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KAGAYA studio
The Japanese Space
Gravitational Wave Antenna
DECIGO
Shuichi
Shuichi Sato
Sato
Hosei
Hosei University
University
Seiji
Seiji Kawamura,
Kawamura, Masaki
Masaki Ando,
Ando, Takashi
Takashi Nakamura,
Nakamura, Kimio
Kimio Tsubono,
Tsubono, Takahiro
Takahiro Tanaka,
Tanaka, Ikkoh
Ikkoh Funaki,
Funaki, Naoki
Naoki Seto,
Seto, Kenji
Kenji Numata,
Numata, Nobuyuki
Nobuyuki Kanda,
Kanda, Takeshi
Takeshi
Takashima,
Takashima, Kunihito
Kunihito Ioka,
Ioka, Kazuhiro
Kazuhiro Agatsuma,
Agatsuma, Tomotada
Tomotada Akutsu,
Akutsu, Tomomi
Tomomi Akutsu,
Akutsu, Koh-suke
Koh-suke Aoyanagi,
Aoyanagi, Koji
Koji Arai,
Arai, Yuta
Yuta Arase,
Arase, Akito
Akito Araya,
Araya, Hideki
Hideki Asada,
Asada,
Yoichi
Yoichi Aso,
Aso, Takeshi
Takeshi Chiba,
Chiba, Toshikazu
Toshikazu Ebisuzaki,
Ebisuzaki, Motohiro
Motohiro Enoki,
Enoki, Yoshiharu
Yoshiharu Eriguchi,
Eriguchi, Masa-Katsu
Masa-Katsu Fujimoto,
Fujimoto, Ryuichi
Ryuichi Fujita,
Fujita, Mitsuhiro
Mitsuhiro Fukushima,
Fukushima, Toshifumi
Toshifumi
Futamase,
Futamase, Katsuhiko
Katsuhiko Ganzu,
Ganzu, Tomohiro
Tomohiro Harada,
Harada, Tatsuaki
Tatsuaki Hashimoto,
Hashimoto, Kazuhiro
Kazuhiro Hayama,
Hayama, Wataru
Wataru Hikida,
Hikida, Yoshiaki
Yoshiaki Himemoto,
Himemoto, Hisashi
Hisashi Hirabayashi,
Hirabayashi, Takashi
Takashi
Hiramatsu,
Hiramatsu, Feng-Lei
Feng-Lei Hong,
Hong, Hideyuki
Hideyuki Horisawa,
Horisawa, Mizuhiko
Mizuhiko Hosokawa,
Hosokawa, Kiyotomo
Kiyotomo Ichiki,
Ichiki, Takeshi
Takeshi Ikegami,
Ikegami, Kaiki
Kaiki T.
T. Inoue,
Inoue, Koji
Koji Ishidoshiro,
Ishidoshiro, Hideki
Hideki Ishihara,
Ishihara,
Takehiko
Takehiko Ishikawa,
Ishikawa, Hideharu
Hideharu Ishizaki,
Ishizaki, Hiroyuki
Hiroyuki Ito,
Ito, Yousuke
Yousuke Itoh,
Itoh, Shogo
Shogo Kamagasako,
Kamagasako, Nobuki
Nobuki Kawashima,
Kawashima, Fumiko
Fumiko Kawazoe,
Kawazoe, Hiroyuki
Hiroyuki Kirihara,
Kirihara, Naoko
Naoko
Kishimoto,
Kishimoto, Kenta
Kenta Kiuchi,
Kiuchi, Shiho
Shiho Kobayashi,
Kobayashi, Kazunori
Kazunori Kohri,
Kohri, Hiroyuki
Hiroyuki Koizumi,
Koizumi, Yasufumi
Yasufumi Kojima,
Kojima, Keiko
Keiko Kokeyama,
Kokeyama, Wataru
Wataru Kokuyama,
Kokuyama, Kei
Kei Kotake,
Kotake, Yoshihide
Yoshihide
Kozai,
Kozai, Hideaki
Hideaki Kudoh,
Kudoh, Hiroo
Hiroo Kunimori,
Kunimori, Hitoshi
Hitoshi Kuninaka,
Kuninaka, Kazuaki
Kazuaki Kuroda,
Kuroda, Kei-ichi
Kei-ichi Maeda,
Maeda, Hideo
Hideo Matsuhara,
Matsuhara, Yasushi
Yasushi Mino,
Mino, Osamu
Osamu Miyakawa,
Miyakawa, Shinji
Shinji Miyoki,
Miyoki,
Mutsuko
Mutsuko Y.
Y. Morimoto,
Morimoto, Tomoko
Tomoko Morioka
Morioka ,, Toshiyuki
Toshiyuki Morisawa,
Morisawa, Shigenori
Shigenori Moriwaki,
Moriwaki, Shinji
Shinji Mukohyama,
Mukohyama, Mitsuru
Mitsuru Musha,
Musha, Shigeo
Shigeo Nagano,
Nagano, Isao
Isao Naito,
Naito, Noriyasu
Noriyasu
Nakagawa,
Nakagawa, Kouji
Kouji Nakamura,
Nakamura, Hiroyuki
Hiroyuki Nakano,
Nakano, Kenichi
Kenichi Nakao,
Nakao, Shinichi
Shinichi Nakasuka,
Nakasuka, Yoshinori
Yoshinori Nakayama,
Nakayama, Erina
Erina Nishida,
Nishida, Kazutaka
Kazutaka Nishiyama,
Nishiyama, Atsushi
Atsushi
Nishizawa,
Nishizawa, Yoshito
Yoshito Niwa,
Niwa, Masatake
Masatake Ohashi,
Ohashi, Naoko
Naoko Ohishi,
Ohishi, Masashi
Masashi Ohkawa,
Ohkawa, Akira
Akira Okutomi,
Okutomi, Kouji
Kouji Onozato,
Onozato, Kenichi
Kenichi Oohara,
Oohara, Norichika
Norichika Sago,
Sago, Motoyuki
Motoyuki Saijo,
Saijo,
Masaaki
Masaaki Sakagami,
Sakagami, Shin-ichiro
Shin-ichiro Sakai,
Sakai, Shihori
Shihori Sakata,
Sakata, Misao
Misao Sasaki,
Sasaki, Takashi
Takashi Sato,
Sato, Masaru
Masaru Shibata,
Shibata, Hisaaki
Hisaaki Shinkai,
Shinkai, Kentaro
Kentaro Somiya,
Somiya, Hajime
Hajime Sotani,
Sotani, Naoshi
Naoshi
Sugiyama,
Sugiyama, Yudai
Yudai Suwa,
Suwa, Hideyuki
Hideyuki Tagoshi,
Tagoshi, Kakeru
Kakeru Takahashi,
Takahashi, Keitaro
Keitaro Takahashi,
Takahashi, Tadayuki
Tadayuki Takahashi,
Takahashi, Hirotaka
Hirotaka Takahashi,
Takahashi, Ryuichi
Ryuichi Takahashi,
Takahashi, Ryutaro
Ryutaro
Takahashi,
Takahashi, Takamori
Takamori Akiteru,
Akiteru, Tadashi
Tadashi Takano,
Takano, Keisuke
Keisuke Taniguchi,
Taniguchi, Atsushi
Atsushi Taruya,
Taruya, Hiroyuki
Hiroyuki Tashiro,
Tashiro, Mitsuru
Mitsuru Tokuda,
Tokuda, Masao
Masao Tokunari,
Tokunari, Morio
Morio Toyoshima,
Toyoshima,
Shinji
Shinji Tsujikawa,
Tsujikawa, Yoshiki
Yoshiki Tsunesada,
Tsunesada, Ken-ichi
Ken-ichi Ueda,
Ueda, Masayoshi
Masayoshi Utashima,
Utashima, Hiroshi
Hiroshi Yamakawa,
Yamakawa, Kazuhiro
Kazuhiro Yamamoto,
Yamamoto, Toshitaka
Toshitaka Yamazaki,
Yamazaki, Jun'ichi
Jun'ichi Yokoyama,
Yokoyama,
7th International
LISATaizoh
Symposium
Barcelona, Spain / 16-20 June, 2008
Chul-Moon
Yoo,
Yoshino
Chul-Moon
Yoo, Shijun
Shijun Yoshida,
Yoshida,
Taizoh
Yoshino
Idea of DECIGO
Deci-hertz Interferometer Gravitational Wave Observatory
Seto, Kawamura and Nakamura, PRL 87, 221103 (2001)
Kawamura, et al., CQG 23 (2006) S125-S131
Bridges the gap between LISA and terrestrial detector
Low confusion noise -> Extremely high sensitivity
Strain [Hz -1/2]
10-18
10-20
LISA
DECIGO
10-22
10-24
Terrestrial
detectors
(e.g. LCGT)
10-4
10-2
100
102
104
Frequency [Hz]
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008
Pre-conceptual design
“Differential FP interferometer”
Arm length: 1000 km
Mirror diameter: 1 m
Mirror mass: 100 kg
Laser wavelength：532 nm
Laser power: 10 W
Finesse: 10
S/Cs: drag free
3 interferometers
Arm cavity
Mirror
Laser
Drag-free S/C
7th International LISA Symposium
Arm cavity
Photodetector
Barcelona, Spain / 16-20 June, 2008
Design sensitivity and requirements
Acceleration noise should be suppressed below radiation pressure noise
Force noise: DECIGO = LISA/50
(Acceleration noise in terms of h: 1, Distance: 1/5000, Mass: 100)
Fluctuation of magnetic field, electric field, gravitational field,temperature etc.
Sensor noise should be suppressed below shot noise
Phase noise: DECIGO = LCGT x10
(Sensor noise in terms of h: 1, storage time: 10)
Frequency noise, intensity noise, beam jitter, etc.
Thruster system should satisfy range, noise, bandwidth, and durability
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008
Science case
Formation of
Super-massive BH
10-19
10-20
1 unit
Coalescence
10-21
5 years
3 months
10-22
Correlation
(3 years)
10-23
Shot noise
10-24
Coalescence
10-25
10-26
Verification
of inflation
10-3
7th International LISA Symposium
10-2
10-1
1
10
Frequency [Hz]
102
103
Acceleration
of Universe
↓
Dark energy
Barcelona, Spain / 16-20 June, 2008
Orbit and constellation (preliminary)
Earth
Correlation
for stochastic
background
Sun
Increase angular
resolution
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008
Roadmap
07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Mission
R&D
Fabrication
R&D
Fabrication
DECIGO Pathfinder
(DPF)
Objectives
Test of key technologies
Scope
1 S/C
1 arm cavity
7th International LISA Symposium
R&D
Fabrication
Pre-DECIGO
DECIGO
Detection of GW
w/ minimum spec.
Full GW astronomy
Test FP cavity
between S/Cs
3 S/Cs
1 interferometer
3 S/Cs,
3 interferometers
3 or 4 units
Barcelona, Spain / 16-20 June, 2008
DPF and pre-DECIGO
DECIGO pathfinder (DPF)
Key Technology demonstration
Dragfree opration
Launch lock mechanism
Precision interferometry in space
JAXA/ISAS “small science satellite series” project
Selected as one of 5 important missions
R&D budget allocated
→Following talk by ANDO
pre-DECIGO
GW [email protected]
With minimun inteferometer configuration
Key technology demonstration
Formation flight
Dragfree opration with multi S/Cs
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008
Current status
There are now 140 members from 50 institutes in DECIGO
working group
DPF was selected as one of five important mission
candidates for “small science satellite series” run by
JAXA/ISAS; a budget for R&D was allocated
At the end of 2008, the 2nd and 3rd missions will be selected.
(1st mission already selected)
→Following talk by ANDO
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008
Fortune cookie
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008
Title
7th International LISA Symposium
Barcelona, Spain / 16-20 June, 2008