Future Plan at J-PARC

Neutrino program with acceleratorPhysics program at slow extracted beam

and Accelerator status

The US-Japan HEP Collaboration 30th Anniversary Symposium

Oct. 20- Oct.21

Koichiro Nishikawa (KEK)

Neutrino program with acceleratorpast (KEK-12GeV PS), present, future

A past US-Japan collaboration- K2K experiment 1999-2005 -

JAPAN: High Energy Accelerator Research Organization (KEK) / Institute for Cosmic Ray Research (ICRR), Univ. of Tokyo / Kobe University / Kyoto University / Niigata University / Okayama Uni

versity / Tokyo University of Science / Tohoku UniversityKOREA: Chonnam National University / Dongshin University / Korea University / Seoul National

UniversityU.S.A.: Boston University / University of California, Irvine / University of Hawaii, Manoa / Massachusetts Institute of Technology / State University of New York at Stony Brook / University of Washing

ton at SeattlePOLAND: Warsaw University / Solton Institute

Since 2002JAPAN: Hiroshima University / Osaka University U.S.A.: Duke University

CANADA: TRIUMF / University of British ColumbiaITALY: Rome FRANCE: Saclay SPAIN: Barcelona / Valencia SWITZERLAND: Geneva

RUSSIA: INR-Moscow

Detection of from accelerator 250km away

Existence ofoscillation

5

Materials and Life ScienceExperimental Facility

Hadron Beam Facility

Present and near future of J-PARC

J-PARC = Japan Proton Accelerator Research ComplexJoint Project between KEK and JAEA

Linac

180→400 MeV

Neutrino Facility

Slow Extracted Beam Facility

Rapid Cycling Synchrotron

(3GeV, 25 Hz, 1MW)

Main Ring

(30 GeV, 0.3 Hz, →~1Hz

0.75 MW→ 1.66 MW)

J-PARC Facility(KEK/JAEA）

Bird’s eye photo in January of 2008

South to North

Neutrino Beams 　(to Kamioka)

JFY2009 Beams

Main ring

JFY2008 Beams

3 GeV Synchrotron

CY2007 Beams

Linac

Design Intensity750kW

ConstructionJFY2001~2008

7

T2K (Tokai to Kamioka) experiment

• High intensity beam from 　　　　　 J-PARC MR to Super-Kamiokande @ 295km

• Discovery of e appearance → Determine 13– Last unknown mixing angle– Open possibility to explore CPV in lepton sector

• Precise meas. of disappearance → 23, m232

– Really maximum mixing? Any symmetry?OA3°

OA0°

OA2°

OA2.5°

Osc. Prob. ＠m2=3x10-3eV2

f

lux

The T2K Collaboration

Canada

TRIUMF

U. Alberta

U. B. Columbia

U. Regina

U. Toronto

U. Victoria

York U.

France

CEA Saclay

IPN Lyon

LLR E. Poly.

LPNHE Paris

Germany

U. Aachen

~500 members, 61 Institutes, 12 countries

Italy

INFN, U. Roma

INFN, U. Napoli

INFN, U. Padova

INFN, U. Bari

Japan

ICRR Kamioka

ICRR RCCN

KEK

Kobe U.

Kyoto U.

Miyagi U. Edu.

Osaka City U.

U. Tokyo

Poland

A. Soltan, Warsaw

H.Niewodniczanski, Cracow

T. U. Warsaw

U. Silesia, Katowice

U. Warsaw

U. Wroclaw

Russia

INR

S. Korea

N. U. Chonnam

U. Dongshin

U. Sejong

N. U. Seoul

U. Sungkyunkwan

STFC/RAL

STFC/Daresbury

USA

Boston U.

B.N.L.

Colorado S. U.

Duke U.

Louisiana S. U.

Stony Brook U.

U. C. Irvine

U. Colorado

U. Pittsburgh

U. Rochester

U. Washington

Spain

IFIC, Valencia

IFAE (Barcelona)

Switzerland

U. Bern

U. Geneva

ETH Zurich

United Kingdom

Imperial C. London

Queen Mary U. L.

Lancaster U.

Liverpool U.

Oxford U.

Sheffield U.

Warwick U.

9

Neutrino facility in J-PARC Construction (JFY2004~2008) COMPLETED

Target

Primary beamline (superconducting)

Electromagnetic hornNeutrino monitor bld.

Near detectors

Decay volume completed

Beam dump Target station (He vessel)

9

P0Ddetector

2nd horn

Correctionmagnets

Near Detector Neutrino Measurements

10ICHEP2010 -- T.Nakaya (Kyoto) --

dE/dx by TPC (positive)Neutrino interaction

proton

MIP ()

electron

Neutrino event rate ( INGRID)

Neutrino event timing( INGRID)Jan. 23rd June 26th

SK first event Feb.24, 2010

11

SK observation

Event time distribution

• Event time distribution clearly show beam structure

T2K Physics Run begins in 2010.

13

• 3.3×1019 protons accumulated (~16[kWx107s])• @ ~50kW level 42 days for physics data• Trial up to 100kW successful.

~50kW

B

eam

Pow

er

~100kW

Issues and critical path in neutrino program• Beam power

– RCS kicker repaired (operation time)– New FX kicker installed this summer (6 ⇒8 bunches,

>1.2•1013 /bunch)– Improvement of MR magnet power supply and RF

• Repetition rate from 3.52 sec. ⇒ 3.22 sec (⇒ 2.64 sec )• Short time goal

– 150kW 6 months run with 120 days for physics during mid. Nov. 2010 to May 2011

– RCS 500kW (MR 300kW) trial (2•1013/bunch and 8 bunches)• Medium period goal

– Continuous run with >300kW starting 2011 fall • MW*107 sec integral power by 2014• Further rapid cycling

Quest for the Origin of Matter Dominated Universe

One of the Main Subject of the One of the Main Subject of the KEK RoadmapKEK Roadmap

Discovery of Lepton CP Violation

Proton Decay

Discovery of the e Appearance

Neutrino Intensity Improvement

Huge Detector R&D

T2K(2009~)

　 Water Cherenkov

v Liquid Ar TPC

Establish Huge Detector

Technology

Construction of Huge Detector

Ready for charged particle test-beam @J-PARC

View from cathode side(see 1cm strip anode at far side)

Observed the first cosmic ray track @KEK (Sep-2)

R&D effort of LAr TPC: Low energy charged particle beam

@ J-PARC

Physics program withslow extracted beam

KL

K1.8

K1.8BR

T1 target

30GeV proton beam

Slow extracted beam facility

dd

uuuu

dd

ss

Pentaquark +He6

Implantation ofKaon and the

nuclear shrinkage

K meson

Kaonic nucleusKaonic atom

Ｘ ray

Ｋ−

K1.1BROct. 2010T-viola-tion

K→ L

Free quarks Boundquarks

Why are bound quarks haevier ？

Quark

Mass without Mass Puzzle

N

Z, Hypernuclei

, Hypernuclei

Str

an

ge

ne

ss

0

Hypernuclei

-1

-2

Slow Extraction

Radioactivity by beam loss

⇒∼10%

Issues and critical path in slow extracted beam program

• Spill structure• Main PS tuning to reduce 600Hz ripple• Feedback with RF noise• Ripple cancellation system installed

• Reducing radioactivity of beam line elements• Dynamic bump scheme has been installed this summer

• Starting up now

KL

K1.8

K1.8BR

T1 target

30GeV proton beam

SKSProgram at slow extracted beam facility

starting now

dd

uuuu

dd

ss

Pentaquark +

He6

K→ L

Test Beam

LAr testExtiction measurement For – e conversion

• 2009: 　 beamline construction　　⇒　 beam survey (KL flux)

• 2010: 　 CsI calorimeter construction　　⇒　 engineering run beam properties with calorimeter

• 2011: 　 detector installation　　⇒　 full engineering run,

start physics run　　　　 10% intensity(30kW) 　 one month

milestones of

goal of KOTO exp.(== Step1)

goal of KOTO exp.(== Step1)

✓

Other Particle-Physics experiments at J-PARC

• New proposal on neutron EDM at J-PARC– With ultra high precision magnetic field measurement

• New proposal on muon g-2/EDM– See Dr. Saito’s talk

Summary• All J-PARC started operation• Beam power

– FX(Neutrino): 50kW stable (100kW trial) realized, aim for 150kW and continuous physics run starting in Nov.

– SX: 2.6kW realized, tuning for 5kW continuous operation with new additional hardware

• Particle physics program:– T2K: Started Data taking!– KOTO: Commissioning of beam done, further beam study wit

h calorimeter installed – Penta-quark search data taking starting up– Intensive work on preparation and R&D on

• COMET (e conv.), g-2/EDM, nEDM, LiqAr TPC• Beam power will be increased in stages toward realizing

– Design power of 750kW– Then 1.7MW (KEK roadmap)