Accession Number : ADA615347


Title :   Fundamental Materials Studies for Advanced High Power Microwave and Terahertz Vacuum Electronic Radiation Sources


Descriptive Note : Final rept. 1 Oct 2011-30 Sep 2014


Corporate Author : WISCONSIN UNIV-MADISON BOARD OF REGENTS/RESEARCH SPONSORED PROGRAMS


Personal Author(s) : Booske, John H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a615347.pdf


Report Date : 10 Dec 2014


Pagination or Media Count : 19


Abstract : The results of research sponsored by this grant address two fundamental questions relevant to the advancement of THz-regime device technology (0.1-3 THz). First, they establish a detailed, comprehensive fundamental understanding, of THz-regime conductivity, including the effects of materials imperfections (impurities, defects, surface roughness) in conductive materials (including metals, semiconductors, and graphene). This includes providing accurate predictive theoretical models, robustly validated by experimental measurements. Second, they establish a fundamental understanding of low-emission-barrier scandate cathodes and identify related, alternative cathode materials systems for advanced vacuum electronic cathodes for high power THz-regime sources.


Descriptors :   *CONDUCTIVITY , CATHODES , DEFECTS(MATERIALS) , SUBMILLIMETER WAVES , SURFACE ROUGHNESS


Subject Categories : Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE