Measurement of the proton beam energy of a medical cyclotron based on Rutherford Back-scattering Analysis

Campajola, L.; Braccini, S.; Casolaro, Pierluigi; Luca, Daniela De; Ereditato, A.; Häffner, Philipp Daniel; Scampoli, P.

doi:10.1016/j.nimb.2018.12.017

Cited by 12 publications

(10 citation statements)

References 11 publications

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“…The beam energy was found to be 18.19 ± 0.05 MeV with excellent agreement among the two measurements. 10 The spectrum recorded for the carbon target, shown in Fig. 3, shows peaks at energies smaller than those of the elastic channel.…”

Section: -4mentioning

confidence: 97%

“…The measurement of the cyclotron energy was carried out with a method based on Rutherford Backscattering Spectroscopy (RBS), fully described in Ref. 10. For the sake of clarity, we recall its main points before focusing on the important outcome of the spectroscopy measurements performed with the carbon target.…”

Section: Energy Measurement and Nuclear Spectroscopy Of The 12 C Nucleusmentioning

confidence: 99%

“…Preliminary experiments were performed among which was the direct measurement of the energy of the cyclotron. 10 In this measurement, based on the Rutherford Backscattering Spectroscopy (RBS) technique, we used two target materials (gold and graphite) for the precise determination of the incident beam energy and its width. As a confirmation of the measured values, we performed a further analysis of the energy spectra recorded with the graphite target.…”

Section: Introductionmentioning

confidence: 99%

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Nuclear physics experiments with a medical cyclotron

Casolaro

Campajola

Braccini

et al. 2020

Int. J. Mod. Phys. Conf. Ser.

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Experiments of nuclear physics have been carried out at the Bern medical cyclotron, in which a beam line dedicated to research activities is available. Our main goal is to upgrade this facility as a well-characterized neutron source for studies of radiation hardness and for tests of new neutron detectors. To achieve this result, preliminary measurements have been carried out among which the measurement of the incident proton energy by means of a method based on Rutherford backscattering spectroscopy. The analysis of the energy spectrum corresponding to protons elastically and inelastically backscattered by the carbon target allowed the precise identification of the excited states of 12C, including the Hoyle state. These results confirmed the Bern medical cyclotron as a reliable facility to perform research activities in the field of fundamental nuclear physics as well as of applied physics.

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Section: -4mentioning

confidence: 97%

Section: Energy Measurement and Nuclear Spectroscopy Of The 12 C Nucleusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nuclear physics experiments with a medical cyclotron

Casolaro

Campajola

Braccini

et al. 2020

Int. J. Mod. Phys. Conf. Ser.

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“…Also variations of the beam parameters have not shown a strong impact on the neutron spectrum. The beam energy extracted to the BTL was accurately measured by previous experiments 53,[63][64][65] . Thus, we used the measured energy value of (18.2 ± 0.4) MeV energy with a circular Gaussian shape of 3.5 mm FWHM.…”

Section: Fluka Monte Carlo Simulationsmentioning

confidence: 99%

Neutron fields at high- and low-energy particle accelerators: a novel experimental approach based on the DIAMON spectrometer

Braccini

Casolaro

Dellepiane

et al. 2022

Preprint

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The characterization of particle accelerator induced neutron fields is challenging but fundamental for research and industrial activities, including radiation protection, neutron metrology, developments of neutron detectors for nuclear and high-energy physics, decommissioning of nuclear facilities, and studies of neutron damage on materials and electronic components. This work reports on the study of a novel approach to the experimental characterization of neutron spectra at two complex accelerator environments, namely the CERF, a high-energy mixed reference field at CERN in Geneva, and the Bern medical cyclotron laboratory, a facility used for multi-disciplinary research activities, and for commercial radioisotope production for nuclear medicine. In particular, measurements were performed through an innovative active neutron spectrometer called DIAMON, a device developed to provide in real time neutron energy spectra without the need of guess distributions. The intercomparison of DIAMON measurements with reference data, Monte Carlo simulations, and with the well-established neutron monitor Berthold LB 6411, has been found to be highly satisfactory in all conditions. It was demonstrated that DIAMON is an almost unique device able to characterize neutron fields induced by hadrons at 120 GeV/c as well as by protons at 18 MeV colliding with different materials. The accurate measurement of neutron spectra at medical cyclotrons during routine radionuclides production for nuclear medicine applications is of paramount importance for the facility decommissioning. The findings of this work are the basis for establishing a methodology for producing controlled proton-induced neutron beams with medical cyclotrons.

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“…At the Bern cyclotron, the beam energy was measured using absorbers of different thickness [4] or a segmented Faraday cup [5]. A further measurement was performed based on Rutherford backscattering (RBS) [6]. These studies suggested a dependence of the extracted beam energy with respect to the magnetic field in the cyclotron main coil, which determines the resonance conditions.…”

Section: Introductionmentioning

confidence: 99%

Study of the Extracted Beam Energy as a Function of Operational Parameters of a Medical Cyclotron

et al. 2019

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The medical cyclotron at the Bern University Hospital (Inselspital) is used for both routine 18 F production for Positron Emission Tomography (PET) and multidisciplinary research. It provides proton beams of variable intensity at a nominal fixed energy of 18 MeV. Several scientific activities, such as the measurement of nuclear reaction cross-sections or the production of non-conventional radioisotopes for medical applications, require a precise knowledge of the energy of the beam extracted from the accelerator. For this purpose, a study of the beam energy was performed as a function of cyclotron operational parameters, such as the magnetic field in the dipole magnet or the position of the extraction foil. The beam energy was measured at the end of the 6 m long Beam Transfer Line (BTL) by deflecting the accelerated protons by means of a dipole electromagnet and by assessing the deflection angle with a beam profile detector.

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Measurement of the proton beam energy of a medical cyclotron based on Rutherford Back-scattering Analysis

Cited by 12 publications

References 11 publications

Nuclear physics experiments with a medical cyclotron

Nuclear physics experiments with a medical cyclotron

Neutron fields at high- and low-energy particle accelerators: a novel experimental approach based on the DIAMON spectrometer

Study of the Extracted Beam Energy as a Function of Operational Parameters of a Medical Cyclotron

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