A unique electric discharge-excited solid state x-ray laser
Khan, Atanu
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https://hdl.handle.net/2142/42171
Description
Title
A unique electric discharge-excited solid state x-ray laser
Author(s)
Khan, Atanu
Issue Date
2013-02-03T19:18:15Z
Director of Research (if dissertation) or Advisor (if thesis)
Miley, George H.
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Anomalous x-ray emission
Glow Discharge
Pashchen curve
Abstract
A high-current discharge apparatus with a unique pulsed power supply was successfully constructed to demonstrate intense “anomalous” (exceeding direct charged-particle Bremsstrahlung) x-ray emission in the 1-2 keV range. Anomalous x-ray emission is attributed to ion implantation rather than normal electron Bremsstrahlung x-ray emission. A striking characteristic is that the x-ray energy can be several times the energy of the bombarding ions, suggesting a strong nonlinear mechanism. Such emission was observed during a glow discharge operation in the pressure range 0.1-5.0 torr with a cathode/anode separation of ~4.0 mm. This discharge operates at a voltage of 1-2 kV with a high-pulsed current up to 2 A. The current pulses have “square” time shape with 0.2-2.0 ms duration and a rise time of 0.1 microsecond.
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