A first prototype of C<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e271" altimg="si11.svg"><mml:msub><mml:mrow/><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:math>D<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e279" altimg="si11.svg"><mml:msub><mml:mrow/><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:math> total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Balibrea, J.; Lerendegui-Marco, J.; Calvo, D.; Caballero, L.; Babiano, V.; Ladarescu, I.; Redondo, M. Lopez; Taín, J. L.; Tolosa, A.; Domingo‐Pardo, C.; Calviño, F.; Casanovas, A.; Tarifeño-Saldivia, A.; Alcayne, V.; Cano‐Ott, D.; Martínez, T.; Guerrero, C.; Barbagallo, M.; Macina, D.; Bacak, M.

doi:10.1016/j.nima.2020.164709

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…On the other hand, the innovative capture-detection systems, i-TED and s-TED, have delivered already very satisfactory results and they still have margin for further enhancements and improvements in the forthcoming years. Progressive refinements in readout photosensors [48], electronics and structural materials [41] may contribute further to enhanced performances and new, more accurate and complete neutron-capture measurements.…”

Section: Discussionmentioning

confidence: 99%

The neutron time-of-flight facility n_TOF at CERN Recent facility upgrades and detector developments

Domingo-Pardo,

Aberle,

Alcayne

et al. 2023

J. Phys.: Conf. Ser.

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Based on an idea by Carlo Rubbia, the n_TOF facility at CERN has been operating for over 20 years. It is a neutron spallation source, driven by the 20 GeV/c proton beam from the CERN PS accelerator. Neutrons in a very wide energy range (from GeV, down to sub-eV kinetic energy) are generated by a massive Lead spallation target feeding two experimental areas. EAR1, horizonal with respect to the proton beam direction is set at 185 meters from the spallation target. EAR2, on the vertical line from the spallation source, is placed at 20 m. Neutron energies for experiments are selected by the time-of-flight technique (hence the name n_TOF), while the long flight paths ensure a very good energy resolution. Over one hundred experiments have been performed by the n_TOF Collaboration at CERN, with applications ranging from nuclear astrophysics (synthesis of the heavy elements in stars, big bang nucleosynthesis, nuclear cosmo-chronology), to advanced nuclear technologies (nuclear data for applications, nuclear safety), as well as for basic nuclear science (reaction mechanisms, structure and decay of highly excited compound states). During the planned shutdown of the CERN accelerator complex between 2019 and 2021, the facility went through a substantial upgrade with a new target-moderator assembly, refurbishing of the neutron beam lines and experimental areas. An additional measuring and irradiation station (the NEAR Station) has been envisaged and its capabilities for performing material test studies and new physics opportunities are presently explored. An overview of the facility and of the activities performed at CERN is presented in this contribution, with a particular emphasis on the most relevant experiments for nuclear astrophysics.

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Section: Discussionmentioning

confidence: 99%

The neutron time-of-flight facility n_TOF at CERN Recent facility upgrades and detector developments

Domingo-Pardo,

Aberle,

Alcayne

et al. 2023

J. Phys.: Conf. Ser.

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“…The aim is also to use silicon photomultipliers (SiPMs) instead of conventional photomultiplier tubes (PMTs), which shall enable a lower intrinsic neutron sensitivity and better overall performance. Some prototypes based on SiPM readout have already been developed [91].…”

Section: Future Perspectivesmentioning

confidence: 99%

n_TOF: Measurements of Key Reactions of Interest to AGB Stars

et al. 2022

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In the last 20 years, the neutron time-of-flight facility n_TOF at CERN has been providing relevant data for the astrophysical slow neutron capture process (s process). At n_TOF, neutron-induced radiative capture (n,γ) as well as (n,p) and (n,α) reaction cross sections are measured as a function of energy, using the time-of-flight method. Improved detection systems, innovative ideas and collaborations with other neutron facilities have lead to a considerable contribution of the n_TOF collaboration to studying the s process in asymptotic giant branch stars. Results have been reported for stable and radioactive samples, i.e., 24,25,26Mg,26Al, 33S, 54,57Fe, 58,59,62,63Ni, 70,72,73Ge, 90,91,92,93,94,96Zr, 139La, 140Ce, 147Pm, 151Sm, 154,155,157Gd, 171Tm, 186,187,188Os, 197Au, 203,204Tl, 204,206,207Pb and 209Bi isotopes, while others are being studied or planned to be studied in the near future. In this contribution, we present an overview of the most successful achievements, and an outlook of future challenging measurements, including ongoing detection system developments.

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“…The details on the apparatus and the experiment can be found in [8]. The reconstruction of the γ-ray energy depositions and interaction points in i-TED were based on our previous works [9,10].…”

Section: Compton Imaging For Background Rejection: Proof-of-conceptmentioning

confidence: 99%

Compton Imaging and Machine-Learning techniques for an enhanced sensitivity in key stellar (n,γ) measurements

et al. 2022

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Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant stars. To enhance the sensitivity of such measurements we have developed the i-TED detector. i-TED is an innovative detection system which exploits the Compton imaging technique with the aim of obtaining information about the incoming direction of the detected γ-rays. The imaging capability allows one to reject a large fraction of the dominant γ-ray background, hence enhancing the (n,γ) detection sensitivity. This work summarizes the main results of the first experimental proof-of-concept of the background rejection with i-TED carried out at CERN n_TOF using an early i-TED demonstrator. Two state-of-the-art C6D6 detectors were also used to benchmark the performance of i-TED. The i-TED prototype built for this study shows a factor of ~3 higher detection sensitivity than C6D6 detectors in the ~10 keV neutron-energy range of astrophysical interest. This works also introduces the perspectives of further enhancement in performance attainable with the final i-TED array and new analysis methodologies based on Machine-Learning techniques. The latter provide higher (n,γ) detection efficiency and similar enhancement in the sensitivity than the analytical method based on the Compton scattering law. Finally, we present our proposal to use this detection system for the first time on key astrophysical (n,γ) measurements, in particular on the s-process branching-point 79Se, which is especially well suited to constrain the thermal conditions of Red Giant and Massive Stars.

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A first prototype of C6D6 total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Cited by 7 publications

References 14 publications

The neutron time-of-flight facility n_TOF at CERN Recent facility upgrades and detector developments

The neutron time-of-flight facility n_TOF at CERN Recent facility upgrades and detector developments

n_TOF: Measurements of Key Reactions of Interest to AGB Stars

Compton Imaging and Machine-Learning techniques for an enhanced sensitivity in key stellar (n,γ) measurements

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