1st international lisa-decigo workshop (november 12-13, 2008, jaxa/isas, sagamihara, japan) decigo...

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1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Jap an) DECIGO Pathfinder DECIGO Pathfinder Seiji Kawamura, Takashi Nakamura, Kimio Tsubono, Takahiro Tanaka, Ikkoh Funaki, Naoki Seto, Kenji Numata, Shuichi Sato, Seiji Kawamura, Takashi Nakamura, Kimio Tsubono, Takahiro Tanaka, Ikkoh Funaki, Naoki Seto, Kenji Numata, Shuichi Sato, Nobuyuki Kanda, Takeshi Takashima, Kunihito Ioka, Kazuhiro Agatsuma, Tomotada Akutsu, Tomomi Akutsu, Koh-suke Aoyanagi, Nobuyuki Kanda, Takeshi Takashima, Kunihito Ioka, Kazuhiro Agatsuma, Tomotada Akutsu, Tomomi Akutsu, Koh-suke Aoyanagi, Koji Arai, Yuta Arase, Akito Araya, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Motohiro Enoki, Koji Arai, Yuta Arase, Akito Araya, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Katsuhiko Ganzu, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Katsuhiko Ganzu, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Shogo Kamagasako, Nobuki Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Shogo Kamagasako, Nobuki Kawashima, Fumiko Kawazoe, Hiroyuki Kirihara, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Kawashima, Fumiko Kawazoe, Hiroyuki Kirihara, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama, Kei Kotake, Yoshihide Kozai, Hideaki Kudoh, Hiroo Kunimori, Kokuyama, Kei Kotake, Yoshihide Kozai, Hideaki Kudoh, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Shinji Miyoki, Mutsuko Y. Hitoshi Kuninaka, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Shinji Miyoki, Mutsuko Y. Morimoto, Tomoko Morioka , Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha, Shigeo Nagano, Isao Morimoto, Tomoko Morioka , Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha, Shigeo Nagano, Isao Naito, Noriyasu Nakagawa, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Erina Naito, Noriyasu Nakagawa, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Erina Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Akira Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Akira Okutomi, Kouji Onozato, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Okutomi, Kouji Onozato, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Hideyuki Tagoshi, Kakeru Takahashi, Keitaro Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Ryuichi Takahashi, Suwa, Hideyuki Tagoshi, Kakeru Takahashi, Keitaro Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Ryuichi Takahashi, Ryutaro Takahashi, Takamori Akiteru, Tadashi Takano, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Mitsuru Tokuda, Ryutaro Takahashi, Takamori Akiteru, Tadashi Takano, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Mitsuru Tokuda, Masao Tokunari, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Ken-ichi Ueda, Masayoshi Utashima, Hiroshi Yamakawa, Masao Tokunari, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Ken-ichi Ueda, Masayoshi Utashima, Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino Masaki Ando Masaki Ando Department of Physics, the University of Tokyo Department of Physics, the University of Tokyo

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  • DECIGO Pathfinder

    Seiji Kawamura, Takashi Nakamura, Kimio Tsubono, Takahiro Tanaka, Ikkoh Funaki, Naoki Seto, Kenji Numata, Shuichi Sato, Nobuyuki Kanda, Takeshi Takashima, Kunihito Ioka, Kazuhiro Agatsuma, Tomotada Akutsu, Tomomi Akutsu, Koh-suke Aoyanagi, Koji Arai, Yuta Arase, Akito Araya, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Katsuhiko Ganzu, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Shogo Kamagasako, Nobuki Kawashima, Fumiko Kawazoe, Hiroyuki Kirihara, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, WataruKokuyama, Kei Kotake, Yoshihide Kozai, Hideaki Kudoh, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Shinji Miyoki, Mutsuko Y. Morimoto, Tomoko Morioka , Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha, Shigeo Nagano, Isao Naito, Noriyasu Nakagawa, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Erina Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Akira Okutomi, Kouji Onozato, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Hideyuki Tagoshi, Kakeru Takahashi, Keitaro Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Ryuichi Takahashi, Ryutaro Takahashi, Takamori Akiteru, Tadashi Takano, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Mitsuru Tokuda, Masao Tokunari, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Ken-ichi Ueda, Masayoshi Utashima, Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh YoshinoMasaki AndoDepartment of Physics, the University of Tokyo

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • OverviewMission payload Noise estimation Current status Summary

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Overview

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DECIGO RoadmapFigure: S.KawamuraDICIGO Pathfinder (DPF)Pre-DECIGODECIGOR&DFabricationR&DFabricationR&DFabrication

    200708091011121314151617181920212223242526MissionObjectiveTest of key technologiesGW observation at low frequenciesDetection of GW w/ minimum spec.Test FP cavity between S/CFull GW astronomy

    Design1 S/C1 Fabry-Perot arm3 S/C1 interferometer3 S/C,3 interferometer3 or 4 units

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DECIGO PathfinderDECIGO Pathfinder (DPF)One small satellite (Weight: ~350kg, Orbit: around the Earth) 30cm Fabry-Perot cavity formed by free masses Stabilized laser source Drag-free control systemLocal SensorActuatorThrusterScientific observation Low-frequency (0.1-1Hz) GWs Intermediate-mass BHs at the Galactic center Gravity distribution of EarthTest and demonstration for DECIGO Laser stabilization system Control of Fabry-Perot interferometer Drag-free control system

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DPF SatelliteSize : 950mm cubeWeight : 200kgSAP : 940W Battery: 50AHDownlink : 2MpbsDR: 1GByte3N Thrusters x 4Stabilized LaserInterferometer ModuleThruster Control UnitSolar PaddleInterfererometer Control UnitHousing Control UnitMission ThrustersCentral Processing UnitBus ThrustersSatellite Bus (Standard bus system)Power SupplySpW Comm.

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DPF Mission OutlineOrbit: Low-Earth (Altitude 500km), Sun-synchronous orbit (dusk-dawn)Launcher: Single launch by M-V follow-on (solid rocket booster under development) PBS (Post-Boost stage) for fine orbit insertionMission Lifetime: 1 year (nominal)500kmAttitude Control: Gravity-gradient stab. Drag-free control with mission thrusters

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Mission payload

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DPF Payload Fabry-Perot interferometer Finesse : 100 Length : 30cm Test mass : 1kg Signal extraction by PDHLaser source Yb:YAG laser (1030nm) Power : 25mW Freq. stab. by Iodine cellDrag-free control Local sensor signal Feedback to mission thrustersWeight : ~150 kgSize : ~95 cm cubeUpper half of the satellite

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Stabilized laser Laser source Yb:YAG laser (1030nm) Power : 25mW Freq. stab. by Iodine absorption line 0.5 Hz/Hz1/2 (at 0.1Hz)Comparable stability with that by a reference cavity at 0.1HzAdvantage of I2 stabilization Less affected by environment Easier ground-base tests Moderate vibration isolation No vacuum systemDisadvantages Less experienceNarrow absorption line at 515nmMusha-san and Nagano-sans talks tomorrow

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Main interferometer Test-mass module Keeps a test inside Local sensor/actuator Launch-lock system Interferometer sensors for fine measurement Sato-sans talk tomorrowFabry-Perot interferometer Finesse : 100 Length : 30cm Test mass : ~1kg Signal extraction by PDH

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Drag-free and attitude controlDrag-free control for demonstration of control system suppression of external disturbances (solar radiation, air drag, )Passive + Active stabilization Passive stabilization by gravity-gradient Mast (~30kg) attached for MOI adj. Active drag-free with 12 mission thrustersSatellite Bus Attitude control at initial phase and fail safe 3N thruster x4, Magnetic torquer x3 Solar sensor, Fiber gyroscope Requirement: 10-9 m/Hz1/2 (0.1Hz) for satellite disp.MastMoriwaki-sans talk tomorrow

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DPF SensitivitySatellite mass : 350kg, Area: 2m2Altitude: 500kmThruster noise: 0.1N/Hz1/2 Laser source : 1030nm, 25mW IFO length : 30cmFinesse : 100, Mirror mass : 1kgQ-factor : 105, Substrate: Fused SilicaTemperature : 293K(Preliminary parameters)

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DPF TargetsQuasi-normal mode oscillationBinary inspiral of BHsDetectable with SNR~5h ~ 10-13 , f ~ 0.3 Hz Distance 10 kpc, m = 105 Msun h ~ 10-15 , f ~ 4 Hz Distance 10kpc, m = 103 Msun Science target: Intermediate-mass BHs at GCKAGAYA

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Noise estimation

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Comparison with LPFLPF (LISA Pathfinder)DPF (DECIGO Pathfinder) Purpose Launch

    WeightOrbit

    Test MassLaser sourceInterferometerSensitivity Demonstration for LISA

    2010Dedicated launcher (Vega)1,900 kg Halo orbit around L1Drag-free attitude controlAu-Pt alloy x2Nd:YAG (1064nm)Mach-Zehnder3x10-14 m/s2/Hz1/2 (1mHz) Demonstration for DECIGO GW observation~2012Dedicated launcher (M-V follow-on)350 kg SSO altitude 500kmDrag-free attitude controlTBD x2Yb:YAG (1030nm)Fabry-Perot1x10-15 m/s2/Hz1/2 (0.1Hz)

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Gravity-gradient noise Global gravity field model Public data obtained by GRACE Up to 2190 th-order coefficients in spherical harmonicsSatellite velocity of 5km/sec Sufficiently small at 0.1Hz band10-7 m/s2 acceleration at low freq.Satellite moves in the gravity field of Earth

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Geomagnetic noise Public data at Esashi observatory 1 sample/min data Extrapolate for higher frequencyTwo effect by geomagnetic fieldGeomagnetic field model IGRF-10 model (10th generation of International Geomagnetic Reference Field) Altitude 500km Satellite velocity of 5km/sec Satellite self-field Fluctuation in geomagnetic fieldSatellite motion in magnetic field

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Noise sourcesResidual GasThermal radiationMagnetic fieldLaser freq. noiseForceAccelerationAcceleration noiseDisplacement noise

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Current Status

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • JAXAs small satellite seriesPlan to launch 3 small satellites by the year 2015 using next-generation solid rocket booster Reduce time and cost by means of Standard bus system

    Bus weight : ~ 200kg, Bus power : ~ 900W Downlink ~ 2Mbps, Data storage ~ 1GByte 3-axes attitude control SpaceWire-based data processing systemImage CG of TOPS (design has been changed now)

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • DPF Current statusProposing to launch in 2012 as 2nd small satellite of JAXA2005 Jan.Submit a proposal of small GW detector mission2006 Nov.Submit a proposal of GW-detector satellite as DECIGO pathfinder (DPF)2007 Aug. Selected as a Pre-Phase-A mission R&D costs funded Brief HistoryPrecursor: Small GW sensor (SWIMmn) to be launched in FY2008SWIM fixed to SDS-1 satellite (July 11, 2008)

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • SWIMmnSensor module to demonstrate SpW communicationObservation of gravitational waves (10-7 /Hz1/2)Monitor the satellite environment as accelerometersSWIMmn : Tiny gravitational-wave detectorTest massPhoto sensorCoilTAM: Torsion Antenna Module with free-falling test mass (Size : 80mm cube, Weight : ~500g)Reflective-type optical displacement sensorSeparation to mass ~1mmSensitivity ~ 10-9 m/Hz1/26 PSs to monitor mass motion~47g Aluminum, Surface polishedSmall magnets for position controlUsed for test-mass position controlMax current ~100mA2 TAMs in the frame

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • SWIMSmall module for demonstration of SpaceWire-based data processing systemSWIM (Space wire demonstration module)Total system Size : 220x200x180 Weight ~ 5.6 kg Power ~ 14 W One of main missions of SDS-1 CPU: HR5000 (64bit, 33MHz) System Memory: 2MB Flash Memory 4MB Burst SRAM 4MB Asynch. SRAM Data Recorder: 1GB SDRAM 1GB Flash Memory SpW: 3chComprised of SpaceCube2 and SWIMmn SpaceCube2: Space-qualified ComputerSWIMmn : User Module Processor test board GW+Acc. sensor FPGA board DAC 16bit x 8 ch ADC 16bit x 4 ch 32 ch by MPX Torsion Antenna x2 ~47g test massSize: 71 x 221 x 171 Weight: 1.9 kg Power: 7W Power 15V, +5V SpW x2 for CMD/TLMData Rate : 380kbps Size: 124 x 224 x 174 Weight: 3.5 kg Power: ~7W Power +28V RS422 for CMD/TLMGPS signalSDS-1 Bus SystemCurrent status: Fixed to SDS-1 CMD/TLM checkedPhoto by JAXAPhoto by JAXA

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • SDS-1Small satellite for demonstration of space technologiesSDS-1 (Small Demonstration Satellite)Size : 70x70x60cm,Weight : 100kgPower : >100W, Downlink : ~5kbps Orbit : SSO (~660km)Spin stabilization and 3-axis attitude controlMission Lifetime : ~Half year (nominal) Launch: FY2008 by H-IIA (piggy-back)http://www.iat.jaxa.jp/info/prm/2007/019/01.html SDS-1 and GOSAT (Press Release, November 4, 2008) Photo from Nainich Newspapser Web

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • Summary

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • SummaryOne small satellite (Weight: ~350kg, Orbit: around the Earth) 30cm Fabry-Perot cavity formed by free masses Stabilized laser source Drag-free control systemLocal SensorActuatorThrusterGravitational-wave observationTest and demonstration for DECIGODECIGO Pathfinder: First precursor satellite for DECIGOSelected and funded as one of the candidates of JAXAs small satellite missions Hoping to be launched in 2012 Observation band : 0.1Hz-1HzTarget : IBHs at the Galactic center

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)

  • End

    1st International LISA-DECIGO Workshop (November 12-13, 2008, JAXA/ISAS, Sagamihara, Japan)