dorsal/arxiv
View SchemaNeutron imaging with a Micromegas detector
| Authors | F. Jeanneau, R. Junca, J. Pancin, M. Voytchev, S. Andriamonje, V. Dangendorf, I. Espagnon, H. Friedrich, A. Giganon, I. Giomataris, A. Menelle, A. Pluquet, L. R. Rodriguez |
|---|---|
| Categories | |
| ArXiv ID | physics/0607191 |
| URL | https://arxiv.org/abs/physics/0607191 |
| DOI | 10.1109/TNS.2006.870175 |
| Journal | IEEE-TNS, vol. 53, No 2, april 2006, p 595-600 |
Abstract
The micropattern gaseous detector Micromegas has been developed for several years in Saclay and presents good performance for neutron detection. A prototype for neutron imaging has been designed and new results obtained in thermal neutron beams are presented. Based on previous results demonstrating a good 1D spatial resolution, a tomographic image of a multiwire cable has been performed using a 1D Micromegas prototype. The number of pillars supporting the micromesh is too large and leads to local losses of efficiency that distort the tomographic reconstruction. Nevertheless, this first tomographic image achieved with this kind of detector is very encouraging. The next worthwhile development for neutron imaging is to achieve a bi-dimensional detector, which is presented in the second part of this study. The purpose of measurements was to investigate various operational parameters to optimize the spatial resolution. Through these measurements the optimum spatial resolution has been found to be around 160 microns (standard deviation) using Micromegas operating in double amplification mode. Several 2D imaging tests have been carried out. Some of these results have revealed fabrication defects that occurred during the manufacture of Micromegas and that are limiting the full potential of the present neutron imaging system.
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"abstract": "The micropattern gaseous detector Micromegas has been developed for several\nyears in Saclay and presents good performance for neutron detection. A\nprototype for neutron imaging has been designed and new results obtained in\nthermal neutron beams are presented. Based on previous results demonstrating a\ngood 1D spatial resolution, a tomographic image of a multiwire cable has been\nperformed using a 1D Micromegas prototype. The number of pillars supporting the\nmicromesh is too large and leads to local losses of efficiency that distort the\ntomographic reconstruction. Nevertheless, this first tomographic image achieved\nwith this kind of detector is very encouraging. The next worthwhile development\nfor neutron imaging is to achieve a bi-dimensional detector, which is presented\nin the second part of this study. The purpose of measurements was to\ninvestigate various operational parameters to optimize the spatial resolution.\nThrough these measurements the optimum spatial resolution has been found to be\naround 160 microns (standard deviation) using Micromegas operating in double\namplification mode. Several 2D imaging tests have been carried out. Some of\nthese results have revealed fabrication defects that occurred during the\nmanufacture of Micromegas and that are limiting the full potential of the\npresent neutron imaging system.",
"arxiv_id": "physics/0607191",
"authors": [
"F. Jeanneau",
"R. Junca",
"J. Pancin",
"M. Voytchev",
"S. Andriamonje",
"V. Dangendorf",
"I. Espagnon",
"H. Friedrich",
"A. Giganon",
"I. Giomataris",
"A. Menelle",
"A. Pluquet",
"L. R. Rodriguez"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1109/TNS.2006.870175",
"journal_ref": "IEEE-TNS, vol. 53, No 2, april 2006, p 595-600",
"title": "Neutron imaging with a Micromegas detector",
"url": "https://arxiv.org/abs/physics/0607191"
},
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