Electron acceleration for X-ray production using paired pyroelectric crystals

Jeffrey Geuther, Yaron Danon, Frank Saglime, Bryndol Sones

Research output: Contribution to conferencePaper

9 Scopus citations

Abstract

The exposure of pyroelectric crystals to a heating cycle in near-vacuum conditions has been shown to be a viable method of producing x-rays. The z-negative face of the crystal forms a positive charge as the crystal heats, and a negative charge as it cools. The opposite is true for the z-positive face. Literature has shown that this charge is great enough to accelerate electrons to energies of up to 170 keV. This phenomenon can be used to create small X-ray, electron and charged particle sources. X-rays are produced when the electrons in the ambient gas are accelerated by this field toward a target (when the exposed face of the crystal is negatively charged) or toward the crystal itself (when the exposed face is positively charged). In this experiment, z-cut lithium tantalate crystals with 5 mm × 5 mm surface area and thicknesses of 1, 2, 4, and 10 mm were placed in a vacuum and subjected to a thermal cycle. A 10 × 10 × 0.5 mm crystal was also tested. The counts per thermal cycle and maximum energy of the x-ray spectra were shown to increase with crystal thickness. In addition, a system was explored in which two 10 mm crystals were arranged in series. This system was shown to double the maximum x-ray energy. Additional crystal thicknesses and system geometries that may further increase maximum x-ray energy and yield are currently under investigation.

Original languageEnglish (US)
Pages591-595
Number of pages5
StatePublished - Dec 1 2003
EventSixth International Meeting on Nuclear Applications of Accelerator Technology (AccApp'03): Accelerator Applications in a Nuclear Renaissance - San Diego, CA, United States
Duration: Jun 1 2003Jun 5 2003

Other

OtherSixth International Meeting on Nuclear Applications of Accelerator Technology (AccApp'03): Accelerator Applications in a Nuclear Renaissance
CountryUnited States
CitySan Diego, CA
Period6/1/036/5/03

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Geuther, J., Danon, Y., Saglime, F., & Sones, B. (2003). Electron acceleration for X-ray production using paired pyroelectric crystals. 591-595. Paper presented at Sixth International Meeting on Nuclear Applications of Accelerator Technology (AccApp'03): Accelerator Applications in a Nuclear Renaissance, San Diego, CA, United States.