A Numerical Approach to Designing a Versatile Pepper-pot Mask for Emittance Measurement
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.
Keywords
Cite
@article{arxiv.1907.13515,
title = {A Numerical Approach to Designing a Versatile Pepper-pot Mask for Emittance Measurement},
author = {Oznur Apsimon and Barney Williamson and Guoxing Xia},
journal= {arXiv preprint arXiv:1907.13515},
year = {2019}
}