= Agenda/Minutes of the VIS Meeting on 2017/4/21 = 2017/4/21 13:30 - Participants: Mark, Ishizaki, Takahashi, Aso, Enzo, Fabian, Shoda, Tanaka, Okutomi, Sato, Hirata, Miyo, Perry, Akutsu == Progress report == Schedule Chart : ([[https://www.dropbox.com/s/3azrs4fvv6tmqy9/VIS%20Overall%20Schedule-20170408.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/ixxp8zj3xjt9lh3/VIS%20Overall%20Schedule-20170408.mpp?dl=0|MPP]]) * Type-A: On schedule (4 weeks delay from original plan) * Type-B: 7 week delay * Type-Bp: On schedule === Type-A (Takahashi) === ==== Past week report ==== Installation in Y-end: 17th(Mon) * Cleaned the booth and opened the chamber. * Unpacked the F1 and moved it into the clean booth. 18th(Tue) * Assembled the end plate 1. * Checked behavior of F2. The frequency depends on the stress due to the cap. 19th(Wed) * Extended the EQ stop to the F1 stage. * Prepared for the F1 damper. * Cabling of the F1. * Put the F1 on the EQ stop. 20th(Thu) * Replaced two release sensors. * Cabling between F1 and F2. ==== Plan for coming weeks ==== * Setting of the F1. * Prepare for the pre-isolator. === Type B (Mark) === ==== Past week report ==== At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): * Plugged in the second pico cable (accidentally shipped to Mitaka and returned) and tested the pico motors with Miyo-kun's MEDM interface. All worked on FAST speed except IM_YAW. Miyo-kun worked on debugging the SLOW and MED speeds. * Realized that the SF/BF/... section doesn't need 6 kg added, it needs 6 kg ''removed'', but none to remove. The 20 kg extra in the BF to match the SF GAS filter makes the whole chain overload the PI GAS filter. * Lifted the SF/BF/... section to check for net weight and balance. Was 307 kg (cf. G&M's measurement of 301 kf in 2012 for the F0). Can be balanced with only 63 g extra. * Went to build up the LBB blade units but discovered that the holes in the base of the blades are two small (are Ø11 mm; should be Ø12 MM). 3D CAD was correct - error was in the 2D drawing. Shipped the blades away for modification. * Tested the SF LVDT actuation and worked on debugging it. Still not working. * Prepared the PI for being lifted, tested the crane adapter, and prepared the top of the assembly frame for receiving the PI. * Searched for and found the old PI-SF rod. (We went to use the new one but found it doesn't work with the old fittings because it has 8 mm instead of 7 mm heads). * Did safety improvements after Enzo hit his head on a flange bolt: reversed all the bolts on the ±X sides of the BS and put caution tape on them. * Worked on understanding/validating/debugging Kokeyama-san's changes to the real-time model for the DIO, and started on TFs to check the output filter compensation is working. ==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. Week of 4/24 (four-day week): * Crane in PI. * Connect SF/BF... section and see if we're indeed overweight and by exactly how much. * Finish debugging SF LVDT actuation. Week of 5/1: * No activity (Golden Week). ==== What to do with the over weight problem ==== * If the top filter optimal load is lower than the actual weight of the SF and below: * We need to reduce the optimal load of SF * By replacing two of the 6 blades in the SF to the BS BF blades, the optimal load of SF will be reduced by 19kg. * Currently, we are putting 21kg on the BF to adjust the load on the SF. We will have 2kg to level the BF. * We will buy new set of jigs for assembling filters in Kamioka. === Type-Bp (Shoda) === ==== Past week report ==== * IM TF measured * IM OSEMs are adjusted * IM TFs are measured * BF/BFRM stage assembled * We closed the cap, and cabling was done till the top of the BF. * Set the top plate and Traverser on the assembly frame and connected to the EQ stop. * BFRM is suspended from the Traverser interface plate. ==== Plan for coming weeks ==== * Optical bench installation test * Set SF and hang BF (optional) ==== Discussion ==== * The resonant frequencies of the IM in pitch and vertical are close. So a lot of cross-coupling at the resonant frequencies is observed. * We should adjust the actuation balance and see if the damping loops can be closed stably or not. === IMMT (Ohishi) === ==== Past week report ==== ==== Plan for coming weeks ==== === Watchdog system (Tanaka) === ==== Past week report ==== *Start operation test of system.-->Interrupution. *Resolved. * When changing theOS(Win7 to Win10) and building the setup environment of S/W,problem occurs that the debug tool can't be used.-->I confirmed that this problem will be solved by rewriting a part of the registry. *A problem occcurred thatcould't be compiled even though the version of the compiler was the same.-->I solved the problem by patching the required include files. ==== Plan for coming weeks ==== *Start operation test of system.-->Ongoing. === Safety === * Incidents: dropped some screws from the 2F * How to protect our heads in the clean booth ? * Photos: https://goo.gl/photos/2j7c3Ver99eC9gSC8 * clean room helmet https://www.monotaro.com/g/00250428/ - not usable for people with small head. * Put caution tapes to warn people * Cover the sharp objects with soft material -> possible for some dangerous objects * Better lighting -> this is very important * Foreseen risks * Type-A: Crane works * Type-B: Crane works * Type-Bp: Crane works == Discussion == * Cable management * Sato-san will maintain the in-vac cable list * Tell Sato-san when you used cables. * VIS purchase * Tell Aso and Takahashi when you purchased something for VIS == Travel Plans == * Travel (Week of 4/24): * Takahashi: 25-28 * Shoda: 24-28 * Mark: 24-27 * Fabian: 24-26 * Okutomi: 24-28 * Fujii: * Ishizaki: 24-28 * Hirata: 24-27 * Sato: 24-28 * Enzo: 24-27 * Ohishi: * Tanaka: * Perry: 24-28 * Sekiguchi(Hosei): 24-28 * Hirayama(Hosei): 24-28 * Travel (Week of 5/8): * Takahashi: 8-12 * Shoda: GWADW * Mark: 9-12 * Fabian: 9-12 * Okutomi: * Fujii: * Ishizaki: 8-12 * Hirata: 9-12 * Sato: 8-12 * Enzo: 9-12 * Ohishi: * Tanaka: * Sekiguchi(Hosei): 8-12 * Hirayama(Hosei): 8-12 == Next meeting == On 2017/4/28(Fri)