  We demonstrate a compact ion beam device capable of accelerating H$^+$ and
D$^+$ ions up to 75keV energy, on to a solid target, with sufficient beam
current to study fusion reactions. The ion beam system uses a microwave driven
plasma source to generate ions that are accelerated to high energy with a
direct current (DC) acceleration structure. The plasma source is driven by
pulsed microwaves from a solid-state radiofrequency (RF) amplifier, which is
impedance matched to the plasma source chamber at the ISM band frequency
(2.4-2.5GHz). The plasma chamber is held at high positive DC potential and is
isolated from the impedance matching structure (at ground potential) by a
dielectric-filled gap. To facilitate the use of high-energy-particle detectors
near the target, the plasma chamber is biased to a high positive voltage, while
the target remains grounded. A target loaded with deuterium is used to study
D-D fusion and a B$_4$C or LaB$_6$ target is used to study p-$^{11}$B fusion.
Detectors include solid-state charged particle detector and a scintillation
fast neutron detector. The complete ion beam system can fit on a laboratory
table and is a useful tool for teaching undergraduate and graduate students
about the physics of fusion.
