Formation and Acceleration of Uniformly-Filled Ellipsoidal Electron Bunches Obtained via Space-Charge-Driven Expansion from a Cesium-Telluride Photocathode

Abstract

We report the experimental generation, acceleration and characterization of a uniformly-filled electron bunch obtained via space-charge-driven expansion (often referred to as "blow-out regime") in an L-band (1.3-GHz) radiofrequency photoinjector. The beam is photoemitted from a Cesium-Telluride semiconductor photocathode using a short ($<200$ fs) ultraviolet laser pulse. The produced electron bunches are characterized with conventional diagnostics and the signatures of their ellipsoidal character is observed. We especially demonstrate the production of ellipsoidal bunches with charges up to $\sim 0.5$ nC corresponding to a $\sim 20$-fold increase compared to previous experiments with metallic photocathodes.

arXiv comment9, pages, 13 figures

References in corpus (6)

• The Superconducting TESLA Cavities
• Compression of sub-relativistic space-charge-dominated electron bunches for single-shot femtosecond electron diffraction
• First observation of the exchange of transverse and longitudinal emittances
• Upgrades of beam diagnostics in support of emittance-exchange experiments at the Fermilab A0 photoinjector
• Comment on "How to Realize Uniform Three-Dimensional Ellipsoidal Electron Bunches"
• Synchronization and Characterization of an Ultra-Short Laser for Photoemission and Electron-Beam Diagnostics Studies at a Radio Frequency Photoinjector

Cited by in corpus (6)

• Tailored electron bunches with smooth current profiles for enhanced transformer ratios in beam-driven acceleration
• Bunch Shaping in Electron Linear Accelerators
• Femtosecond response time measurements of a Cs2Te photocathode
• Formation of Temporally Shaped Electron Bunches for Beam-Driven Collinear Wakefield Accelerators
• Observation of Two-photon Photoemission from Cesium Telluride Photocathodes Excited by a Near-infrared Laser
• Effects of Laser Pulse Heating of Copper Photocathodes on High-brightness Electron Beam Production at Blowout Regime