radioactive beams at spl
DESCRIPTION
RADIOACTIVE BEAMS AT SPL. OPPORTUNITY FOR NEW PHYSICS !. Juha Aysto. , CERN. Physics opportunities. Nuclear physics. Astrophysics. Fundamental symmetries. Material science. Medical applications. Technology of. RIBs. Second generation RNB facility at CERN. - PowerPoint PPT PresentationTRANSCRIPT
RADIOACTIVE BEAMS AT SPLOPPORTUNITY FOR NEW PHYSICS !
Juha Aysto , CERN
Physics opportunitiesNuclear physics
Astrophysics
Fundamental symmetries
Material science
Medical applications
Technology of RIBs
Mg334847051243221 4847591243 705
1221
Na8.0 (3) ms (3/2 )33
Q = 20.3(15) MeV
( 3/2 )+(+)
P(2n )= 13 (3) %
Sn = 2071Mg + n32
Mg + 2nS2n = 7722 171221 5088514
3619732152 2551
8852321285830372551
221502nn
159546 ( 5/2 )+( 3/2 )-( 7/2 )-
+
P(1n )= 47(6) %
g.s. = 20 (11) %
31
64 66 68 70 72 74 76 78 8010-510-410-310-210-1100101102103104105106107108109
1010
Ni
Copper
ISOLDE GSI-ISOL LISOL IGISOL GSI-FRSB
eam
Inte
nsity
[io
ns p
er
s]
Mass
http://www.cern.ch/ISOLDE
ISOLDE/CERN
ISOLDE Physics Program 2000
Weak Interaction and Nuclear Physics
46%
Solid state physics23%
Particle and Astrophysics
11%
Biology/Medicine3%
Atomic Physics17%
39 Experiments270 Users77 Institutes22 Countries
R E X - I S O L D E : R a d i o a c t i v e b e a m E X p e r i m e n t a t I S O L D E
d e m o n s t r a t i o n o f a n o v e l c o s t - e f f e c t i v e a n d e f f i c i e n t p o s t - a c c e l e r a t i o n s c h e m e R I B w i t h 0 . 8 - 2 . 2 M e V A f o r n u c l e a r p h y s i c s a n d a s t r o p h y s i c s : C o u l o m b e x c i t a t i o n a n d t r a n s f e r
r e a c t i o n e x p e r i m e n t s ( N = 2 0 , N = 2 8 ) , h a l o s t r u c t u r e , u n b o u n d n u c l e i , … l o w e r e n e r g y ( < 6 0 k V Q ) s i n g l y a n d m u l t i p l y c h a r g e d p u l s e d i o n b e a m s f o r a t o m i c p h y s i c s ,
w e a k i n t e r a c t i o n s t u d i e s , s o l i d s t a t e p h y s i c s , … .
a c c u m u l a t i o n , c o o l i n g & b u n c h i n g c h a r g e s t a t e b r e e d i n g p o s t - a c c e l e r a t i o n
H V p l a t f o r m s
I S O L D E6 0 k e V
m / q = 4 - 5
R F Q I H7 - g a pr e s o n a t o r s
2 M e V / u
t o t a r g e t &d e t e c t o r a r r a y
E B I S
t o o t h e r e x p e r i m e n t s
P E N N I N GT R A P
P r i n c i p l e :
Second generation RNB facility at CERN
J. Aysto, Mats Lindroos, H.Ravn, Piet van Duppen and the ISOLDE
team
CERN-PS-2000-075 (OP)CERN-EP-2000-149
Protons for 2nd generation Isolde can be extracted from linac at various energies
Second Generation RNB Facility
• A second generation Radioactive Nuclear Beam (RNB) facility at CERN using the SPL as the proton driver– Post acceleration to 10-100 MeV/u (linac / cyclotron)
– Intensity increase x 100 - 1000
– Large-acceptance spectrometer
– Large multi-segmented detectors
– Re-cycler / storage ring
– Antiproton-RNB physics to be explored
– Muon-RNB physics to be explored
SPL - RNB facility at CERN
Hall 1 Hall 2
Hall 3
AD
ISOLDE storage ring
Muons in physics of exotic nuclei
Radioactive muonic atoms (with slow muons)--> high-precision data on nuclear charge radii &
moments novel structure features far from stability
parity nonconservation in Fr, Ra atoms
--> high probability for nuclear capture (semileptonic)production of neutron-rich nuclei ?collective excitation modes in neutron-rich nucleirenormalization of gA in nuclear medium
--> atomic cross sections !!!
Nuclear astrophysics--> supernova models, neutrinos and r-process
Deep inelastic scattering and capture (fast muons) ?--> quark and hadron dynamics
Technical feasibility of capture
• “japanese” recipe: solid H film + transfer
• combined cyclotron and ion traps
• merging beams
• other ??
LaserRFcharged particlesatoms
lightreactions and decay products
Combined cyclotron and ion traps
Cyclotron trap at PSI105 -/s @ 20…50 keVscale by 106 --> N = 1011 /s
v = 1.5 - 30 cm/
Ion traps at ISOLDE Nion = 106 /cm3
Natoms= N Nion capt v= 6…120 /s
Intersecting storage ring
• Energy range– ions: 5-150 MeV/u
– muons:
– antiprotons:
• Electron cooling on both rings
• Multi turn injection
• Magnet rigidity difference: B1/B2<10
Mats Lindroos et al.
Luminosity muons zeroth order - no cooling
• Luminosity:– 107 ions, 1012 muons per second as in PRISM
– Fraction of muons within useful range: 10-4
• dp/p = 5 10-4
• Emittance = 1 micrometer
• Relative energy difference in c.m. = 50 eV
– <1013 cm-2s-1 (10-11 barn-1s-1)
• Problem– Muon cooling and intensity
Phase 1
• Anti protonic exotic ions– ISOLDE, REX-2, AD and the
Intersecting storage ring
• Multi-turn injection with stacking using electron cooling
• Energy range:– Antiprotons: 100 MeV/c– Exotic ions: 5.27 MeV/u (Lorenz beta: 0.106)
Phase 2
• Muonic exotic ions:– ISOLDE– Post accelerator 100 MeV/u– Neutrino factory TARGET– Intersecting storage ring
• Energy range:– Muons: 15 MeV– Ions: 137 MeV/u (beta=0.48)
RAMA Workshop @ CERN February 2001
• Idea
– Intense RNB Facility ( at SPL ? )
– Intense muon source (-factory ?)
– Intense antiproton source (AD+)
• For
– nuclear structure of exotic nuclei
– Fundamental symmetries
– Special cases (charge radii)
– Surprises
Physics case studies: RAMA Workhsop at ECT* Trento in May
• Nuclear structure aspects
• Astrophysics perspectives
• Semileptonic processes in nuclei
• Atomic phenomena
• Techniques and detectors
• Key experiments ?
Acknowledgements
• Alain Blondel, Klaus Jungmann, F. Kottman, L. Simons
• Mats Lindroos, Roland Garoby, + PS-team
• Helge Ravn, Thomas Nilsson
• Karl Langanke, Karsten Riisager, Jules Deutsch, Witek Nazarewicz
• many other experts in the field