An adaptive masking method for beam halo measurement by a digital micro mirror device. (4th November 2021)

• Record Type: Journal Article
• Authors: Lin, Q.; Sun, Z.; Corbett, J.
• Is Part Of: Journal of instrumentation. Volume 16:Number 11(2021)
• Publication Date: 2021-11-04
• Subjects: Accelerator Applications -- Beam dynamics -- Beam Optics; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/16/11/T11005
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: In high intensity particle beams, irregularities in cathode emission, scattering effects, dark current and space charge forces can lead to a common phenomenon termed beam halo with associated emittance growth, beam loss and overall beam quality degradation. It is of fundamental interest and practical importance to precisely monitor such beam halo, which could offer valuable insights into the experimental strategy for the suppression of this undesired feature [1]. A Digital Micro mirror Device (DMD) is a computer-controlled micro-electrical-mechanical system that contains a compact array of physically independent reflective mirrors. Using a standard DMD, we come up with an adaptive masking method for halo measurement, which demonstrates superior robustness and efficiency comparing to the conventional approaches as confirmed by simulation and experimental results. Our development includes an integrated package of hardware, software and a graphic user interface (GUI) that is robust and portable and can be applied as a beam halo diagnostic for electron guns or radiating charged particle beams in general.