A vacuum-sealed compact x-ray tube based on focused carbon nanotube field-emission electrons

被引：119

作者：

Jeong, Jin-Woo ^{[1
]}

Kim, Jae-Woo ^{[1
,2
]}

Kang, Jun-Tae ^{[1
]}

Choi, Sungyoul ^{[1
]}

Ahn, Seungjoon ^{[1
,3
]}

Song, Yoon-Ho ^{[1
,2
]}

机构：

[1] Elect & Telecommun Res Inst, Nano Electron Source Creat Res Ctr, Taejon 305700, South Korea

[2] Univ Sci & Technol, Sch Adv Device Engn, Taejon 305350, South Korea

[3] Sun Moon Univ, Dept Informat Display, Asan 336708, Chungnam, South Korea

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 08期

关键词：

D O I：

10.1088/0957-4484/24/8/085201

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report on a fully vacuum-sealed compact x-ray tube based on focused carbon nanotube (CNT) field-emission electrons for various radiography applications. The specially designed two-step brazing process enabled us to accomplish a good vacuum level for the stable and reliable operation of the x-ray tube without any active vacuum pump. Also, the integrated focusing electrodes in the field-emission electron gun focused electron beams from the CNT emitters onto the anode target effectively, giving a small focal spot of around 0.3 mm with a large current of above 50 mA. The active-current control through the cathode electrode of the x-ray tube led a fast digital modulation of x-ray dose with a low voltage of below 5 V. The fabricated compact x-ray tube showed a stable and reliable operation, indicating good maintenance of a vacuum level of below 5 x 10(-6) Torr and the possibility of field-emission x-ray tubes in a stand-alone device without an active pumping system.

引用

页数：8

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