X-RAY TUBE AND X-RAY GENERATOR

• Main Authors: MORIYA JUNICHI, KIBA HIROYUKI, TAKAHASHI YOSHIFUMI, KURISU SHINKI
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; X-RAY TECHNIQUE

To provide an X-ray tube and an X-ray generator with which it is possible to detect the degree of vacuum in an early high vacuum region with high accuracy, as well as prevent abnormal electric discharges and monitor a life length.SOLUTION: Provided is an X-ray tube comprising a package 11 for holding the inside at a prescribed degree of vacuum, a filament 12 for electron emission and a focusing electrode 13 provided in the package 11, and a target 15 for X-ray generation which is provided facing the filament 12 and the focusing electrode 13 in the package 11. The package 11 includes a package body 11a and an X-ray window part 16 the X-ray permeability and electric conductivity of which are higher than those of the package body 11a, the X-ray window part 16 or an anode 14 being set to a lower potential than any of the anode 14 or the X-ray window part 16 and the filament 12 and the focusing electrode 13, thereby making it possible to detect at least one of an ion current Ii and an electron current Ie via the X-ray window part 16 or the anode 14.SELECTED DRAWING: Figure 1 【課題】初期の高真空領域の真空度を高感度に検出でき、異常放電の未然防止や寿命時期を監視可能なＸ線管およびＸ線発生装置を提供する。【解決手段】内部を所定の真空度に保持する外囲器１１と、外囲器１１内に設けられた電子放出用のフィラメント１２および集束電極１３と、外囲器１１内にフィラメント１２および集束電極１３に対向して設けられたＸ線発生用のターゲット１５とを備えたＸ線管であって、外囲器１１が、外囲器本体１１ａと、外囲器本体１１ａよりＸ線透過率および電気伝導率が高いＸ線窓部１６とを有しており、そのＸ線窓部１６または陽極１４が、陽極１４またはＸ線窓部１６と陰極のフィラメント１２および集束電極１３とのいずれよりも低電位に設定されていることで、Ｘ線窓部１６または陽極１４を介してイオン電流Ｉｉと電子電流Ｉｅとの少なくとも一方の電流を検出可能である。【選択図】図１