Beta-beam study group

Letter of Intentbeta-beam design study

Mats LindroosOn behalf of the

Beta-beam working group

Beta-beam study group

CERN: -beam baseline scenario

PS

Decay

Ring

Decay ring

Brho = 1500 Tm

B = 5 T

Lss = 2500 m

SPSISOL target & Ion source

SPL

Cyclotrons, linac or FFAG

ECR

Rapid cycling synchrotron

Nuclear Physics

MeV 86.1 Average

MeV 937.1 Average

189

1810

63

62

cms

cms

E

eFeNe

E

eLiHe

P. Zucchelli, Phys. Lett. B, 532 (2002) 166-172

Beta-beam study group

Beta-beam• Isotope production using the

ISOL method with a proton driver of SPL type

• Bunching in high frequency ECR source

• Production and acceleration to 100 MeV/u already studied in EURISOL study– TARGISOL (U. Koester)

• Accumulation in low energy storage ring

• Acceleration to 300 MeV/u using fast cycling synchrotron, FFAG or cyclotron

• Acceleration to higher energies using existing CERN accelerators

• Injection and accumulation using newly developed scheme

M. Benedikt and S. Hancock, CERN

Beta-beam study group

Physics reach• Combined with a Super

Beam the beta-beam can successfully address CP violation for values of the mixing angle 13 as small as 1 degree

• With improvements on the isotope production it is possible that the beta-beam could become comparable to a neutrino factory

• In conjunction with the Super-beam, the beta-beam would also allow for tests on T and CPT in the neutrino sector

M. Mezzetto, Proceedings of Nufact 02, London, 2002, hep-ex/0302007 and presentation at NUFACT03, New York, 2003

Beta-beam study group

CERN to FREJUSGeneve

Italy

130km

40kt400kt

CERN

SPL @ CERN2.2GeV, 50Hz, 2.3x1014p/pulse 4MWNow under R&D phase

Beta-beam study group

UNO like detector in Frejus

• UNO: 400 KTon water Cerenkov detector

• Originally designed for proton decay studies and supernovae explosion observations

• A multipurpose observatory which will address several fundamental physics issues besides neutrino oscillations

Chang Kee Jung, hep-ex/0005046

Beta-beam study group

Moriond meeting• Annual electro week meeting in Les Arcs• Workshop on Radioactive beams for

Nuclear and Neutrino Physics– Organizer: Jacques Bouchez, CEA, Saclay

• Many new ideas, among them:– Multiple targets for Ne production– ECR bunching (P. Sortais)– Ne and He in the decay ring simultaneously– Low energy beta facility

• GSI, GANIL and CERN (in close detector)• C. Volpe, hep-ph/0303222, submitted to Phys. Rev.

Let

Beta-beam study group

Synergies

• Close synergy with the EURISOL project– Isotope production– Acceleration to 100 MeV/u

• Possible synergies with GSI up-grade plans for accelerator issues and decay ring

• Possible synergies with LHC heavy ion programme

Beta-beam study group

Design study• A full Technical Design Report could be

achieved within five years• Technical Preparatory work can immediately

start on:– Target design– ECR source– High energy accumulation scheme

• Study and design work:– Accelerator issues– Decay ring– Superconducting dipole design– Simulation and design work to handle decay losses

Beta-beam study group

Who are we?Signatures sorted in alphabetical order on institute and authorJacques Bouchez, Luigi Mosca, Olivier Napoly, Jacques Payet,

Saclay, CEA, FranceMichael Benedikt, Peter Butler, Roland Garoby, Juan-Jose Gomez Cadenas, Steven Hancock,

Pilar Hernandez, Ulli Koester, Mats Lindroos, Matteo Magistris, Thomas Nilsson, Fredrik Wenander

CERN, SwitzerlandAlain Blondel, Simone GilardoniGeneva University, Switzerland

Oliver Boine-Frankenheim, Bernhard Franzke, Ralph Hollinger , Markus Steck , Peter Spiller, Helmuth Weick

GSI, GermanyBernard Laune, Orsay , Alex Mueller, Orsay, Pascal Sortais, Grenoble , Antonio Villari,

GANIL, Cristina Volpe, OrsayIN2P3, France

Alberto Facco, Legnaro, Mauro Mezzetto, Padua, Vittorio Palladino, Napoli, Andrea Pisent, Legnaro

INFN, ItalyThierry Delbar, Guido Ryckewaert

Louvain-la-neuve, BelgiumMarielle Chartier

Liverpool university, UKChris PriorRAL, UK

Dag ReistadUppsala university, The Svedberg laboratory, Sweden

Associates: Rick Baartman, TRIUMF, Vancouver, Canada, Andreas Jansson, Fermi lab, USA

Beta-beam study group

Conclusions• All alternatives for the production of intense

neutrino beams should be fully studied– Physics reach– Technical Design Report with reliable cost estimates

• The beta-beam facility, the super-beam and an UNO like detector is a very powerful tool for research in neutrino physics

• The organization and governance of the design study should come from ESGARD and EMCOG– Synergies with nuclear physics studies

• ESGARD recommends that the beta-beam forms part of either:– A unique neutrino beam design study (hosted by RAL)– The EURISOL design study (hosted by GANIL)