Repetitive compact flash x-ray generators for soft radiography

Abstract

The construction and the fundamental studies for the repetitive flash x-ray generators designed by Japan Impulse Laboratory in Iwate Medical University are described. These generators are classified to the following two major types: (1) generators having diodes, and (2) generators having triodes. In order to generate high-voltage impulses, we employed the following transmission lines (pulsers): (a) high-voltage-inversion type with a maximum output voltage V<SUB>om</SUB> of about 80 kV, (b) high-voltage- inversion type having a coaxial cable (V<SUB>om</SUB> equals 130 kV), (c) two-stage Marx pulser (V<SUB>om</SUB> equals 150 kV), (d) two-cable-type Blumlein (V<SUB>om</SUB> equals 120 kV), (e) modified Blumlein (V<SUB>om</SUB> equals 120 kV), (f) fundamental transmission line for triode (V<SUB>om</SUB> equals 100 kV), and (g) transmission line for an enclosed triode (V<SUB>om</SUB> equals 100 kV). Using these generators we succeeded in performing high-speed radiography as follows: (a) delayed radiography; (b) multiple-shot radiography; and (c) cineradiography.