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| '''Summary''': Akutsu-san found the optical lever light hits on the edge of the MCE mirror during his investigation on IMC ghost beams. We need to re-schedule to work on IMC suspension for this problem and also other issues. Please discuss it later. | '''Summary''': Akutsu-san found the optical lever light hits on the edge of the MCE mirror during his investigation about IMC ghost beams. We need to re-schedule to work on IMC suspension for this problem and also other issues reported in [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15916|15916]]. Please discuss it later. |
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| (1) Miyo fixed the swapped cabling on the BF-damper for PRM with Nakagaki-san, and after that, the noise coupling of the transfer function at higher frequency is decreased to the same behavior of other PR suspensions (15994). | (1) Miyo fixed the swapped cabling on the BF-damper for PRM with Nakagaki-san, and after that, the noise coupling of the transfer function at higher frequency is decreased to the same behavior of other PR suspensions (15994). By the way, the same noise coupling was reported in Type-A suspension [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12678|12678]]. Is it caused by the same error? |
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| * [Miyo] Please write klog entry as a comment if it is related work to other entry. If you do so, it is very helpful to find whether the work is done or not. For example, it is difficult to understand if the bug report on [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12678|klog#12678]] was resolved or not. |
Contents
Agenda/Minutes on 2021/2/12
CRY+VIS Interface Meeting
13:30-
Participants:
- Schedule for IX: Release is scheduled on 2/18.
- Schedule for IY: Disconnection is scheduled on 3/11.
- Schedule for EX: Connection is scheduled in the week of 3/15.
- Corrugate tube fixing jig: Re-measurement is planed in 2/26-3/1 at IYV.
- Commissioning in air:
- Commissioning in vacuum:
- Acceptance check: Cryo-payload in IX and Type-A tower in EY are on going.
- PF actuator: Dead line depends on the schedule of commissioning.
- Jig for FC painting: Delivered.
VIS Meeting
14:00-
Participants:
Activities in this week
VIS/General
Summary: Ikeda-san worked on following items;
(1) He measured the length of the network cable (15956), and now is preparing to order all cables we need with DGS group help.
(2) He got message from manufacturer that it is difficult to operate the picomotor for long time (more 24 hours). (15958). So he is now considering to request AEL group to make the circuit box that turns power on and off with BIO signal like the stepper motor circuit.
(3) He made the new MEDM screen for stepper motor on MN stage which is developed by Nishimoto-kun. We can open the screen from [sitemap]/[STEPPING MOTOR]/[CRY_OVERVIEW] (15965).
15737 We investigated the network connection. , satoru.ikeda
15956 Comment, satoru.ikeda
15958 About Picomotor's 24-hour operation , satoru.ikeda
15965 Integration of Cryo Payload Phytron motor driver into MEDM , satoru.ikeda
15983 I posted this by mistake. , satoru.ikeda
VIS/EY
Summary: Setup of the F2 stage in EY: installation of suspension wire, cabling, calibration of LVDT, check of FR range, tuning
15950 Setup of F2 , ryutaro.takahashi
15982 Setup of F2 , ryutaro.takahashi
Thursday 15993 Setup of F2 , ryutaro.takahashi 15959 Connection between F3 and F2 , naohisa.satou
15972 Cabling between F3 and F2 , naohisa.satou
VIS/IX
Summary: Connection of the cryo-payload in IX, mounted the geophones onto the IP in IX, and compressed the F0 blades in IX.
15968 Connection to cryo-payload , ryutaro.takahashi
15974 Comment, ryutaro.takahashi
15968 Connection to cryo-payload , ryutaro.takahashi
15981 Setup of pre-isolator , ryutaro.takahashi
VIS/MCE
Summary: Akutsu-san found the optical lever light hits on the edge of the MCE mirror during his investigation about IMC ghost beams. We need to re-schedule to work on IMC suspension for this problem and also other issues reported in 15916. Please discuss it later.
15987 MCe oplev , tomotada.akutsu
VIS/PRM
Summary:
(1) Miyo fixed the swapped cabling on the BF-damper for PRM with Nakagaki-san, and after that, the noise coupling of the transfer function at higher frequency is decreased to the same behavior of other PR suspensions (15994). By the way, the same noise coupling was reported in Type-A suspension 12678. Is it caused by the same error?
(2) Ikeda-san touched the picomotor of PRM for his first operation (15957) before measure the calibration factor between picomotor and OSEM.
9449 PRM glitch investigation: , koki.okutomi
15957 Checking the operation of PRM's Picomotor PRM_BF and PRM_IM , satoru.ikeda
VIS/PR3
Summary: Ikeda-san tested the picomotor operation and measured rough calibration value for PR3-IM picomotor (15977). During the test for BF picomotor, it was stucked (15976). So we need open the top chamber to fix that.
15977 PR3 IM PITCH, ROLL, YAW's Picomotor is operated to measure the travel and drive range , satoru.ikeda
15976 Picomotor of PR3_BF_T(Motor2) got stuck , satoru.ikeda
15979 Comment, satoru.ikeda
VIS/SR3
Summary: Could you summarize? Fabian?
15928 Oplev installation and alignment recovery. , fabian.arellano
15953 Comment, fabian.arellano
15963 IM ballast mass adjustment , fabian.arellano
Progress report
General
[Miyo] See Activities/General
Type-A
Type-B
[Fabian?] See SR3
Type-Bp
Type-C
[Miyo] See MCE
Controls
No update.
Electronics
????
Towards O4
- Type-B/Bp remedy work is on going.
- Installation of Type-A is on going in EY.
- Schedule.
- Procedure documents.
- Criteria in the acceptance test.
Safety
Discussion
[Ikeda] How to rescue the stucked picomotor named BF-T for PR3. klog#15976
[Miyo] When and who work on the IMC repairing? This work is not included in the VIS schedule.
[Miyo] Please write klog entry as a comment if it is related work to other entry. If you do so, it is very helpful to find whether the work is done or not. For example, it is difficult to understand if the bug report on klog#12678 was resolved or not.
- Do you have?
Travel Plans
The week from 2/15
- Takahashi: 2/15-19
- Sato: 2/15-19
- Hirata: 2/15-19
- Yano: 2/15-19
The week from 2/22
- Takahashi: 2/23-26
- Sato: 2/22-26
- Hirata: 2/23-26
- Yano: 2/22-26
Next meeting
- On 2020/2/19(Fri)