recent developments and proposed applications with the...
TRANSCRIPT
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Recent Developments and Proposed Applications with the Accelerators at iThemba LABS
J.L. Conradie, L.S. Anthony, F. Azaiez, S. Baard, F. Balzun, G Bardenhorst, R.A. Bark, A.H. Barnard, P. Beukes,
J.I. Broodryk, J. Crafford, G. Darries, J.G. De Villiers, C. Doyle, H. Du Plessis, W. Duckitt, D.T. Fourie, P.G. Gardiner,
M.E. Hogan, I.H. Kohler, J. Lawrie, C. Lussi, N.R. Mantengu, S. Marsh, V. Mbele, R.H. McAlister, J.P. Mira, H.W. Mostert,
C.B. Mtshali, A.S. Miller, S.M. Mullins, C. Naidoo, F. Nemulodi, M.M. Nkosi, O. Pekar, C.A. Pineda-Vargas,
W.J. Przybylowicz, M. Sakildien, G.F. Steyn, N.P. Stodart, R.W. Thomae, M.J. Van Niekerk, P.A. van Schalkwyk,
T.P. Sechogela, S. Winkler and S. Woodborne
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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Officially founded on 6 April 1652
Cape Town – “Mother City”
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Accelerators at iThemba LABSK200 Separated Sector Cyclotron
K8 Injector Cyclotron 2
K8 Injector Cyclotron 1
6 MV EN Tandem AMS K11 Cyclotron - FDG PET Isotopes3 MV Tandetron
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Outline of the Talk
• New tandetron accelerator and applications
• AMS applications with 6 MV tandem accelerator
• Proposed new isotope production facilities
• New radioactive ion beam facility
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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Replacement of the 52 years old Van de Graaff
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New tandetron accelerator installed
• Commissioned in May 2017 .
• With 6 MeV proton delivered from multicusp ion source with 200 µAcurrent
• With Multicusp source for He-ions production
• With Cesium sputtering source for heavy ions, tested with Si-ions
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ION-BEAM INTERACTION AND SURFACE CHARACTERIZATION OF MATERIALS BY ION BEAMS
Materials Research Department (MRD)
www.tlabs.ac.za
CN 6 MV Van de Graaff accelerator
The past 50-years:
- Low energy nuclear physics- Nuclear analytical chemistry- Ion Beam Analysis (RBS, NMP)
The FUTURE:- Low energy nuclear reactions for Astrophysics- Chatracterization of nano-structures materials with nanometer ion beams sizes- Ion Beam Analysis: in-situ RBS, Cryo-NMP, HI_ToF_ERDA, HE-PIXE- IBA in tandem with e-beam deposition- External beam for Archeaometry and materials sciences - Ion implantation, radiation hardness- Enviromental sciences
3.0 MV TANDETRON
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SURFACE CHARACTERIZATION OF MATERIALS BY ION BEAM ANALYSIS
Materials Research Department (MRD)
www.tlabs.ac.za
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
PAST Techniques
FUTURE Techniques
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SURFACE CHARACTERIZATION OF MATERIALS BY ION BEAM ANALYSIS
Materials Research Department (MRD)
www.tlabs.ac.za
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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AMS Department, based at
University of the Witwatersrand
Accelerator Mass Spectrometry (AMS) FacilityUnveiled in 2014
14C dating: 60 000 years
Other isotopes (10Be, 36Cl, 26Al): 1 – 10 My
6 MV Tandem (Gauteng): Previously Schonland Research Centre of the University of the
Witwatersrand Extensively refurbished and Fitted with a Ion Source for Accelerator Mass
Spectrometry
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SNICS Ion Source
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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High-energy extraction
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Detector for AMS
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“Support the country's universities to produce a critical mass of palaeoscience researchers with a range of research, technical, curatorial, public engagement and managerial skills and drive knowledge production and exploitation to make South Africa a world centre of scientific excellence in the palaeosciences”
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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DrakensbergY = 6 m/Ma
X = 50-90 m/Ma
Namib EscarpmentY = 0.4 m/MaX = 10 m/Ma
Namib Desert0.5-1 m/Ma
SA Interior1.5-3 m/Ma
<4 m/Ma
Kruger National Park3-6 m/Ma
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Cosmogenic dating in South AfricaBurial Dating
Stw 573 – “Littlefoot”Sterkfontein
4.02 Ma(Partridge et al. 2003)
Australopethicus sedibaMalapa
1.95 - 1.78 Ma(Dirks et al. 2003)
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iThemba AMS-based Research
-28
-27
-26
-25
-24
-23
-22
1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
δ1
3C
Wet
Dry
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SANAPAntarctic Program
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11 MeV Cyclotron for PET isotope production
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Separated-Sector Cyclotron FacilitySeparated-Sector Cyclotron Facility
0 10 20 m
beambeamswingerswinger
SSCSSC
SPC1SPC1SPC2 SPC2
Polarized ion sourcePolarized ion source
ECR ion sourceECR ion source
RadioisotopeRadioisotope production production
Neutron therapyNeutron therapy
SpectrometerSpectrometerTarget vaultsTarget vaults
electronicselectronics electronicselectronics
Proton therapyProton therapy
20
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4.4 MVA Uninterruptible Power Supply
New Battery Bank for the UPS
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New Digital Low Level RF Control System
• Modular Design
• Digitally
programmable
• 16 bit Amplitude
resolution
• Operates between 5
and 100 MHz
• Programmable in
steps of 1 µHz
• Phase resolution in
steps of 0.0001º
• EPICS based
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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EXCOM 19 August 2016 JL Conradie
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25
Increase beam intensity (66 MeV protons)
for isotope production
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Radionuclide Half-Life (days/years)
Nuclear Reaction Product Main Use
82Sr 25 days Rb(p,xn)82Sr Produced as a radionuclide
Used to manufacture
82Sr/82Rb generators
68Ge 271 days Ga(p,xn)68Ge Produced as a radionuclide
Used to manufacture
68Ge/68Ga generators or used
for calibration of gamma camera’s
or PET CT scanners
88Y 106.6 days Sr(p,xn)88Y Produced as a radionuclide
Non –medical application
109Cd 453 days Ag(p,xn)109Cd Produced as a radionuclide
Non-medical application
22Na 2.602 years Mg(p,n)22Na Produced as a radionuclide
Positron Annihilation
Studies
Current Radionuclides in routine production list continue
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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Radionuclide Half-Life (hours)
Nuclear Reaction Radiopharmaceutical
Product
Main Use
18F 1.83 15O(p,n)18F 18F-FDG Glucose metabolic studies
67Ga 78.3 Zn(p,xn)67Ga
Ge(p,x)67Ga
67Ga-citrate Localization of certain tumours and
inflammatory regions
81Rb/81mKr 4.58 Kr(p,xn)81Rb 81Rb/81mKr generator Lung ventilation studies
123I 13.2 127I(p,5n)123Xe 123I
123I-sodium iodide 123I-mIBG
Thyroid studies
Localization of certain tumours
such as neuroblastoma,
pheochromocytoma
Current Radiopharmaceuticals in routine production
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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New Isotope Production Facilities for iThemba LABS
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ACE ISOTOPES
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Company: IBA
CYCLOTRON 70Company: Best Cyclotron Systems
BEST 70p Cyclotron
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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Vacuum:
Beam test on 50kW INFN target
500µA
6x10-8 Torr
21st ICCA, Zurich, September 13, 2016
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Beam losses measured at various current.
Beam losses = [%]
Unaccounted currents have been measured as the difference between extractor probe current and sum of all beam line currents (slits, baffles and target currents)
Beam line losses
Unaccounted Beam currents
Extracted Beam currents
Beam current on target Value
300 µA 0.2%
400 µA 0.5%
500 µA 0.5%
21st ICCA, Zurich, September 13, 2016
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Low Energy Rare Isotope Beam Facilities at
iThemba LABS
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Front End assembly as installed in the RIB off-line test
facility at iThemba LABS
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CAD drawing of the SPES target assembly,showing the UCx disks (yellow) in a graphitetube and also the beam dump disks (darkgrey). [SPES 2010]
The SPES target (chamber lid removed),designed for a 40 MeV proton beam enteringfrom the right. The heating current flowsthrough the Ta tube, between the copperclamping bars at each end. The small centraltube connects the target chamber to the ionsource. [Andrighetto 2011]
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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Expected yields of singly-charged radioactive ions from the LERIB target-ion-source, when a UCx target is bombarded by 50µA of 70 MeV protons
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ACE-Beams - Phase 2
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017
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Thank You
ANS Conference13th International Topical Meeting on Nuclear Applications of Accelerators
Hilton, Quebec, Quebec City, Quebec, Canada31 July – 4 August 2017