RADIATION GENERATION DEVICE AND RADIOGRAPHIC DEVICE USING THE SAME

• Main Authors: SUZUKI YOSHIO, TSUNODA KOICHI, YAMAZAKI KOJI, ONO HARUTO
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2015
• Subjects: ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; X-RAY TECHNIQUE

PROBLEM TO BE SOLVED: To suppress occurrence of discharge due to a mismatch between a potential distribution ascribable to a radiation generation tube and a potential distribution ascribable to a step-up circuit substrate, and to achieve miniaturization of a radiation generation device.SOLUTION: A radiation generation device includes: a radiation generation tube 6 that includes an anode 2 having a target 5, a cathode 1 having an electron emission source 4, and an insulation tube 3 connected with the anode and the cathode; and a drive circuit substrate 31 obtained by mounting, on a substrate, an anode terminal 43 electrically connected with the anode, a cathode terminal 41 electrically connected with the cathode, and a step-up circuit, wherein the anode is a transmission-type target and constitutes an end window of the radiation generation tube, the anode terminal and the cathode terminal are positioned apart by a prescribed distance on the substrate, the step-up circuit of the drive circuit substrate is constructed so that a potential increases as a distance from the cathode terminal increases, and a position of a midpoint 65 in a tube axis direction of the insulation tube substantially coincides with a centroid position of a midpoint potential of the drive circuit substrate. 【課題】放射線発生管起因の電位分布と昇圧回路基板起因の電位分布との不整合による放電の発生を抑え、放射線発生装置の小型化を実現する。【解決手段】ターゲット５を備えた陽極２と、電子放出源４を備えた陰極１と、前記陽極と前記陰極と接続された絶縁管３とからなる放射線発生管６と、前記陽極と電気的に接続された陽極端子４３と、前記陰極と電気的に接続された陰極端子４１と、昇圧回路とが基板に実装された駆動回路基板３１と、を備えた放射線発生装置であって、前記陽極が透過型ターゲットであって、前記放射線発生管の端窓を構成し、前記陽極端子と前記陰極端子とは、前記基板において所定距離離間して位置し、前記駆動回路基板は、前記陰極端子からの距離の増加に応じて電位が増加するように昇圧回路が構成されており、前記絶縁管の管軸方向における中間点６５の位置は、駆動回路基板の中点電位の重心位置と実質的に一致していることを特徴とする。【選択図】図１