<> ---------- = VIS Meeting = Date: 2025/4/11 10:00-11:00 [[https://zoom.us/j/203743987|Zoom]] Participants: Aso, Akutsu, Sato, Takahashi, Miyoki == Topics == === Type-A === * ACCs for the IP controls. * Evaluation of the FLDACC is ongoing with DGS in ATC. The present status is [[https://www.dropbox.com/scl/fi/ls12u2sk0lj7udw7079w5/FLDACCtest.pdf?rlkey=pdnukiczt8qmkn4i4t6b7buh2&dl=0|here]]. === Type-B/Bp === * Enclosure for the SG card into an independent box. * Tanaka-san made a prototype box. 1U panel will be prepared to mount the box. * Yaw damper for Type-B. * We have asked ATC about the design of the IRM damper as the item in 2025FY. The updated conceptual design is [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|here]]. The inner diameter of the coil bobbin should be larger (than 20mm). * IP for Type-Bp. === Type-C === * Active isolation table for OMC. * Sato-san performed the FEM analysis on breadboard thickness. * The new geophone pre-amp boards had a [[https://www.dropbox.com/scl/fi/csxmxrkevz6pwt3z9r142/Choke-2R2-_0001_0001.pdf?rlkey=ymmi9u4h66etxsetqmffu7qq5&dl=0|problem]]. * It isn't easy to purchase L4-C geophones. * Vibration in the IFI chamber * Washimi-san suggested a handmade in-vac. [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16609|mini-geophone]]. * Small Type-C suspensions with mini-GAS. === R&D === == Discussion == == Next meeting == * 2025/4/25 10:00-