A Spatial-Resolved Proton Energy Spectrometer Based on a Scintillation-Fiber Cube

TL;DR

This paper presents a novel scintillation-fiber cube spectrometer for online, spatially-resolved measurement of complex proton beams with broad energy spread, demonstrating high accuracy and potential for real-time diagnostics.

Contribution

It introduces a new scintillation-fiber cube spectrometer design and validates its effectiveness for online proton beam energy and spatial distribution measurement.

Findings

Energy measurement range of 6-93 MeV with 0.6% uncertainty at 80 MeV

Pixel size of 0.5 mm for beam profile reconstruction

Successful measurement of complex proton beams using a custom energy degrader

Abstract

Advanced particle acceleration methods have produced high-peak-current ion beams with broad energy spread and complex spatial distribution. There is an urgent need to develop online spatial-resolved energy spectrometers for high-energy pulsed ions. This paper introduces a novel spectrometer based on a scintillation-fiber cube for online diagnosis of proton beams with broadband energy spread and complex spatial distribution. We present its working principles, experimental setup, and comprehensive calibration using monoenergetic and spatially uniform proton beams generated by a synchrotron accelerator. Calibration results confirm an energy measurement range of 6-93 MeV, a relative energy uncertainty of 0.6% at 80 MeV, and a pixel size of 0.5 mm for beam profile reconstruction. By exploiting a custom-designed energy degrader, we generated a complex proton beam and measured it with the scintillation-fiber cube spectrometer (SFICS). The results demonstrate the spectrometer's potential for online measurement of the energy spectrum and spatial distribution of complex proton beams.