Polarized positron source with a Compton multiple interaction point line

TL;DR

This paper proposes a novel Compton multiple Interaction Point line to enhance polarized positron production for future linear colliders, involving gamma ray simulation and positron capture and acceleration techniques.

Contribution

It introduces a new Compton multiple IP line design and simulation framework for improved polarized positron generation in linear colliders.

Findings

Simulated gamma ray production with the multiple IP line.

Designed a capture system using an adiabatic matching device.

Demonstrated potential for increased positron yield.

Abstract

Positron sources are critical components of the future linear collider projects. This is essentially due to the high luminosity required, orders of magnitude higher than existing ones. In addition, polarization of the positron beam rather expands the physics research potential of the machine. In this framework, the Compton sources for polarized positron production are taken into account where the high energy gamma rays are produced by the Compton scattering and subsequently converted into the polarized electron-positron pairs in a target-converter. The Compton multiple Interaction Point (IP) line is proposed as one of the solutions to increase the number of the positrons produced. The gamma ray production with the Compton multiple IP line is simulated and used for polarized positron generation. Later, a capture section based on an adiabatic matching device (AMD) followed by a pre-injector linac is simulated to capture and accelerate the positron beam.