Development of an X-ray tube for irradiation experiments using a field emission electron gun

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• 作者：Hidetoshi Kato^a ; ^{katou-h@aist.go.jp" class="auth_mail" title="E-mail the corresponding author} ; Brian E. O׳Rourke^a ; Ryoichi Suzuki^a ; Jiayu Wang^b ; Takashi Ooi^b ; Hidetoshi Nakajima^b
• 关键词：X-ray source ; Carbon nano-structures ; Electron emission ; Long lifetime
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：21 January 2016
• 年：2016
• 卷：807
• 期：Complete
• 页码：41-46
• 全文大小：3660 K

文摘

A new X-ray tube using a ring-shaped emitter as a field emission electron source has been developed. By using a ring shaped cathode, X-rays can be extracted along the axial direction through the central hole. This cylindrically symmetrical design allows for the tube to be arranged in the axial direction with the high voltage target at one end and the X-ray beam at the other. The newly developed X-ray tube can operate at a tube voltage of more than 100 kV and at a tube current of more than 4 mA, and can be used for irradiation experiments with an irradiation dose range from mGy up to kGy. The X-ray tube can be used immediately after turning on (i.e. there is no stand-by time). In the experimental model, we demonstrated stable electron emission at a tube voltage of 100 kV and at a tube current of 4 mA during a 560 h continuous test.