Speaker
Description
Achieving strong focusing of MeV electron beams is a critical requirement for advanced beam applications such as compact laboratory X-ray sources, dielectric laser accelerators, and ultrafast electron diffraction (UED). To address these and similar relativistic electron focusing requirements, a compact radially magnetized permanent magnetic solenoid (PMS) has been designed, fabricated, and tested. The solenoid provides a compact and inexpensive solution for delivering high axial magnetic fields (1 Tesla) to focus MeV electron beams. Field characterization of the solenoid demonstrates excellent agreement with analytical models, validating the PMS design. The electron beam test employs a high-brightness photoinjector to study the focusing properties of the PMS. The results show a significant reduction in beam size with small spherical aberrations. Using the measured results, two application cases are evaluated: angular magnification in UED setups and strong focusing for Compton scattering or other microfocus uses.
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