A detector based on silica fibers for ion beam monitoring in a wide current range


Autoria(s): Auger, Martin; Braccini, Saverio; Carzaniga, Tommaso Stefano; Ereditato, Antonio; Nesteruk, Konrad Pawel; Scampoli, Paola
Data(s)

29/03/2016

Resumo

A detector based on doped silica and optical fibers was developed to monitor the profile of particle accelerator beams of intensity ranging from 1 pA to tens of µA. Scintillation light produced in a fiber moving across the beam is measured, giving information on its position, shape and intensity. The detector was tested with a continuous proton beam at the 18 MeV Bern medical cyclotron used for radioisotope production and multi-disciplinary research. For currents from 1 pA to 20 µA, Ce3+ and Sb3+ doped silica fibers were used as sensors. Read out systems based on photodiodes, photomultipliers and solid state photomultipliers were employed. Profiles down to the pA range were measured with this method for the first time. For currents ranging from 1 pA to 3 µA, the integral of the profile was found to be linear with respect to the beam current, which can be measured by this detector with an accuracy of ∼1%. The profile was determined with a spatial resolution of 0.25 mm. For currents ranging from 5 µA to 20 µA, thermal effects affect light yield and transmission, causing distortions of the profile and limitations in monitoring capabilities. For currents higher than ∼1 µA, non doped optical fibers for both producing and transporting scintillation light were also successfully employed.

Formato

application/pdf

Identificador

http://boris.unibe.ch/83432/1/A%20detector%20based%20on%20silica%20fibers....pdf

Auger, Martin; Braccini, Saverio; Carzaniga, Tommaso Stefano; Ereditato, Antonio; Nesteruk, Konrad Pawel; Scampoli, Paola (2016). A detector based on silica fibers for ion beam monitoring in a wide current range. Journal of instrumentation, 11(P03027), P03027-P03027. Institute of Physics Publishing IOP 10.1088/1748-0221/11/03/P03027 <http://dx.doi.org/10.1088/1748-0221/11/03/P03027>

doi:10.7892/boris.83432

info:doi:10.1088/1748-0221/11/03/P03027

urn:issn:1748-0221

Idioma(s)

eng

Publicador

Institute of Physics Publishing IOP

Relação

http://boris.unibe.ch/83432/

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Auger, Martin; Braccini, Saverio; Carzaniga, Tommaso Stefano; Ereditato, Antonio; Nesteruk, Konrad Pawel; Scampoli, Paola (2016). A detector based on silica fibers for ion beam monitoring in a wide current range. Journal of instrumentation, 11(P03027), P03027-P03027. Institute of Physics Publishing IOP 10.1088/1748-0221/11/03/P03027 <http://dx.doi.org/10.1088/1748-0221/11/03/P03027>

Palavras-Chave #530 Physics
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

PeerReviewed