Diapositive 1

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Non accelerator particle physics

• Neutrino properties
• future (reactor, source), low E
  (Borexino, Kamland,...)
• absolute mass scale
• Dark matter
• direct searches WIMP?
• Dark energy
• Proton decay
• future
  
• (UNO,...) ( extra galactic SN n)

CMB, high z SN
(Flat universe)
J.-L. Vuilleumier, 30/9/03
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q13, or Ue3d
Y. Giomataris and J.D. Vergados
3H 3Henee- (Q18.6 keV) 6x1018
n/s Tmax1.27 keV Eth200 eV
Xenon(?) at 1 bar R determined from lateral
diffusion
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d(n)
u(p)
-
e
W
W
-
e
d(n)
u(p)
d(n)
u(p)
W
W
u(p)
d(n)
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Next experiments large mass
low background, better signature, good
energy resolution NEMO 10 kg
of 100Mo in tracking device Majorana
500 kg of 86 enriched 76Ge
10 cryostats with 21 crystals (2.4 kg each) ,
segmented readout CUORICINO, 42kg , 760 kg
130Te, 56, 1000 crystals of TeO2, operated as
CUORE bolometers (8 mK)
GENIUS 0.1, 1 t, 10 t of 76Ge
crystals, immersed in lN2 EXO 200
kg, 1 t, 10 t of 136Xe in TPC
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Enriched Xenon Observatoryfor double beta decay
Alabama, Caltech, Colorado, UC Irvine, ITEP
Moscow, Neuchatel, Seattle, Stanford, SLAC
136Xe 136Ba e- e- final state can be
tagged using optical spectroscopy
(M.Moe PRC44 (1991) 931)
Much improved signature!
Ba system best studied (Neuhauser, Hohenstatt,
Toshek, Dehmelt 1980) Very specific signature
shelving Single ions can be detected from a
photon rate of 107/s
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Two detector options under consideration

• High Pressure gas TPC
• 5-10 atm, 50 m3 modules,
• 10 modules for 10 t
• Xe enclosed in a non-structural bag
• b range 5-10cm
• can resolve 2 blobs
• 2.5m e-drift at 250kV
• Readout Xe scintillation with
• WLSB (T0)
• Additive gas quenching and
• Ba Ba
• Steer lasers or drift Ba-ion to
• detection region

• Liquid Xe chamber
• Very small detector (3m3 for 10tons)
• Need good E resolution
• Position info but blobs not resolved
• Readout Xe scintillation
• Can extract Ba from hi-density Xe
• Spectroscopy at low pressure
• 136Ba (7.8 natl) different
• signature from natural Ba
• (71.7 138Ba)
• No quencher needed, neutralization
• done outside the Xe

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Energy resolution
F0.19, W22 eV
Grid (metallic cloth)
e- track
UV photons
Multianode photomultiplier
Anode (charge)
Two gap scheme
Grid (metallic cloth)
Optical fibers x-y
Doped fibers 1 step WLS UV (180
/-20nm) to blue or 2 step WLS with coated
fibers
anode
Fibers (250 mm)
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Assuming Xe chamber Ba tagging gives 0
background from radioactivity...

(2nbb!)
Conclusion With a coordinated effort, the meV
region is within reach!
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WMAP
CMB
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high z SN Ia searches
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Future, satellite experiments CMB Planck (ESA)
2007 better angular resolution
(high multipoles) SN SNAP (NASA)
wide field (2000 SN per year))