Micromegas in a bulk Giomataris, I.; De Oliveira, R.; Andriamonje, S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/2006, Letnik:
560, Številka:
2
Journal Article
Recenzirano
Odprti dostop
In this paper, we present a novel way to manufacture the bulk Micromegas detector. A simple process based on the Printed Circuit Board (PCB) technology is employed to produce the entire sensitive ...detector. Such a fabrication process could be extended to very large area detectors made by the industry. The low cost fabrication together with the robustness of the electrode materials will make it attractive for several applications ranging from particle physics and astrophysics to medicine.
In order to obtain high precision cross-section measurements using the time-of-flight technique, it is important to know with good accuracy the neutron uence at the measuring station. The detector ...dedicated to these measurements should be placed upstream of the detectors used for capture and fission cross-section measurements. The main requirement is to reduce the material of the detector as much as possible, in order to minimize the perturbation of the neutron beam and, especially, the background produced by the device itself. According to these considerations, a new neutron detector equipped with a small-mass device based on MicroMegas "Micro-bulk" technology has been developed as a monitoring detector for the CERN n TOF neutron beam. A description of the different characteristics of this innovative concept of transparent detector for neutron beam monitoring is presented. The result obtained in the commissioning of the new spallation targetof the n TOF facility at CERN is shown, compared with simulations performed with the FLUKA code. KCI Citation Count: 16
New neutron detector based on micromegas technology for ADS projects Andriamonje, Samuel; Andriamonje, Grégory; Aune, Stephan ...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
06/2006, Letnik:
562, Številka:
2
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
A new neutron detector based on Micromegas technology has been developed for the measurement of the simulated neutron spectrum in the ADS project. After the presentation of simulated neutron spectra ...obtained in the interaction of 140
MeV protons with the spallation target inside the TRIGA core, a full description of the new detector configuration is given. The advantage of this detector compared to conventional neutron flux detectors and the results obtained with the first prototype at the CELINA 14
MeV neutron source facility at CEA-Cadarache are presented. The future developments of operational Piccolo-Micromegas for fast neutron reactors are also described.
A novel detector for 2D neutron beam diagnostic has been jointly developed by CERN andCEA in the framework of the n TOF Collaboration for investigation of the neutron beam spatial characteristics, ...namely position and profile as a function of the neutron energy. The detector is based on the already established MicroMegas "Bulk" technology and has been evolved from the one used for the CAST (CERN Axion Solar Telescope) experiment but equipped with an appropriate neutron/charged particle converter for neutron detection. The experimental results obtained in the 2009 commissioning run of the n_TOF facility and a comparison with simulations performed by means of FLUKA code are given, together with future perspectives and possible applications for this original type of neutron detector. KCI Citation Count: 5
The absolute efficiency of a high purity germanium (HPGe) detector was determined with a point-like calibrated
152Eu source at two distances from the detector and three pure metallic thorium foils of ...different thicknesses. The experimental values are compared with the ones determined with the simulation codes MCNP4B and GEANT 3.21. A procedure for HPGe absolute efficiency calibration is proposed for
γ-ray energies higher than 200
keV.
After a short description of the Micromegas principle, a concept of new neutron detectors based on this technique is presented. It is illustrated by an overall picture of the use of these detectors ...in different domains such as: nuclear physics, inertial fusion and industrial applications. A particular description will be devoted to two topics. The first one concerns the compact detector named ldquoPiccolo- Micromegasrdquo. This detector, capable of measuring a neutron flux in a broad range of neutron energies, is developed for the measurements of the in-core neutrons flux of future generations of nuclear reactors. The second one based on the new micro-bulk concept is developed for a monitoring detector of a neutron beam.
Experimental studies of a Micromegas neutron detector Andriamonje, S; Cano-Ott, D; Delbart, A ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
04/2002, Letnik:
481, Številka:
1
Journal Article
Recenzirano
A Micromegas detector to be used as a neutron beam profiler has been tested in the CENBG neutron beam. Two thin solid targets (
6
Li and
10
B) have been used as neutron converters. We report results ...on the detection efficiency and spatial resolution of the detector.
Spherical TPC development and trends Andriamonje, S; Aune, S; Bougamont, E ...
Journal of physics. Conference series,
07/2009, Letnik:
179, Številka:
1
Journal Article
Recenzirano
Odprti dostop
We present a new type of gaseous detectors, the spherical proportional counter. It consists of a small metallic ball, 16 mm in diameter, located at the centre of curvature of a large spherical ...vessel, acting as a proportional amplification structure. It allows high gas gains to be reached and operates from low to high gas pressure. This simple and robust structure allows large volumes to be read out with a single electronic channel. The detector performance presently achieved is already close to fulfil the demands of many challenging projects from low energy neutrino physics to dark matter detection with applications in neutron, alpha, gamma spectroscopy. Preliminary results of neutron flux measurements currently going on in underground laboratory will be presented.
PDF
