The AQUA-RICH The AQUA-RICH projectproject

Main new ideas

• Use RICH technique (common in HEP)

• Use multiple scattering for momentum determination

Show proof of principle ?

Basic problem: MANPOWER

How to realise 1 MtMilind Diwan UCLA Dec 5, 2003With Thanks to Kai Zuber and The late Tom Ypsilantis

Mega Detector for DUSELMega Detector for DUSEL Requirements: Very ambitious !Requirements: Very ambitious !

– 500 kTons fiducial mass for both Proton decay and 500 kTons fiducial mass for both Proton decay and neutrino astro-physics and neutrino beam physics.neutrino astro-physics and neutrino beam physics.

– ~10 % energy resolution on quasielastic events~10 % energy resolution on quasielastic events– Muon/electron discrimination at <1%Muon/electron discrimination at <1%– 1, 2, 3 track event separation (need separation at 5 1, 2, 3 track event separation (need separation at 5

deg.)deg.)– Showering NC event rejection at factor of ~15Showering NC event rejection at factor of ~15– Low threshold (~10-15 MeV) for supernova searchLow threshold (~10-15 MeV) for supernova search– Part of the detector could have lower threshold for Part of the detector could have lower threshold for

solar neutrino detection.solar neutrino detection.– Time resolution of ~few ns for pattern recognition and Time resolution of ~few ns for pattern recognition and

background reduction. background reduction. – Perhaps am imaging detector is better than SuperK Perhaps am imaging detector is better than SuperK

type water Cherenkov detector ?type water Cherenkov detector ?

CollaborationCollaboration

Original idea by Thomas Ypsilantis

SimulationSimulation

ReconstructionReconstructionScattering angle vs. momentum

8,12,16 GeVmuonsA. Großheim, K. Zuber in prep.

AQUA - RICHAQUA - RICH

3 ton prototype at CERN

MirrorPMTsHPDs

PMT developmentPMT development

Lense Design: have obtained +- 72 deg. View.Converts angle to position.Use pixel photo-multiplier or PMT array. (P. Takacs)

ConclusionsConclusions Can also think of detector as Cherenkov Can also think of detector as Cherenkov

angle measurement.angle measurement. What angular resolution needed ?What angular resolution needed ? How to get information from beginning of How to get information from beginning of

showering events ?showering events ? Could we use lenses instead of mirrors?Could we use lenses instead of mirrors? Simulations need to extend to showers Simulations need to extend to showers

and low energy events. and low energy events. A hybrid detector of proximity and mirror A hybrid detector of proximity and mirror

(or lense) focussed imaging?(or lense) focussed imaging?