Calibration of two compact permanent magnet spectrometers for high current electron linear induction accelerators

Area of Science:

• Nuclear Physics and Instrumentation
• High-Energy Particle Measurement

Background:

• Accurate measurement of electron beam energy is critical for hydrodynamic testing.
• Existing methods may have limitations in range or precision for high-energy electrons.

Purpose of the Study:

• To develop and calibrate compact, permanent magnet electron spectrometers.
• To extend the measurable electron kinetic energy range for the Dual Axis Radiographic Hydrodynamic Test facility.

Main Methods:

• Construction of two compact permanent magnet electron spectrometers.
• Calibration using H- and OH- anions at Special Technologies Laboratory.
• Mounting on a custom drift tube for adjustable electron path length.

Main Results:

• Spectrometer 1 measures 2.8 MeV-4.1 MeV; Spectrometer 2 measures 14.1 MeV-21.1 MeV.
• Overall measurement uncertainty achieved is 0.32%.
• Adjustable magnet assemblies enhance the upper limit of measurable energy.

Conclusions:

• The developed spectrometers provide precise, extended-range electron kinetic energy measurements.
• These instruments are suitable for critical applications at the Dual Axis Radiographic Hydrodynamic Test facility.
• The design allows for future enhancements in measurable energy ranges.