X-ray source using carbon-nanotube field emitter with side-gate electrode. (15th May 2015)

• Record Type: Journal Article
• Authors: Okawaki, Shuhei; Abo, Satoshi; Wakaya, Fujio; Abe, Masayuki; Takai, Mikio
• Is Part Of: Japanese journal of applied physics. Volume 54:Number 6(2015:Jun.)Supplement 1
• Publication Date: 2015-05-15
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.06FF10
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: A carbon-nanotube (CNT) field emitter with side-gate electrodes, which are placed in-plane with the CNT emitters, is one of the most promising structures to realize a large-area X-ray charge neutralizer with a cost-effective and easy process. An X-ray source using the screen-printed CNT field emitter with side-gate electrodes is developed. The field-emission and X-ray properties are evaluated with anode voltages of 5 and 10 kV. It is shown that the emission current can be controlled by the side-gate voltage even with such high anode voltages as 5 and 10 kV. It is reported that the highest anode current is approximately 1 µA, which is high enough for an X-ray charge neutralizer. The X-ray radiation is successfully controlled by the pulsed side-gate voltage with subsecond length.