| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4022
|
Tue Dec 7 18:37:15 2010 |
Suresh | Update | SUS | ETMU05 ready for baking | The ETMU05 has been removed
from the suspension and put into
the little foil house. |
|
|
4092
|
Thu Dec 23 08:54:32 2010 |
Suresh | Update | elog | the delhi univ syndrome | Sorry folks! I couldnt get to the
elog and didnt know that the elog was crashing
every time I tried to access it. |
|
|
4106
|
Tue Jan 4 15:12:33 2011 |
Suresh | Update | IOO | MC Trans Mon QPD gain decreased by 10 | Decreased
the gain of MC-Trans-Mon QPD ckt
The |
|
|
4137
|
Tue Jan 11 17:08:43 2011 |
Suresh | Configuration | PSL | replaced the pzt-steering mirror on PSL | [Rana,
Jenne, Suresh]
Yesterday, |
|
|
4143
|
Wed Jan 12 17:22:47 2011 |
Suresh | Configuration | Locking | MC demod phase adjusted to minimise the I output | [Koji, Suresh]
We wanted to check and make sure
that the relative phase of the two inputs |
|
|
4147
|
Wed Jan 12 22:39:16 2011 |
Suresh | Update | IOO | Put MC PZT offset onto MC board, instead of on awkward cart |
|
|
|
4161
|
Sun Jan 16 02:20:59 2011 |
Suresh | Update | Locking | comparing the PSL with the X-end-NPRO through the green beat | Objective:
We
wish to study the coherence of the two NPROs |
|
|
4166
|
Wed Jan 19 03:37:30 2011 |
Suresh | Update | Locking | comparing the PSL with the X-end-NPRO through the green beat |
[Kiwamu, Suresh] |
|
|
4187
|
Sat Jan 22 01:56:04 2011 |
Suresh | Update | Green Locking | Examining the stability of VCO PLL at low frequencies | [Kiwamu,
Suresh, Rana]
Our |
|
|
4225
|
Sat Jan 29 00:31:05 2011 |
Suresh | Update | General | Vertex crane upgrade completed | The
Vertex crane is smarter and safer now. |
6x |
|
4243
|
Thu Feb 3 04:43:58 2011 |
Suresh | Update | Electronics | Added two new DAQ channels | [Suresh, Joe]
We added the following two new DAQ
channels into the c1:GCV model. The |
|
|
4248
|
Fri Feb 4 11:10:27 2011 |
Suresh | Update | Green Locking | VCO PLL Frequency noise | This measurement pertains to the BL2002
VCO PLL unit.
|
|
|
4266
|
Wed Feb 9 23:48:12 2011 |
Suresh | Configuration | Cameras | Video Cable work: New Labels | [Larisa, Aidan,Steve,Suresh]
Today was the first
session for implementing the new video cabling |
|
|
4272
|
Fri Feb 11 00:20:58 2011 |
Suresh | Update | Electronics | REFL11: Photodiode requires replacement |
This is with reference to Kevin and
Jenne's elogs # 3890, |
|
|
4275
|
Sat Feb 12 08:08:05 2011 |
Suresh | Update | Electronics | REFL11 Photodiode replaced | A new photodiode ( Perkin and Elmer Model
no. C30642GH Sl No.1526) has been installed
in the place of the old photodiode. |
|
|
4279
|
Sun Feb 13 16:20:53 2011 |
Suresh | Update | Electronics | REFL11 Photodiode replaced | It is 0.375 mW as in the calculation.
The total diode output is just 1mW and it
is divided with a 50/50 beam splitter... |
|
|
4284
|
Mon Feb 14 07:37:13 2011 |
Suresh | Update | Electronics | RF Generation Box: capacitors across power lines |
There were several parts in this
box which did not have shunting capacitors |
|
|
4285
|
Mon Feb 14 07:58:43 2011 |
Suresh | Update | CDS | Today's CDS problems |
I am concentrating on the
RF system just now and will be attending |
|
|
4296
|
Tue Feb 15 06:15:07 2011 |
Suresh | Update | ASC | no signal from IP_ANG_Seg1 | [Valery, kiwamu, Jenne, Suresh]
I first interchanged
the two QPD's on the Y end table to see if |
|
|
4314
|
Thu Feb 17 13:20:06 2011 |
Suresh | Update | VIDEO | Some more labels | [Larisa, Kiwamu, Steve and Suresh]
We continued the labeling |
|
|
4315
|
Thu Feb 17 14:17:27 2011 |
Suresh | Update | Electronics | RF Distribution box and REFL11 |
The Distribution box is several steps
nearer to completion. |
|
|
4330
|
Sat Feb 19 05:25:20 2011 |
Suresh | Update | Electronics | RF: Distribution box | Most of the RF cables required for the
box are done. There are two remaining
and we will attend to these tonight. |
|
|
4336
|
Tue Feb 22 00:41:34 2011 |
Suresh | Update | Electronics | RF Distribution box: assembly completed | The mechanical assembly of RF distribution
box is 99% complete. Some of the components
may be bolted to the teflon base plate if |
|
|
4342
|
Wed Feb 23 08:53:58 2011 |
Suresh | Update | Electronics | RF Distribution box: Output power levels | We wish to have roughly 2 dBm of output
power on each line coming out of the RF distribution
box. So I adjusted the attenuators |
|
|
4377
|
Fri Mar 4 09:47:46 2011 |
Suresh | Update | Electronics | Harmonic distortion calculations for RF distribution box |
Fast work indeed! It would be nice
if we could have the following details filled |
|
|
4416
|
Fri Mar 18 17:55:58 2011 |
Suresh | Configuration | Green Locking | Work Plan for Y-end Aux laser installation | A rough
time-table and the various tasks are given
below: |
|
|
4436
|
Thu Mar 24 01:16:19 2011 |
Suresh | Summary | Green Locking | Y-END green equipment is all available | There was a 2" mirror mount among the spares
on the PSL table. It has a window LW-3-2050
UV mounted in it. I
|
|
|
4459
|
Wed Mar 30 02:55:02 2011 |
Suresh | Configuration | Electronics | RF System : Status and Plans | I have prepared several diagrams outlining
the current state of the RF System.
These are uploaded into the svn40m |
|
|
4474
|
Thu Mar 31 08:31:44 2011 |
Suresh | Update | VIDEO | Cable laying...continued | The video work has crossed a milestone.
Kiwamu and Steve have shifted the
three quads from the control room to |
|
|
4503
|
Fri Apr 8 01:05:45 2011 |
Suresh | Update | RF System | RF Source Harmonics |
The measured power levels of
the RF source harmonics are given below: |
|
|
4511
|
Mon Apr 11 19:09:59 2011 |
Suresh | Update | RF System | Installed low pass filters in the demod boards |
As part of the RF system upgrade
some of the demod boards in the lab were |
|
|
4547
|
Wed Apr 20 21:53:01 2011 |
Suresh | Configuration | RF System | RF system: Stray heliax cable | We found a stray unused heliax |
|
|
4557
|
Fri Apr 22 09:05:53 2011 |
Suresh | Update | RF System | RF Source Harmonics |
As seen in the previous measurement the first
harmonic of both the 11 MHz and 55 MHz outputs |
|
|
4558
|
Fri Apr 22 09:25:43 2011 |
Suresh | Update | RF System | RF Source: Temperature sensor relocated | RF Amp operating temperature
Earlier measurement reported by Alberto
in LIGO-T10004-61-v1 based on the LM34 temperature |
|
|
4578
|
Thu Apr 28 06:46:30 2011 |
Suresh | Update | RF System | RF Source installed | RF Source
box has been mounted in the 1X2 rack. |
|
|
4579
|
Thu Apr 28 07:14:34 2011 |
Suresh | Update | RF System | RF Distribution box installed | RF Distribution box has been mounted in
the 1Y2 rack and is ready for use.
|
|
|
4591
|
Fri Apr 29 18:24:05 2011 |
Suresh | Update | RF System | RF system: 1X2 Rack cabling | [Joe, Jamie, Suresh]
We have installed the IDE to SCSI
adaptor module into the 1X2 rack and have |
|
|
4602
|
Mon May 2 23:29:57 2011 |
Suresh | Update | Electronics | too loose Heliax connectors on 1Y2 rack | The countersink
gives rise to another problem when we mount
the N-type-to-SMA bulkhead adaptor. |
|
|
4621
|
Wed May 4 11:48:01 2011 |
Suresh | Update | IOO | MC Locking not working | [Valera, Suresh]
The first time I noticed that the
MC was not locking was after I had finished |
|
|
4622
|
Wed May 4 12:07:48 2011 |
Suresh | Update | RF System | REFL55 installed on the AP table | REFL55
has been installed on the AP table.
REFL11 has been moved to make space for a |
|
|
4628
|
Wed May 4 15:39:32 2011 |
Suresh | Update | RF System | RF Source Harmonics |
I have measured the RF source harmonics in |
|
|
4650
|
Fri May 6 06:36:18 2011 |
Suresh | Update | RF System | PD DC signals at each port connected | We now
have the DC signal from three PDs available
in the ADC channels 14,15 and 16. The |
|
|
4657
|
Sat May 7 10:59:11 2011 |
Suresh | Update | RF System | RF Source filters changed |
The
SLP-50 filters which were on the 55 MHz lines |
|
|
4670
|
Mon May 9 17:23:25 2011 |
Suresh | Update | RF System | RF Cables near LSC Rack | [Steve, Suresh]
We started to clean up the RF cables
(heliax and PD interface cables) at |
|
|
4675
|
Tue May 10 01:39:41 2011 |
Suresh | Update | RF System | RF source troubles | Today after Steve and I finished the RF
cabling work for the day, Kiwamu noticed
that there were no RF signals to be seen. |
|
|
4698
|
Thu May 12 02:31:07 2011 |
Suresh | Update | RF System | installation of RF splitters in Demod boards | [Jamie, Koji, Suresh]
We replaced splitters in several
demod boards as per the table given below: |
|
|
4703
|
Thu May 12 16:50:22 2011 |
Suresh | Update | RF System | installation of RF splitters in Demod boards | We have no plan to change the AS11 PD.
I was referring to the AS11 Demod board
which currently has the "Demodulator |
|
|
4708
|
Thu May 12 23:50:10 2011 |
Suresh | Update | RF System | POY55_Demod board Hardware change completed | The Demod board with S. No. 022 (being
used earlier as REFL11) has been modified.
It now has SCLF-65 as its input LP filter |
|
|
4711
|
Fri May 13 01:51:56 2011 |
Suresh | Update | RF System | RF Status update | I have posted the attached RF status update
and 1Y2 rack layout to the svn. |
|
|
4714
|
Fri May 13 22:45:37 2011 |
Suresh | Update | RF System | The full set of 8 Demod boards is ready for testing | We have Completed the hardware changes
to the full set of 8 demod boards.
The last one completed today is AS11. |
|