Thermistor for ion beam calorimetry

A calorimeter is described which is designed for measuring the parameters of low-energy ion beam. The calorimeter is a thermistor of a thin (10 to 50 mcm dia.) tungsten filament wound over a frame. It serves at the same time as a beam current sensor. The capacity time lag of the instrument provides for measurements with a high noninterference of electromagnetic noise. The calorimeter has a good linearity relative to the beam current variation and pulse duration. The accuracy of the particle energy measurement is about 10 %. The results are presented of the calorimeter testing with ion beams. The calorimeter sensitivity attains 200 deg C/J