Tuner: a tool for designing and optimizing ion optical systems

Designing and optimizing ion optical systems is often a complex and difficult task, which requires the use of computational tools to iterate and converge towards the desired characteristics and performances of the system. Very often these tools are not well adapted for exploring the numerous degrees of freedom, rendering the process long and tedious, as well as somewhat random due to the very large number of local minima typically found when looking for a particular optical solution. This paper presents a novel approach to finding the desired solution of an optical system, by providing the user with an instant feedback of the effects of changing parameters. The process of finding an approximate solution by manually adjusting parameters is greatly facilitated, at which point the final tune can be calculated by minimization according to a number of constraints.Comment: 15 pages, 6 figures, to be published in Nuclear Instruments and Methods

Neutron Correlations in the Decay of the First Excited State of 11Li

The decay of unbound excited 11Li was measured after being populated by a two-proton removal from a 13B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the 9Li fragment and neutrons. A resonance at an excitation energy of ∼1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded

Surveillance et contrôle des activités des navires en mer = Surveillance and Control of Vessel's Activities at Sea

Dossier : La sécurité globale. Menaces et réponses. Article disponible sur cette page = http://www.irit.fr/scanmaris/index.php?page=publicationsNational audienceTo guarantee good security conditions in the French national water and exclusive economic zone, the surveillance system is optimised in using various facilities: CROSS (Regional Operational Centres), a network of coastal semaphores, vessels and aircrafts from maritime administrations.. But information are acquired only over limited areas or time periods.Thus, the next solutions shall be global and permanent, and shall process all available information to better manage and control all activities at sea. To best achieve this global surveillance of wide maritime areas without constraining the free access and commercial activities, tools are to be developed to automatically combine and process various types of information collected to continuously monitor the ship's traffic, the good flows and to detect criminal activities and threats (illicit goods flows, clandestine immigrants, piracy, accidents, etc.), and regulation violations

Surveillance et contrôle des activités des navires en mer (REE nov. 2007)

Dossier : La sécurité globale. Menaces et réponses. Article disponible sur cette page = http://www.irit.fr/scanmaris/index.php?page=publicationsNational audienceTo guarantee good security conditions in the French national water and exclusive economic zone, the surveillance system is optimised in using various facilities: CROSS (Regional Operational Centres), a network of coastal semaphores, vessels and aircrafts from maritime administrations.. But information are acquired only over limited areas or time periods.Thus, the next solutions shall be global and permanent, and shall process all available information to better manage and control all activities at sea. To best achieve this global surveillance of wide maritime areas without constraining the free access and commercial activities, tools are to be developed to automatically combine and process various types of information collected to continuously monitor the ship's traffic, the good flows and to detect criminal activities and threats (illicit goods flows, clandestine immigrants, piracy, accidents, etc.), and regulation violations