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Anyone are welcome to join the discussions on site or via online and for even those who didn't make a registration. |
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== Agenda == * Things happened since [[LCGT/Meeting/f2f/2019Apr/FuSat|the last satellite meeting]] * O5 plans (A+,AdV+) and schedule are [[https://dcc.ligo.org/LIGO-P1900218/public|released to public]] * Schedule of 3G (ET, CE) released in [[https://agenda.infn.it/event/15928/|GWADW 2019]] * A new proposal [[https://indico.ego-gw.it/event/20/contributions/401/attachments/292/432/DEM_DAWN5_Oz_roadmap_v2.pdf|ozGrav-HF]] * [[http://ilm.univ-lyon1.fr/index.php?option=com_content&view=article&id=973|iLM]] submitted a proposal to produce large sapphire bulk up to 200~250 kg and aiming low heat absorption (< 10ppm/cm) * ITM birefringence issue found (e.g. [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10369|JGW-G1910369]]) * Science study updated by A.Nishizawa [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9934|JGW-G1909934]] by considering LVK network * We would like to get agreement/understanding on the followings: * Publication on the KAGRA future upgrades * Define the ultimate goal in long term towards 2030's * More realistic plans for O5 * Publication plan (Full KAGRA author) * Serve as the 2nd release of the white paper * Discussion about the ultimate goal and intermediate plants including O5 * Share the same idea inside the collaboration as well as to inform it to LV and near-by communities * Submission/publication target just after KAGRA manage to join O3 (late 2019~early 2020 ?) * Target journal: PRL or PRD ? (depending on the number of pages/figures) c.f. iKAGRA => [[https://academic.oup.com/ptep/article/2018/1/013F01/4817346|PTEP]], bKAGRA-ph1 => [[https://iopscience.iop.org/article/10.1088/1361-6382/ab28a9|CQG]] * Ultimate goal of KAGRA * Time scale around 2030 * It should fill the gap between O5 and 3G * 200 kg Sapphire as the primary candidate (iLM may help us a lot if their proposal is accepted) * Backup plan with Silicon ? Decision tree should be prepared * With 200 kg sapphire and 500 W laser, 500 Mpc may be possible [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10533|JGW-G1910533]] * What is the name ? Naming is important: hKAGRA ? (hyper-KAGRA, or h as Heavy-mass and High-power), uKAGRA ? (ultimate-KAGRA) or dKAGRA ? (dream-KAGRA) * More realistic plans for O5 * Due to the ITM issues it may be difficult to achieve the design sensitivity during O4 * One option is to achieve the design sensitivity (with detuning) of 150 Mpc in O5 * Detuning doesn't go well with squeezing. Should we give up detuning but BRSE with FD squeezing (60m filter cavity ?) * High Freq. (HF) upgrade requires R&D and change of suspensions which may have a risk to worsen the sensitivity, while FD squeezing can be installed independently so that we can go back to detuning option if the installation of squeezing doesn't finish in time |
Satellite Meeting on Future Upgrade of KAGRA
Date/Time/Venue
August 21th (Wed.) 13:00 - (We would like to finish the main discussions by 15:30, when the KAGRA site tour starts)
Venue: Multi purpose room (多目的ホール), Faculty of Science, University of Toyama, Gofuku Campus
(Note that different from the venue of F2F meeting, Kuroda hall)
Zoom(2) connection: https://zoom.us/j/6676627462
Anyone are welcome to join the discussions on site or via online and for even those who didn't make a registration.
Related information
Program
Time |
Subject and Title |
Speaker |
File |
13:00-13:30 |
Introduction |
|
|
|
Introduction from FPC |
S. Haino and FPC |
|
13:30-14:15 |
Mirror and Cryogenics |
|
|
|
Sapphire Mirror |
M.Leonardi,T.Tomaru |
|
|
Heat extraction |
T.Yamada,T.Tomaru |
|
14:15-15:30 |
Upgrade plans |
|
|
|
Upgrade plans and publication |
S. Haino and FPC |
|
15:30-16:00 |
Break |
|
|
16:00-18:00 |
Discussions |
|
|
|
Discussions |
|
|
Agenda
Things happened since the last satellite meeting
O5 plans (A+,AdV+) and schedule are released to public
Schedule of 3G (ET, CE) released in GWADW 2019
A new proposal ozGrav-HF
iLM submitted a proposal to produce large sapphire bulk up to 200~250 kg and aiming low heat absorption (< 10ppm/cm)
ITM birefringence issue found (e.g. JGW-G1910369)
Science study updated by A.Nishizawa JGW-G1909934 by considering LVK network
- We would like to get agreement/understanding on the followings:
- Publication on the KAGRA future upgrades
- Define the ultimate goal in long term towards 2030's
- More realistic plans for O5
- Publication plan (Full KAGRA author)
- Serve as the 2nd release of the white paper
- Discussion about the ultimate goal and intermediate plants including O5
- Share the same idea inside the collaboration as well as to inform it to LV and near-by communities
- Submission/publication target just after KAGRA manage to join O3 (late 2019~early 2020 ?)
Target journal: PRL or PRD ? (depending on the number of pages/figures) c.f. iKAGRA => PTEP, bKAGRA-ph1 => CQG
- Ultimate goal of KAGRA
- Time scale around 2030
- It should fill the gap between O5 and 3G
- 200 kg Sapphire as the primary candidate (iLM may help us a lot if their proposal is accepted)
- Backup plan with Silicon ? Decision tree should be prepared
With 200 kg sapphire and 500 W laser, 500 Mpc may be possible JGW-G1910533
- What is the name ? Naming is important: hKAGRA ? (hyper-KAGRA, or h as Heavy-mass and High-power), uKAGRA ? (ultimate-KAGRA) or dKAGRA ? (dream-KAGRA)
- More realistic plans for O5
- Due to the ITM issues it may be difficult to achieve the design sensitivity during O4
- One option is to achieve the design sensitivity (with detuning) of 150 Mpc in O5
- Detuning doesn't go well with squeezing. Should we give up detuning but BRSE with FD squeezing (60m filter cavity ?)
High Freq. (HF) upgrade requires R&D and change of suspensions which may have a risk to worsen the sensitivity, while FD squeezing can be installed independently so that we can go back to detuning option if the installation of squeezing doesn't finish in time