1. Future R&D: beta-beam
Mats Lindroos
Mats Lindroos

2. Test of target prototypes at e.g. TRIUMF (ISAC facility).
Production
Test of target prototypes at e.g. TRIUMF (ISAC facility).
Prototyping of a ring with ionization cooling for production of beta-beam isotopes.
Mats Lindroos

3. Production ring with ionization cooling
Mats Lindroos

4. 6He production from 9Be(n,a)
Converter technology: (J. Nolen, NPA 701 (2002) 312c)
Converter technology preferred to direct irradiation (heat transfer and efficient cooling allows higher power compared to insulating BeO).
6He production rate is ~2x1013 ions/s (dc) for ~200 kW on target.
Mats Lindroos

5. ISAC at TRIUMF: First high power ISOL facility!
Mats Lindroos

6. Ionization and Bunching
Test of all concepts for efficient ionization and bunching.
Mats Lindroos

7. 60 GHz « ECR Duoplasmatron » for gaseous RIB
2.0 – 3.0 T pulsed coils
or SC coils
Very high density
magnetized plasma
ne ~ 1014 cm-3
Small plasma
chamber F ~ 20 mm / L ~ 5 cm
Target
Arbitrary distance
if gas
Rapid pulsed valve ?
1-3 mm
100 KV
extraction
UHF window
or « glass » chamber (?)
20 – 100 µs
20 – 200 mA
1012 per bunch
with high efficiency
60-90 GHz / KW
10 –200 µs /  = 6-3 mm
optical axial coupling
optical radial (or axial) coupling
(if gas only)
P.Sortais et al.
Mats Lindroos

8. (minimize charge exchange)
Source scheme
5 T
28 GHz +
37 GHz
(15 kW)
2.5 T
+ 20 kV
large
plasma chamber
multi electrode
system
cryogenic
trap
target
efficient pumping
(minimize charge exchange)
D. Hitz, CEA
Mats Lindroos

9. Magnets
several central coils for a good confinement nearby injection side
and worse confinement at extraction side
hexapolar radial field
injection
side
extraction
side
2 to 4 central coils
Mats Lindroos

10. Design of accumulation ring
Mats Lindroos

11. Accumulation at 400 MeV/u T1/2=1.67 s T1/2=17 s T1/2=0.67 s
Mats Lindroos

12. The annual rate
The annual rate at the EURISOL beta-beam facility is a factor of two below the annual rate assumed in most calculation
Is it possible to re-gain this missing factor of two within the present base-line?
Mats Lindroos

13. High gamma beta-beam
Gamma
Rigidity
[Tm]
Ring length
T=5 T
f=0.36
Dipole Field
rho=300 m
Length=6885m
100
938
4916
3.1
150
1404
6421
4.7
200
1867
7917
6.2
350
3277
12474
10.9
500
4678
17000
15.6
New SPS
Civil engineering
Magnet R&D
Mats Lindroos

14. Summary Project Subjects Cost Other communities Production
Production ring
Target tests
5-15 MEuro
10-30 FTE
Nuclear Astrophysics, Hadron therpay
Ionization and bunching
60 GHz ECR (2 types)
BNL EBIS?
5-10 MEuro
5-10 FTE
Nuclear physics
Machine studies
HI acceleration
Accumulation
Higher gamma beta-beam
Manpower
Heavy ion physics, Nuclear physics
Mats Lindroos

15. Conclusions For the proposal: For the beta-beam:
Decide on a strategy for EU proposals for neutrino beams
Appoint a writing group(s) and set up a schedule for the proposal(s)
Present the proposal(s) for ESGARD
For the beta-beam:
We need to enlarge the community
For a fair comparison with neutrino factories we need to study the limits of the concept starting at “study 1”.
Mats Lindroos