A conventional positron source for International Linear Collider

TL;DR

This paper proposes a conventional positron source for the International Linear Collider using a 300 Hz electron linac and a rotating tungsten target to optimize positron production and thermal management.

Contribution

It introduces a novel design combining a 300 Hz electron linac with a rotating tungsten target to improve positron yield and thermal load handling for ILC.

Findings

Optimized parameters increase positron capture efficiency.

The rotating tungsten disk effectively manages target thermal load.

The system can produce the required bunch train for ILC.

Abstract

A possible solution to realize a conventional positron source driven by a several-GeV electron beam for the International Linear Collider is proposed. A 300 Hz electron linac is employed to create positrons with stretching pulse length in order to cure target thermal load. ILC requires about 2600 bunches in a train which pulse length is 1 ms. Each pulse of the 300 Hz linac creates about 130 bunches, then 2600 bunches are created in 63 ms. Optimized parameters such as drive beam energy, beam size, and target thickness, are discussed assuming a L-band capture system to maximize the capture efficiency and to mitigate the target thermal load. A slow rotating tungsten disk is employed as positron generation target.