Heat Load and Stress Studies for an Design of the Photon Collimator for the ILC Positron Source

TL;DR

This paper investigates the thermal load and stress issues in designing a photon collimator for the ILC positron source, proposing solutions to manage heat dissipation caused by intense photon beams.

Contribution

It provides an analysis of heat load and stress in the photon collimator, offering new design solutions to improve thermal management for the ILC positron source.

Findings

Thermal load in the collimator is significant due to high photon beam intensity.

Design solutions can effectively reduce heat dissipation and stress.

Enhanced collimator design improves positron polarization and system safety.

Abstract

The ILC baseline design for the positron source is based on radiation from a helical undulator to produce positrons in a thin target. Since the photon beam created in the helical undulator is circularly polarized, the generated positron beam is longitudinally polarized. Using a photon collimator upstream the positron target the positron polarization can be enhanced. However, the photon beam intensity yields a huge thermal load in the collimator material. In this paper the thermal load and heat dissipation in the photon collimator is discussed and design solutions are suggested.