A numerical approach to designing a versatile pepper-pot mask for emittance measurement

Oznur Apsimon (Lead), Barney Williamson, Guoxing Xia

Research output: Contribution to journalArticlepeer-review

Abstract

The pepper-pot method is a popular emittance measurement technique for high intensity beams at low energy such as those generated by photo-injectors. In this paper, the beam dynamics in the space charge dominated regime and analytical design criteria for a mask-based emittance measurement (pepper-pot method) are revisited. A tracking code developed to test the performance of a pepper-pot setup is introduced. Examples of such testing are presented with particle distributions that were generated using PARMELA under different focusing conditions. These distributions were numerically tested against a series of mask geometries suggested by analytical criteria. The resulting fine-tuned geometries and beam dynamics features observed are presented.
Original languageEnglish
Article number162485
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Early online date1 Aug 2019
DOIs
Publication statusPublished - 1 Nov 2019

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