We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

Scandate dispenser cathode for 220 GHz 50W sheet beam travelling wave tube amplifier

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
Jinfeng Zhao ; Dept. of Electr. & Comput. Eng., Univ. of California-Davis (UCD), CA, USA ; Gamzina, D. ; Baig, A. ; Barnett, L.
more authors

Nanocomposite Sc2O3-added tungsten dispenser cathodes were tested in Cathode Life Test Vehicles (CLTV) with a Pierce gun configuration under CW mode. The emission performance for both dc and pulsed current density remained consistent. In CLTV #1, owing to perveance issue (there is 100 micron gap between focus electrode and cathode emission surface), 10 A/cm2 dc current density can be acquired at practical temperature of 1120°C Br for more than 2000 hours. In CLTV #2 with reduced FE gap, 45 A/cm2 dc current density is obtained.

Published in:

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Date of Conference:

2-7 Oct. 2011