Control unit for a high voltage installation of X-ray microtomograph

• Published in: IOP conference series. Materials Science and Engineering Vol. 862; no. 6; pp. 62106 - 62110
• Main Authors: Trubitsyn, A A, Polonsky, B A, Grachev, E Yu, Davydov, G V, Agaltsov, K D
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.2020
• Subjects: Circuits; Emission; Ethernet; High voltages; Indication; Parameters; Stabilization; Voltage generators; X ray tubes
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/862/6/062106

A control and indication unit for current operating parameters has been developed for the Spellman XRF-160 high-voltage generator with an output voltage of up to 160 kV, used as part of a high-voltage X-ray microtomograph installation. Thanks to the use of isolating amplifiers in the unit, galvanic separation of the circuits for the formation of control and indication signals with executive circuits of the high-voltage generator is implemented. This makes it possible to virtually eliminate the possibility of the formation of stray ground loops and the flow of dangerous pulsed currents from electrostatic and corona discharges of a high-voltage source in the sensitive circuits of the tomography recording camera and Ethernet communication with the control computer and, as a result, radically increase the reliability of the device. The unit supports the operation of the XRF-160 generator in the modes of stabilization of the output voltage or stabilization of the emission current of the X-ray tube and provides adjustment and indication of the main parameters of the high-voltage installation - the maximum permissible and operating filament current of the cathode, high voltage and emission current of the tube. The unit is assembled in a typical 19-inch case.