Electron Optics Simulations of CNT-based x-ray Source Operating at Low Gate Voltage

被引：0

作者：

Lee, Tae Dong ^{[1
]}

Ryu, Seong-Ryong ^{[1
]}

Oh, June Hee ^{[1
]}

Park, Han-Sol ^{[1
]}

Woo, Se-Hyun ^{[1
]}

Lee, Dong-Gu ^{[1
]}

Kim, Yong C. ^{[2
]}

Han, In T. ^{[2
]}

机构：

[1] Kumoh Natl Inst Technol, Dept Opt Engn, Gumi, South Korea

[2] Samsung Adv Inst Technol, Adv Mat Lab, Yongin, South Korea

来源：

2012 25TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC) | 2012年

关键词：

CNT x-ray source; line emitter; simulation;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

It is crucial to develop a CNT-based x-ray source operating at low gate voltage with high emission current density. We have performed electron optics simulations for a few potentially effective structures. For higher emission current at lower gate voltage, it is desirable to use an emitter shape with higher field enhancement factor. We have devised a structure with line emitters with a rectangular cross-section located at the center of gate opening. Extensive electron optics simulations showed that it operates at considerably lower voltages than the structure with flat emitter. Geometrical parameters including mesh gate opening size, and the width and height of emitter have been optimized. The optimum values were determined by compromising the emission current and the gate transmission rate.

引用

页码：300 / +

页数：2

共 7 条

[1] Dynamic radiography using a carbon-nanotube-based field-emission x-ray source
Cheng, Y
Zhang, J
Lee, YZ
Gao, B
Dike, S
Lin, W
Lu, JP
Zhou, O
[J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2004, 75 (10) : 3264 - 3267
[2] Design and characterization of a spatially distributed multibeam field emission x-ray source for stationary digital breast tomosynthesis
Qian, Xin
Rajaram, Ramya
Calderon-Colon, Xiomara
Yang, Guang
Phan, Tuyen
Lalush, David S.
Lu, Jianping
Zhou, Otto
[J]. MEDICAL PHYSICS, 2009, 36 (10) : 4389 - 4399
[3] Ryu Seong-Ryong, 2003, J KIEEME, V16, P1023
[4] Carbon nanotubes as electron source in an x-ray tube
Sugie, H
Tanemura, M
Filip, V
Iwata, K
Takahashi, K
Okuyama, F
[J]. APPLIED PHYSICS LETTERS, 2001, 78 (17) : 2578 - 2580
[5] Sultana Shabana, 2010, THESIS UNC CHAPEL HI, P116
[6] Yang G., 2008, P SPIE PHYS MED IMAG, V6913
[7] Generation of continuous and pulsed diagnostic imaging x-ray radiation using a carbon-nanotube-based field-emission cathode
Yue, GZ
Qiu, Q
Gao, B
Cheng, Y
Zhang, J
Shimoda, H
Chang, S
Lu, JP
Zhou, O
[J]. APPLIED PHYSICS LETTERS, 2002, 81 (02) : 355 - 357

← 1 →