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Title: Measurements and FLUKA Simulations of Bismuth, Aluminium and Indium Activation at the upgraded CERN Shielding Benchmark Facility (CSBF)
Authors: Iliopoulou, E.
Bamidis, P.
Brugger, M.
Froeschl, R.
Infantino, A.
Kajimoto, T.
Nakao, N.
Roesler, S.
Sanami, T.
Siountas, A.
Yashima, H.
Author's alias: 八島, 浩
Issue Date: 12-Jun-2018
Publisher: IOP Publishing
Journal title: Journal of Physics: Conference Series
Volume: 1046
Issue: 1
Thesis number: 012004
Abstract: The CERN High energy AcceleRator Mixed field (CHARM) facility is situated in the CERN Proton Synchrotron (PS) East Experimental Area. The facility receives a pulsed proton beam from the CERN PS with a beam momentum of 24 GeV/c with 5centerdot10¹¹ protons per pulse with a pulse length of 350 ms and with a maximum average beam intensity of 6.7centerdot10¹⁰ protons per second. The extracted proton beam impacts on a cylindrical copper target. The shielding of the CHARM facility includes the CERN Shielding Benchmark Facility (CSBF) situated laterally above the target that allows deep shielding penetration benchmark studies of various shielding materials. This facility has been significantly upgraded during the extended technical stop at the beginning of 2016. It consists now of 40 cm of cast iron shielding, a 200 cm long removable sample holder concrete block with 3 inserts for activation samples, a material test location that is used for the measurement of the attenuation length for different shielding materials as well as for sample activation at different thicknesses of the shielding materials. Activation samples of bismuth, aluminium and indium were placed in the CSBF in September 2016 to characterize the upgraded version of the CSBF. Monte Carlo simulations with the FLUKA code have been performed to estimate the specific production yields of bismuth isotopes (²⁰⁶ Bi, ²⁰⁵ Bi, ²⁰⁴ Bi, ²⁰³ Bi, ²⁰² Bi, ²⁰¹ Bi) from ²⁰⁹ Bi, ²⁴ Na from ²⁷ Al and ¹¹⁵ m I from ¹¹⁵ I for these samples. The production yields estimated by FLUKA Monte Carlo simulations are compared to the production yields obtained from γ-spectroscopy measurements of the samples taking the beam intensity profile into account. The agreement between FLUKA predictions and γ-spectroscopy measurements for the production yields is at a level of a factor of 2.
Description: 4th International Workshop on Accelerator Radiation Induced Activation (ARIA 2017), 22–24 May 2017, Lund, Sweden
Rights: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
DOI(Published Version): 10.1088/1742-6596/1046/1/012004
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