High Energy Physics in Japan from KEK point of view

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High Energy Physics in Japanfrom KEK point of
view

1. On-going projects at KEK
2. KEK five years road map
3. J-PARC
4. KEKB upgrade
5. ILC Accelerator R/D
6. Conclusion

• June 4, 2009_at_Fermilab Users Meeting
• Koichiro Nishikawa
• Institute for Particle and Nuclear Studies, KEK

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KEK Current Core Activities
Photon Factory
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Other Projects
SOI Pixel
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JAHEP Roadmap Report on Prospects for Particle
Physics (October, 2006)

• Communitys master plan
• Highest priority is given to ILC.
• Before the ILC experiment commences, flavor
  physics at KEKB and J-PARC, and energy frontier
  physics at LHC are promoted.
• The above two goals should be pursued in a single
  master plan.

• Action plans before the ILC approval
• ILC RD
• Completion/commissioning of J-PARC
• Considering the world competition, it is urgent
  to improve neutrino intensity
• Continuation of KEKB/Belle with upgrade

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Summary of KEK Roadmap
2007
2008
2009
2010
2011
2012


construction
1st results
operation
LHC
LHC upgrade
TDP1
ILC RD
TDP2
lots and lots of RDs
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Status of accelerator andparticle physics
experiments at J-PARC
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Commissioning Status
J-PARC Facility (KEK/JAEA)
Linac
South to North
JFY2007 Beams
JFY2008 Beams
JFY2009 Beams
Birds eye photo in January of 2008
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Primary proton beam line combined function SC
magnets
Slow beam extraction to Hadron Hall
fluorescence plate just in front of target
Graphite target
Target station

• Recent important milestones
• December 23, 2008
• 30 GeV beam acceleration and fast extraction
• to the beam abort dump
• MLF user run (20kW)
• January 27, 2009
• 30 GeV beam extraction to the Hadron Exp. Hall
  (Slow ext.)
• February 19, 2009
• Government inspection for radiation safety
  (Hadron hall)
• April 23, 2009
• 30 GeV beam extraction to the neutrino target
  station (Fast ext.)
• May 28,2009
• Government inspection for radiation safety
  (Neutrino facility)

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• Beam commissioning has been accomplished on
  schedule,
• BUT with low intensity.
• Real challenge toward the power frontier machine
  just started.
• Many issues (unreliable components, design etc.)
  to be solved
• Beam must be provided to the users
• Power upgrade should be also accomplished
  steadily.

• Three serious issues
• RFQ discharge problem identified problems in
• vacuum, material, and fabrication. Are there
  more problems?
• RF core long term stability problem Thermal
  stress analysis/design
• Stability of MR power supply and beam loss
• Clearly need major improvements for MW operation
• No problem for fast extraction with a level of
  100kW operation
• Need more stability for slow extraction

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Tadashi Koseki for ATAC09
Slow extraction tuning and beam loss
22.3022.35/0.5 sec
Its a Ripple extraction using SX system We
need ?further improvement of magnet power
supply ?installation of feedback system
100 msec
Steps
Two shots
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Milestone for J-PARC accelerator operation

• Neutrino
• Early achievement of 100kW run (for 107 sec, in
  2010)
• Work on power upgrade scenario from 100 to
  750kW.(2011 )
• The above second step should be the base of the
  MW-class power
• frontier machine.

• Hadron
• Early realization of spill control by
• improving magnet power supplies, and
• applying feedback system.
• Early achievement of 10kW-class power by
• understanding and suppressing and/or localizing
  the beam loss.
• In order to realize 100kW-class slow beam
  extraction, we have to develop
• excellent extraction efficiency,
• more beam loss control, and
• radiation maintenance technology.

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Tokai-to-Kamioka (T2K) long baseline neutrino
oscillation experiment

• Goal
• Discover ne app.
• nm disapp. precision meas.
• Intense narrow spectrum nm beam from J-PARC MR
• Off-axis w/ 22.5deg
• Tuned at osci. max.
• SK largest, high PID performance

1600nmCC/yr/22.5kt (2.5deg)
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Neutrino beamline

• 5 year construction 20042009
• Construction completed on schedule!

Electromagnetic horn
Graphite target
Neutrino monitor build.
Primary proton beam line completed
UA1 magnet donated from CERN installed in
Apr-Jun, 2008 on schedule
Beam dump completed
Target station completed
Decay volume completed
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T2K beamline started operation!
After 10 shots for tuning, proton beam hit
around target center
MR intensity
Muon monitor signal
Ionization chamber
Silicon
Proton beam profile monitor along nu beamline
Scintillator
Muon monitor profile
Horn Off
OTR detector just in front of target
(fluorescence plate)
Horn 250kA
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Neutrino Facility Commissioning Achievements

• Stability of the extraction beam orbit from Main
  Ring is confirmed
  Tuned
  within 0.3mm(position), 0.04mrad(direction)
  w.r.t. design orbit
• Functionality of the superconducting combined
  function magnet is confirmed.
• Beam is lead to the target center without
  significant beam loss
  
  Tuned within 3mm level accuracy w.r.t. design
  orbit
• Functionality of the beam monitors (beam
  position, beam profile, beam intensity, beam
  loss) are confirmed
• Response function of various magnets are measured
• Muon signal is observed which confirm neutrino
  production
• The effect of pion focusing with horn magnet is
  confirmed (consistent with present horn
  configuration)
• The information transfer from Tokai to Kamioka
  on the absolute beam time information is
  confirmed
• J-PARC neutrino facility is approved by the
  government on radiation safety
• Record so far
• Power 1.13 kW operation for 30
  seconds (6sec/cycle, 7.11011 pp/bunch)
• Duration 0.14 kW operation for 40
  minutes (6sec/cycle, 1 bunch, 1.71011ppb)

• Combined function super-conducting magnet
• Tuned within 3mm level
• Stability within 0.3mm(position),
  0.04mrad(direction)
• Muon signal observed
• Horn is working as expected
• Near detectors are being installed

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the Origin of Matter Dominated Universe ?
ne Appearance
T2K (2009
Discovery of Lepton CP Violation Proton Decay
Neutrino beam Intensity Improvement
Construction of Huge Detector
Tech. choice
Huge Detector RD
Liquid Ar TPC
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Rare Kaon Decay
- NA62 at CERN-SPS for
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Detector and Beamline RDfor the KL?p0nn
ExperimentBeam line is being constructedBeam
survey in 2009
A Japan/US program

• J-PARC KOTO experiment (K0 at Tokai)
• To study physics beyond SM by measuring branching
  ratio of KL?p0nn
• Modify KEK-E391a detector
• Upgraded CsI calorimeter
• Readout waveform digitization
• New photon veto in the beam

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COMET (m e conversion) activities

• Beam Extinction Study
• Abort line measurement
• Secondary beam line measurement
• Extinction monitoring device development
• Gating PMT for a Gas Cerenkov detector, 1MHz
  switching with 106 on/off ratio

• Super-conducting solenoid
• Pion capture solenoid
• Design of high Intensity muon beam line
• AC-dipole development

• B5T
• Radiation transparent
• Technology
• Detector Solenoid Tech.
• NbTiAl conductor
• Indirect pipe cooling
• Conductor development in 2009
• Test coil construction and test in 2-3 years

• Single bunch, single shot operation of MR
• Count the number of protons in the EMPTY bucket
  before the filled one

• Measure secondary particle time structure
  relative to a reference signal from the MR
• MR operation with empty buckets
• Bunched slow extraction

• 1st version corona-tested
• 2nd version built
• Single brick test soon

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Activities at J-PARC
Other particle physics experiments in preparation
_at_J-PARC
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KEKB Upgrade
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KEKB Upgrade
1.96 x 1034
goal 1 (ab)-1
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Oide _at_ HEPAP
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(1.96)
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Budgetary Process toward Super-KEKB
JFY2009
JFY2010
JFY2011
Original Scenario
Government Review Council
Full Budget Proposal
Construction
Supreme Scenario
Full Budget by Supplement
350 M
??? 30M
Better Scenario
Segmented Supplement Budget
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ILC RD
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ILC RD
First priority project in JAHEP

• RD Items
• Precise beam handling in ATF
• Superconducting RF in STF

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Accelerator Test Facility (KEK)
Diagnostic line for the extracted low emittance
beam
ATF2 Realization of the nanobeam (beam
commissioning October 2008)
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ATF2 Construction Schedule
ATF2 beam line
January,2009 Started operation. 35nm beam
ATF2 beam line
(IHEP, KEK, SLAC)
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Superconducting Accelerator Test Facility (KEK)
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STF Development Plan
Phase 1 (2005 -2008) for quick startup of
ILC SCRF, infra-structure development subdivided
to Phase 0.5 1 cavity in each short
cryostat (cool downOct.2007Feb.2008) Phase
1.0 4 cavities in each short cryostat (2008)
Phase 1.5 replacement of cavities by improved
gradient one (2008-2009) Phase 2 (2008 - 2010)
develop ILC Main Linac RF unit start
design Apr. 2008, fabrication in 2009 and 2010,
commissioning in 2011 Phase 3 (2009 - 2013)
Industrialization of ILC Main Linac
component develop industrialization technology
in 2009 and 2010, fabrication of one more RF
unit by the developed mass-production
technology GDE S0 task (2006 - 2009) in parallel
to phase 1, 2 develop ILC performance
cavity (35MV/m, 90 yield)

• Some of the recent progresses
• Inspection/repair method for inner surface of RF
  cavity
• Operation of 31.5 MV/m cavity
• Completion of cavity testing facility
• Studies on Cryostat (deformation, magnetic field
  shielding effects)
• .

Much Closer Interplay between KEK and Industries
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