Ultra-low intensity proton beams for radiation response related experiments at the U-120M cyclotron

0501212 - ÚJF 2019 RIV CZ eng C - Conference Paper (international conference)
Matlocha, Tomáš - Křížek, Filip
Ultra-low intensity proton beams for radiation response related experiments at the U-120M cyclotron.
Acta Polytechnica CTU Proceedings. Vol. 14. Praha: CTU Prague, 2018, s. 21-26. ISBN 978-80-01-06426-9. ISSN 2336-5382.
[ŠIMÁNĚ 2017. Praha (CZ), 06.11.2018-07.11.2018]
R&D Projects: GA MŠMT LM2015056; GA MŠMT LM2015058
Institutional support: RVO:61389005
Keywords : ultra-low intensity proton flux * penning ion source * negative hydrogen yield resonance * cyclotron irraditation facility * radiation hardness tests
OECD category: Nuclear physics

The U-120M cyclotron at the Nuclear Physics Institute (NPI) of the Czech Academy of Sciences in Rez is used for radiation hardness tests of electronics for high-energy physics experiments. These tests are usually carried out with proton fluxes of the order of 105–109 proton cm-2 s -1. Some tests done for the upgrade of the Inner Tracking System of the ALICE experiment at CERN, however, required proton beam intensities several orders of magnitude lower. This paper presents a method which has been developed to achieve the proton beam flux of the order of 1 proton cm-2 s -1. The method is mainly based on reduction of the discharge current in the cyclotron internal Penning type ion source. Influence of this new operation mode on the lifetime of ion source cathodes is discussed.
Permanent Link: http://hdl.handle.net/11104/0293203