Electrical and Computer Engineering ETDs

Publication Date

Fall 12-17-2022

Abstract

The University of New Mexico is designing, building, and testing a multipactor testbed based on a horn-microstrip transmission line to characterize and investigate the multipactor effect for a range of vacuum pressures and power. A horn-shaped, 50 Ω Al microstrip line is positioned inside a six-way cross stainless-steel chamber that is vacuumed down to low ~10βˆ’7 torr. A 100 𝑀𝑀𝑀𝑀𝑀𝑀 sine signal is fed to a rf amplifier with a bandwidth of 250 βˆ’ 105 𝑀𝑀𝑀𝑀𝑀𝑀, that can reach 120π‘Šπ‘Š average (CW) power. Two multipacting detection methods, i.e., global, and local methods, are implemented for accurate multipaction detection. The former method consists of higher harmonics generation and power reflection via a spectrum analyzer and dual directional coupler, respectively. In contrast, a single channel electron multiplier or CEM consists of the latter. Additionally, numerical simulations via CST and SPARK3D has successfully validated the multipactor discharge and the secondary electron yield (SEY) of the horn-microstrip transmission line for different frequencies and material type.

Keywords

MULTIPACTOR, CST, SPARK3D

Document Type

Thesis

Language

English

Degree Name

Electrical Engineering

Level of Degree

Masters

Department Name

Electrical and Computer Engineering

First Committee Member (Chair)

Edl Schamiloglu

Second Committee Member

Salvador Portillo

Third Committee Member

Mark Gilmore

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