Study of Beam Profile Measurement at Interaction Point in International Linear Collider

TL;DR

This paper presents a simulation study of a new beam profile monitor, the pair monitor, which measures electron-positron pair distributions to accurately determine beam sizes at the interaction point in the International Linear Collider.

Contribution

The paper introduces the pair monitor, a novel device for beam profile measurement using pair hit distributions, enhancing measurement accuracy at the collider.

Findings

Achieved measurement accuracies of 5.1%, 10.0%, and 4.0% for horizontal, vertical, and longitudinal beam sizes.

Demonstrated the effectiveness of the pair monitor in simulation for high-precision beam profiling.

Validated the potential of the pair monitor for real-time beam size monitoring in collider operations.

Abstract

At the international linear collider, measurement of the beam profile at the interaction point is a key issue to achieve high luminosity. We report a simulation study on a new beam profile monitor, called the pair monitor, which uses the hit distribution of the electron-positron pairs generated at the interaction point. We obtained measurement accuracies of 5.1%, 10.0%, and 4.0% for the horizontal, vertical, and longitudinal beam size, respectively, for 50 bunch crossings.