1. 11 Kazuhiro Yamamoto Institute for Cosmic Ray Research The university of Tokyo Current status (ELiTES meeting, Guests, Toshiba, Sapphire fibers) KAGRA cryogenic payload meeting 7 November 2012

2. 2 First ELiTES meeting 3rd and 4th of Oct. in Tokyo

3. 3 Many fruitful discussion First ELiTES meeting 3 Mechanical coating loss : Discrepancy between Tokyo and Glasgow E. Hirose is measuring mechanical loss in ICRR and K. Craig, P. Murray, J. Komma, and R. Nawrodt (supported by ELiTES) joined. Measurement of radiation shield We discussed the schedule with L. Naticchioni and E. Majorana.

4. 4 Rana Adhikari stayed in Kashiwa (first half of Oct.). On 16th of Oct., K. Yamamoto, T. Sekiguchi, D. Chen, K. Somiya, and S. Sakata discussed with Rana about payload. It is quite fruitful. Kazuhiro should summarize the dicssion, but not yet. Rana’s visit 4 Other guest Ruggero Micheletto (Yokohama City University) on 23rd of Oct.

5. 5 K. Yamamoto explained outline of cryogenic payload in the meeting with staffs of Toshiba (9th of Oct.). They are interested with the development of payload. Cryo payload and Toshiba

6. 66 During cooling test of KAGRA cryostat... Initial cooling time (radiation effect) Metal sphere with and without DLC coating 1/2 dummy payload with sapphire dummy mirror Measurement of shiled vibration L. Naticchioni and D. Chen (Chen’s talk) Experiments in Toshiba

7. 7 Metal sphere with and without DLC coating They are prepared (Y. Sakakibara and D. Chen)!

8. 8 Experiments in Toshiba 1/2 dummy payload with sapphire dummy mirror Meeting on 9th and 23rd of Oct. S. Koike proceeds with design. Final version coming soon.

9. 9 Progress in Toshiba 31st of Oct. 2012

10. 10 Progress in Toshiba 31st of Oct. 2012

11. 11 Progress in Toshiba 31st of Oct. 2012

12. 12 IMPEX HighTech GmbH (German company) They can make similar fibers (nail heads on the both ends). Finally, they were sent to Japan (5th of Nov) ! Sapphire fibers

13. Sapphire fiber 13