Longitudinal Jitter Analysis of a Linear Accelerator Electron Gun

• Main Authors: MingShan Liu, Munawar Iqbal
• Format: Article
• Language: English
• Published: MDPI AG 2016-11-01
• Series: Applied Sciences
• Subjects: gun trigger timing; longitudinal jitter; beam performance; PARMELA
• Online Access: http://www.mdpi.com/2076-3417/6/11/350

We present measurements and analysis of the longitudinal timing jitter of a Beijing Electron Positron Collider (BEPCII) linear accelerator electron gun. We simulated the longitudinal jitter effect of the gun using PARMELA to evaluate beam performance, including: beam profile, average energy, energy spread, and XY emittances. The maximum percentage difference of the beam parameters is calculated to be 100%, 13.27%, 42.24% and 65.01%, 86.81%, respectively. Due to this, the bunching efficiency is reduced to 54%. However, the longitudinal phase difference of the reference particle was 9.89°. The simulation results are in agreement with tests and are helpful to optimize the beam parameters by tuning the trigger timing of the gun during the bunching process.