| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation generating tube that effectively suppresses electric discharge caused by foreign matters generated inside where a field becomes an intense electric field. ! SOLUTION: In a radiation generating tube 1 formed by bonding a negative electrode 3 to one of openings of an insulation tube 5 and a positive electrode 4 at the other one of the openings, a recess 6 for collecting foreign particles is provided at one of the negative electrode, the positive electrode, and the insulation tube, and the recess 6 is so formed that foreign particles once collected are difficult to exit from the recess 6 by providing a portion at the opening whose width is narrower than a bottom. ! COPYRIGHT: (C)2015,JPO&INPIT |
