cvs/cds/caltech/target/gds/bin/awgtpman
from
/opt/gds/awgtpman to |
|
|
2694
|
Mon Mar 22 11:37:09 2010 |
steve | Update | PEM | jackhammering | There was more jackhammering this morning
just about 20 ft north-west of the beamsplitter
chamber, outside. |
|
|
2693
|
Mon Mar 22 10:07:30 2010 |
Koji | Summary | Electronics | UPDH Box #17: Ready | For your reference: Voltage noise of LM7815/LM7915
(with no load) |
|
|
2692
|
Mon Mar 22 02:03:57 2010 |
rana | Summary | Electronics | UPDH Box #17: Ready | It took too long to get this box ready
for action. I implemented all of the changes
that I made on the previous one (#1437). |
|
|
2691
|
Sun Mar 21 21:02:39 2010 |
Koji | Update | PSL | EOM waist size | You don't need a lengthy code for this. It
is obvious that the spot size at the distance
L is minimum when L =
|
|
|
2690
|
Sun Mar 21 20:08:20 2010 |
kiwamu, rana | Update | PSL | EOM wasit size | We
are going to set the waist size to 0.1 mm for |
|
|
2689
|
Sun Mar 21 19:25:29 2010 |
rana | Update | PEM | Guralp2 centered again | From this morning, now in calibrated units,
and with the Güralp self noise spec
from the Güralp manual. |
|
|
2688
|
Sat Mar 20 18:34:19 2010 |
kiwamu | Summary | Electronics | RE:advantege of our triple resonant EOM | Yes, I found it.
Their advantage is that their circuit
is isolated at DC because of the input capacitor. |
|
|
2687
|
Fri Mar 19 23:03:41 2010 |
rana | Update | PEM | Guralp2 centered again | I went and double-checked and aligned the
styrofoam cooler at ~5:00 UTC. It was fine,
but we really need a better huddling box. |
|
|
2686
|
Fri Mar 19 21:15:33 2010 |
rana | Update | PEM | Guralp2 centered again | This trend of the last 200 days shows that
GUR2 has been bad forever...until now anyways.
|
|
|
2685
|
Fri Mar 19 18:00:14 2010 |
jenne | Update | PEM | Guralp2 centered again | [Jenne, Sanjit]
It looks like Steve used a GND-12V
supply to power the Guralp through the little |
|
|
2684
|
Thu Mar 18 21:42:26 2010 |
Koji | Update | ABSL | PLL reconstructed | I checked the setup further more.
I replaced the PD from
NewFocus 1GHz one to Thorlabs PDA255.
|
|
|
2683
|
Thu Mar 18 19:00:04 2010 |
Koji | Summary | Electronics | advantege of our triple resonant EOM | Did you find what is the merit of their
impedance matching technique?
|
|
|
2682
|
Thu Mar 18 15:33:17 2010 |
kiwamu | Summary | Electronics | advantege of our triple resonant EOM | In
this LVC meeting I discussed about triple
resonant EOMs with Volker who was a main |
|
|
2681
|
Thu Mar 18 13:40:35 2010 |
Koji | Update | ABSL | PLL reconstructed | We use the current PLL just now, but the
renewal of the components are not immediate
as it will take some time. Even so we need |
|
|
2680
|
Thu Mar 18 12:27:56 2010 |
Alberto | Update | ABSL | PLL reconstructed |
|
|
|
2679
|
Thu Mar 18 10:46:51 2010 |
Koji | Update | ABSL | PLL reconstructed | Last night (Mar 17) I checked the PLL
setup as Mott have had some difficulty to
get a clean lock of the PLL setting. |
|
|
2678
|
Thu Mar 18 08:49:51 2010 |
steve | Update | PEM | Guralp2 centered again ? |
Someone adjusted the Guralp2 mass
position last night?? |
|
|
2677
|
Tue Mar 16 09:37:30 2010 |
steve | Update | SUS | eq 4.4 seen by oplevs and osems | The oplev plots clearly show the alignment
effect of this eq. |
|
|
2676
|
Tue Mar 16 05:10:39 2010 |
koji | Update | Environment | Earthquake, Mag 4.4 | Some of the suspensions got watchdog tripped
-> enabled -> damped.
The MC mirrors got slightly misaligned. |
|
|
2675
|
Tue Mar 16 04:22:02 2010 |
Jenne | Update | Environment | Earthquake, Mag 4.4 | Earthquake Details
Magnitude
|
|
|
2674
|
Mon Mar 15 16:39:36 2010 |
steve | Update | PEM | Guralp2 centered |
|
|
|
2673
|
Mon Mar 15 09:43:47 2010 |
steve | Update | PEM | more sandblasting today | Do not open IFO vacuum envelope today!
They are sandblasting again at CES |
|
|
2672
|
Sat Mar 13 22:16:03 2010 |
rana | Update | WienerFiltering | Guralp Huddle Test software | I used some recent better data to try for
better Z subtraction.
Dmass helped me understand that sqrt(1-Coherence) |
|
|
2671
|
Sat Mar 13 21:30:22 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | |
|
|
2670
|
Fri Mar 12 17:08:22 2010 |
steve | Configuration | VAC | bg-RGAscan at d18 | RGA scan of rga-region only at day 18
This is the back ground of the rga with some
calibration gas. |
|
|
2669
|
Fri Mar 12 13:52:18 2010 |
Zach | Update | elog | elog restarted | The elog was down and I ran the restart
script. |
|
|
2668
|
Thu Mar 11 17:51:04 2010 |
Koji | Update | SUS | Recent status of SOSs | Jenne, Koji
Recent status of SOSs:
|
|
|
2667
|
Thu Mar 11 15:24:51 2010 |
steve | Metaphysics | Environment | IFO was well protected |
|
|
|
2666
|
Wed Mar 10 15:02:58 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | This is the spectra and coherence from
a quiet time last night. I've lowered the
Guralp cal by a factor of 2 to account for |
|
|
2665
|
Tue Mar 9 12:06:53 2010 |
rana, Jenne | Update | PEM | Styrofoam Cooler on the Seismos | Looks like the GUR2_X signal is bad. Jenne
says that we need to center it mechanically
before the signals will become useful again. |
|
|
2664
|
Tue Mar 9 09:32:31 2010 |
Koji | Summary | General | Wideband measurement of Fast PZT response | I have measured a wideband response
of the fast PZT in the LWE NPRO 700mW in
the Alberto's setup. |
|
|
2663
|
Tue Mar 9 09:04:20 2010 |
steve | Update | PEM | keep vacuum chamber closed | They are sandblasting at CES: our particle
counts are very high. DO NOT OPEN CHAMBER! |
|
|
2662
|
Mon Mar 8 18:15:27 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | I put Jenne's
cooler over the seismometers |
|
|
2661
|
Sun Mar 7 23:05:39 2010 |
rana | Update | PEM | Seismic witnesses near MC1 tank moved |
|
|
|
2660
|
Sun Mar 7 07:01:21 2010 |
rana | Update | WienerFiltering | Guralp Huddle Test software | We need to do a new huddle test of the
Guralps for the Wiener filtering paper. The
last test had miserable results. |
|
|
2659
|
Fri Mar 5 18:04:56 2010 |
rana | Update | SUS | used OSEMs are magnetic | The OSEM LEDs and PDs from Honeywell have
always had some ferromagnetic material in
them. These are the same OSEMs we had since |
|
|
2658
|
Fri Mar 5 11:21:18 2010 |
steve | Update | SUS | used OSEMs are magnetic |
|
|
|
2657
|
Thu Mar 4 22:07:21 2010 |
rana | Update | 40m Upgrading | 11MHz PD not yet designed | Use 10 Ohms for the resistance - I have
never seen a diode with 25 Ohms.
p.s. PDFs can be joined together |
|