n/γ detection with a CLYC crystal in a phoswich configuration with other inorganic scintillators

International audienceWe tested the detection performances of a CLYC crystal when optically coupled to, in turn, LaBr3:Ce, CeBr3, SrI2:Eu and BGO scintillator, in a phoswich configuration, for the R&D of a neutron and gamma detector for application in nuclear physics studies. The interest of this work is to investigate the feasibility of a compact, solid-state detector as an alternative to the commonly used liquid scintillators or 3He gas proportional counters for the detection of neutrons. The ultimate goal will be to associate the phoswich with HPGe detectors in compact geometry to measure the energy of the beta-delayed neutrons, with good efficiency, in coincidence with gamma rays from exotic sources produced at present or next generation radioactive ion-beam facilities such as ALTO or SPIRAL2.We were interested in evaluating the effect of coupling two scintillators while maintaining the possibility to exploit their appealing properties (n detection/high light yield/high stopping power). In this communication we will report on the study of the light yield and energy resolution of elpasolite-based phoswich scintillators when irradiated with standard gamma ray and neutron sources. We will present as well the response of the phoswich detectors to neutrons in the energy range between 0.5 to 12 MeV. These results are the outcomes of an in beam campaign at the LICORNE inverse kinematics neutrons source facility, recently developed at ALTO

EPICS Based Control System for SPES Tape Station for Beam Characterization: Motion System and Controls

International audienceThe SPES* Tape Station (STS) for Radioactive Ion Beams (RIBs) characterization is under construction at LNL. This tool will be used to measure the actual composition of the radioactive ion beams extracted from the SPES-β ion source and to optimize the source’s parameters. STS will provide beam diagnostic information by determining the beam composition and intensity. At the same time, it will be able to measure the target release curves needed for the source’s characterization and development. The core part of the system, the related motor and controls are being designed and constructed in synergy with IPN Orsay (France), iThemba Laboratories (South Africa) and the Gamma collaboration (INFN-CSN3). In particular, the mechanical part is based on the existing BEDO** tape system operated in ALTO while the control system for motion is an EPICS*** base application under implementation by iThemba and INFN, result of a upgrade operation required to substitute obsoleted hardware and update logic and algorithm

Temperature-Induced Aging Effect on Extruded Scintillators and Optical Fibers for the Pierre Auger Observatory Upgrade

In the framework of the Pierre Auger Observatory upgrade, which foresees the installation of scintillator-based surface detectors placed above the water-Cherenkov tanks, we studied the light yield and the effect of temperature cycling for different extruded scintillators/optical fibers configurations. In this paper we will report on the light yield of extruded scintillators read out with wavelength shifting optical fibers, optically coupled to a PMT. We tested many different geometries, different fibers qualities and diameters and different scintillators providers. Then, for a selected number of configurations, we tested the effect of temperature variations on the detector response, in a climatic chamber. In order to reproduce the thermic excursion that will affect the detectors installed in the field in Argentina (between -5°C to +40°C), we studied the scintillator response in the temperature range from -20°C to +70°C. We performed as well many temperature cycles between -20°C to +50°C to study the temperature-induced degradation on the detectors due to mechanical stress

Accompagner, Evoluer, Transmettre. Les prospectives techniques de l'IN2P3.

Report of the technical prospectives of the IN2P3 conducted in 2021.Rapport des prospectives techniques de l'IN2P3 réalisées en 2021

PMm2: R&D on triggerless acquisition for next generation neutrino experiments

The next generation of proton decay and neutrino experiments, the post-SuperKamiokande detectors, such as those that will take place in megaton size water tanks, will require very large surfaces of photo-detection and will produce a large volume of data. Even with large hemispherical photomultiplier tubes (PMTs), the expected number of channels should reach hundreds of thousands. An ANR funded R&D program to implement a solution is presented here. The very large surface of photo-detection is segmented in macro pixels consisting of an array (2 × 2 m2) of 16 hemispherical 12-inch PMTs connected to autonomous underwater front-end electronics working in a triggerless data acquisition mode. The array is powered by a common high voltage and only one data cable allows the connection by network to the surface controller. This architecture allows a considerable reduction of the cost and facilitates the industrialization. This paper presents the complete architecture of the prototype system and tests results with 16 8-inch PMTs, validating the whole electronics, the built-in gain adjustment and the calibration principle. © 2011 IOP Publishing Ltd and SISSA.SCOPUS: cp.jinfo:eu-repo/semantics/publishe