status of the t2k experiment

J-PARC PAC ‘07

Imperial College/RALDave Wark

Status of the T2K Experiment

Dave WarkImperial/RAL

J-PARC PACKEK

July 6, 2007

J-PARC PAC ‘07


Evidence for oscillations from…

71±571±5

Early Solar Neutrino Exps.

SuperK

SNO Soudan II

MACRO

Has shown that neutrinos have mass and oscillate.

1R- Energy spectrum

K2K

KamLAND

MINOS

J-PARC PAC ‘07


ijijijij sandcwhere sin,cos

100

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0sc

c0iδes

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UUU

UUU

UUU

U 1212

1212

1313

1313

2323

2323

τ3τ2τ1

μ3μ2μ1

e3e2e1

li

ilil U If neutrinos have mass:

)E

LΔm.(θ)νP(ν eμ

222 271sin2sin

For three neutrinos:

Three Angles

The Maki-Nakagawa-Sakata-Pontecorvo Matrix

J-PARC PAC ‘07



100

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c0iδes

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UUU

UUU

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1212

1313

1313

2323

2323

τ3τ2τ1

μ3μ2μ1

e3e2e1

li



)E

LΔm.(θ)νP(ν eμ

222 271sin2sin

Two mass differences


J-PARC PAC ‘07



100

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cs0

sc0

001

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UUU

UUU

U 1212

1212

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1313

2323

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τ3τ2τ1

μ3μ2μ1

e3e2e1

li



)E

LΔm.(θ)νP(ν eμ

222 271sin2sin

CP violating phase


J-PARC PAC ‘07


A happy announcement…

J-PARC PAC ‘07


IAC07 T2K


Current knowledge of oscillation parameters.

12, m122 23, m23

2

Solar + KamLAND

SK +K2K+ MINOSMiniBooNE has failed to confirm the single piece of counterevidence

J-PARC PAC ‘07


IAC07 T2K


J.W.F. Valle, hep-ph/0410103

What about 13?

J-PARC PAC ‘07



100

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0sc

c0iδes

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1212

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e3e2e1

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)E

LΔm.(θ)νP(ν eμ

222 271sin2sin

ELmmm

Pe

4/and/ where

sin2sincos

2sincos2sin2sincoscos2sin

sin2sin2sincossin2sin

sin2sin2sin

231

231

221

212

223

22

23121313

323121313

223

213

2

~0.03 /4And sin2213 < ~0.14

Three neutrino mixing.

J-PARC PAC ‘07


IAC07 T2K


disappearance

m232

sin22

What will T2K Add?

sin22

e appearance

First phase of a longer programme whichcould have sensitivity to CP violation!

J-PARC PAC ‘07


J-PARC PAC ‘07


IAC07 T2K


Super Kamiokande Rebuild

J-PARC PAC ‘07


J-PARC PAC ‘07


Project Integration and Schedule

• 280m detector hall will not be fully available until February 2009, producing a severe challenge for the installation of the 280m detectors.

• As recommended by the PAC, we have formed an Integration Group of the detector engineers, organized by Alan Grant and Cormac Neeson, to do detailed planning of the detector installation.

• Meeting planned for July 10/11 at Imperial, 19 engineers will be in attendance.

J-PARC PAC ‘07


Project Integration and Schedule

J-PARC PAC ‘07


Project Integration and Schedule• Obviously such an integration programme is

complex and interconnected (and something could slip), however…

• Previously all installation was scheduled for Feb-March, now just the INGRID

• For beam commissioning only the INGRID and muon monitors are really needed, and these have few linkages to the other detectors.

• The neutrino spectrum can me measured with just the magnet, FGDs, and TPCs.

• We should therefore be able to make efficient use of the beam from day one.

J-PARC PAC ‘07


IAC07 T2K


Other Progress and Issues• The T2K Collaboration has adopted an

International Collaboration Agreement.• This replaces the provisional governing

structure of the collaboration with a governing arrangement fairly typical of international HEP projects:– Spokesman and International Co-Spokesman– Executive Committee and Institutional Board– Publication policy– Speakers bureau…

• We are forming new Working Groups for T2K-SK analysis and Global Analysis

J-PARC PAC ‘07


• Canada– Contributions:

• All the FGD except photosensors

• TPC mechanical and field cage, integration, gas system

• Slow Controls and Monitoring

• Cont. to Beamline: OTR Monitor, Remote handling for hot cell, beam position/profile monitors and vessel

– Funding situation: secured with yearly review

• France– Contributions:

• INGRID detector (LLR)

• TPC Micromegas and FE electronics (Dapnia)

• TPC BE electronics (LPNHE)

• Beamline quench detection system

• Power supply for the UA1 magnet

– Funding situation: secured.

Contributions and Funding by Country

J-PARC PAC ‘07


• Germany– Contributions:

• UA1 Magnet moving system

• TPC gas monitoring– Funding situation:

request submitted.

• Italy– Contributions:

• UA1 Magnet preparation

• TPC elements?– Very uncertain…

• Japan– Contributions:

• J-PARC• Most of SK, and the SK

rebuild and upgrades • Most of the T2K

beamline, target, and beam dump including beamline monitors and muon monitor

• Infrastructure for the 280m facility

• INGRID detector • FGD photosensors • SMRD FEE • Cont. to NA61

– Funding situation: secured, with additional funding from MEXT in form of competitive grants.


J-PARC PAC ‘07


Contributions and Funding by Country• Poland

– Contributions:• Cont. to SMRD

• Cont. to NA61

– Funding situation: request submitted

• Russia– Contributions:

• Cont. to SMRD

– Funding situation: secured

• South Korea– Contributions:

• Beamline proton monitor electronics


• Spain– Contributions:

• TPC testing, calibration, and gas monitoring

• Cont. to UA1 magnet


• Switzerland– Contributions:

• Cont. to TPC mechanics, testing, and assembly

• Major contributions to NA61

• Major Cont. to UA1 magnet

– Funding situation: secured subject to annual review

J-PARC PAC ‘07


• United Kingdom– Contributions:

• BEE for ECAL/P0D /SMRD/INGRID• Cont. to beamline - beam

window, baffle, and engineering for target and dump design, target remote handling

• Basket/basket stand• ECAL (all)• FEE design for

P0D/SMRD/INGRID• DAQ for 280m• Cont. to UA1 magnet

– Funding situation: ~60% secured, funding for the Barrel and P0D ECALs deferred for decision this year.

• United States– Contributions:

• Cont. to SK, including upgrades, rebuild, and new SK electronics

• P0D (all)• Beamline - SC corrector

magnets, 2nd horn, monitor electronics and GPS

• Cont. to SMRD

– Funding situation: secured, with forward cash flow from institutions(!)


J-PARC PAC ‘07


Overall funding situation…• Mostly good. The only major uncertainty for

committed items is the UK funding for the ECAL, which we should find out later this year.

• However:– There is no overall cash reserve or contingency for the

project.

– A number of items have been identified which fall in the cracks between commitments, the most notable of which is the magnet installation (precise cost estimates are not yet available for some of these items).

J-PARC PAC ‘07


Magnet Installation

J-PARC PAC ‘07


J-PARC PAC ‘07


Overall funding situation…• Mostly good. The only major uncertainty for

committed items is the UK funding for the ECAL, which we should find out later this year.

• However:– There is no overall cash reserve or contingency for the

project.– A number of items have been identified which fall in

the cracks between commitments, the most notable of which is the magnet installation (precise cost estimates are not yet available for some of these items).

– We tried to cover this by extending the operating Common Fund forward two years into the construction period.

– This has not been immediately accepted by all funding agencies, and we are negotiating.

– The total amount is small compared to the project cost, but the last bit is always hardest to find…

J-PARC PAC ‘07


Overall funding situation…• The situation with the final funding for

completion should properly be the remit for an International Finance Committee made up of representatives from the funding bodies.

• We would welcome help from KEK in rapidly forming such a committee to help us finalize funding arrangements for installation and integration.

status of the t2k experiment

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