Summary of Nufact-03 Alain Blondel

1
NuFact 03 5th International Workshop on Neutrino
Factories Superbeams Columbia University, New
York 5-11 June 2003
Highlights and personnal impressions part II
http//www.cap.bnl.gov/nufact03/
2
BETA BEAMS

• Concept proposed by Piero Zucchelli
• Produce radioactive ions (ISOL technique)
• Accelerate them in the CERN accelerator complex
  up to G of order 100
• Store ions in a storage ring with long straight
  sections aimed at a far detector
• Advantages
• strongly focussed neutrino beam due to small Q
  value of beta decays
• (quality factor G/Q)
• very pure flavour composition ( n m
  contamination 10 -4 )
• perfectly known energy spectrum
• Baseline scenario studied at CERN (Mats Lindroos
  and collaborators)
• Recent progress presented at a special workshop
  at Moriond
• Possible synergy between beta beams and EURISOL
• Updated study of expected performances (Mauro
  Mezzetto)

3
A new idea for the ion source using a pulsed
ECR source

• Idea proposed by Pascal Sortais at Moriond
  workshop
• Based on experimental work done at Grenoble with
  Phoenix
• gt High density/high frequency plasmas allow to
  produce efficiently
• short bunches (20 ms instead of 20 ms) of ions
  with a high repetition
• rate (16 Hz) by pulsing the RF and the HV
• Advantages
• Ions are already very well bunched and
  (hopefully) totally stripped
• This simplifies considerately the design
  downstream
• Possibility to use a LINAC rather than a
  cyclotron or a FFAG
• Multiple turn injection in the storage ring
  becomes possible (40 turns)

4

Simplification of the injection system
P. Sortais, Moriond workshop
5
sin2 q13
0.0003
0.001
0.003
6
? 13 and d measurements using superbeam and
betabeam
SPL 2 years in nm 8 years in anti
nm BETABEAM 10 years of 6He AND 18Ne (Mauro
Mezzetto)
7
UPDATED CP sensitivity domain of 99 CL effect
for maximal CP violation