| 摘要 |
PURPOSE:To obtain a precise amount of X-ray irradiation by measuring part of X-ray irradiating a subject through a take-out window provided between a pinch plasma and the subject and controlling an X-ray generator according to the measured value. CONSTITUTION:Part of X-ray 7 generated by a pinch plasma 6 irradiates a subject 9 through an X-ray take-out window 8. A sensor 12 mounted to a portion of a support 14 for the subject 9 detects part of the X-ray 7. The output thereof is compared with a reference value by a comparator 13 and is utilized for controlling the amount of gas from a gas supplier 10 and the current value from a pulse power source 1, or controlling the operating condition such as the shutdown upon reaching a predetermined amount of X-ray. In this system, the part of X-ray actually irradiates the subject 9 is detected so that even if a discharge product is deposited on the window 8, correct measurement of the irradiated amount of X-ray, hence accurate control of the X-ray generator can be effected. |
