Nuclear Microprobe Group
Ion Beam Microprobe
(SRCNS), RJ Hart (Council for GeoSciences), M Andreoli (Atomic Energy Corporation),
E Sideras-Haddad (SRCNS), JPF Sellschop (SRCNS), J Butler(NRL), BP Doyle
(SRCNS), IZ Machi (SRCNS), R Maclear (SRCNS), DB Rebuli (SRCNS)
E Rood, R Chirwa, O Pekar, M Rebak
of Geosciences), W Przybylowicz, C Smith (AARL), S Bartolucci- Luyckx (Metallurgy),
R Boer (Geology), L Freeman (Geology), M Tredoux (UCT), W Przybylowicz (NAC),
HJ Annegarn (Schonland), JIW Watterson (Schonland), A Wittenberg (U Hannover)
- The Schonland Microprobe Facility
- Types of Research Projects
- A slide show to Introduce the Microprobe
- Images of the facility
The Schonland Microprobe
Facility is one of 43 world wide. It is unique in some respects.
- It can
be supplied with both high luminosity proton beams up to 2.5 MeV from a
Van de Graaff accelerator as well as high-energy heavy- ion beams from the
EN tandem. Logged and routine achievements for protons are 2nA into 5mm
spots with 3 mm being the limiting PIXE spot at a few hundred pA. STIM proton
resolutions of 0.5 mm have been achieved (<fA). The high energy heavy
ions have less luminosity, but they represent a novel development, enabling
high contrast STIM tomography as well as 3-D light-ion imaging capability.
- It has
the Oxford Microbeam
lenses, still contested as being the superior lens system. It has the
proprietary Oxford Microbeam data acquisition system, enabling all features
for ion- beam microscopy that are currently considered to be at the frontiers.
These include software driven scanning in a wide variety of modes, as well
as listmode acquisition and playback. Extensive intelligence is built into
the acquisition of PIXE and RBS spectra, so that substantial real time
analysis is possible.
is full integration into all Windows 95 applications. This enables rapid
production of quality output.
for PIXE analysis is via the GUPIX program, RBS analysis is via RUMP. Our
own software is used for all other data reduction.
PAW++ (the software developed for large CERN collaborations) was ported in
our lab to a PC environment and front-ended to a CAMAC based multi-parameter
event handler. This has enabled fluid inclusion research (geological) at
vastly improved sensitivity as well as the next generation of increased efficiency
- The microprobe
chamber is fully automated mechanically, electronically and in the vacuum
systems. The chamber exhibits the full suite of conventional Ion Beam Analysis
techniques, implemented in micro-scanned mode.
Types of Research Projects
The unit provides
a suite of Ion-Beam Analytical techniques (in micro-scanning mode).
(Proton Induced X-ray Emmission)
(Scanned Transmission Ion-beam Microscopy)
(Nuclear Reaction Analysis)
(Elastic Recoil Detection Analysis)
- in conjunction with PIXE, ERDA, NRA, RBS etc.
of (good) (multi-disciplinary) research by the provision of a user-friendly
and reliable infrastructure (instrumentation, operators, computational facilities,
development of microprobe instrumentation, focusing on aspects - new and
unique to the laboratories capabilities.
the User base as well as encouraging commercial customers (in research projects).
Aiming at convincing the Faculty of the value of the facility in the longer
Images of the facility
Microprobe End Station
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Last Updated: 31 February 2002