R&D Status of ATF2 IP Beam Size Monitor (Shintake Monitor)

TL;DR

The paper discusses the development and application of the Shintake monitor, a nanometer-scale electron beam size measurement device, focusing on its status at ATF2 and potential use in ILC.

Contribution

It reports on the current development status of the Shintake monitor, including key technical components and its application to measuring 37 nm beam size at ATF2.

Findings

Successful development of fringe phase monitoring and stabilization

Implementation of gamma detector and collimators

Potential for measuring 37 nm beam size at ATF2

Abstract

Shintake monitor is a nanometer-scale electron beam size monitor. It probes a electron beam by an interference fringe pattern formed by split laser beams. Minimum measurable beam size by this method is less than 1/10 of laser wavelength. In ATF2, Shintake monitor will be used for the IP beam size monitor to measure 37 nm (design) beam size. Development status of the Shintake monitor, including fringe phase monitoring and stabilization, gamma detector and collimators, is described. In addition, we discuss the beam size measurement by Shintake monitor in ILC.