Induction Linear Accelerators with a High-T c Bulk Superconductor Lens (Supertrons)

High-Tc powder-pressed bulk superconductor lenses (Supertrons) were applied to induction linear accelerators. Conventional induction accelerators have solenoidal coils to focus and guide electron beams. The present accelerator which consisted of only one-stage accelerating gap, contrarily, had no coils but Bi-based superconductor lenses. The accelerator postaccelerated injected relativistic electron beams to ∿400 keV, ∿0.35 kA, and ∿10 ns of duration time. The results indicate that Supertrons can replace solenoidal coils in beam-handling devices.