NDLI: Method for Approximating Electron Beam Currents Accelerated by a Piezoelectric Transformer

Content Provider	IEEE Xplore Digital Library
Author	VanGordon, J.A. Kovaleski, S.D. Norgard, P. Jae Wan Kwon Dale, G.E.
Copyright Year	1973
Abstract	Piezoelectric transformers (PTs) are currently used to accelerate charged-particle beams for various applications. Beam interactions at the output of the PT can be treated as a parallel RC electrical load. The impedance of the load can affect the output voltage because of the small, finite amount of charge available in the PT; therefore, high-impedance diagnostics are required to characterize the PT. A thermionic electron emitter was used to provide a controllable beam current for testing the effects of electrical loading on the PT. The electron beam was operated in vacuum at pressures of 10^-6-10^-5 torr. The input mechanical quality factor and the effective output electrical quality factor were used to approximate the electron beam current on the basis on the PTs equivalent electromechanical circuit. The output voltage needed for the output electrical quality factor was measured via bremsstrahlung interactions at the output electrode of the PT. Optical techniques for finding internal operating parameters such as electric field and stress were used to determine the load with curve fitting as a comparison with the quality factor diagnostic. Approximating the electron beam current with such methods will help determining the output power that such PTs can generate for future applications.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	3579
Ending Page	3584
Page Count	6
File Size	1925448
File Format	PDF
ISSN	00933813
Volume Number	42
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Q-factor Capacitance Electron beams Voltage measurement Optical variables measurement Q factor piezoelectric devices \(Q\) factor
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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