|
Size: 1664
Comment:
|
← Revision 39 as of 2016-07-25 10:30:07 ⇥
Size: 5354
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 1: | Line 1: |
| = ISC Meeting on 2016/6/13 = 2016/5/16 14:00 - 15:00 |
= ISC Meeting on 2016/6/13 14:00 - 15:00 = |
| Line 4: | Line 3: |
| Participants: | eZuce: http://srn.ezuce.com/joinSRN?meeting=MvM2Ml2I2BDIDI9I98De9v Participants: Y. Michimura, K. Arai, E. Hirose, H. Yamamoto, T. Akutsu, K. Kokeyama, Y. Aso == Minutes == * Members updated: [[KAGRA/Subgroups/MIF/Members|Members]] * bKAGRA Phase 1 optical configuration study * Motivation for 3-km PRMI? * To check RoC and positions of PR mirrors * Even if PR2/3 are shifted by 1 cm each * Independent measurement of RoC with a mirror alone should be done also * '''Check if reference spheres for PR mirrors are available at Caltech [Hirose] ''' * It's not easy to measure the RoC since we don't have reference spheres * Situation is even worse for IMMT1/2 * To make 3-km long cavity to do FSS and to attract people * '''Check if IMC length stability and others are compatible with 3-km PRMI [Michimura]''' * To check thermal state of mirrors * Is dummy payload feasible? * ETM dummy payload is a single pendulum without any actuators (being prepared by VIS Type-A team) * Yaw could be damped with actuators on the last bottom filter, but not pitch * ''' Check if dummy payload is quiet enough to make PRMI [Michimura]''' * ''' Continue checking dummy ETM availability [Hirose]''' * Dummy ETM should be suspended in the way that we can reuse them afterwards * bKAGRA Phase 1 initial alignment / commissioning plan * Time it takes to check suspension performance not included in the plan * Possibility of faster CRYp instead of making dummy payload? * bKAGRA Phase 1 analog electronics request for AEL * '''Request to AEL [Michimura]''' * '''Assign people to modify/produce some of the electronics [Michimura] ''' * Quad IQ Demodulator heat-up issue * Remake IQ Demodulator LSC to ASC for IMC WFS * Assemble RF Distribution Amplifier * RF Patch Panel modification * '''Announce Optickle seminar to broader community [Michimura]''' |
| Line 7: | Line 39: |
| === High priority === | |
| Line 10: | Line 41: |
| * bKAGRA phase 1 optical configuration study [Aso] | * bKAGRA Phase 1 optical configuration study [Aso]: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=5199|JGW-G1605199]] |
| Line 15: | Line 46: |
| * initiated Optickle 2 modeling: [[https://granite.phys.s.u-tokyo.ac.jp/trac/LCGT/browser/trunk/mif/KAGRAOptickle/bKAGRAPhase1/|KAGRAOptickle SVN]] (use JGWDoc ID/PW to login) | * initiated Optickle 2 modeling: [[https://granite.phys.s.u-tokyo.ac.jp/trac/LCGT/browser/trunk/mif/KAGRAOptickle/bKAGRAPhase1/|KAGRAOptickle SVN]] (login required) * Optickle (Optickle2) seminar on July 1 [[http://densuke.biz/list?cd=bNJ9WSPSEQNxheCy|densuke]] |
| Line 18: | Line 50: |
| * bKAGRA phase 1 commissioning plan [Michimura] * document posted later |
* bKAGRA Phase 1 initial alignment / commissioning plan [Michimura]: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=5274|JGW-T1605274]] * 4 months (2017.6-9) for 300 K PRMI with dummy payload, 1 week (2018.1) for CRYp PRMI before cooling down * seems like we have enough time for ISC (but no margin) * everything should be ready by 2017.5, and most of the commissioning should be done by 2017.10 * bKAGRA Phase 1 analog electronics request for AEL ([[KAGRA/Subgroups/MIF/AEL|Analog Electronics for ISC]]) [Michimura] * Quad IQ Demodulator LSC: 7 for full bKAGRA (5 in stock) * is heating problem solved? [AEL] * Quad IQ Demodulator ASC: 22 for full bKAGRA (0 in stock) * RF Distribution Amplifier: 10 for full bKAGRA (1 handmade in stock) * DC QPD Interface: 8 (+ AOS) for full bKAGRA (20 in stock) -> OK * Frequency Doubler: 2 for full bKAGRA (0 in stock) * Common Mode Servo Board?: 4 for full bKAGRA (1 in stock) * could be used for FSS using PRCL * slow output too noisy, Excitation B OUT 2 is strange, power switch * RF Patch Panel modification (too thick to fasten nuts) [Miyo?] * RF PD modification (Dsub 9pin won't fix tight, breaks easily with single power supply) [Doi?] * single-ended to differential, differential to single-ended: 10 each being prepared by AEL -> OK |
| Line 21: | Line 68: |
| == Less priority == | ----- |
| Line 30: | Line 78: |
| * Mirror absorption measurement status (if any) [Hirose] | * Viewport quality for GV between SRM and OMMT [Akutsu] * bKAGRA ISC cabling [Michimura/Doi] * Doi-san said he will help. * Mirror absorption measurement status [Hirose] * OMC status [Somiya] * Magnetic noise, actuator noise calculation for cryogenic payload [Michimura] * Task list update ([[KAGRA/Subgroups/MIF/TaskList|TaskList]]) [Michimura] == Next meeting == 2016/6/27 14:00 - 15:00 |
ISC Meeting on 2016/6/13 14:00 - 15:00
eZuce: http://srn.ezuce.com/joinSRN?meeting=MvM2Ml2I2BDIDI9I98De9v
Participants: Y. Michimura, K. Arai, E. Hirose, H. Yamamoto, T. Akutsu, K. Kokeyama, Y. Aso
Minutes
Members updated: Members
- bKAGRA Phase 1 optical configuration study
- Motivation for 3-km PRMI?
- To check RoC and positions of PR mirrors
- Even if PR2/3 are shifted by 1 cm each
- Independent measurement of RoC with a mirror alone should be done also
Check if reference spheres for PR mirrors are available at Caltech [Hirose]
- It's not easy to measure the RoC since we don't have reference spheres
- Situation is even worse for IMMT1/2
- To make 3-km long cavity to do FSS and to attract people
Check if IMC length stability and others are compatible with 3-km PRMI [Michimura]
- To check thermal state of mirrors
- To check RoC and positions of PR mirrors
- Is dummy payload feasible?
- ETM dummy payload is a single pendulum without any actuators (being prepared by VIS Type-A team)
- Yaw could be damped with actuators on the last bottom filter, but not pitch
Check if dummy payload is quiet enough to make PRMI [Michimura]
Continue checking dummy ETM availability [Hirose]
- Dummy ETM should be suspended in the way that we can reuse them afterwards
- ETM dummy payload is a single pendulum without any actuators (being prepared by VIS Type-A team)
- Motivation for 3-km PRMI?
- bKAGRA Phase 1 initial alignment / commissioning plan
- Time it takes to check suspension performance not included in the plan
- Possibility of faster CRYp instead of making dummy payload?
- bKAGRA Phase 1 analog electronics request for AEL
Request to AEL [Michimura]
Assign people to modify/produce some of the electronics [Michimura]
- Quad IQ Demodulator heat-up issue
- Remake IQ Demodulator LSC to ASC for IMC WFS
- Assemble RF Distribution Amplifier
- RF Patch Panel modification
Announce Optickle seminar to broader community [Michimura]
Agenda
- MIF membership [Michimura]
members replied: Members
bKAGRA Phase 1 optical configuration study [Aso]: JGW-G1605199
BS angle changes slightly (0.0187 deg) -> OK
beam spot on PR3 shifts by 5 mm -> OK
move PR2 and PR3 1 cm each to stabilize PRC -> OK
HOM structure / LSC / ASC check -> to be done [Michimura]
initiated Optickle 2 modeling: KAGRAOptickle SVN (login required)
Optickle (Optickle2) seminar on July 1 densuke
room temperature ETM availability -> ? [Hirose]
- any others?
bKAGRA Phase 1 initial alignment / commissioning plan [Michimura]: JGW-T1605274
- 4 months (2017.6-9) for 300 K PRMI with dummy payload, 1 week (2018.1) for CRYp PRMI before cooling down
- seems like we have enough time for ISC (but no margin)
- everything should be ready by 2017.5, and most of the commissioning should be done by 2017.10
bKAGRA Phase 1 analog electronics request for AEL (Analog Electronics for ISC) [Michimura]
- Quad IQ Demodulator LSC: 7 for full bKAGRA (5 in stock)
- is heating problem solved? [AEL]
- Quad IQ Demodulator ASC: 22 for full bKAGRA (0 in stock)
- RF Distribution Amplifier: 10 for full bKAGRA (1 handmade in stock)
DC QPD Interface: 8 (+ AOS) for full bKAGRA (20 in stock) -> OK
- Frequency Doubler: 2 for full bKAGRA (0 in stock)
- Common Mode Servo Board?: 4 for full bKAGRA (1 in stock)
- could be used for FSS using PRCL
- slow output too noisy, Excitation B OUT 2 is strange, power switch
- RF Patch Panel modification (too thick to fasten nuts) [Miyo?]
- RF PD modification (Dsub 9pin won't fix tight, breaks easily with single power supply) [Doi?]
single-ended to differential, differential to single-ended: 10 each being prepared by AEL -> OK
- Quad IQ Demodulator LSC: 7 for full bKAGRA (5 in stock)
- bKAGRA optical layout around PRC [Aso]
- POY beam is clipped by PR3 optical bench suspension wire
JGW-T1605261 (cartoon)
- iKAGRA post-run calibration mystery [Aso]
- mysterious LPF was probably from saturation (is this end of the story?)
Miyo-kun did time delay fitting: Jupyter Notebook, Files in Dropbox
- Requirement for the noise of watchdogs for coil drivers [Aso]
- Viewport quality for GV between SRM and OMMT [Akutsu]
- bKAGRA ISC cabling [Michimura/Doi]
- Doi-san said he will help.
- Mirror absorption measurement status [Hirose]
- OMC status [Somiya]
- Magnetic noise, actuator noise calculation for cryogenic payload [Michimura]
Task list update (TaskList) [Michimura]
Next meeting
2016/6/27 14:00 - 15:00