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NuPECC Brussels 2009
The Cyclotron Research Centre
of Louvain-la-Neuve:
Present status
Marc Loiselet
UCL, Centre de Recherches du Cyclotron
Louvain-la-Neuve (Belgium)
NuPECC Brussels 2009
NuPECC Brussels 2009
Since 2007, a new agreement between UCL and the national funding agency (IISN) has been signed.
New UCL research lines around the cyclotrons
High energy physics, in collaboration with the microelectronic department, -study of the radiation hardness of semiconductor detectors used in LHC-development of radiation hard components
High energy physics / nuclear physicsUse of radioactive beams for the neutrino beams
(European collaboration : Beta-beams)
NuPECC Brussels 2009
Applied research
o Radiobiology
o Material department: development of new material
based on track etched membranes second generation membrane
NuPECC Brussels 2009
What about the future of the LLN RIB facility?
The nuclear physics program has been stopped:o UCL: no new academic position in nuclear
physics.o EU: end of the EURONS program
November 2008: last radioactive beam ?
~720 h of RIBs in 2008
Interest of several EU-groups of RIB users ....
The facility could be restarted IF supported by
external fundings (EU?)...
NuPECC Brussels 2009
Cyclotron lab = technology platform of UCL
Research High energy physics
-radiation hardness
-beta-beams Radiobiology Micro-
Nanotechnology MEMS Second generation
membranes
Services ESA- facilities
Radiation hardness tests
Heavy Ions (HIF) Light Ions (LIF) Neutrons (nIF)
Membranes
NuPECC Brussels 2009
High Energy Physics Research study of the radiation hardness of semiconductor
detectors used in LHC innermost layers of CMS detector: silicon
microstips detector
after 10 years of LHC operation: 1014
neutr/cm²(1Mev/equiv.)
caracterisation of the detector behaviour
LHC upgrade: * 10 !
development of radiation hard components in collaboration with the microelectronic
department of UCL
NuPECC Brussels 2009
LLN irradiation facilities
HIF: heavy ions
LIF*: light ions
Neutrons
facilities
o Mono-energetic
neutrons
o High flux
NuPECC Brussels 2009
Neutron Lines (NIF)
Two lines are available:
Mono Energetic Line
High Flux Line
50 MeV d (10 μA ) on a Be converter
7.3 * 1010 neutrons/cm².s at 9 cm from target
NuPECC Brussels 2009
High energy- nuclear physics: neutrino beams
radioactive ion beams for the production of neutrino beams
Ex: He-6 -> Li-6 + e- + anti-neutrino
Ne-18 -> F-18 + e+ + neutrino
at rest, isotropic emission of neutrinos
at v≈ c, neutrinos emitted in a narrow cone
in the forward direction -> neutrinos beam
NuPECC Brussels 2009
Distinctive feature of the beta-beams:
the neutrino beam only contains a single type of neutrino flavour:
electron-neutrinos (or anti-neutrinos)no muon-neutrinos
Important for neutrino oscillation experiments
NuPECC Brussels 2009
-beam baseline scenario
•PS
•SPS
•ISOL target •& Ion source
•SPL
•Cyclotrons
•Storage ring •and fast •cycling •synchrotron
•Decay
•Ring
•Decay ring
•Brho •= 1500 Tm
•B = 5 T
•L•ss •= 2500 m
• •.•1•
•
•
•18•9
•6•3
•6•2
•e•F
•e•Li•He 6He-> 6Li +e- +
18Ne-> 18F +e+
+ν
NuPECC Brussels 2009
Which radioactive nuclei ?
FP6: EURISOL_Design Study collaboration,
the selected nuclei are: Ne-18 (β+ ,T1/2= 1.7s )
He-6 (β- ,T1/2= 0.8s )
Among the (many) challenges:
bottle neck at the low energy part of the
acceleration chain
how to produce these elements?
how to ionize them ?
GOAL: a few µAp of RIB (at least!)
NuPECC Brussels 2009
Which radioactive nuclei ?
FP7: EURO-NU collaboration,
new idea (C. Rubbia) : a dedicated low energy ring
for the production of B-8 (β+ ,T1/2= 0.8s )
Li-8 (β- ,T1/2= 0.8s )
reaction: Li-6 + He-3 -> B-8 + n
Li-7 + D -> Li-8 + p
B-8 or Li-8 are emitted in a ~10°
cone
Li energy : 20….30 MeV
NuPECC Brussels 2009
Low energy ring for the production of Li-8, B-8
Ex: Li-7 + D-> Li-8 + p
beam: ~25 MeV Li-7
D2 gas jet target (wedge)
collection device for the Li-8 ok , for B-8 …?! “Table top ring”
NuPECC Brussels 2009
UCL participation in EURO-NU: study of the “collection device”
How to extract Li-8 and B-8 from the device?Li-8 : okB-8? chemically reactive element
Experimental study with the cyclotron beams
NuPECC Brussels 2009
2009: 20th anniversary of radioactive beams (post-accelerated)
1989, June 21: first (post-accelerated) beam
13N (T1/2)= 10 min~106 pps