A micro-fabricated sheet-beam Orotron THz source

Papadakis, S. J.; Hoffmann, Joan A.; Monica, A. H.; Deglau, David M.; Yu, Jieun; Antonsen, Thomas M.; Nusinovich, Gregory S.; Osiander, Robert

doi:10.1117/12.884158

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbon nanotube (CNT) has been intensively studied as a prominent field emitter cathode because of its high aspect ratio with a nanometer-scale diameter and high chemical inertness [1][2][3][4][5]. Continuous efforts on the CNT emitters has led to meaningful achievements in field-emission applications, such as visible lamps, and terahertz and x-ray sources [6][7][8][9]. In particular, the cold-cathode x-ray tube using CNT emitters has attracted a lot of attention since it has great advantages compared with conventional hot-cathode ones [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

View full text Add to dashboard Cite

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 × 10(-6) Torr and the possibility of field-emission x-ray tubes in a stand-alone device without an active pumping system.

show abstract