Resolution of Longitudinal Profile Measures using Coherent Smith-Purcell Radiation with the Number of Gratings and the Number of Pulses Used

TL;DR

This paper investigates how the number of gratings and pulses affect the resolution and stability of measuring electron bunch profiles using Smith-Purcell radiation at SLAC.

Contribution

It introduces a method to improve longitudinal profile measurements by analyzing the effects of grating count and pulse number on resolution and stability.

Findings

Resolution improves with more gratings and pulses

Measurement stability varies with experimental parameters

Optimal configurations enhance profile measurement accuracy

Abstract

The E-203 collaboration is testing a device on FACET at SLAC to measure the longitudinal profile of electron bunches using Smith-Purcell radiation. At FACET the electron bunches have an energy of 20~GeV and a duration of a few hundred femtoseconds. Smith-Purcell radiation is emitted when a charged particle passes close to the surface of a metallic grating. We have studied the stability of the measurement from pulse to pulse and the resolution of the measure depending on the number of gratings used.