Effect of anode geometry on electronic current inside a low- vacuum chamber

Date

3-2002

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Demetrio A Yco, Jr.

Abstract

A vacuum system using stainless steel type 304 was designed and constructed for the study of the different configurations of anode terminal Preparing the chamber for low vacuum ambiance was done and the stabilization hour of the chamber after evacuation was obtained with a value of 6 hours. The pressure inside the chamber was in the range of 10-- Torr. Tungsten wires and stainless steel (type 304) plates were used for constructing different anode terminals. Anode configurations of square, arc, and triangle wires, and circular and square plates were tested and data observed were recorded. Graphs of the obtained data were also plotted. Varying the supply voltage of the filament beyond 10 volts showed no effect to the current inside the vacuum chamber. This was due to the filament reaching its saturation point and emitting the maximum number of electrons. For the anode terminal, a range of 1 KV to 10 KV was used as supply voltage. All the samples showed a linear relationship between the supply voltage and current. The effect of different configuration of anode terminal was then explained by the formula of charge density. The triangular-shaped wire, and the square plate showed the highest electron transport based on the results obtained.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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