Shintake Monitor in ATF2: Performance Evaluation

TL;DR

This paper evaluates the performance of the Shintake monitor at ATF2, demonstrating accurate beam size measurement with systematic errors under 30%, based on beam tests and error analysis.

Contribution

It provides a detailed performance evaluation of the Shintake monitor, including error sources and systematic error estimation, for measuring nanometer-scale beam sizes.

Findings

Systematic error less than 30% for 1-minute measurements

Successful measurement of laser interference fringe pattern

Beam size measurement accuracy at 37 nm

Abstract

The beam test for the Shintake monitor succeeded in measuring signal modulation with the laser interference fringe pattern in November 2009. We have studied the error sources, and evaluated the systematic error to be less than 30% for 1 minute measurements. This paper centers on the evaluation of the Shintake monitor performance through analyzing beam tests deta. Most systematic error sources are well understood, enabling accurate measurement of the beam size when it reaches 37 nm.