UL UNIVERSIDADE DE LISBOA CENTRO DE FÍSICA NUCLEAR Nupecc Workshpo on Small-Scale Accelerator...
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Transcript of UL UNIVERSIDADE DE LISBOA CENTRO DE FÍSICA NUCLEAR Nupecc Workshpo on Small-Scale Accelerator...
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/
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
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
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
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
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
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
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
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
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
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.
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
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
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