Published 2016 | Version v1
Journal article Metadata-only

Emittance Effects on Gain in W -Band TWTs

Creators

  • 1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Description

We consider the main effects of beam emittance on W-band traveling-wave tube (TWT) performance and gain. Specifically, we consider a representative dielectric TWT structure with ~5 dB/cm of gain driven by a 5-A, 20-keV, sheet electron beam that is focused by a wiggler magnetic field. The normalized beam transverse emittance must be about 1 μm or lower to ensure that both the transport is stable and the gain is not degraded by the effective energy spread arising from the emittance. This emittance limit scales roughly inversely with frequency.

Availability note (English)

Available from http://www.osti.gov/pages/servlets/purl/1415390; http://www.osti.gov/pages/biblio/1415390; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period

Additional details

Identifiers

DOI
10.1109/TED.2016.2612583;

Publishing Information

Journal Title
IEEE Transactions on Electron Devices
Journal Volume
63
Journal Issue
11
Journal Page Range
p. 4493-4498
ISSN
0018-9383

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
49057937
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
BEAM EMITTANCE; CMS DETECTOR; DIELECTRIC MATERIALS; ELECTRON BEAMS; MAGNETIC FIELDS; TRAVELLING WAVE TUBES; WIGGLER MAGNETS
Descriptors DEC
BEAMS; ELECTRON TUBES; ELECTRONIC EQUIPMENT; EQUIPMENT; LEPTON BEAMS; MAGNETS; MATERIALS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; MICROWAVE TUBES; PARTICLE BEAMS; RADIATION DETECTORS

Optional Information

Contract/Grant/Project number
AC52-06NA25396
Funding organization
USDOE Laboratory Directed Research and Development (LDRD) Program (United States)
Secondary number(s)
LA-UR--17-24412; OSTIID--1415390