RF cavity design for a low-cost 1 MeV proton source

D Soriano Guillen, Rebecca Seviour, S Hunt

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


In this paper we present the design for a low-cost RF cavity capable of accelerating protons from 100 keV to 1 MeV. The system is designed to meet the specifications from the proposed Alceli LTD medical proton therapy linac, to deliver a 1 nA proton beam current with a 1 kHz repetition rate.
We present a design of an RF normal conducting (NC) re-entrant Cu cavity operating at 40MHz consisting of a coupled two cavity system, both driven by a single Marx generator. The choice of such a low operating frequency for the cavity system enables us to use a relatively low-cost cost Marx Generator as the RF source. Marx generators work in a similar fashion to a Cockcroft-Walton accelerator (without the expensive components), creating a high-voltage pulse by charging a number of capacitors relatively slowly in parallel, then rapidly discharging in series, via spark gaps. Marx generators can deliver 2.5GW, 1 ns pulses, with rise times of 200 ps, and (relatively) low jitter.
Original languageEnglish
Title of host publicationProceedings of the 8th International Particle Accelerator Conference (IPAC '17)
PublisherJoint Accelerator Conferences Website (JACoW)
Number of pages3
ISBN (Print)9783954501823
Publication statusPublished - 14 May 2017
Event8th International Particle Accelerator Conference - Copenhagen, Denmark
Duration: 14 May 201719 May 2017
Conference number: 8
https://ipac17.org/ (Link to Conference Website )


Conference8th International Particle Accelerator Conference
Abbreviated titleIPAC'17
Internet address


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