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Title: Broad-band beam buncher

Abstract

A broad-band beam buncher is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in itsmore » characteristic impedance to afford a broad-band response and the device as a whole designed to effect broad-band beam coupling, so as to minimize variations of the output across the response band.« less

Inventors:
 [1];  [2];  [3];  [4]
  1. Walnut Creek, CA
  2. Berkeley, CA
  3. Martinez, CA
  4. Orinda, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
865752
Patent Number(s):
4567452
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
broad-band; beam; buncher; disclosed; comprising; evacuated; housing; electron; gun; therein; producing; cavity; entrance; exit; openings; directed; grids; source; providing; positive; dc; voltage; drift; tube; travels; passing; gaps; provided; modulator; supplying; ultrahigh; frequency; modulating; signal; velocity; modulation; electrons; space; modulated; bunched; discharge; grid; discharged; accelerator; arranged; constitute; extension; coaxial; transmission; line; employed; deliver; extended; terminated; characteristic; impedance; afford; response; device; designed; effect; coupling; minimize; variations; output; band; coaxial transmission; transmission line; electron beam; dc voltage; electron gun; drift tube; characteristic impedance; signal source; bunched electron; broad-band beam; modulated electron; beam buncher; beam travels; response band; frequency modulating; drift space; beam coupling; /315/313/

Citation Formats

Goldberg, David A, Flood, William S, Arthur, Allan A, and Voelker, Ferdinand. Broad-band beam buncher. United States: N. p., 1986. Web.
Goldberg, David A, Flood, William S, Arthur, Allan A, & Voelker, Ferdinand. Broad-band beam buncher. United States.
Goldberg, David A, Flood, William S, Arthur, Allan A, and Voelker, Ferdinand. Wed . "Broad-band beam buncher". United States. https://www.osti.gov/servlets/purl/865752.
@article{osti_865752,
title = {Broad-band beam buncher},
author = {Goldberg, David A and Flood, William S and Arthur, Allan A and Voelker, Ferdinand},
abstractNote = {A broad-band beam buncher is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in its characteristic impedance to afford a broad-band response and the device as a whole designed to effect broad-band beam coupling, so as to minimize variations of the output across the response band.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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