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The CSIRO-GEMOC Nuclear Microprobe

System Overview

Lens System

Beam Shaping Controls

Scanning, Beam Deflection


Data Acquisition and Analysis

Target Chamber

Return to NMP microanalysis

System Overview

The CSIRO-GEMOC Nuclear Microprobe (NMP) uses a new CSIRO design that closely integrates the beam forming lens system with the chamber, microscope and detector systems to provide good focussing performance, a normal viewing microscope and large solid-angle detectors [1,2,3]. These features are the key to its high level of performance for geological applications.

The key to this design is a new quadrupole quintuplet lens system which uses a novel design for each quadrupole, with pole-tip extensions and yoke cut-outs for detectors, permitting an effective working distance of 80 mm and unrestricted access for detectors at 135°.

Further features of the new probe include: large area X-ray, gamma-ray and particle detectors, digital signal processors, electrostatic on-demand beam-switching and scanning, Questar long-range microscope, computer-controlled sample goniometer, sample-change vacuum-lock, anti-vibration mounting, and efficient beam shaping using computer-controlled object and divergence limiting slits.

[1] C.G. Ryan, D.N. Jamieson, W.L. Griffin, G. Cripps and R. Szymanski, "The New CSIRO-GEMOC Nuclear Microprobe: First Results, Performance and Recent Applications", Nucl. Instr. Meth. B181 (2001) 12-19.

[2] C.G. Ryan, D.N. Jamieson, W.L. Griffin and G. Cripps, "The CSIRO-GEMOC Nuclear Microprobe: A high-performance system based on a new closely integrated design", Nucl. Instr. Meth. B158 (1999) 97-106.

[3] C.G. Ryan and D.N. Jamieson, "A high performance quadrupole quintuplet lens system for the CSIRO-GEMOC Nuclear Microprobe", Nucl. Instr. Meth. B158 (1999) 18-23.

For further information contact: Dr Jamie Laird or Dr Chris Ryan
Phone +61-3-8344 8375
Fax orders +61-8-6436 8586
CSIRO Earth Science and Resource Engineering
c/o School of Physics, University of Melbourne, VIC 3010, Australia
CSIRO Australia

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