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Novel resonators for Smith-Purcell free electron lasers.

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Call No.	TA1693 .P63 1997
Author	Platt, Christopher L.
Title	Novel resonators for Smith-Purcell free electron lasers.
Date	1997
Abstract	A Smith-Purcell Free Electron Laser test-facility has been developed. The structure is used to conduct detailed explorations that novel resonator designs will have on tunability, start current and other performance criteria. Emphasis is on sources which operate at millimeter wavelengths and utilize moderate energy electron beams. The Smith-Purcell radiation is produced by passing a 3-15 kV, submillimeter diameter electron beam over a metal grating with a rectangular profile. Radiation is produced at 35-40 GHz, 75 GHz and 95-100 GHz using different gratings. Three resonator configurations have been investigated. Two are planar orotron designs with different quality factors. Starting currents as low as 1 to 10 mA have been observed in the 35-40 GHz range. A third configuration is a bare grating without an external feedback elements. Performance was equal or superior to the original planar orotron designs. Radiation from this structure is observed by looking for bound modes launched in the backward direction. Starting currents of 15 mA are observed and the wavelength is continuously tunable. This design is simpler and more robust and allows a better understanding of the operation of the device.
Description	1 online resource (ix, 95 leaves) : illustrations
Format	application/pdf
Advisor	Walsh, John E.
Subject	Free electron lasers -- Experiments. ; Resonators -- Experiments.
College	Dartmouth College -- Department of Physics and Astronomy.
Issuing Body	Dartmouth Dissertations are made available through the Dartmouth Digital Library.
Degree	Thesis (Ph.D)--Dartmouth College.
Copyright	In Copyright. This material is protected by copyright and/or related rights. You are free to use this material in any way that is permitted by copyright law that applies to your use. For other uses, you need to obtain permission from the rights-holder(s). http://rightsstatements.org/page/InC/1.0/
DOI	https://doi.org/10.1349/ddlp.2862

Title	platt1997 1
Full Text	Novel Resonators for Smith-Purcell Free Electron Lasers A Thesis Submitted to the Faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Physics by Christopher L. Piatt DARTMOUTH COLLEGE April 1997

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Novel resonators for Smith-Purcell free electron lasers.

Novel resonators for Smith-Purcell free electron lasers.