the us-japan hep collaboration 30th anniversary symposium oct. 20- oct.21 koichiro nishikawa (kek)
DESCRIPTION
Future Plan at J-PARC Neutrino program with accelerator Physics 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 accelerator past (KEK-12GeV PS), present, future. - PowerPoint PPT PresentationTRANSCRIPT
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)