CYCLOTRONS2022 - List of Authors (Werthmüller, D.)

Paper	Title	Page
WEAO05	Investigation of Long Radial Probe Activation in the PSI Main Ring Cyclotron	163
	M.I. Besana, E. Hohmann, M. Sapinski, J. Snuverink, D. Werthmüller PSI, Villigen PSI, Switzerland
	During an inspection of a new Long Radial Probe, inserted into the Ring cyclotron only a month earlier, an activation hot spot has been identified. The nature of this hot spot has been investigated by performing measurements of the residual activation using shielded Al₂O₃:C dosimeters, 5 mm in diameter, and a portable gamma spectrometer. Monte Carlo simulations of the probe activation with various proton energies have been performed. Results show that most of the activation comes from relatively fast decaying radionuclides and therefore the residual dose drops sufficiently during the shutdown to allow for maintenance and upgrade works. Comparing the abundances of various radionuclides estimated from measured gamma spectra with simulations at various proton energies we conclude that the most probable loss mechanism is scattering of the protons on the upstream collimator.
	Slides WEAO05 [2.625 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEAO05
About •	Received ※ 21 December 2022 — Revised ※ 10 January 2023 — Accepted ※ 09 July 2023 — Issue date ※ 13 July 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Investigation of Long Radial Probe Activation in the PSI Main Ring Cyclotron

163

M.I. Besana, E. Hohmann, M. Sapinski, J. Snuverink, D. Werthmüller
PSI, Villigen PSI, Switzerland

During an inspection of a new Long Radial Probe, inserted into the Ring cyclotron only a month earlier, an activation hot spot has been identified. The nature of this hot spot has been investigated by performing measurements of the residual activation using shielded Al₂O₃:C dosimeters, 5 mm in diameter, and a portable gamma spectrometer. Monte Carlo simulations of the probe activation with various proton energies have been performed. Results show that most of the activation comes from relatively fast decaying radionuclides and therefore the residual dose drops sufficiently during the shutdown to allow for maintenance and upgrade works. Comparing the abundances of various radionuclides estimated from measured gamma spectra with simulations at various proton energies we conclude that the most probable loss mechanism is scattering of the protons on the upstream collimator.

Slides WEAO05 [2.625 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEAO05

About •

Received ※ 21 December 2022 — Revised ※ 10 January 2023 — Accepted ※ 09 July 2023 — Issue date ※ 13 July 2023

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)