Reducing emittance of a H- beam in a solenoid-based low-energy beam transport through numerical modeling

Javier Von Stecher, Seth A. Veitzer, Brian T. Schwartz, David L. Bruhwiler, Baoxi Han, Martin P. Stockli

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A solenoid-based low-energy beam transport (LEBT) subsystem is under development for the H- linac front end of the Spallation Neutron Source. The LEBT design includes MHz-frequency chopping of a partially neutralized H- beam that can potentially lead to beam instabilities. We report results of numerical modeling using the parallel VSim [1] framework for 3D electrostatic particle-in-cell (PIC) to simulate H- beam dynamics in the LEBT, over multiple chopping events. We detail how the addition of a positively biased potential barrier near the entrance of the chopper can improve LEBT performance by eliminating chopper-induced emittance increases over many chopping events.

Original languageEnglish
Title of host publicationIPAC 2013
Subtitle of host publicationProceedings of the 4th International Particle Accelerator Conference
Pages2000-2002
Number of pages3
StatePublished - 2013
Event4th International Particle Accelerator Conference, IPAC 2013 - Shanghai, China
Duration: May 12 2013May 17 2013

Publication series

NameIPAC 2013: Proceedings of the 4th International Particle Accelerator Conference

Conference

Conference4th International Particle Accelerator Conference, IPAC 2013
Country/TerritoryChina
CityShanghai
Period05/12/1305/17/13

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