Abstract
A new type of bolometric array diagnostic system has been developed for HT-6M tokamak and HT-7 superconductor tokamak plasma physics experimental research. This system is composed of temperature-sensitive detectors of gold film resistor and phase-sensitive rectifiers of the bridge excited by square waves. With this system, a radiation detection limit of 192.0 μW cm −2 at a spatial resolution of 2.0 cm and a temporal resolution of 1.0 mS. The system features a high temperature baking resistance, ultra high vacuum endurance, sufficient insensitivity to radiation damage, sufficient suppression of electromagnetic interference, good long-term stability, high radiation sensitivity and measurement data reliability. Absolute calibration of the detectors is performed simultaneously and in situ by means of a built-in electronic power pulse.
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