J-PARC Facility

October 15, 2008
ATHIC2008, Tsukuba
J-PARC Overview
Shoji Nagamiya
J-PARC Center
High Energy Accelerator Research Organization (KEK)
Japan Atomic Energy Agency (JAEA)
1
October 15, 2008
ATHIC2008, Tsukuba
J-PARC Overview
Shoji Nagamiya
J-PARC Center
High Energy Accelerator Research Organization (KEK)
Japan Atomic Energy Agency (JAEA)
2
J-PARC Facility
GeV= 10９ electron volt
Materials and Life Science
Experimental Facility
Nuclear
Transmutation
Hadron Beam Facility
５００ｍ
(Phase 2)
Neutrino to
Kamiokande
Linac
(330m)
3 GeV Synchrotron
(25 Hz, 1MW)
50 GeV Synchrotron
(0.75 MW)
J-PARC = Japan Proton Accelerator Research Complex
Joint Project between KEK and JAEA
32
Location of J-PARC at Tokai
KAMIOKA
295 km
JAEA
JAERI
1 hour
Tokai
J-PARC
KEK
Tsukuba
TOKYO
NARITA
4
Goals at J-PARC
Need to have high-power
proton beams
 MW-class proton accelerator
(current frontier is about 0.1 MW)
Materials & Life Sciences at 3 GeV
Nuclear & Particle Physics at 50 GeV
R&D toward Transmutation at 0.6 GeV
5
50 GeV
Synchrotron
J-PARC Facility
(KEK/JAEA）
North to South
Accelerators
3 GeV
Synchrotron
Linac
CY2007 Beams
JFY2008 Beams
Bird’s eye photo in January of 2008
6
Linac（330ｍ）
50GeV Synchrotron（1600 ｍ）
3 GeV Synchrotron (350ｍ）
Superconducting magnets for the
neutrino beamline
7
Phase 1 and Phase 2
KEK Portion
JAEA Portion
– Phase 1 + Phase 2 = 1,890 Oku Yen (= $1.89 billions if $1 = 100 Yen).
– Phase 1 = 1,527 Oku Yen (= $1.5 billions) for 〜8 years.
– JAEA: 860 Oku Yen (56%), KEK: 667 Oku Yen (44%).
8
Construction Schedule
Construction
Start
Time when this
schedule was created
(J-PARC Center started)
Now
Open to
Users
9
Linac
3 GeV
Synchrotron
Neutrino Beams
(to Kamioka)
J-PARC Facility
(KEK/JAEA）
South to North
Experimental
Areas
Materials and Life
Experimental Facility
CY2007 Beams
JFY2008 Beams
JFY2009 Beams
Hadron Exp.
Facility
Bird’s eye photo in January of 2008
10
Materials and Life
Experimental Facility
Facility similar to SNS in the US
and to ISIS in the UK
11
Materials & Life Experimental Facility
Neutron Beam Lines
(23 total)
Neutron Scattering Area
Muon Experimental Area
Target Station
Proton
Beam
Scattered
Neutrons
Experimental
Devices
Proton Beam
12
The 1st Hall
Container
Mercury Target
for Neutrons
Muon
Production
Area
Rail
Experimental Hall
Muon Hall
Neutron
Source
The 1st Hall （Neutron Area）
The 2nd Hall
2008.5.30. First Neutrons
2008.12. Open to Users
13
Preparation of Neutron Equipments
• 23 beam liens are
available.
• Application for
equipment open to
public.
• About 10
equipments within
JFY2008.
IBARAKI Biological Crystal
Diffractometer
- Ibaraki Prefecture
Super High Resolution
Powder Diffractometer
(SHRPD) - KEK
Protein Dynamics
Analysis Instrument
(DIANA) – JAEA
Nuclear
Interaction
（Hokkaido、ＪＳＴ）
Beam Test
（JAEA）
Fundamental
physics
（KEK)
4d Space Access Neutron
Spectrometer(4SEASONS)
-Grant-in-Aid for Specially
-Promoted Research, MEXT,
Life
Science
Proton beam
High-intensity Versatile
Neutron Total Diffractometer
- KEK, NEDO
Materials
Science
IBARAKI Materials
Design Diffractometer
- Ibaraki Prefecture
High-intensity SANS (HISANS) - JAEA
Neutron Reflectometer with
Horizontal-Sample Geometry
- KEK
Engineering
Diffractometer
- JAEA
14
Example of Test Results in June, 2008
Obtained at
KEK KENS
Bragg Diffraction
Result at J-PARC
(world record)
Lattice distance
15
New Invention for Moderator
Neutron Source
Moderator
Neutrons
from
Reflector
Neutron
beams
Protons
Hydrogen
Toward
beamline
AIC Decoupler（blue）
Covers around the
entire surface
Ag,In,Cd
16
Muon Lifetime and Muon Rotation
September 26, 2008
Lifetime = 2.2 ms
Muon Spin Rotation in a Magnetic Field
17
Expected Power vs. Actual Power
November of 2003
Actual
1.5 years
ahead
Power at KEK-Booster = 3 kW
18
295 km
West
Super Kamiokande
Neutrino Experimental
Facility
Number of Users: about 400
(about 1/6 from Japan)
Experiments with Intense
Neutrino Beams
19
Neutrino Oscillation (T2K) Experiment
T2K J-PARC
Exp.
(295km)
Super ４０ｍ
Kamiokande
Electron Neutrino
タウニュートリノ
神岡町
一コマ
（岐阜県）
100 times sensitivity as
compared with K2K
100 neutrinos
大強度陽子加速器
J-PARC
Mu Neutrino
ミューニュートリノ
東海村
（茨城県）
For example
150 neutrinos
Dissapearance of neutrions ←→ Finite Mass
大気ニュートリノ
加速器ニュートリノ
Kamoka,
K2K,
MINOS,
etc.
nt
nm
Electron neutrinos
13
←→ Mixing between the 1st and 3rd generation
KamLAND, SNO
T2K
Mu neutrinos
太陽ニュートリノ
原子炉ニュートリノ
ne
CP violation experiment later by increasing intensity
Competition with FNAL and CERN !
20
Layout for Neutrino Experiment
p
p
n
2.5 o
0m
140 m
280 m
Future
negotiation
2 km
Included in
the budget
 Muon monitors @ ~140m
– spill-by-spill monitoring of
p-beam direction/intensity
 First Front detector @280m
– 0 degree definition
– High stat. neutrino inter. studies
 Second Front Detector @ ~2km
– Ultimate systematics
– Now fixing the site
 Far detector @ 295km
– Super-Kamiokande (50kt)
295 km
Neutrino spectra at diff. dist
1.5km
295km
Dominant Systematic
Error in K2K
0.28km
21
T2KK
Ishitsuka et al. PRD 72 (2005) 033003
sign(Dm2)
CP violation
Hyper-K
T2KK
(0.27+0.27Mt)
2s
3s
T2K-II
(0.54Mt)
Distance from the target (km)
Korea
JPARC
L=1000~1250km
OA 1.0~2.5deg
Kamioka
Off-axis angle
L=295km OA2.5deg
K. Hagiwara Nucl. Phys. Proc. Suppl. 137 84 (2004)
22
Production Area and Decay Volume
Buried under the ground.
Neutrino Area
Beams in
JFY2009
Production Area
（p + A p ）
Decay volume
（pmn）
23
Hadron Experimental
Facility
Number of Users: about 600
Experiments with Intense K-Meson
Beams (Kaon Factory)
24
Implantation of Hadron in the Nucleus
K
S-
Shrinkage
K- Bound State

S-
M. Angello, et al. PRL
94, 212303 (2005)
Nucleus
by 50% in radius
Y. Akaishi, et al. PL
B613, 140 (2005)
K Meson
High Res.
Exp.
Hyper nucleus

S-2
Shrinkage
by 20 % in radius
K. Tanida, et al. PRL 86
1982 (2001)
?
Quark
Anti-quark
Proton
or
Neutron
Day-1 Experiments at Hadron Facility
Partial
deconfinement
of quarks 
Mass change 
25
Pion Implantation
order parameter
Meson Implantation
p-Meson
RHIC
LHC
J-PARC
Inside nuclear matter
the order parameter
for pion could be
reduced by 1/3 (i.e.,
partial restoration of
chiral symmetry)
K. Suzuki, et al., Phys. Rev. Lett. 92, 072302 (2004)
26
Hadron Experimental Area
Now
Summer in 2007
Hadron Area
Beam within
JFY2008
27
World Center



ISIS
Materials and Life: One of three world centers, in particular, in Asia.
Hadron physics A unique kaon factory in the world.

World leading
Neutrino physics: As a world leader among the three world centers.
accelerator facility is
about to be completed.

Internationalization is,
however, the urgent
issue to solve!
FNAL
GSI
CERN
J-PARC
SNS
Center in neutrino
Center in neutrons
Hadron (Kaons)
Hadron (antiprotons)
Formation of
the world
center is the
next issue!
ISIS：英国ラザフォード研究所の中性子源、SNS：米国オークリッジ国立研究所の中性子源
CERN：欧州合同原子核研究機構、FNAL：米国フェルミ国立研究所
CERN：欧州合同原子核研究機構、FNAL：米国フェルミ国立研究所、GSI：ドイツ重イオン研究所
28
Major Upgrades under Discussions

Neutrons and Muons
– Neutron equipments: How to fill the 23 beamlines (so far about ten
were funded).
– Muon equipments: Among four beamlines, only one will be in operation
in 2008. Others have to be funded.

Hadrons
– Must construct several kaon beamlines plus a primary beamline.
– Hadron hall expansion (Phase 2: 60m in length to 100m): Necessary to
accommodate many user groups (Many requests on this at the Int.
Workshop (NP08) held on 5-7 March of 2008).

Neutrinos
– Power upgrade.
– The third detector (at 2 km from J-PARC or at Okinoshima/Korea).

Nuclear Transmutation
– The major item for Phase 2 … Main Goal for JAEA.

Others
– Energy upgrade to 50 GeV.
– Third extraction line or Fast Extraction at Hadron Hall?
– Polarized protons, heavy-ions, ….
29
30
31
32
Summary

Unique Accelerator Project
–
–
–
–

World class proton facility  Variety of secondary beams 
Multipurpose
Broad fields in Science (materials and Life, Nuclear and Particle,
Nuclear Industrial, etc.)  Interdisciplinary facility
Big facility with small users (over 1000 user groups)
Open to users for Materials and Life in December of 2008. Start to use
the hadron facility within JFY2008. Neutrino beams in JFY2009.
Open the Facility to International Scientific Communities
and Domestic Industries
–
–

Multi-purpose facility
Internationalization is still not sufficient. Need to improve this aspect.
Open to industries in the area of neutron sciences.
Future Issues: Production of Top-Level Scientific Results
–
–
–
–
Production of world leading results.
Operation of the facility as the User Facility.
International facility. Open to any countries in the world.
Easier access by the industries.
33
1995
Original
KEK
INS,
U. Tokyo
Meson Lab.
U. Tokyo
JAERI
JNC
1996
1997
1998
Present
KEK
(Govn’t Org.)
JHF
J-PARC
Neutron Project
Suggestion of
Joint Effort
1999
2000
Monbu-sho
STA
Construction Start
2001
MEXT (Ministry of Educ.,
etc. and Technologies)
2002
2003
2004
2005
2006
PS Operation
Neutrino Const. Start
Present
KEK
(Non Govn’t
Org.)
New rule for the
operational fund
J-PARC Center
New Joint Institution
(JAEA)
2007
Phase 1 Completion
2008
J-PARC Operation
Neutrino Start
JRR-3M Operation
34

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