Determining phase-space properties of the IHEP RFQ output beam using the RMS beam widths from wire-scanners

TL;DR

This paper presents a method to determine the phase-space properties of an RFQ output beam using RMS beam widths from wire scanners, combining transfer matrix and least squares methods, validated by multi-particle simulations.

Contribution

The paper introduces a novel approach to extract transverse emittance and ellipse parameters from wire scanner data using transfer matrix and least squares, validated through simulations.

Findings

Simulation results show less than 7% difference between measured and simulated RMS beam sizes.

The method effectively determines beam phase-space parameters with acceptable accuracy.

Validation confirms the reliability of the approach for beam diagnostics.

Abstract

A beam line is built after the IHEP RFQ for halo study. To determine transverse emittance and ellipse parameters of the RFQ output beam, beam size data obtained from the first two of 14 wire scanners are employed. By using the transfer matrix method and the least square method, a set of linear equations were set up and solved. The solutions were then applied as initial beam parameters in multi-particle simulations to check the method of calculation. It is shown that difference between the simulated RMS beam size and the measured one at the measurement location is less than 7%, which is acceptable in our experiments.