1,176 research outputs found
Medium energy beam facility at GANIL
http://accelconf.web.cern.ch/AccelConf/c89/papers/f7-03.pdfInternational audienc
Beam transmission efficiency between injector and target in the GANIL complex
http://accelconf.web.cern.ch/AccelConf/c84/papers/j22.pdfInternational audienceIn order to achieve a maximum transmission efficiency, efforts have been made in three directions : beam measurements, understanding of the physical phenomenon, tuning method. The characteristics of the beam extracted from the three cyclotrons have been measured. The ensuing optical effects are analysed. The tuning of the transport-lines, depending on the characteristics of the extracted beams and the required beam properties on the target, is described
UK utility data integration: overcoming schematic heterogeneity
In this paper we discuss syntactic, semantic and schematic issues which inhibit the integration of utility data in the UK. We then focus on the techniques employed within the VISTA project to overcome schematic heterogeneity. A Global
Schema based architecture is employed. Although automated approaches to Global Schema definition were attempted
the heterogeneities of the sector were too great. A manual approach to Global Schema definition was employed. The
techniques used to define and subsequently map source utility data models to this schema are discussed in detail. In order to ensure a coherent integrated model, sub and cross domain validation issues are then highlighted. Finally the proposed framework and data flow for schematic integration is introduced
Six-dimensional beam matching for axial injection into a cyclotron
http://accelconf.web.cern.ch/AccelConf/c89/papers/g1-01.pdfInternational audienc
Parameters of the eigenellipsoid for separated sector cyclotron
http://accelconf.web.cern.ch/AccelConf/c89/papers/g1-09.pdfInternational audienc
On the Cut-Off Prescriptions Associated with Power-Law Generalized Thermostatistics
We revisit the cut-off prescriptions which are needed in order to specify
completely the form of Tsallis' maximum entropy distributions. For values of
the Tsallis entropic parameter we advance an alternative cut-off
prescription and discuss some of its basic mathematical properties. As an
illustration of the new cut-off prescription we consider in some detail the
-generalized quantum distributions which have recently been shown to
reproduce various experimental results related to high superconductors
The GANIL beam lines
http://accelconf.web.cern.ch/AccelConf/c81/papers/ep-36.pdfInternational audienceThe general optical functions of the beam lines are described. The principle of beam lines composed of sections with separated functions was adopted. The main technological characteristics of the equipments (guiding system, buncher, stripper, beam diagnostics and pumping system) are given
High intensity and space charge problems at GANIL
http://accelconf.web.cern.ch/AccelConf/c86/papers/g-04.pdfInternational audienceWe routinely accelerate up to micro-amperes of ionsat energies ranging from 25 to 95 MeV / A. Already atthese levels, space charge (S.C) problems drasticallyaffect the bunching efficiency between the ECRexternal ion-source and our Co compact injector.Moreover in the "2.5" version of GANIL we expectcurrents above 50 e\l A (Ar+6 for instance) and S.Ceffects will be of prime importance during accelerationin the injector and even in our first SSC. Wepresent our computer codes and our first results
Werner states and the two-spinors Heisenberg anti-ferromagnet
We ascertain, following ideas of Arnesen, Bose, and Vedral concerning thermal
entanglement [Phys. Rev. Lett. {\bf 87} (2001) 017901] and using the
statistical tool called {\it entropic non-triviality} [Lamberti, Martin,
Plastino, and Rosso, Physica A {\bf 334} (2004) 119], that there is a one to
one correspondence between (i) the mixing coefficient of a Werner state, on
the one hand, and (ii) the temperature of the one-dimensional Heisenberg
two-spin chain with a magnetic field along the axis, on the other one.
This is true for each value of below a certain critical value . The
pertinent mapping depends on the particular value one selects within such a
range
Preliminary design of a new high intensity injection system for GANIL.
http://accelconf.web.cern.ch/AccelConf/c89/papers/f6-12.pdfInternational audienc
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