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BETA-BEAMS
The beta-beam concept
LOW ENERGY BETA-BEAMS
The baseline scenario
The physics potential
Conclusions
Cristina VOLPE (IPN Orsay and Institut fuer
Theoretische Physik Heidelberg)
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THE BETA-BEAM CONCEPT
CONVENTIONAL METHODS
Neutrino beams are produced using the decay of
pions and muons.
THE BETA-BEAM CONCEPT
P. Zucchelli, PLB 2002
A novel method to produce neutrino beams based on
beta-decay.
Lorentz boost
Q ?1/
high
ADVANTAGES OF BETA-BEAMS
Pure ( or ) beams.
Well known neutrino fluxes.
Strong collimation.
A NOVEL METHOD TO PRODUCE INTENSE, COLLIMATED,
PURE HIGH ENERGY NEUTRINO BEAMS FROM BOOSTED
RADIOACTIVE IONS.
Cristina VOLPE
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THE CERN BASELINE SCENARIO
Decay ring Brho 1500 Tm B5 T Lss2500 m
SPS
Decay Ring
SPL (2.2 GeV 2.3x1014 p/pulse)
ISOL target Ion source
ECR
PS
Cyclotrons
Fast cycling synchrotron
BETA-BEMS WOULD - USE CERN
INFRASTRUCTURES, -NEED ION PROD. AND DECAY RING.
Cristina VOLPE
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SPL
ISOL Target ECR
Linac, cyclotron
Fast cycling synchrotron
PS and SPS
Decay Ring
1.0x1013 8.0x1011 ions/s 50 MeV/u
1.0x1012 4.1x1010 ions/bunch 300 MeV/u
1.0x1013 5.0x1011 ions/batch 139 GeV/u 55 GeV/u
2.0x1014 9.0x1012 ions in 4 10 ns long bunch 139
GeV/u 55 GeV/u
Production, ionization, pre-bunching 20 KeV/u
6He2
18Ne10
3ms 2.2 GeV for NuFact and Super Beam
SPL USE
15 mA
15 ms 2.2 GeV For other users
Beta-beam
3 mA
20 ms
SPL COULD BE USED BY MANY USERS.
Cristina VOLPE
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THE BETA-BEAM PHYSICS POTENTIAL
Neutrino experiments
Measurement of the mixing angle Study of CP
violation
Geneve
?e ? ?m (?) ?m ? ?e (p) ?e ? ?m
(?-) ?m ? ?e (p-)
130 km
CP
T
Italy
UNO 1 Mton Cerenkov Detector
Astrophysics studies
Supernova neutrinos
Proton decay
A RICH PHYSICS PROGRAM !
Cristina VOLPE
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BENE (neutrino beams) NETWORK GSI
Helmuth Weick, Markus Steck, Peter Spiller,
Oliver Boine-Frankenheim, R. Hollinger, B.
Franzke CEA Olivier NAPOLY, Jacques Payet,
Jacques Bouchez IN2P3 Cristina Volpe, Alex
Mueller, Pascal Sortais, Laune Bernard, Antonio
Villari INFN Vittorio Palladino, Mauro
Mezzetto, Alberto Facco, Andrea Pisent UK Chris
Prior, Marielle Chartier CERN Mats Lindroos,
Steven Hancock, Matteo Magistris, Simone
Gilardoni, Fredrik Wenander, Roland Garoby,
Michael Benedikt, Ulli Koester GENEVA University
Alain Blondel LOUVAIN-la-NEUVE Guido
Ryckewaert, Thierry Delbar UPPSALA Dag
Reistad ASSOCIATE Andreas Jansson, Rick Baartman
Cristina VOLPE
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REFERENCES
Moriond Workshop last March Radioactive beams
for nuclear physics and neutrino
physics Organizers J. Bouchez, J. Aysto, Y.
Blumenfeld, P. Butler, R. Garoby, H. Haseroth,
M. Lindroos, M Mezzetto, A. Mueller, C. Volpe
See http//beta-beam.web.cern.ch/beta-beam/.
The original idea P. Zucchelli, Phys. Lett. B
532(2002)166. The feasibility study B. Autin,
M. Benedikt, M. Grieser, S. Hancock, A.
Jansson, M. Lindroos, S. Russenschuck, F.
Wenander, CERN/PS 2002-078, to be published in
Journal of Physics G. The physics potential M.
Mezzetto, hep-ex/0302007 to be published in
Journal of Physics G.
Cristina VOLPE
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CONCLUSIONS AND THE FUTURE
The beta-beam concept is a novel method to
produce pure, collimated and intense high energy
neutrino beams by boosting radioactive ions. The
beta-beam scenario uses CERN infrastructures and
relies on existing technology.
A rich physics program for neutrino physics and
astrophysics would be addressed by sending
beta-beams to a Megaton detector located at 130
km, in the underground Frejus laboratory.
The feasibility study will be pursued in the
future in the context of the BENE network for
the high energy part.
Synergy with other communities for the proton
driver, ion Production and first acceleration
steps (EURISOL).
Cristina VOLPE