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Infrared imaging diagnostics for intense pulsed electron beam.

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A new infrared imaging method diagnoses intense pulsed electron beams (IPEB) using tungsten films. This technique analyzes electron source uniformity, enhancing diode system efficiency and stability assessments.

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Area of Science:

  • Plasma Physics
  • Electron Beam Technology
  • Diagnostic Methods

Background:

  • Intense pulsed electron beams (IPEB) are crucial for various applications.
  • Accurate diagnostics are essential for optimizing IPED performance.
  • Current methods may lack sufficient spatial resolution or uniformity analysis.

Purpose of the Study:

  • To develop a novel two-dimensional calorimetric diagnostic method for IPED.
  • To evaluate the emitting uniformity of electron sources in diode systems.
  • To enhance the efficiency and stability assessment of IPED systems.

Main Methods:

  • Utilized a 100-μm-thick tungsten film as an infrared heat sink for IPED.
  • Employed two-dimensional axisymmetric finite element method heat transfer simulations.
  • Integrated Monte Carlo calculations for error estimation and method optimization.

Main Results:

  • Successfully measured the cross-sectional energy density distribution of IPED.
  • Achieved an energy sensitivity of 0.1 J/cm(2).
  • Obtained a spatial resolution of 1 mm for diagnostics.

Conclusions:

  • The developed infrared imaging method provides effective two-dimensional calorimetric diagnostics for IPED.
  • The technique allows for detailed analysis of electron source uniformity, crucial for diode system evaluation.
  • The method demonstrates functional extensibility and includes considerations for irradiation protection.