Excitation of plasma wakefields by intense ultra‐relativistic proton beam. Issue 6 (11th March 2021)

• Record Type: Journal Article
• Authors: Karmakar, Mithun; Patel, Bhavesh; Chakrabarti, Nikhil; Sengupta, Sudip
• Is Part Of: Contributions to plasma physics. Volume 61:Issue 6(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-11
• Subjects: charge particle acceleration -- nonlinear plasma wave -- plasma wake field -- proton beam; Plasma (Ionized gases) -- Periodicals; Electronic journals; 530.44
• DOI: 10.1002/ctpp.202000215
• Languages: English
• ISSNs: 0863-1042

Abstract

Abstract: We report here an exact analytical travelling wave solution for a non‐linear electron plasma wave excited by an intense ultra‐relativistic proton beam. It demonstrates the underlying physics of longitudinal electric field characteristics of the excited wake wave formed behind the drive beam. The results are further supplemented by a fully relativistic particle‐in‐cell code OSIRIS in two‐dimensional geometry. The investigation is further extended by providing an analytical description of the wake wave excited by an equi‐spaced train of small proton bunches with the inclusion of the non‐relativistic plasma ion dynamics. Our results show that the amplitude of the wake field does not grow indefinitely with the increase in the number of proton bunches. On the contrary, it saturates to a definitive limit.