Characterization of gyrating electron beams with a pinhole analyzer

Author

McAdoo, J.H. ; Kinkead, A. ; Sucy, M. ; Singh, A. ; Naiman, M.

Author_Institution

Mission Research Corp., Newington, VA, USA

fYear

1991

fDate

8-11 Dec. 1991

Firstpage

407

Lastpage

410

Abstract

An instrument for characterizing gyrating electron beams has been built and tested on an annular gyrating beam. Measurements of Larmor radius, axial period, guiding center locations, axial velocity spread, azimuthal velocity spread, and energy spread, all as functions of radial position within a beam, are reported. The instrument consists of a stationary pinhole foil, a rotable slit foil, and a translatable phosphor screen for detecting electrons that pass through the slit and pinhole. The beam used for prototype tests had a current of 0.6 A, an energy of 16.5 kV, a Larmor radius of 3 mm, and an axial period of 35 mm. The beam diameter was nominally 3 cm, and the annular width was 2 mm.<>

Keywords

electron beams; gyrotrons; particle beam diagnostics; 0.6 A; 16.5 kV; 3 to 30 mm; 35 mm; Larmor radius; annular gyrating beam; annular width; axial period; axial velocity spread; azimuthal velocity spread; beam diameter; current; energy; energy spread; functions of radial position; guiding center locations; gyrating electron beams characterization; pinhole analyzer; rotable slit foil; stationary pinhole foil; translatable phosphor screen; Electromagnetic heating; Electron beams; Extraterrestrial measurements; Instruments; Klystrons; Microwave devices; Phosphors; Position measurement; Prototypes; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices Meeting, 1991. IEDM '91. Technical Digest., International

Conference_Location

Washington, DC, USA

ISSN

0163-1918

Print_ISBN

0-7803-0243-5

Type

conf

DOI

10.1109/IEDM.1991.235368

Filename

235368