Computation of time-dependent temperature distribution along a filament heatedin vacuoby electric pulses
作者:
Tomasz Durakiewicz,
Stanislaw Halas,
期刊:
Journal of Vacuum Science&Technology A: Vacuum, Surfaces, and Films
(AIP Available online 1998)
卷期:
Volume 16,
issue 1
页码: 194-199
ISSN:0734-2101
年代: 1998
DOI:10.1116/1.580968
出版商: American Vacuum Society
数据来源: AIP
摘要:
Numerical solution of the second-order partial differential equation describing the evolution of temperature of a tungsten filament in time allows the simulation of some effects that occur in the case of heating the filament by a series of pulses. Namely, the phenomena investigated are (1) phase shifts between heating current and filament temperature, (2) amplitude of temperature modulation due to variation of supply voltage and (3) the temperature dependence of the time constant of temperature changes. The method presented here may be used for any filament workingin vacuo. It may be applied in mass spectrometry, vacuum measurements, thin films deposition by hot filaments and other applications.
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