The Kilovoltage X-ray facilities consist of two X-ray tubes covering the ‘superficial’ and ‘orthovoltage’ radiotherapy treatment ranges. The superficial X-ray tube is an RT100 tube set up to provide irradiations from 10 to 100 kVp. The orthovoltage x‑ray tube is a Seifert Isovolt tube capable of continuous operation between 30 and 300 kVp. Both tubes have stationary tungsten targets and are water cooled for continuous operation. The Seifert has a constant potential waveform. Both tubes are fitted with monitor chambers to allow for compensation of any change in tube output.
The free air chambers in the two facilities are shown below.