ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
2246
|
Thu Nov 12 01:18:34 2009 |
haixing | Update | SUS | open-loop transfer function of mag levi system (comparison between simulink and measurement) | I built a Simulink model of the magnetic
levitation system and try to explain
the dip in the open-loop transfer function |
  |
2274
|
Mon Nov 16 15:18:10 2009 |
haixing | Update | SUS | Stable magnetic levitation without eddy-current damping |
|
 |
2280
|
Tue Nov 17 11:09:43 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | I have connected ETMY sus electronics to
megatron ADC/DAC.
We continue this state until 15:00 |
|
2281
|
Tue Nov 17 13:39:37 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | 0) Now the connection for the ETMY suspension
was restored in a usual state. It damps
well. |
|
2282
|
Tue Nov 17 15:23:06 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | OK.
Now, Timing/ADC/DAC are working. It's almost
there.
1) As a temporaly |
|
2285
|
Tue Nov 17 21:10:30 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | Koji, Rana
The megatron DAC was temporaly connected
to the suspension electronics for the DAC |
|
2287
|
Tue Nov 17 21:21:30 2009 |
rob | Update | SUS | ETMY UL OSEM | Had been disconnected for about two weeks.
I found a partially seated 4-pin LEMO cable
coming from the OSEM PD interface board. |
|
2290
|
Wed Nov 18 11:27:33 2009 |
Koji, josephb | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC |
|
|
2291
|
Wed Nov 18 12:33:30 2009 |
Koji, josephb | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | Hurraaaah!
We've got the damping of the suspension.
The Oplev loops has also worked!
The |
|
2293
|
Wed Nov 18 16:24:25 2009 |
pete | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | /cvs/cds/caltech/target/fb/daqd -c daqdrc
This starts the FB.
Now the dataviewer and DTT work! |
|
2307
|
Fri Nov 20 11:32:48 2009 |
Haixing | Update | SUS | Magnetic levitation | I added an integrator to increase
the gain at low frequencies (below 5 Hz).
In addition, I increased |
  |
2309
|
Fri Nov 20 16:18:56 2009 |
rob | Configuration | SUS | watchdog rampdown | I've changed the watchdog rampdown script
so it brings the SUS watchdogs to 220, instead
of the 150 it previously targeted. |
|
2313
|
Mon Nov 23 11:03:00 2009 |
steve | Update | SUS | jackhammer special well under control |
|
 |
2331
|
Wed Nov 25 12:28:22 2009 |
Jenne | Update | SUS | MC2 tripped | Just felt a big "kerplunk" type
ground-shaking, presumably from all the antics
next door. MC2's watchdog tripped as |
|
2363
|
Tue Dec 8 03:53:49 2009 |
kiwamu | Update | SUS | Free swinging spectra of ETMX | In this night, I checked the free swinging
spectra of ETMX to make sure nothing wrong
with ETMX by the wiping. |
|
2368
|
Tue Dec 8 23:13:32 2009 |
kiwamu | Update | SUS | free swinging spectra of ETMY and ITMX | The free swinging spectra of ETMY and ITMX
were taken after today's wiping, in order
to check the test masses. |
 |
2369
|
Wed Dec 9 00:23:28 2009 |
Koji | Update | SUS | free swinging spectra of ETMY and ITMX | Where
is the plot for the trend?
It |
|
2372
|
Wed Dec 9 17:51:03 2009 |
kiwamu | Update | SUS | watchdogs | Please do not touch
the watchdogs for all SUSs except for MCs, |
|
2374
|
Wed Dec 9 21:09:28 2009 |
kiwamu | Update | SUS | Re: free swinging spectra of ETMY and ITMX | Okay, now the data are attached. At that
time I just wanted to say like the follower.
- - - |
|
2375
|
Thu Dec 10 00:46:15 2009 |
Koji | Update | SUS | Re: free swinging spectra of ETMY and ITMX | Well, I get the point now. It could
be either seismic or change in the suspension
Q. |
|
2391
|
Thu Dec 10 17:13:36 2009 |
kiwamu | Update | SUS | Free swiging spectra under the atmospheric pressure | The free swinging spectra of ITMs, ETMs,
BS, PRM and SRM were measured last night
in order to make sure that nothing wrong |
|
2405
|
Sun Dec 13 17:43:10 2009 |
kiwamu | Update | SUS | free swinging spectra (vacuum) | The free swinging spectra of ITMs, ETMs,
BS, PRM and SRM were measured under the vacuum-condition.
The attachment are measured spectra. |
|
2433
|
Sun Dec 20 14:34:24 2009 |
Koji | Update | SUS | ETMY watchdog tripped Sunday 5:00AM local | It seemed that the ETMY watchdog tripped
early Sunday morning.
The reason is not known. I just looked |
|
2457
|
Mon Dec 28 12:35:57 2009 |
Jenne | Update | SUS | MC2 is having a bad day | MC2 is having a bad day, and I'm not yet
sure why. It's to do with the damping
though. When the damping is off, after |
|
2458
|
Mon Dec 28 12:45:55 2009 |
Koji | Update | SUS | MC2 is having a bad day | The MCL path of MC2 was in a strange state
as the filters were activated as if it is
in lock even though we had no lock. So I |
|
2494
|
Sun Jan 10 13:32:09 2010 |
Haixing | Update | SUS | transfer function measurement of the quadrant maglev circuit | I have assembled the circuit and the
control box for the quadrant magnetic
levitation yesterday. The final setup |
6x |
2495
|
Sun Jan 10 15:47:26 2010 |
Koji | Update | SUS | transfer function measurement of the quadrant maglev circuit | 1. Why do all of the BNCs have no GND connection?
Each should have the individual cables to
the ground. Each signal line and the corresponding |
|
2497
|
Sun Jan 10 16:50:34 2010 |
Haixing | Update | SUS | transfer function measurement of the quadrant maglev circuit |
|
|
2498
|
Sun Jan 10 17:15:25 2010 |
Koji | Update | SUS | transfer function measurement of the quadrant maglev circuit | 1. Yes. That is the bad. You should eventually
replace the BNCs to the isolated ones.
2. OK. I like to emphasize again |
|
2510
|
Tue Jan 12 13:24:50 2010 |
Haixing | Update | SUS | Quadrant Magnetic Levitation | I have tried to make the quadrant magnetic
levitation work but unfortunately I did
not succeed. During the experiment, I |
|
2574
|
Fri Feb 5 14:31:46 2010 |
Jenne | Update | SUS | 2 SOS towers assembled | [Jenne, Kiwamu]
The 2 SOS towers for the ITMs have
been assembled, and are on the flow bench |
|
2641
|
Thu Feb 25 19:59:50 2010 |
Koji | Configuration | SUS | ITMX OSEMs | Koji, Steve
ITMX OSEM CONFIGURATION
|
|
2651
|
Tue Mar 2 23:11:43 2010 |
Koji | Update | SUS | ITMX hung | Jenne and Koji
We successfully hung ITMX on the
SOS. Side magnet is ~2mm off from the center |
|
2652
|
Wed Mar 3 02:57:29 2010 |
Jenne | Update | SUS | ITMX hung |
|
|
2658
|
Fri Mar 5 11:21:18 2010 |
steve | Update | SUS | used OSEMs are magnetic |
|
|
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 |
|
2668
|
Thu Mar 11 17:51:04 2010 |
Koji | Update | SUS | Recent status of SOSs | Jenne, Koji
Recent status of SOSs:
|
|
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. |
  |
2717
|
Sat Mar 27 16:23:10 2010 |
Koji | Update | SUS | another SRM sidemagnet glued | Kiwamu and Koji
Last night we have released PRM from
the gluing fixture. All of the six magnets |
|
2730
|
Mon Mar 29 18:41:34 2010 |
Koji | Configuration | SUS | Started to build TTs | Steve and Koji
WE started to build 5 TTs. 4 of them
are used in the recycling cavities. One is |
|
2731
|
Mon Mar 29 18:50:14 2010 |
Koji | Update | SUS | PRM sidemagnet glued | PRM was released from the fixuture without
any trouble. This was the last magnet gluing
until ETMs are delivered. |
|
2753
|
Thu Apr 1 17:35:24 2010 |
Koji | Update | SUS | Working on ITMX/Y | Steve and Koji
- We removed old ITMX/Y from the
chambers. Now they are temporarily placed |
|
2766
|
Mon Apr 5 09:48:57 2010 |
Koji | Update | SUS | ITMs placed on the tables in the chambers | Steve and Koji (Friday, Apr 02)
Summary
Intsallation of ITMs are going on. |
|
2769
|
Mon Apr 5 11:39:41 2010 |
steve | Update | SUS | ITM-south installation |
|
|
2773
|
Mon Apr 5 14:10:06 2010 |
steve | Update | SUS | sus damping restored |
|
|
2777
|
Tue Apr 6 22:54:34 2010 |
Koji | Update | SUS | ITMY (south) aligned | Kiwamu and Koji
ITMY
(south) was aligned |
|
2796
|
Mon Apr 12 22:51:31 2010 |
Koji | Update | SUS | ITMX installed and aligned | Koji
ITMX
was aligned |
|
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 |
|
2813
|
Tue Apr 20 08:00:52 2010 |
steve | Update | SUS | ETMY damping restored | ETMY sus damping was restored |
|
2848
|
Mon Apr 26 21:12:53 2010 |
Koji | Update | SUS | PRM/SRM standoffs glued | Kiwamu and Koji
The PRM/SRM were balanced with the
standoffs. We glued them to the mirror. |
|