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| ==== Past week report ==== At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): |
==== Report for week of 1/29 ==== * Fabian and Kozu-kun tested the FR stepper, and calibrated the keystone height as a function of FR position. * Fabian, Hirata-san and Kozu-kun installed and adjusted the IRM, IM OSEMs and associated cables. * Mark derived the diagonalization matrices for SR, posted them as [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7663| T1807663]] and entered them in the on-line system. * Mark fixed the GASALL screen, which had some elements hardwired to BS and did not work for SR2. * Mark initialized the watchdog section of the SR2 model (filters, thresholds etc). * Mark re-entered the IM OSEM2EUL offsets and gains, which had been entered by Enzo, but had not been saved and had been lost. * Mark identified and fixed a bug in the SF2 whereby the watchdog trigger was derived from the AND of the error signals from the various stages instead of the OR. Thus all stages would have to overload before the watchdog tripped. All other VIS models were similarly affected, and all affected library parts have been fixed, but the other models need to be rebuilt, which should be done at the earliest opportunity, e.g., early next week after the scheduled power outage on Sun 2/18. * Mark fixed the indicators for the watchdog on the OVERALL screen, which also had bad logic. * Mark tried using Shoda-san's measurement script to do TFs. It ran successfully, but the first data set was no good because of two issues: the excitation was apparently too large (even after a reduction by 20) and the SENSALIGN matrix was not initialized. * Hirata-san negotiated with Kimura-san to get the SRM tank mushroom installed (this will probably happen from Tue on the week of 3/5). |
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| * Filed crane adapter ring to make it fit better on the hook. * Debugged the BF and SF LVDTs (the signal generator had lost its settings in the rack shutdown). * Debugged the TM-H4 OSEM problem (a "Type 3 extension cable had gone bad). * Weighed eyebolts used to lie the SF. * Shipped the old pico driver and joystick back to Mitaka for Eleonora. * Borrowed a second pico driver ("PR3") and set it and "BS" up in the rack. * Practiced driving the BF cap picos with the new drivers. * (With help from Miyo-kun) got the pico MEDM screens running. * Replace the temporary "PR3" driver with a new one "BS_BF", and renamed "BS" to "BS_IM". * Checked all the DIO connections to the LPCD and connected up the HPCDs. With help from Kokeyama-san we can now see all the drivers from EPICS. * Worked on balancing the BF/IRM/IM... section. Sometime during this work, the IM sank and would not come back to its proper position even with the fishing rod. We put a scale under the RM and found that the imbalance was 488 g. Using the fishing rod we got this down to 235 g, but we found that the direction of the stepper was not consistently related to the direction selected on the driver screen - we had previously noted that "left" was "up, but driving "up" the imbalance would decrease to 235 g and then start increasing again, indicating the stepper had bounced off some obstacle. (There was no obvious sound when this happened, unlike at the low end.) * We decided to give up on tuning the height of the IM with the fishing rod and to proceed with the test hang by locking the BF keystone at the desired height. * Hirata-san installed the PI fishing rod and magic wand, and did more work on changing the PI LVDT connectors from female to male. * Enzo made many edits to the circuit diagram, adding the DIO for the HPCDs and correcting minor mistakes. |
==== Plan for week of 2/19 ==== * Shoda-san at Mitaka. * Hirata-san at Mitaka Mon+Tue (to receive and wash parts), then Kamioka Wed-Fri. * Enzo back from Tuesday, at Kamioka. * Kozu-kun at Kamioka but limited availability (preparing poster). * All others at Kamioka. * - * Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw. * Sort out cables per Enzo's master plan. * Lift BF/... section and check total mass and balance. * Cable and test BF picos. * Add section of SS up to SF ring. * Bring in SF. * Hook BF/... section. * Route cables up to under SF. * Check/adjust total mass of BF/... section. |
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| ==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. |
==== Plan for week of 2/26 ==== * Shoda-san at Mitaka. * - * Add Cu segments to SF cap. * Lift SF/... section and check total mass and balance. |
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| Week of 4/17: * Install temporary ballast mass in SF. * Lift SF/BF/... section and check total weight and SF balance. * Continue swap of PI LVDT connectors (female->male) * Start preparing LBB spring units. Week of 4/24: * Crane in PI. * Connect SF/BF... section. * Temporarily remove PI and adjust SF ballast if necessary. |
==== Plan for week of 3/5 ==== * Shoda-san at Mitaka. * Hirata-san vacation Mon 3/5, then Kamioka * Others at Kamioka. * - * Get SRM tank mushroom section installed (Hirata-san, Kimura-san) ==== Plan for week of 3/12 ==== * Shoda-san at Mitaka. * Mark at ASJ (Chiba) Fri 3/16. * Hirata-san vacation Mon 3/5, then Kamioka ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/March2018]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]] ==== Vacation Info ==== * Enzo 1/30-2/19. * Hirata-san vacation Mon 3/5 * Fabian 4/2-4/27 vacation (then gone). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 1/29
- Fabian and Kozu-kun tested the FR stepper, and calibrated the keystone height as a function of FR position.
- Fabian, Hirata-san and Kozu-kun installed and adjusted the IRM, IM OSEMs and associated cables.
Mark derived the diagonalization matrices for SR, posted them as T1807663 and entered them in the on-line system.
- Mark fixed the GASALL screen, which had some elements hardwired to BS and did not work for SR2.
- Mark initialized the watchdog section of the SR2 model (filters, thresholds etc).
- Mark re-entered the IM OSEM2EUL offsets and gains, which had been entered by Enzo, but had not been saved and had been lost.
- Mark identified and fixed a bug in the SF2 whereby the watchdog trigger was derived from the AND of the error signals from the various stages instead of the OR. Thus all stages would have to overload before the watchdog tripped. All other VIS models were similarly affected, and all affected library parts have been fixed, but the other models need to be rebuilt, which should be done at the earliest opportunity, e.g., early next week after the scheduled power outage on Sun 2/18.
- Mark fixed the indicators for the watchdog on the OVERALL screen, which also had bad logic.
- Mark tried using Shoda-san's measurement script to do TFs. It ran successfully, but the first data set was no good because of two issues: the excitation was apparently too large (even after a reduction by 20) and the SENSALIGN matrix was not initialized.
- Hirata-san negotiated with Kimura-san to get the SRM tank mushroom installed (this will probably happen from Tue on the week of 3/5).
Plan for week of 2/19
- Shoda-san at Mitaka.
- Hirata-san at Mitaka Mon+Tue (to receive and wash parts), then Kamioka Wed-Fri.
- Enzo back from Tuesday, at Kamioka.
- Kozu-kun at Kamioka but limited availability (preparing poster).
- All others at Kamioka.
- -
- Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.
- Sort out cables per Enzo's master plan.
- Lift BF/... section and check total mass and balance.
- Cable and test BF picos.
- Add section of SS up to SF ring.
- Bring in SF.
- Hook BF/... section.
- Route cables up to under SF.
- Check/adjust total mass of BF/... section.
Plan for week of 2/26
- Shoda-san at Mitaka.
- -
- Add Cu segments to SF cap.
- Lift SF/... section and check total mass and balance.
Plan for week of 3/5
- Shoda-san at Mitaka.
- Hirata-san vacation Mon 3/5, then Kamioka
- Others at Kamioka.
- -
- Get SRM tank mushroom section installed (Hirata-san, Kimura-san)
Plan for week of 3/12
- Shoda-san at Mitaka.
- Mark at ASJ (Chiba) Fri 3/16.
- Hirata-san vacation Mon 3/5, then Kamioka
To-Do Lists, Schedule
Vacation Info
- Enzo 1/30-2/19.
- Hirata-san vacation Mon 3/5
- Fabian 4/2-4/27 vacation (then gone).