ULTRA-LOW INTENSITY PROTON BEAMS FOR RADIATION RESPONSE RELATED EXPERIMENTS AT THE U-120M CYCLOTRON

Authors

  • Tomas Matlocha Nuclear Physics Institute of the CAS, p.r.i. Rez 130, 250 68 Rez, Czech Republic Czech Technical University in Prague, FNSPE, Brehova 7, 115 19 Praha 1, Czech Republic
  • Filip Krizek Nuclear Physics Institute of the CAS, p.r.i. Rez 130, 250 68 Rez, Czech Republic

DOI:

https://doi.org/10.14311/APP.2018.14.0021

Keywords:

ultra-low intensity proton flux, Penning ion source, negative hydrogen yield resonance, cyclotron irradiation facility, radiation hardness tests

Abstract

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.

Downloads

Published

2018-05-17

Issue

Vol. 14 (2018): ŠIMÁNĚ 2017

Section

Articles

License

Copyright notice

Authors who publish with this journal agree to the following terms:

1. Authors retain copyright and grant the journal the right of the first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., to post it to an institutional repository or to publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges as well as earlier and greater citation of the published work (See The Effect of Open Access).