A Low Energy Beam Transport Design with high SCC for TAC Proton Accelerator

TL;DR

This paper presents a low energy beam transport design for the TAC proton accelerator, optimizing beam matching, emittance, and space charge compensation using TRACE 2D and TRAVEL codes, with a focus on high SCC and beam quality.

Contribution

The study introduces a LEBT design with high space charge compensation and detailed beam dynamics analysis for the TAC proton linac, incorporating beam aperture optimization.

Findings

Optimal SCC factors between 93.75% and 100% were identified.

Comparison of TRACE 2D and TRAVEL codes validated the design.

Beam aperture study improved beam brightness and reduced unwanted particles.

Abstract

In this study, a low energy beam transport (LEBT) channel for the proton linac section of the Turkic Accelerator Complex (TAC) has been designed by using TRACE 2D and TRAVEL codes. The LEBT channel is located between an ion source and a radio frequency quadrupole (RFQ) structure. The aims of the design studies are perfect matching between input and output beams with two solenoid magnets, small emittance growth and sufficient space for beam diagnostics. Total length of such LEBT channel is about 1.3 m. The current of H- ion beam from ion source is 80 mA. In the beam dynamical simulations, we have taken into account some space charge compensation (SCC) factors between %93.75 and %100. The results of both codes have been compared for the selected SCC factors. Additionally, beam aperture study for % 95 SCC factor has been done to discard unwanted particles and increase the beam brightness.