Off-axis cold-test probe for W-band cavities

Author

Theiss, A.J. ; Begum, S.R. ; Hargreaves, T.A.

Author_Institution

Electron. Devices Div., Litton Syst. Inc., San Carlos, CA, USA

fYear

2000

fDate

2-4 May 2000

Abstract

A pair of probes that can excite and detect oscillation-threatening modes in W-band gyroklystron cavities was built and tested. The probes, positioned inside 0.122-inch diameter beam tunnels that adjoin the cavity, either radiate or absorb RF from a 0.020" x 0.040" iris located off-axis on each probe tip. Each iris is joined to a WR-10 type flange on the opposite end of the probe by a rectangular waveguide that tapers in both transverse directions inside the probe body. This guide is filled with high-value dielectric powders that are layered along the taper to restrict RF propagation to the dominant rectangular TE/sub 10/ mode for frequencies between 75 GHz and 110 GHz.

Keywords

gyrotrons; klystrons; millimetre wave tubes; rectangular waveguides; 0.122 in; 75 to 110 GHz; RF propagation; W-band cavities; W-band gyroklystron cavities; WR-10 type flange; beam tunnels; high-value dielectric powders; iris; off-axis cold-test probe; oscillation-threatening modes; rectangular TE/sub 10/ mode; rectangular waveguide; taper; transverse directions; Dielectrics; Flanges; Iris; Klystrons; Powders; Probes; Radio frequency; Rectangular waveguides; Tellurium; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2000. Abstracts. International

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-5987-9

Type

conf

DOI

10.1109/OVE:EC.2000.847443

Filename

847443