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.
 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
 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)
 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.