Validating the Goldstein-Wehner law for the stratified positive column of dc discharge in an undergraduate laboratory

In this paper we suggest a simple technique for validating the Goldstein-Wehner law for a stratified positive column of dc glow discharge while studying the properties of gas discharges in an undergraduate laboratory. To accomplish this a simple device with a pre-vacuum mechanical pump, dc source an...

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Bibliographic Details
Published in:European journal of physics 2012-11, Vol.33 (6), p.1537-1545
Main Authors: Lisovskiy, V A, Koval, V A, Artushenko, E P, Yegorenkov, V D
Format: Article
Language:English
Subjects:
College Science
Communication, education, history, and philosophy
Computer Uses in Education
Direct current
direct current glow discharge
Discharge tubes
Educational Technology
Exact sciences and technology
Gas discharges
Gas pressure
Gas tubes (electronic)
General physics
Law
low pressure
Monitors
Photography
Physics
Physics literature and publications
positive column
Positive columns
Science Instruction
Science Laboratories
Scientific Principles
Striations
Surveys and tutorial papers, resource letters
Undergraduate Study
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Summary:In this paper we suggest a simple technique for validating the Goldstein-Wehner law for a stratified positive column of dc glow discharge while studying the properties of gas discharges in an undergraduate laboratory. To accomplish this a simple device with a pre-vacuum mechanical pump, dc source and gas pressure gauge is required. Experiments may be performed in nitrogen or even in air. First you need to photograph the discharge tube with striations at different gas pressure values and then you need to determine the thickness of the first striation on a computer monitor.
ISSN:0143-0807
1361-6404
DOI:10.1088/0143-0807/33/6/1537