= Satellite Meeting on Future Upgrade of KAGRA = [[LCGT/Meeting/f2f/2018Dec|Main F2F Page]] == Date/Time/Venue == Dec. 4th (Tue) 13:30 - 17:30 Large seminar room (3201) in Subaru building (the same as the main F2F meeting) Zoom connection: https://zoom.us/j/5045179604 == Program == ||Time ||Subject and Title ||<24% style="text-align:center">Speaker ||File || ||13:30-13:45 ||Explanation of the context ||Y. Aso ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9376|O]] || ||13:45-14:45 ||||'''Report of past activities in Advanced R&D group''' || || || ||Summary of Past Discussions on KAGRA Upgrade ||Y. Michimura ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9313|(>_<)]] || ||14:45-15:00 ||||'''Break''' || || ||15:00-16:15 ||||'''Contributed talks''' || || ||10 min ||R&D of 100kg sapphire crystals ||E. Hirose ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9363|o]] || ||10 min ||R&D of frequency dependent squeezer ||Ray-Kuang Lee/NTHU ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9357|o]] || ||10 min ||R&D of Newtonian noise measurement ||Tomofumi Shimoda (U-Tokyo) ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9368|o]] || ||20 min ||TAMA300 filter cavity exp. status ||Yu-hang Zhao and Chien-Ming Wu ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9377|o]] || ||10min ||EPR entanglement ||K. Somiya ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9365|o]] || ||10min ||Engineering management for KAGRA upgrade ||Y. Aso ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9361|O]] || ||16:15-16:30 ||'''Break''' || ||[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=XXXX|x]] || ||16:30-17:30 ||||'''Discussion''' || || || || || || || ---- == Minutes == === Introduction by Aso === * Why FPC is proposed ? * Purpose/Scope of FPC * Steps to start FPC === Summary of the past upgrade studies by Michimura === * Extensive studies have already been carried out * Several options were compared * High frequency optimized plan seems better * Candidates for short term upgrade (cheap, quick) and longer term upgrade (larger change and more expensive) were discussed === Contributed talks by various people === * 100kg sapphire (Hirose) * Frequency dependent squeezing (Lee) * Newtonian noise measurement (Shimoda) * TAMA300 filter cavity (Zhao, Wu) * EPR entanglement (Somiya) * Engineering management (Aso) === Discussion === ==== What should be included in the white paper ==== * Scientific motivation * Survey of the current technologies * Cheap, Expensive * Ready, Not ready * Limits of the current facility * Trade-off studies * Two plans * Near term upgrade plan * Longer term upgrade plan * Back up plans * R&Ds to be done * Budget for R&D * Budget estimate * Project execution plan ==== Schedule for the white paper ==== * Work in progress draft to be presented @ KIW in Feb 2019 * Get feedbacks from Virgo people * First draft to be circulated @ April 2019 F2F * Final version to be put for approval @ Aug 2019 F2F ==== How to proceed the discussion ? ==== * Make a skelton of the white paper first * Dig deeper into each item with sub-groups ==== Other discussion ==== * Definitions of short term and longer term upgrades * Short term: after O4 (~ in 5 years) * Longer term: after O5-6 ? ~ in 10 years * This should be discussed in FPC * How to get funding should be discussed with relevant people (ICRR, senior people in collaborating countries, etc) in parallel with the white paper writing. * Need to keep ICRR in the circle. * Review (external/internal) of the white paper may be necessary before submitting to the KSC and EO for approval. * The white paper should be updated with changing environment * How RDC should select KAGRA project R&Ds before the white paper is finalized ? * RDC may be able to make interim approvals * These interim KAGRA project R&Ds should be checked against the white paper once it is ready * Should be discussed more in the KSC session.