Longitudinal jitter analysis of linear accelerator electron gun

TL;DR

This paper investigates the longitudinal timing jitter of the BEPCII linear accelerator's electron gun through measurements and simulations, revealing its impact on beam quality and bunching efficiency.

Contribution

It provides a combined measurement and simulation analysis of jitter effects, aiding in optimizing beam parameters by tuning trigger timing.

Findings

Maximum beam parameter differences up to 100% observed.

Bunching efficiency reduced to 54% due to jitter effects.

Simulation results agree with experimental measurements.

Abstract

We present measurement and analyses of longitudinal timing jitter of Beijing Electron Positron Collider (BEPCII) linear accelerator electron gun. We simulated longitudinal jitter effect of the gun using PARMELA about beam performance including beam profile, average energy, energy spread, longitudinal phase of reference particle and XY emittance. The maximum percentage difference of the beam parameters are calculated to be; 100%, 13.27%, 42.24%, 7.79% and 65.01%, 86.81%, respectively due to which the bunching efficiency is reduced to 54%. The simulation results are in agreement with test and are helpful to optimize the beam parameters by tuning the trigger timing of the gun during the bunching process.