Spatial Control of Photoemitted Electron Beams using a Micro-Lens-Array Transverse-Shaping Technique

Abstract

A common issue encountered in photoemission electron sources used in electron accelerators is the transverse inhomogeneity of the laser distribution resulting from the laser-amplification process and often use of frequency up conversion in nonlinear crystals. A inhomogeneous laser distribution on the photocathode produces charged beams with lower beam quality. In this paper, we explore the possible use of microlens arrays (fly-eye light condensers) to dramatically improve the transverse uniformity of the drive laser pulse on UV photocathodes. We also demonstrate the use of such microlens arrays to generate transversely-modulated electron beams and present a possible application to diagnose the properties of a magnetized beam.

arXiv admin note: text overlap with arXiv:1609.01661

References in corpus (6)

• Intense Super-radiant X-rays from a Compact Source using a Nanocathode Array and Emittance Exchange
• Tunable subpicosecond electron bunch train generation using a transverse-to-longitudinal phase space exchange technique
• Generation of Relativistic Electron Bunches with Arbitrary Current Distribution via Transverse-to-Longitudinal Phase Space Exchange
• Generation of angular-momentum-dominated electron beams from a photoinjector
• Fundamental Photoemission Brightness Limit from Disorder Induced Heating
• Simulation of a cascaded longitudinal space charge amplifier for broadband radiation production using a superconducting linac

Cited by in corpus (9)

• Single-Shot Characterization of High Transformer Ratio Wakefields in Nonlinear Plasma Acceleration
• Bunch Shaping in Electron Linear Accelerators
• Overestimation of thermal emittance in solenoid scans due to coupled transverse motion
• Experimental demonstration of the correction of coupled transverse dynamics aberration in an rf photoinjector
• Four-Dimensional Phase-Space Reconstruction of Flat and Magnetized Beams Using Neural Networks and Differentiable Simulations
• Rapid thermal emittance and quantum efficiency mapping of a cesium telluride cathode in an rf photoinjector using multiple laser beamlets
• Tailoring of an Electron-Bunch Current Distribution via Space-to-Time Mapping of a Transversely-Shaped Photoemission-Laser Pulse
• Single-shot Transverse Wakefield Mapping with a Hollow Electron Beam
• Experimental demonstration of cascaded round-to-flat and flat-to-round beam transformations