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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
People:
Senior Researchers (responsible for activity lines):
Eduardo Alves (Head of Lab)
Adelaide Pedro de Jesus
Luís Cerqueira Alves
Miguel Reis
Nuno Barradas
Rui Coelho da Silva
Teresa Pinheiro
Ulrich Wahl
ITN/CFNUL Ion Beam Laboratory
http://cfnul.cii.fc.ul.pt/
http://www.itn.pt/
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
ITN/CFNUL Ion Beam Laboratory
Van de Graaff 2.5 MV
DanFisik Implanter 210 kV
General Ionex Cockroft-Walton tandetron 3 MV
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Van de Graaff
2.5 MV, 10 A (protons); H, He ions
Lines:
PIXE/Nuclear Reactions
RBS, Chan, ERDA
- probe
PIXE analysis of environmental, biomedical, material science, geological, art,….. samples
Nuclear Reactions for astrophysicsDevelopment of a PIGE methodology
Advanced Materials:Wide bandgap semiconductors and oxides Nuclear fusion reactor materials and mineralogical samples. Multiple quantum wells and quantum dots.
Materials ScienceBiomedicineEnvironmentArchaeometry and ArtMineralogy
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
RBS & Channeling
PIXE
Bending Magnet
Switching Magnet
Stabilising slits
Object aperture
Collimator aperture
Scan coils
Quadrupole lenses
Si(Li)
TargetA
A
2.0
m4.
30 m
1.0
m
Van de G raaff
Concrete table
M
A - Surface barrier detectorsM - Microscope
A nalytical TechniquesP I XER B SSTI MCSTI MI B I CI B I L
~100 pA for PIXE and RBS(Res. ~ 34 µm2)
Spatial Resolution
~1 fA transmission work(Res. 1 1 µm2)
Oxford Microbeams triplet system with OMDAQ and DAN32 software
STIM – Scanning Transmission Ion MicroscopyCSTIM – Channeled STIMIBIC – Ion Beam Induced ChargeIBIL – Ion Beam Induced Luminescence
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UL UNIVERSIDADE DE LISBOA
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Advanced Materials for Nuclear Fusion Reactors
6Li(n,)3HLi ceramic breeders
ITER International Thermonuclear Experimental Reactor
StructureStainless steels
SiC composites
Be as neutron multiplier 9Be(n,2n)2
Impurities - generation of long-lived isotopes
Chemical reactions
Objectives
CENTRO DE FÍSICA NUCLEAR
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UL UNIVERSIDADE DE LISBOA
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Advanced Materials for Nuclear Fusion Reactors
CENTRO DE FÍSICA NUCLEAR
Titanium Beryllides
Objectives:Structural characterisation.Oxidation after annealing in air at 800º C.
530 µm
Ti
Fe
200 400 600 800 10000
20
40
60
80
100
120
140
160
180
Ti
O
virgem 800ºC 2h 800ºC 16h
Co
un
ts
Channel
Be 5Ti
Be
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UL UNIVERSIDADE DE LISBOACENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Sb Ga In
Max.
Min.
1060 µm
Crystal qualityManufacturing Control
200 400 600 800 1000 1200 1400 1600 1800 2000100
101
102
103
104
105
In L
Sb K
In K
Sb L Ga K
Co
un
ts
Channel
200 400 600 800 1000 1200 1400 1600 1800 2000100
101
102
103
104
105
In L
Sb K
In K
Sb L Ga K
Co
un
ts
Channel
200 400 600 800 1000 1200 1400 1600 1800 2000100
101
102
103
104
105
In L
Sb K
In K
Sb L Ga K
Co
un
ts
Channel
ThermoPhotoVoltaic cell
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Fe Cu
Pb Zn
Ancient stained glass
Glass and paint compositionCorrosion studies
Cross section analysis
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
External Microbeam end-station
External Microbeam end-station
13.2 mm
42
53
1
150 mm
1 - exit nozzle + 100 nm thick Si3N4 membrane 2 - X-ray detector3 - RBS detector4 - microscope5 - vacuum chamber
0 20 40 60 80 100 120 140
50
100
150
200
250
Inte
ns
ity
(a
.u.)
Distance (µm)
0 20 40 60 80 100 120 140
50
100
150
200
250
Inte
ns
ity
(a
.u.)
Distance (µm)
490 µm
500 µm
100 µm
HorizontalGaussian FWHM = 70 µm
VerticalGaussian FWHM = 75 µm
Going on Developments
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
General Ionex Cockroft-Walton tandetron 3MV
NEC Alphatros ion source for He beams Negative ion direct-extraction Duoplasmatron ion
source for H- beams. HICONEX Cs beam multielement negative ion
source
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
15 eV resolution (Transition Edge Superconductor -TES) detector
Tandem new lines of activity
Molecular speciation from PIXE spectra
Heavy Ion Elastic Recoil Detection analyses (HIERDA) – A ToF system is under construction to profile light ions using either Cl or I beams.
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Tandem new lines of activity
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Tandem new lines of activity
HICONEX Cs microbeam (30-300 m) multielement ("AUSTRALIS") negative ion source C Conventional HICONEX Cs beam multielement negative ion source
Two beamlines for AMS:
A) for 14C dating: 2 off-center Faraday cups for parallel current measurementof 12C3+ and 13C3+, while the 14C3+ detection is by means of an electrostatic analyzer and a gas proportional counter.
B) Heavy ion ("AUSTRALIS") beamline: The magnet is able of analyzing 6+ (or higher charge state) ions of all elements up to U at 2.5 MV terminal voltage.Sequential analysis of different isotopes (around +-3% of center mass) in the magnet is possible by means of the "fast bouncing" technique, i.e. by means of electrostatic deflectors which can be switched at >10 ms time intervals
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UL UNIVERSIDADE DE LISBOA
CENTRO DE FÍSICA NUCLEAR
Nupecc Workshpo on Small-Scale Accelerator Faccilities, Crete 7-8 September 2007
Tandem new lines of activity
Astrophysics Programme
Feasibility Study of AMS for the reaction:
51V(3He, n)53Mn
Carbon burning processes
(collab with Claus Rolfs)
Particle
Gamma
Reaction product (AMS)
Detection
High current ion source
Reaction beam line
Each case is a new case