Two-screen single-shot electron spectrometer for laser wakefield accelerated electron beams

Area of Science:

• Plasma Physics
• Particle Accelerators

Background:

• Electron beams from laser wakefield acceleration (LWFA) exhibit significant angular deviation from the system axis.
• This deviation complicates accurate energy measurements using conventional spectrometers, particularly at high energies.

Purpose of the Study:

• To introduce and evaluate a two-screen single-shot electron spectrometer designed to mitigate errors caused by beam deviation.
• To improve the accuracy of energy measurements for LWFA electron beams.

Main Methods:

• Development of a two-screen single-shot electron spectrometer.
• Incorporation of design features to account for varying angles of electron beam entry.
• Comparison of performance with a one-screen spectrometer under similar conditions (magnetic field, size, angular acceptance).

Main Results:

• The two-screen spectrometer accurately accounts for variations in the angle of entry.
• Significant enhancement in measurement accuracy for narrow electron beams was achieved.
• The new design offers superior accuracy compared to a one-screen spectrometer.

Conclusions:

• The developed two-screen spectrometer is a significant advancement for accurate energy characterization of LWFA electron beams.
• This instrument addresses a key challenge in high-energy particle beam diagnostics.
• The design provides a more reliable method for studying LWFA phenomena.