Papers by Jean-François LOUDE
Keywords: Electroaimants ; Pierre Weiss Reference EPFL-CHAPTER-224628 Record created on 2017-01-2... more Keywords: Electroaimants ; Pierre Weiss Reference EPFL-CHAPTER-224628 Record created on 2017-01-23, modified on 2017-01-24
L’Association Vibiscum a présidé la pose de 54 plaques historiques sur des monuments importants d... more L’Association Vibiscum a présidé la pose de 54 plaques historiques sur des monuments importants de l’histoire veveysanne. Une brochure retraçant le contenu des 35 premières plaques était sortie en mai 2010. En juin 2019, pour fêter ses 30 ans, Vibiscum a publié une réédition de cet ouvrage, corrigée et augmentée par les 19 nouvelles plaques posées depuis 2010, le tout également intégralement traduit en anglais.À cette même occasion, des QR codes ont été posés sur les 54 plaques, permettant aux visiteurs équipés de smartphones d’avoir accès à un supplément d’informations, à des illustrations historiques et à une carte de la ville pour partir à la découverte de toutes les plaques veveysannes.Alexandra Seraïdaris, Karina Queijo, Guillaume Favrod, Jean-François Loude, Plaques veveysannes / Vevey Plaques, éd. corrigée et augmentée, Association Vibiscum, 2019, 248 p.
Heinrich von Wild (1833-1902) and his Polaristrobometer Born near Zurich, Heinrich Wild studied p... more Heinrich von Wild (1833-1902) and his Polaristrobometer Born near Zurich, Heinrich Wild studied physics and became in 1858 professor at the University of Bern. In 1868, he was called to the direction of the Central Physical (Meteorological) Observatory in Saint Petersburg. During his 27 years in Russia, he was busy studying meteorology and terrestrial magnetism, enormously extending the network of observing stations in Russia, publishing results, working on the improvement and standardisation of meteorological instruments and actively participating in international conferences. He was also concerned with the standardisation of weights and measures.
This paper presents the development of new Ce-doped, fast and high e!ective-Z mixed Lu AP:Ce crys... more This paper presents the development of new Ce-doped, fast and high e!ective-Z mixed Lu AP:Ce crystals. These crystals have been grown by the Czochralski method and good results have been obtained with x"0.1, 0.2 and 0.3 for Y## ions and roughly between x"0.6 and 0.7 for Gd## ions. Relative light yields measured for the AP:Ce crystals are 40}75% higher than for BGO and are comparable to the light yield of YAP:Ce crystal. Measured energy resolutions at 662 keV range over 8}15.3% FWHM and are close to the energy resolution obtained with YAP:Ce. Thermally stimulated luminescence (TSL) measurements above room temperature have also been performed: in accordance with the expected e!ect of trap states on scintillation e$ciency, an anticorrelation between TSL intensity and light yield is found. # 2000 Elsevier Science B.V. All rights reserved.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003
Physics Letters B, 1993
Inclusive direct photon invariant cross sections have been measured in both pp and pp collisions ... more Inclusive direct photon invariant cross sections have been measured in both pp and pp collisions at &surd;s = 24.3 GeV at the CERN SPS, permitting the first measurement of the difference of the pp and pp cross sections. The direct photon cross section in pp collisions has been found to be systematically larger than that in pp collisions, which indicates
IEEE Transactions on Nuclear Science, 2006
This paper describes the LSO/LuYAP phoswich detector head developed for the ClearPET small animal... more This paper describes the LSO/LuYAP phoswich detector head developed for the ClearPET small animal PET scanner demonstrator that is under construction in Lausanne within the Crystal Clear Collaboration. The detector head consists of a dual layer of 8 8 LSO and LuYAP crystal arrays coupled to a multi-anode photomultiplier tube (Hamamatsu R7600-M64). Equalistion of the LSO/LuYAP light collection is obtained through partial attenuation of the LSO scintillation light using a thin aluminum deposit of 20-35 nm on LSO and appropriate temperature regulation of the phoswich head between 30 C to 60 C. At 511 keV, typical FWHM energy resolutions of the pixels of a phoswich head amounts to (28 2)% for LSO and (25 2)% for LuYAP. The LSO versus LuYAP crystal identification efficiency is better than 98%. Six detector modules have been mounted on a rotating gantry. Axial and tangential spatial resolutions were measured up to 4 cm from the scanner axis and compared to Monte Carlo simulations using GATE. FWHM spatial resolution ranges from 1.3 mm on axis to 2.6 mm at 4 cm from the axis. Index Terms-Positron emission tomography, phoswich detector, depth-of-interaction, small animal PET scanner. I. INTRODUCTION P OSITRON EMISSION TOMOGRAPHY (PET) applied to small animal imaging is a potentially important tool in developing new drugs and imaging gene expression. Human scanners, which have a spatial resolution of the order of 3-4 mm, do not allow to resolve and quantify radiotracer concentration within sub-organ structures in small animals. Consequently, biomedical research groups and pharmaceutical companies are interested in running dedicated high-resolution small animal PET scanners. We describe the development and the performance measurements of an optimized LSO/LuYAP phoswich detector head for the ClearPET demonstrator, which Manuscript
IEEE Nuclear Science Symposium Conference Record, 2005
The ClearPET™ Neuro is the first full ring scanner within the Crystal Clear Collaboration (CCC). ... more The ClearPET™ Neuro is the first full ring scanner within the Crystal Clear Collaboration (CCC). It consists of 80 detector modules allocated to 20 cassettes. LSO and LuYAP:Ce crystals in phoswich configuration in combination with position sensitive photomultiplier tubes are used to achieve high sensitivity and realize the acquisition of the depth of interaction (DOI) information. The complete system has
Le Musée de physique de l'Université de Lausanne: – Bref historique de l'Académie de Laus... more Le Musée de physique de l'Université de Lausanne: – Bref historique de l'Académie de Lausanne – Présentation du Musée – Quelques instruments remarquable
Born near Zurich, Heinrich Wild studied physics and became in 1858 professor at the University of... more Born near Zurich, Heinrich Wild studied physics and became in 1858 professor at the University of Bern. In 1868, he was called to the direction of the Central Physical (Meteorological) Observatory in Saint Petersburg. During his 27 years in Russia, he was busy studying meteorology and terrestrial magnetism, enormously extending the network of observing stations in Russia, publishing results, working on the improvement and standardisation of meteorological instruments and actively participating in international conferences. He was also concerned with the standardisation of weights and measures. Still at Bern in 1864, he used the very sensitive Savart polariscope to produce his “Polaristrobometer”, the first practical and commercially successful polarimeter/saccharimeter using monochromatic light. It remained one of the most sensitive instruments until the beginning of the 20th c. After his retirement to Zurich in 1895, Wild was again trying to improve it.
Physical Review C, 1979
ABSTRACT
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1990
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Papers by Jean-François LOUDE
They were developed and built by Erhard Mettler in collaboration with Hans Meier. They dominated the market for analysis balances, until they were replaced, from about 1975, by electronic models.