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Note: Simulation and test of a strip source electron gun.

Munawar Iqbal¹, G U Islam¹, I Misbah¹

¹Centre for High Energy Physics, University of the Punjab, Lahore 45590, Pakistan.

The Review of Scientific Instruments

|July 3, 2014

Summary

This study details a focused electron beam gun, achieving a 3.04 mm diameter and high power density. The simple, inexpensive design is ideal for advanced accelerators technology.

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Area of Science:

Physics
Engineering
Accelerator Technology

Background:

Electron beam guns are critical components in various scientific and technological applications, including particle accelerators.
Optimizing electron beam characteristics such as focus, emission current, and power density is essential for enhancing performance.

Purpose of the Study:

To simulate and experimentally validate an indirectly heated strip source electron beam gun assembly.
To evaluate the beam's focusing capabilities, emission characteristics, and overall performance.

Main Methods:

Utilized the Stanford Linear Accelerator Center (SLAC) electron beam trajectory program for simulations.
Conducted experimental tests to measure emission current, emission density, and beam diameter.
Compared simulation results with experimental data for validation.

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Main Results:

Achieved a sharply focused beam with a 3.04 mm diameter in the post-anode region.
Measured an emission current of 1.12 A and an emission density of 1.15 A/cm², corresponding to a power density of 11.5 kW/cm² at 10 kV acceleration potential.
Simulated results were found to be in agreement with experimental findings.

Conclusions:

The indirectly heated strip source electron beam gun is simple, inexpensive, and effective, operating without biasing or external fields.
The gun demonstrates high power and is suitable for accelerators technology due to its high emission and low emittance parameters.