the jem-euso mission to explore the extreme...
TRANSCRIPT
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The JEM-EUSO Mission to
Explore the Extreme Universe
Toshikazu Ebisuzaki
RIKEN
for the JEM-EUSO Collaboration
Extreme Universe Space Observatory
Yoshi Takahashi Memoria Symposium
June 25, 2010 at University of Alabama in Huntsville, USA
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JEM-EUSO is
the Astronomical Earth Observatory
EECRs
X, γ,ν,p,
e
UV, X, γ,ν
p, n, e
Charged
Particles
Ultraviolet photons
Plasma
Discahrge
Dust and
Meteors
Night
glow
Solar wind
The Earth
Atmosphere
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EUSO was born in 1999
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EUSO was selected by ESA
2000 Phase-A
• Europe:Phase-A Completed
– 2000-2004
• Japan:JAXA-RIKEN concept studies
– 1998-06
• USA: End-to-End MIDEX $36M
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ESA-EUSO Phase-A in USA
2003
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Space Shuttle Columbia disaster
occurred on February 1, 2003,
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JEM-EUSO was born: 2006
Advanced Optical
Fabrication for Analyzer
Technologies
2006 June 8-9 at RIKEN
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Kick-off Meeting
June 6-8 2007
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Third Meeting
June 13-18, 2008
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Fifth Meeting
June 22-25, 2009
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Seventh meeting
June 21-24, 2010
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JEM-EUSO Observational Principle
JEM-EUSO telescope observes
fluorescence and Cherenkov photons
generated by air showers created by
extreme energetic cosmic rays
JEM-EUSO is a new type of observatory
on board the International Space Station
(ISS), which observes transient luminous
phenomena occurring in the earth's
atmosphere.
The telescope has a super wide field-of-
view(60°) and a large diameter(2.5m).
JEM-EUSO mission will initiate particle
astronomy at ~1020eV.
Extreme
Energitic
Cosmic
Rays
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Japanese Experiment Module
“Kibo”:July 2009
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Robotic Arm
JEM Exposure Facility
・Number of ports: 10
・Power :120Vdc、Max10kW
・Communication:low speed(MIL-STD-1553B)
medium speed (Ethernet)、
High speed :FDDI)
・Coolant :controlled temperature 20±4℃
ELM/ES
Recycling of payload
Pressurized Module
Outline of JEM Exposure Facility
Payload
standard envelope:1.85m×1.0m×0.8m
mass : less than500kg
Airlock between Pressurized Module
and Exposure Facility
Candidate position
for JEM-EUSO
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H-II Transfer Vehicle (HTV)
©JAXA
HTV is 4m across and about 10 m long
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Successful Launch of HTV
September 11, 2009
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Field of View
x 5
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Mission Parameters
• Time of launch: year 2015
• Operation Period: 3 years (+ 2 years)
• Launching Rocket : H2B
• Transportation to ISS: un-pressurized Carrier of
H2 Transfer Vehicle (HTV)
• Site to Attach: Japanese Experiment Module/ Exposure Facility #2
• Height of the Orbit: ~400km
• Inclination of the Orbit: 51.64°• Mass: 1983 kg
• Power: 926 W (operative),
352 W (non-operative)
• Data Transfer Rate: 285 kpbs
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ISS Orbit
http://www.nlsa.com/
Inclination:
51.6°Height: ~400km
JEM-EUSO can observe the
arrival direction of EECR very
uniformly owing to the nature
of the ISS orbit.
Full-Sky Coverage
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JEM-EUSO Launch Configuration
PIU
FRGF for JEM-
RMS
Clearance for JEM-RMS
access
PVGF for SSRMS
Required Envelope
1859
[mm]
3705 [mm] 2044 [mm]
WheelTSM-EP
TSM: Tie-down Separation Mechanism
HSM: Harness Separation Mechanism
HDM: Hold Down Mechanism
HDM Trunnion
HSM-EP
PIU
FRGF for JEM-
RMS
Clearance for SSRMS access
RMS: Remote Manipulator System
SS: Space Station
JEM-EUSO telescope will be squeezed at launch.
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FrontFresnel Lens
JEM-EUSO On-orbit Configuration
Focal Surface and Sensors with Ring
RearFresnel Lens w/ Ring
FlatLens w/ Ring
3767.7
[mm]
946.8 [mm]
798.4 [mm]
163.5 [mm]
Telescope Barrel is not shown.
Tilted Position
JEM-EUSO telescope will be elongated on orbit.
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Extension Mechanism
•NGST Inc. ISIS mast
23
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Science Objectives
• Fundamental Objective
Extreme energy astronomy by particle channel
Determine their origin and the acceleration mechanism
• Exploratory Objectives–Detection of extreme energy gamma rays
–Detection of extreme energy neutrinos
–Study of the galactic magnetic field
–Verification of the relativity and the quantum gravityeffect in extreme energy
–Global observations of nightglows, plasma discharges and lightning
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E>1020 eV particles do not bent
We can specify origin of EECRs by arrival
direction
銀河内の伝播シミュレーション
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Arrival Map
AGASA
1995
PAO
2007
•Identify the sources
•Confirmation of GZK
•Clarify acceleration mechanism
シミュレーション
シミュレーション
STAR Burst
Galaxies
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Possible Sources
Gannma-burst
Active
Galaxies
Radio gakaxy
27
Blackhole related objects
Unknown
sources
New mechanism of
acceleration
Wakefield?
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EECR Energy Spectra
for Various Source Distance
Medina-Tanco 2008
The energy spectra at around 1020 eV differs for different source
distances affected by the GZK process.
Final Confirmation of GZK effect
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Energy Spectrum from Auger Observatory
Five-parameter fit: index, breakpoint, index, critical energy, normalization
Schuessler
HE 0114
SD + FD
Physics Letters B
685 239 2010
Above 3 x 1018 eV, the exposure is energy independent: 1% corrections in overlap region
Total sky spectrum
GZK or acceleration limit?
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Exposure Evolution
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• International Space Station-aboard
EECR observatory
– Orbiting at ~400 km
in ±51.6 degrees latitudes
– Flight in varying geomagnetic field
(~0.6 gauss) around orbit
• Viewing night atmosphere
in ~500 x 400 km area (nadir mode)
– Wide FOV allows to measure entire
slowly developing showers
– Target volume exceeding an order
of 1012 tons
FOV above Okayama
Tilt mode(~30o)
JEM-EUSO as gamma ray
& neutrino observatory
Nadir mode
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Extreme Energitic Cosmic Neutrinos
Neurino production by the GZK process
Air showers initiated by different kind
of neutrinosNeutrino fuxes for various models
and detection capability of
JEM-EUSO
Exploratory Objectives
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Neutrino shower simulation
• Gamma ray showers
– CONEX with....
• Neutrino showers for pilot studies
– Horizontally incident
– PYTHIA interaction code
for neutrino-nucleon interaction
– CONEX code connected
for shower in atmosphere
Horizontally incident neutrinos
(discussed in present work) Survival prob. to come in FOV
Neutrino: ~exp(-0.001)
Proton: ~exp(-1000) for 1020 eVhorizontal proton showers
hardly reach JEM-EUSO FOV
CONEX code used for
shower simulation in
atmosphere
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Expected sensitivity
on gamma ray fraction
N
Nc
cγmin=
4
u12
u1 v2
N
v1
N
211 u 2
1
2
2431 v2
242 v
)()( maxmaxmax1 XfXPdX
)()( maxmaxmax2 XfXPdX pr
)()( max
2
maxmax3 XfXPdX
)()( max
2
maxmax4 XfXPdX pr
)()(
)()(
maxmax
max
maxXfXf
XfXP
pr
cX
A
c
A XfdXXFmax
)()( maxmaxmax
N
i
i
X XPN 1
max )(1
max
cX
A
c
A XfdXXFmax
)()( maxmaxmax
)(
))(()(
max
max
max c
c
prc
ULXFN
XFNNXF
cX
A
c
A XfdXXFmax
)()( maxmaxmax
NF /1min )1(1
M-I
M-II
Ideal case
• Ideal case (only statistics): Xmax strong discriminator for gamma ray
• More realistic estimate (assumed experimental errors in Xmax)
using 2 different approaches to evaluate flux limit
→ New and stringent limit expected @ the highest energies (~1020eV)
– Possible detection of GZK photons during the Mission
Expected limit by 5 year mission
compared with upper limits set by
existing experiments (95%CL)
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Atmospheric Luminous Phenomena
Various trangent airglows
OH airlow observed from ground
Leonid meteor swarm in
2001 taken by Hivison
camera
Lightning picture observed from ISS
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Conceptual View of
JEM-EUSO Telescope
36
FoV: 60°F/1.0
Diameter: 2.65m~1.9m
Obs. wavelength: 330nm~400nm
Lens material: CYTOP
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Fresnel Lens #2
Precision Fresnel lens
Iris
Fresnel lens #1
DAQ Electronics
Support Structure: Italy + France
Focal Surface: Japan
Calibration: Japan + France
Simulation: Worldwide
Optics: USA + Japan
37
International Role Sharing
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OpticsSample cutting test
Surface roughness < 20nmRMS
(Requirement : ±72 nm)
Surface roughness
20cm
Close up
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Optics
1.5m φ
2.65 m φ
1.5 m φ
We obtained a cutting machine with a 3.4m dia. turn table
to make a 2.65m dia. Fresnel Lens.
Manufacturing large
diameter Fresnel Lens
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リアレンズ(第3レンズ)(2008年末完成)
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Middle lens (第2レンズ)
Before washing
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Focal Surface Detector
(148PDMs = 0.2M pixels)
2.6 m max
MAPMT
(6x6 pixels)
26.2
mm
Radiation test and Vibration
test has been done
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New MAPMT M64
M36
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Air shower Image on the Focal Surface
50 events of 1020eV proton
showers are superimposed
on the EUSO focal surface
with 192 k pixels.
x-t view y-t view
4
simulation
X
Y
time(sec)
photo
elec
trons
Proton E=1020eV, =60º
GTU = 2.5 sec
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JEM-EUSO DAQ – Data reduction block scheme
FEE
ASIC+
FPGA
Count
PDM Control
Board
FPGA
Track Trigger
Cluster
Control Board
DSP
Fine Trigger
20CCB
FS Control
Board
MPU
Operation
Control
160 Boards 20 Boards
8PDM
2 Boards200kch
1,476 EC
9EC
LVDS with SpaceWire (ECSS-E-50-12A)Poster: [143] The trigger system of the JEM-EUSO Telescope, BERTAINA, CATALANO G-12
Oral: [153] The data acquisition and handling system of the Jem-Euso experiment, M. CASOLINO
297 kbps
3 Gbyte/day
9.6 GB/s (FS)
PhotoDetect
or Modules
4*10-3 compression 10-3 compression
Storage on SSD will give
factor 3, up to 10 Gbyte/day
Return with Soyuz
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JEM-EUSOEUSO:Ever Largest Refractive Telescope
焦点面: 日本
電子回路: 欧州、韓国、日
本
光学系 : 米国・理研
構造体: 日本
ミッション主体: JAXA
102cm
口径250cm1897
2015
250cm
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Principle of Relativity
Principle of Relativity: Galileo
Galilei: There are no
differences in physical laws at
any velocity
Theory of Relativity: Einstein:
Lorentz Invariance
Must be violated!
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proton
E = 1020 eV
2.7K CMB
neutron
pe
ne
n
protonene
n
Greisen-Zatsepin-Kuz’min ProcessGreisen1966; Zatsepin and Kuz’min1966
Microwave Cosmic Background
Radiation
Gamma Beam Energy (GeV)
Cro
ss S
ect
ion (m
b)
0.1
0.01
γ + p→Δ (1232)→ π o p or π + n
Gamma Beam Energy (GeV)
Cro
ss S
ect
ion (m
b)
0.1
0.01
γ + p→Δ (1232)→ π o p or π + n
Gamma Beam Energy (GeV)
Cro
ss S
ect
ion (m
b)
0.1
0.01
γ + p→Δ (1232)→ π o p or π + nγ+p→Δ→π0+p、π++n
2.725 K
410 photons / cm3
Test of Lorentz Invariance at~1011
Sato and Tati 1972
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SummaryThree Challenges
• Challenge to Astronomy through Charged Particle– Clarify Origin of EECR by Arrival Direction
– Huge Accelerators in the Universe
• Challenge to the limit of the Fundamental Physics
– Lorentz invariance at the highest extreme (γ~1011)
– Detection of gamma-rays and neutrinos
• Challenge to the Largest Refractive Telescope on orbit
– Super Light weight Fresnel Lenses
– Super fast Focal Surface Detectors
Completion of Japanese Experiment Module KIBO
Successful Launch of HTV
JEM-EUSO Launch in 2015
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Backup
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S Swordy
(Univ. Chicago)
25 decades
in intensity
11 Decades
in Energy
1 particle m-2 s-1
‘Knee’
1 particle m-2 per year
Ankle
1 particle km-2 per year
Flux of Cosmic Rays
Air-showers
LHC
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proton
E = 1020 eV
2.7K CMB
neutron
pe
ne
n
protonene
n
Greisen-Zatsepin-Kuz’min ProcessGreisen1966; Zatsepin and Kuz’min1966
Microwave Cosmic Background
Radiation
Gamma Beam Energy (GeV)
Cro
ss S
ect
ion (m
b)
0.1
0.01
γ + p→Δ (1232)→ π o p or π + n
Gamma Beam Energy (GeV)
Cro
ss S
ect
ion (m
b)
0.1
0.01
γ + p→Δ (1232)→ π o p or π + n
Gamma Beam Energy (GeV)
Cro
ss S
ect
ion (m
b)
0.1
0.01
γ + p→Δ (1232)→ π o p or π + nγ+p→Δ→π0+p、π++n
2.725 K
410 photons / cm3
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Energy Estimates are
model and mass dependent
Takeda et al. ApP 2003
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Side cut type for the HTV stowing
2.5m
2.65m1.9m
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New MAPMT M64
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New MAPMT M64 Gain Map
Individual Anodes Sum
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New MAPMT M64 Gain Map
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All vertical scales are 0 to 10, except pix 5 (central) which is 0 to 100
クロストーク特性
新M64 5.8%
旧M36 33%
Gain
5.9x105
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単ピクセルS/√N比 (イベントトリガに大きく寄与)
変化
ピクセルサイズ 4mm 2.8mm 3/4倍
クロストーク 33% 5.8% 1/5倍
S/√N比
1.33倍
1.4倍
望遠鏡シミュレーションに反映させ、パフォーマンスを確認中。
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Structure
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13
0167
167
128
16
71
92
.4
28
.7
Volume for Electronics
(167 x 128 x 130)
PDM Frame
PDM Dimensions (mm)
EC BaseMAPMT
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Boards for Electronics
EC Level
PDM Level
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Al 7075-T7351
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FS Structure – Front view
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FS Structure – Rear view
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high cloud
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TOVS cloud presence
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69
The Auger Sky above 60 EeVComparison with Swift-BAT AGN density map
Simulated data sets based on isotropy (I) and Swift-BAT
model (II) compared to data (black line/point).
5° of smoothing
To March 2009, 58 events above 6x 1019 eV
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Swift-Bat catalogue
Top: Flux-Weighted
Bottom: Unweighted
Smearing takes account of
angular resolution and deflections
Maximum Likelihood fit
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A clear message from the Pierre Auger Observatory is
that we made it too small: Need Auger North and JEM-EUSO
Rate of events that seem to be anisotropically distributed
is only ~ 2 per month
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• DMSP衛星による「夜の地球」の観測データベースから– 30”角グリッド(~JEM-EUSOの<位置分解能>)での年間平均の可視光の強度データ
市街光
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サイパン近海 西部オースラリア (砂漠)ヒマラヤ山脈
オージェサイト周辺 (草原) 中部ヨーロッパ関東・東海
• 小規模の街・都市部:背景光の数倍程度以上の市街光• 山岳地帯・砂漠・草原など:海上からの背景光と同レベルの強度
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Japan : T. Ebisuzaki, Y. Uehara, H. Ohmori, Y. Kawasaki, M. Sato, Y. Takizawa, K. Katahira, S. Wada, K. Kawai, H. Mase (RIKEN), F. Kajino, M.
Sakata, H. Sato, Y. Yamamoto, T. Yamamoto, N. Ebizuka, (Konan Univ.), M. Nagano, Y. Miyazaki (Fukui Inst. Tech.), N. Sakaki, T. Shibata (Aoyama
Gakuin Univ.), N. Inoue (Saitama Univ.), Y. Uchihori (NIRS), K. Nomoto (Univ. of Tokyo), Y. Takahashi (Tohoku Univ.), M. Takeda (ICRR, Univ.
Tokyo), Y. Arai, Y. Kurihara, H.M. Shimizu, J. Fujimoto (KEK), S. Yoshida, K. Mase (Chiba Univ.), K. Asano, S. Inoue, Y. Mizumoto, J. Watanabe, T.
Kajino (NAOJ), H. Ikeda, M. Suzuki, T. Yano (ISAS, JAXA), T.Murakami, D. Yonetoku (Kanazawa Univ.), T. Sugiyama (Nagoya), Y. Ito (STEL,
Nagoya Univ.), S. Nagataki (YITP, Kyoto Univ.), A. Saito(Kyoto Univ.), S. Abe, M. Nagata (Kobe Univ.), T. Tajima (KPSI, JAEA)、M. Chikawa (Kinki
Univ.), and M. Tajima (Hiroshima Univ.)
USA : J. H. Adams Jr., S. Mitchell, M.J. Christl, J. Watts Jr., A. English, R. Young (NASA/ MSFC) , Y. Takahashi, D. Gregory, M. Bonamente, P.
Readon, V. Connaughton, K. Pitalo, J. Hadaway, J. Geary, R. Lindquist, P. Readon (Univ. Alabama in Huntsville), H. Crawford, C. Pennypacker
(LBL, UC Berkeley), K. Arisaka, D. Cline, J. Kolonko, V. Andreev (UCLA), T. Weiler, S. Csorna (Vanderbilt Univ.),
France : J-N. Capdevielle, P. Gorodetzky, D. Allard, J. Dolbeau), T. Patzak, J.J. Jaeger, E. Parizot, D. Semikoz, J. Weisbard
(APC,IN2P3,CNRS ), S. Dagoret-Campagne (LAL,IN2P3,CNRS)
Germany: M. Teshima, T. Schweizer (MPI, Munich), A. Santangelo, E. Kendziorra, F. Fenu (Univ. Tuebingen), P. Biermann (MPI Bonn), K.
Mannheim (Wuerzburg), J. Wilms (Univ. Erlangen)
Italy : E. Pace, M. Focardi, P. Spillantini (U. Firenze) V.Bratina, A. Zuccaro, L. Gambicorti (CNR-INOA Firenze), A. Anzalone, O. Catalano, M.C.
Maccarone, P. Scarsi, B. Sacco, G. La Rosa (IAS-PA/INAF), G. D’Ali Staiti, D. Tegolo (U. Palermo), M. Casolino, M.P. De Pascale, A. Morselli, P.
Picozza, R. Sparvoli (INFN and Univ. Rome “Tor Vergata”), P. Vallania (IFSI-INAF Torino), P. Galeotti, C. Vigorito, M. Bertaina (U. Torino), A.
Gregorio (Trieste), F. Isgro, F.Guario, D. D’urso, D. Supanifsky (U. “Federico II” di Napoli), G. Osteria, D. Campana, M. Ambrosio, C. Aramo (INFN-
Nappli)
Mexico: G. Medina-Tanco, J.C. D’Olivo, J.F.Valdes (Mexico UNAM), H. Salazar, O. Martines (BUAP), L. Villasenor (UMSNH)
Republic of Korea : S. Nam, I. H. Park, J. Yang (Ehwa W. Univ.), T.W. Kim (Ajou University), S.W. Kim (Yonsei University), K.K. Joo
(Chonnam National University)
Russia: Garipov G.K., Khrenov, B.A., Klimov P.A. Panasyuk M.I., Yashin I.V. (SINP MSU), D. Naumov, Tkachev. L (Dubna JINR)
Switzerland : A. Maurissen, V. Mitev (Neuchatel, Switzerland) :
Spain: D.Rodriguez-Frias, L.Peral, J.Gutierrez, R.Gomez-Herrero (Univ. Alcala)
Poland: T. Batsch, B. Szabelska, J. Szabelski, T. Wibig(IPJ), T. Tymieniecka(Podlasie Univ.), Z. Wlodarczyk(Kielce Univ.), G. Siemieniec-
Ozieblo(Jagiellonian Univ.)
Slovakia: K. Kudela, R. Bucik, R. Bobik, M. Slivka (Inst. Experimental Physics, KOSICE)
12 countries, 62 institutions, 170 members
JEM-EUSO Collaboration
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Nature has been unkind (?)
AND
we chose a poor catalogue