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1.
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Secondary neutrons inside a proton therapy facility: MCNPX simulations compared to measurements performed with a Bonner Sphere Spectrometer and neutron H*(10) monitors
/ De Smet, Valérie (IRISIB, Bruxelles ; Brussels U., IIHE) ; De Saint-Hubert, Marijke (SCK-CEN, Mol) ; Dinar, Nesrine (CERN ; Joseph Fourier U.) ; Manessi, Giacomo Paolo (CERN) ; Aza, Eleni (CERN ; Aristotle U., Thessaloniki) ; Cassell, Christopher (Milan Polytechnic) ; Saldarriaga Vargas, Clarita (SCK-CEN, Mol) ; Van Hoey, Olivier (SCK-CEN, Mol) ; Mathot, Gilles (IBA, Louvain-la-Neuve) ; Stichelbaut, Frédéric (IBA, Louvain-la-Neuve) et al.
Neutron spectrometry measurements with an extended-range Bonner Sphere Spectrometer (BSS), as well as neutron H*(10) measurements using an extended-range rem meter WENDI-2, a conventional rem meter LB 6411 and a tissue-equivalent proportional counter, were performed inside and around the Fixed-Beam Treatment Room at the proton therapy facility of Essen, in Germany. The WENDI-2 stood out as the easiest detector for making accurate neutron H*(10) measurements, since its direct measurements were equivalent to the H*(10) rates obtained with the BSS. [...]
2017 - 16 p.
- Published in : Radiat. Meas. 99 (2017) 25-40
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2.
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SECONDARY NEUTRON DOSES IN A PROTON THERAPY CENTRE
/ De Saint-Hubert, M (SCK-CEN, Mol) ; Saldarriaga Vargas, C (SCK-CEN, Mol) ; Van Hoey, O (SCK-CEN, Mol) ; Schoonjans, W (SCK-CEN, Mol) ; De Smet, V (ISIB, Brussels ; Brussels U., IIHE) ; Mathot, G (IBA, Louvain-la-Neuve) ; Stichelbaut, F (IBA, Louvain-la-Neuve) ; Manessi, G (CERN ; Liverpool U.) ; Dinar, N (CERN) ; Aza, E (CERN) et al.
The formation of secondary high-energy neutrons in proton therapy can be a concern for radiation protection of staff. In this joint intercomparative study (CERN, SCK•CEN and IBA/IRISIB/ULB), secondary neutron doses were assessed with different detectors in several positions in the Proton Therapy Centre, Essen (Germany). [...]
2016 - 6 p.
- Published in : Radiat. Prot. Dosim. 170 (2015) 336-341
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3.
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A Bonner Sphere Spectrometer for pulsed fields
/ Aza, E (CERN ; Thessaloniki U.) ; Dinar, N (CERN) ; Manessi, G P (CERN ; Liverpool U.) ; Silari, M (CERN)
The use of conventional Bonner Sphere Spectrometers (BSS) in pulsed neutron fields (PNF) is limited by the fact that proportional counters, usually employed as the thermal neutron detectors, suffer from dead time losses and show severe underestimation of the neutron interaction rate, which leads to strong distortion of the calculated spectrum. In order to avoid these limitations, an innovative BSS, called BSS-LUPIN, has been developed for measuring in PNF. [...]
2018 - 5 p.
- Published in : Radiat. Prot. Dosim. 168 (2018) 149-153
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4.
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Fulltext
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5.
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Instrument intercomparison in the high-energy mixed field at the CERN-EU reference field (CERF) facility
/ Caresana, Marco (Milan Polytechnic) ; Helmecke, Manuela (Helmholtz-Zentrum, Berlin) ; (Kubancak, Jan ; ASCR, Nucl. Phys. Inst., Rez. ; Prague, Tech. U.) ; Manessi, Giacomo (CERN ; U. Liverpool (main)) ; Ott, Klaus (Helmholtz-Zentrum, Berlin) ; Scherpelz, Robert (PNL, Richland) ; Silari, Marco (CERN)
This paper discusses an intercomparison campaign performed in the mixed radiation field at the CERN-EU (CERF) reference field facility. Various instruments were employed: conventional and extended-range rem counters including a novel instrument called LUPIN, a bubble detector using an active counting system (ABC 1260) and two tissue-equivalent proportional counters (TEPCs). [...]
2014
- Published in : Radiat. Prot. Dosim. 161 (2014) 67-72
Oxford Univ. Press Open Access article: PDF;
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6.
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Instrument intercomparison in the pulsed neutron fieldsat the CERN HiRadMat facility
/ Aza, E (CERN) ; Caresana, M (Milan Polytechnic) ; Cassell, C (Wollongong U. ; Milan Polytechnic) ; Charitonidis, N (CERN ; Ecole Polytechnique, Lausanne, LPAP) ; Harrouch, E (CERN) ; Manessi, G P (CERN ; Liverpool U.) ; Pangallo, M (CERN) ; Perrin, D (CERN) ; Samara, E (CERN ; Athens U.) ; Silari, M (CERN)
An intercomparison of the performances of active neutron detectors was carried out in pulsed neutron fi elds in the new HiRadMat facility at CERN. Five detectors were employed: four of them (two ionization chambers and two rem counters) are routinely employed in the CERN radiation monitoring system, while the fi fth is a novel instrument, called LUPIN, speci fi cally conceived for applications in pulsed neutron fi elds. [...]
2014 - 8 p.
- Published in : Radiat. Meas. 61 (2014) 25-32
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7.
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8.
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Comparison of the performance of different instruments in the stray neutron field around the CERN Proton Synchrotron
/ Aza, Eleni (CERN) ; Caresana, Marco ; Cassell, Christopher ; Colombo, Valeria ; Damjanovic, Sanja (CERN) ; Gilardoni, Simone (CERN) ; Manessi, Giacomo Paolo (CERN) ; Pangallo, Michel (CERN) ; Perrin, Daniel (CERN) ; Silari, Marco (CERN)
This paper discusses an intercomparison campaign carried out in several locations around the CERN Proton Synchrotron. The locations were selected in order to perform the measurements in different stray field conditions. [...]
2014 - 6 p.
- Published in : Radiat. Prot. Dosim. 161 (2014) 190-195
In : 12th International SYmposium on Neutron and Ion Dosimetry Symposium, Aix-en-provence, France, 3 - 7 Jun 2013, pp.190-195
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9.
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Monitoring reactions for the calibration of relativistic hadron beams
/ Ferrari, A (CERN) ; La Torre, F P (CERN ; Bern U., LHEP) ; Manessi, G P (CERN ; Liverpool U.) ; Pozzi, F (CERN ; Munich, Tech. U.) ; Silari, M (CERN)
The well-known foil activation technique was used to calibrate an ionisation chamber employed for the on-line beam monitoring of a 120 GeV c −1 mixed proton/pion beam at CERN. Two monitoring reactions were employed: the standard 27 Al(p,3pn) 24 Na and the alternative nat Cu(p,x) 24 Na. [...]
2014 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 763 (2014) 177-183
Elsevier Open Access article: PDF;
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10.
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Intercomparison of radiation protection instrumentation in a pulsed neutron field
/ Caresana, M (Milan Polytechnic) ; Denker, A (Helmholtz-Zentrum, Berlin) ; Esposito, A (IFNF-LNF, FISMEL, via E. Fermi 40, 00044 Frascati, Italy) ; Ferrarini, M (CNAO, Via Privata Campeggi, 27100 Pavia, Italy) ; Golnik, N (Warsaw U. of Tech.) ; Hohmann, E (PSI, Villigen) ; Leuschner, A (DESY) ; Luszik-Bhadra, M (Braunschweig, Phys. Tech. Bund.) ; Manessi, G (CERN ; Liverpool U.) ; Mayer, S (PSI, Villigen) et al.
In the framework of the EURADOS working group 11, an intercomparison of active neutron survey meters was performed in a pulsed neutron field (PNF). The aim of the exercise was to evaluate the performances of various neutron instruments, including commercially available rem-counters, personal dosemeters and instrument prototypes. [...]
2014 - 10 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 737 (2014) 203-213
Elsevier Open Access article: PDF;
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