Photoinjector Generation of High-Charge Magnetized Beams for Electron-Cooling Applications

TL;DR

This paper demonstrates the generation of high-charge, 40 MeV electron beams with specific eigenemittance properties suitable for electron-cooling in future colliders, supported by experimental data and simulations.

Contribution

It presents a novel method for producing high-charge, magnetized electron beams with tailored eigenemittance partition for collider applications.

Findings

Achieved high-charge electron bunches up to 3.2 nC at 40 MeV.

Experimental results align well with numerical simulations.

Generated beams meet eigenemittance criteria for electron-cooling applications.

Abstract

Electron-cooling offers a relatively simple scheme to enable high-luminosity collisions in future electron-ion and hadron colliders. Contemplated TeV-energy hadron colliders require relativistic (sub 100 MeV) high-charge [${\cal O}(\mbox{nC})$] electron beams with a specific transverse eigenemittance partition. This paper discusses the generation of high-charge ($Q\le 3.2$~nC) 40 MeV electron bunches with eigenemittance partition consistent with requirements associated with electron-cooling option for future electron-ion colliders. The supporting experiment was performed at the FAST facility at FermiLab. The data are compared with numerical simulations and the results discussed in the context of beam requirement for future electron-ion colliders.