1

Status of J-PARC

Shoji Nagamiya

J-PARC Center

Japan Atomic Energy Agency (JAEA)High Energy Accelerator Research Organization (KEK)

February 9, 2011Workshop on 'Future Prospects of Hadron Physics at J-PARC and Large Scale Computational Physics'

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Power Capability J-

PA

RC

Pow

er

Exp

ecta

tion

　[M

W]

JFY2008 JFY2009 JFY2010 JFY2011 JFY2012 JFY2013 JFY2014

Linac Energy Recovery

Training

120 kW steady

300 kW 1 hour

PreviousEstimate

Nov. 2003PresentEstimatefor 3 GeV

PresentEstimate

for MRat 30 GeV

200 kW steady

115 kW steady

KEK PS　 3 kW

Big Earthquake

145 kW

3

Indication of e appearance (non-zero 13)

3

3

Expected BG

1.5±0.3evts

6 e candidates found!

(m232>0) (m23

2<0)

Central value

90%CL range

Prob. of 6 are all BG: 0.7% (2.5 equiv)

Allowed region

Chooz 90% upper bound

4

Measurement of disappearance(m23

2, sin22)

(GeV)

Consistent with MINOS/SK results

Reconstructed energy

Clear disappearance and oscillation pattern observed!!

Num

ber

of

Eve

nts

Rat

io

m2 (eV2) sin2(2)

Analysis A 2.1 ~ 3.1 x 10-3 > 0.85Analysis B 2.1 ~ 3.2 x 10-3 > 0.84

90% C.L. allowed region sin22

m2

(eV

2)

Best-fit (m2, sin22) Ana. A (2.6x10-3eV2 , 0.99) Ana. B (2.6x10-3eV2 , 0.98)

(Analysis A)

(Analysis B)

Analysis A

Analysis B

Single ring events•104 events expected w/o osc• 31 events detected

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Physics Motivation J-PARC E19

positive evidences at low energy (LEPS, etc.) very narrow width ~ 1 MeV. Why? negative results at high energy

T. Nakano et al.,PRC79 (2009) 025210

uーs u

d

d Hadronic “direct reaction”- + p K- + X Previous (-,K-) missing mass spectrum shows a hint of 2.6

d K+ K- p n

12±2 nb

p(-,K-)

E19 (Naruki et al.)E19 (Naruki et al.)

Search for Pentaquark Search for Pentaquark + + in in ––ppKK––X reactionX reaction

K++n Experiment to producedirectly ++ must be done.

Peak???

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LINAC-1

Outside of LINAC building is heavily damaged.

We are getting water from an outside fire-hydrant, as original cooling water system has not yet been fixed.

Immediately after the Earthquake

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LINAC-2

Placing a temporal bridge for carrying in materials for repair.

Many pipes for supplying cooling

water were damaged.

8

Realigned accelerator cavities of DTL and SDTL were tested for water-tightness.

・ The floor level sagged 4 cm downward in the tunnel. Because accelerator cavities should be aligned within ±1 mm to each other along the beam line for the operation, they have been leveled and realigned where necessary. ・ Restoration work on the cooling water system and power supply is going smoothly.

LINAC-3

9

3 GeV Synchrotron (RCS)

The bent stage was repaired. Power has been supplied to the RCS building.

Immediately after the Earthquake

Tilted condenser transformers were straightened.

Immediately after the Earthquake

newold

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J-PARC Facility

Nuclear Transmutation

(Phase 2)

Joint Project between KEK and JAEA 2

Materials and Life ScienceExperimental Facility

Hadron Beam Facility

５００ｍ

Linac(330m)

Neutrino to Kamiokande

3 GeV Synchrotron(25 Hz, 1MW) 50 GeV Synchrotron

(0.75 MW)

J-PARC = Japan Proton Accelerator Research Complex

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A tilted He tank was removed to repair the foundation.

The road was re-opened after filling depressions with pebbles. Inspection by the fire department

Materials & Life Science Experimental Facility (MLF)-1

Immediately after the Earthquake

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Reassembling work of shielding blocks for neutron beams in the 2nd experimental hall (above). Inspection of the inside of the muon beam facility after removing shielding blocks (right). This area does not have any serious damage.

Materials & Life Science Experimental Facility (MLF)-2

Immediately after the Earthquake

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Materials & Life Science Experimental Facility (MLF)-3

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Realignment work of electromagnets (above) and superconducting magnets (below) is progressing smoothly. We also try to improve cooling power.Repairing roads and plumbing

have been completed.

Neutrino Experimental FacilityImmediately after the Earthquake

AC device tilted toward a depression of a road. Many pipes were damaged

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Immediately after the

Earthquake

Repairing roads and

plumbing have been

completed.

Hadron Experimental Facility

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　　　　　　　　 4 　　　　　 5 　　　　　 6 　　　　　 7 　　　　　 8 　　　　　 9 　　　　　 10 　　　　 11 　

　　　 12 　　　　 1 　　　　　 2 　　　　　 3

Infrastructure

Linac

RCS

MR

MLF

HD

NU

Emergency Recovery Full Recovery Work

MLF User Program

InvestigationRecovery

Test with electricity

New Hg TargetShielding recovery BL Components

MLF User Operation

　 NU Experiment

Cooling Water

Alignment

Recovery

Extended Building

2011 2012

NU or HD Operation

Beam TestUser Operation

Start

3GeV synchrotron

50GeV synchrotron

Materials&LifeExperimental Facility

Hadron Experimental Facility

Neutrino Experimental Facility

Investigation

Investigation

Investigation

Investigation

Investigation

Recovery

Recovery

Recovery

Beam Commissioning

Test with electricity

Test with electricity

Beam Injection

Beam Injection

Beam Injection

　 HD Experiment

J-PARC Recovery Schedule 　（ @2011.5.20 ） 2011 2012

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Summary before December 9th of 2011

Main Buildings were almost OK– Many underpins for major buildings.

However, many utility buildings, roads, and added buildings had significant damage.– We used approximately 50 Oku Yen from a regular

operational budget. – In addition, we received 14.2 Oku Yen (JAEA) for

immediate use and 73.4 Oku Yen (KEK) for 3 yrs. When to recover ?

– Aiming at recovering by the end of this year. – Obtained already a permission of 55 MW from Nov.

Operation of Next Fiscal Year– Aiming towards 9 cycle (200 day) operations for users.

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December 9, 2011

09:30 Key was on.

14:00 Beam went throughout the Linac at 3 MeV with RFQ acceleration.

Nov. of 2006. The first beamwas on at the Linac.

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Final vacuum leakage test Linac Alignment

302　kW　@　3NBT

DCCT

Particles/pulse

Time　(ms)

Injection Extraction

Acceleration

Linac and 3 GeV

HorizontalVertical

Linac: Beam was ben in the middle This will be straighten up in the future.

3 GeV: Although magnets are declined inward, they will not be corrected before the summer of 2013.

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Old and New Targets

Neutron on the Target

Unfortunately, the bubbler is no working properly, so that the neutron beam line can accept 100 kW at the time of first beams.

Before Earthquake

After Earthquake

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The first shot on target after the earthquakeAdjustment on beam positon:12/22

First shot reached on target because of the effort on realignment of 108 magnets in 3NBT.

The first shot

After adjustment

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Neutrino Events

On-site Detectorevents

First Protonon Target

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First Beams to Hadron (1/28)

調整後、ビームは軸の中心を通った。

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The First Beam to K1.8

ビームの信号をみる実験グループメンバー

Beam=BH1⊗ BH2

Beam⊗ TOF

Beam⊗ LC⊗ACbar⊗ TOF

Veto=TOF⊗AC

オンラインモニタを見る実験者たち

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Year 2012

Year 2012 Plans until March

Jan.

Feb.

Mar.

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JFY2012 Budget

JAEA Oku Yen

Operational 83.50 8 cycles. JAEA direct = 5.29

Gov. Direct = 78.21 (+3.6 for cost

increase of electricity)

Equipment 14.90 14.5 for JAEA: 400 MeV Linac

0.4 for Gov. Direct.: 16 Oku total

out of 3-year funding.

Improvement 16.92 Linac + 3 GeV (final year of total 47.9)

KEK Operational 66.18 6 cycles. The same as the last year.

CROSSOperational 7.02 Almost the same as the last year.

TOTAL 188.52

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Construction Budget

2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 20122000JAEA　KEKJAEA　KEKJAEA　KEK JAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　0

20

40

60

80

100

120

140

160

180

200

ConstructionStarted

Completionof Phase-1

Oku

Yen

(億

円)

Fiscal Year ( 予算年度 )

KEK ConstructionKEK After ConstructionKEK ConstructionKEK After Construction

JAEA ConstructionJAEA After ConstructionJAEA Government Direct JAEA Government Supplemental

JAEA ConstructionJAEA After ConstructionJAEA Government Direct JAEA Government Supplemental

EarthquakeRecovery

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Operational Budget

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 20172005JAEA　KEKJAEA　KEKJAEA　KEK JAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　KEKJAEA　0

20

40

60

80

100

120

140

160

180

200

Completionof Phase-1

Full Power(9 cycles; 200 days)5 cycles

6 cycles

JAEA GoalJAEA GoalKEK GoalKEK Goal8 cycles

6 cycles

JAEA OperationalJAEA Government DirectKEK Operational

JAEA OperationalJAEA Government DirectKEK Operational

Oku

Yen

(億

円)

Fiscal Year ( 予算年度 )

70% of full request

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99.5 % Extraction for Slow Beams

AdjustingDynamic Bump

Extraction Efficiency98.6%

Start of Extraction

End of Extraction

Stored Beam in MR

Time Dependence of Beam Loss

Stored Beam in MR

Time Dependence of Beam Loss

Start of Extraction

End of Extraction

Extraction Efficiency99.5 %

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KL

K1.8

K1.8BR

T1 target

30GeV proton beam

SKS We have observedcharged and neutral kaonsin the secondary beam lines(K1.8BR, K1.8 and KL) ofHadron Experimental Hall.

π

K+1.8GeV/c

K0L→π+π-π0

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E03 K. Tanida SNU Measurement of X rays from - Atom Stage 2 　 　K1.8 preparation

E05 T. Nagae Kyoto USpectroscopic Study of -Hypernucleus, 12

Be, via the 12C(K-, K+) Reaction

Stage 2 Day1 1 K1.8 preparation

E06 J. Imazato KEKMeasurement of T-violating Transverse Muon Polarization in K+ ->π0µ+ Decays

Stage 1 　 　K1.1BR 　

E07K. Imai, K. Nakazawa, H. Tamura

JAEA, Gifu U,Tohoku U

Systematic Study of Double Strangeness System with an Emulsion-counter Hybrid Method

Stage 2 　 　K1.8 preparation

E08 A. Krutenkova ITEP Pion double charge exchange on oxygen at J-PARC Stage 1 　 　K1.8 　

E10A. Sakaguchi, T. Fukuda

Osaka U, Osaka EC U

Production of Nuetron-Rich Λ-Hypernuclei with the Double Charge-Exchange Reactions

Stage 2 　 　K1.8 preparation

E11 T. Kobayashi KEKTokai-to-Kamioka (T2K) Long Baseline Neutrino Oscillation Experimental Proposal

Stage 2 　 　neutrino data taking

E13 T. Tamura Tohoku U Gamma-ray spectroscopy of light hypernuclei Stage 2 Day1 2 K1.8 preparation

E14 T. Yamanaka Osaka U Proposal for KL -> p0 -bar Experiment at J-PARC Stage 2 　 　KLbeamline tuning

E15M. Iwasaki, T. Nagae

RIKEN, Kyoto U

A Search for deeply-bound kaonic nuclear states by in-flight 3He(K-, n) reaction

Stage 2 Day1 　K1.8BR preparation

E16 S. Yokkaichi RIKENElectron pair spectrometer at the J-PARC 50-GeV PS to explore the chiral symmetry in QCD

Stage 1 　 　high p 　

E17R. Hayano, H. Outa

U Tokyo, RIKEN

Precision spectroscopy of Kaonic 3He 3d->2p X-rays Stage 2 Day1 　K1.8BRbeamline tuning

E18H. Bhang, H. Outa, H. Park

SNU, RIKEN, KRISS

Coincidence Measurement of the Weak Decay of 12C

and the three-body weak interaction processStage 2 　 　K1.8 preparation

E19 M. Naruki KEKHigh-resolution Search for + Pentaquark in -p -> K-X Reactions

Stage 2 Day1 　K1.8 data taking

E21 Y. Kuno Osaka UAn Experimental Search for Lepton Flavor Violating µ−

−e− Conversion at Sensitivity of 10−16 with a Slow-Extracted Bunched Proton Beam

Stage 1 　 　new beamline

　

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E22S. Ajimura, A. Sakaguchi

Osaka UExclusive Study on the Lambda-N Weak Interaction in A=4 Lambda-Hypernuclei (Revised from Initial P10)

Stage 1 　 　K1.8 　

E26 K. Ozawa KEKSearch for ω-meson nuclear bound states in the π-+AZ -> n+(A-1)(Z-1) ω reaction, and for ω mass modification in the in-medium ω->π0γ decay.

Stage 1 　 　K1.8 　

E27 T. Nagae Kyoto USearch for a nuclear Kbar bound state K-pp in the d(π+, K+) reaction

Stage 2 　 　K1.8 preparation

P28 H. Fujioka Kyoto UStudy of isospin dependence of kaon-nucleus interaction by in-flight 3He(K- ,n/p) reactions

approved as apart of

E15　 　K1.8BR 　

E29 H. Ohnishi RKENSearch for φ-meson nuclear bound states in the pbar + Z -> φ + φ(Z-1) reaction

Stage 1 　 　K1.1 　

E31 H. NoumiRCNP, Osaka U

Spectroscopic study of hyperon resonances below KN threshold via the (K- ,n) reaction on Deuteron

Stage 1 　 　K1.8BR 　

P34N. Saito, M. Iwasaki

KEK, RIKEN

A New Measurement of the Muon Anomalous Magnetic Moment g-2 and Electric Dipole Moment at J-PARC

Stage 1 MLF

P36 S. Shimizu Osaka UMeasurement of (K+ -> e+)/(K+ -> +) and Search for heavy sterile neutrinos using the TREK detector system

Stage 1 K1.1BR

E40 K. Miwa Tohoku U Measurement of the cross sections of Σp scatterings Stage 1 　 　K1.8 　

T25 S. Mihara KEKExtinction Measurement of J-PARC Proton Beam at K1.8BR

Test experiment

　 　K1.1BR data taking

T32 A. Rubba ETH, Zurich

Towards a Long Baseline Neutrino and Nucleon Decay Experiment with a next-generation 100 kton Liquid Argon TPC detector at Okinoshima and an intensity upgraded J-PARC Neutrino beam

Test experiment

　 　K1.1BR data taking

P35 T. Kajita ICRR, TokyoA test experiment to measure sub-GeV flux in the on-axis direction at the J-PARC neutrino beam

to be decided by E11 & Lab

　 　neutrino 　

T37 K. Inami Nagoya U Test of TOP counter for B-factory upgradeTest

experiment　 　K1.1BR withdrawn

T38 T. Nanjo Kyoto UProposal for Measuring Hadron Response at K1.1BR for KOTO Experiment

Test experiment

　 　K1.1BR completed

P39 K. Sakashita KEKA study of water Cherenkov detector for counting the number of neutrino at Near detector hall of J-PARC neutrino beam-line

to be decided by E11 & Lab

　 　neutrino 　

T43 K. Aoki RIKENTest of Hadron Blind Detector and GEM Tracker for the J-PARC E16 Experiment

Test experiment

K1.1BR

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E22S. Ajimura, A. Sakaguchi

Osaka UExclusive Study on the Lambda-N Weak Interaction in A=4 Lambda-Hypernuclei (Revised from Initial P10)

Stage 1 　 　K1.8 　

E26 K. Ozawa KEKSearch for ω-meson nuclear bound states in the π-+AZ -> n+(A-1)(Z-1) ω reaction, and for ω mass modification in the in-medium ω->π0γ decay.

Stage 1 　 　K1.8 　

E27 T. Nagae Kyoto USearch for a nuclear Kbar bound state K-pp in the d(π+, K+) reaction

Stage 2 　 　K1.8 preparation

P28 H. Fujioka Kyoto UStudy of isospin dependence of kaon-nucleus interaction by in-flight 3He(K- ,n/p) reactions

approved as apart of

E15　 　K1.8BR 　

E29 H. Ohnishi RKENSearch for φ-meson nuclear bound states in the pbar + Z -> φ + φ(Z-1) reaction

Stage 1 　 　K1.1 　

E31 H. NoumiRCNP, Osaka U

Spectroscopic study of hyperon resonances below KN threshold via the (K- ,n) reaction on Deuteron

Stage 1 　 　K1.8BR 　

P34N. Saito, M. Iwasaki

KEK, RIKEN

A New Measurement of the Muon Anomalous Magnetic Moment g-2 and Electric Dipole Moment at J-PARC

Stage 1 MLF

P36 S. Shimizu Osaka UMeasurement of (K+ -> e+)/(K+ -> +) and Search for heavy sterile neutrinos using the TREK detector system

Stage 1 K1.1BR

E40 K. Miwa Tohoku U Measurement of the cross sections of Σp scatterings Stage 1 　 　K1.8 　

T25 S. Mihara KEKExtinction Measurement of J-PARC Proton Beam at K1.8BR

Test experiment

　 　K1.1BR data taking

T32 A. Rubba ETH, Zurich

Towards a Long Baseline Neutrino and Nucleon Decay Experiment with a next-generation 100 kton Liquid Argon TPC detector at Okinoshima and an intensity upgraded J-PARC Neutrino beam

Test experiment

　 　K1.1BR data taking

P35 T. Kajita ICRR, TokyoA test experiment to measure sub-GeV flux in the on-axis direction at the J-PARC neutrino beam

to be decided by E11 & Lab

　 　neutrino 　

T37 K. Inami Nagoya U Test of TOP counter for B-factory upgradeTest

experiment　 　K1.1BR withdrawn

T38 T. Nanjo Kyoto UProposal for Measuring Hadron Response at K1.1BR for KOTO Experiment

Test experiment

　 　K1.1BR completed

P39 K. Sakashita KEKA study of water Cherenkov detector for counting the number of neutrino at Near detector hall of J-PARC neutrino beam-line

to be decided by E11 & Lab

　 　neutrino 　

T43 K. Aoki RIKENTest of Hadron Blind Detector and GEM Tracker for the J-PARC E16 Experiment

Test experiment

K1.1BR

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Hypernucleus

Shallow Potential

Deep potential + Heavier mass ?

spd

sp

ΛＮ

30 MeV 50 MeV s1/2

p1/2 p3/2

Vl･s

r

m

r

m

rnucleus rnucleus

Small (l ・ s) Force)

Λ

Analyze Hypernuclear Spectroscoy with

m (r), Vl･s(r) as two parameters ！

(l ・ s)surface > (l ・ s)interior Spindown

particle

Difference?

Spindown

particle

Difference?

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pp

nunbound

exotic nucleusbound exotic hypernucleus

6H5H glue-like

role of-hyperonn

n

n

nn n

n

insight　into　halo　nuclear　structure　through　hypernuclei

NNNN

NN

NN

NN

77MeV

290MeV

smaller M

NN

NN NN

contribution　of　　component　and　many　body　effect

larger mixing

n-rich　hypernucleus　is　a　doorway　to　n-star

S=0S=0S=-1S=-1

ordinary nucleiordinary nuclei -hypernuclei-hypernuclei

J. Schaffner-Bielich, Nucl. Phys. A804 (2008) 309

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Necessity for Hadron Hall extension

J-PARC

primary lines

secondary lines

BNL-AGS

Too small area 　 ⇔ 　 KEK-PS x2.4, BNL-AGS x4.1

Only 4 beam lines 　⇔　 KEK-PS ~7 lines, 　 BNL-AGS ~15 lines

-> Ineffective operation (“output per operation cost” is bad.)

　 Long waiting queue of approved experiments (At K1.8/K1.8BR lines, 6960 hours = more than 6 years ）　　　　 -> Discourage users in the world. Predominance will be lost.

Extremely urgent !

First priority in nuclear physics community in Japan

RIKEN is considering its funding!

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Thanks