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Publications (4)0.87 Total impact

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    ABSTRACT: The Sphinx machine developed at the Centre d'Etudes de Gramat is based on the 1-mus linear-transformer-driver (LTD) technology. Before 2006, it operated with 16 branches of eight LTD stages each and was used for implosion of Z-pinch loads in direct drive mode. At a charging voltage of 50 kV, the stored energy was 1.3 MJ, and the good reliability of the machine allowed many experiments on 4-MA 700-ns implosion of nested wire arrays. Parallel to these experiments, improvements on LTD stages have been achieved on test beds up to 70-kV charging voltage, leading to a new design of LTD stage, named LTD-05. The Sphinx machine has been upgraded with 144 such LTD-05 stages. Details are given on stage design, on electrical and electrostatic simulations, and on experimental results. The following subsystems modifications or developments are also described: (1) premagnetizing and triggering systems and (2) prepulse current generator for wire-array preheating. Moreover, a status on improved performances and reliability of the complete Sphinx system is given.
    IEEE Transactions on Plasma Science 05/2008; · 0.87 Impact Factor
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    ABSTRACT: The SPHINX machine developed at Centre d’Etudes de Gramat is based on the 1 microsecond LTD technology. Before 2006, it operated with 16 branches of 8 LTD stages each and was used for implosion of Z-pinch loads in direct drive mode. At a charging voltage of 50kV, the stored energy was 1.3MJ and the good reliability of the machine allowed many experiments on 4MA, 700ns implosion of nested wire-arrays [1]. Parallel to these experiments, improvements on LTD stages have been achieved on test-beds up to 70kV charging voltage, leading to a new design of LTD stage, named LTD-05. Sphinx machine has been upgraded with 144 such LTD-05 stages. Details are given on stage design, on electrical and electrostatic simulations and on experimental results. Several sub-systems modifications or developments are also described : pre-magnetizing and triggering systems, prepulse current generator for wire-array pre-heating and a status on improved performances and reliability of the complete Sphinx system is given.
    Pulsed Power Conference, 2007 16th IEEE International; 07/2007
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    ABSTRACT: Summary form only given. The SPHINX machine developed at Centre d'Etudes de Gramat is based on the 1 microsecond LTD technology. Before 2006 it operated with 16 branches of 8 LTD stages each and was used for implosion of Z-pinch loads in direct drive mode. At a charging voltage of 50 kV the stored energy was 1 MJ and the level of reliability of the machine allowed for many experiments on 4 MA, 800 ns implosion of nested wire arrays. Parallel to these experiments, improvements on LTD stages have been achieved on test-beds up to 70 kV charging voltage, leading to a new design of LTD stage, named LTD05. The SPHINX machine has been upgraded with 144 such LTD05 stages. Details are given on LTD05 design, on electrical and electrostatic simulations and on experimental results. Several sub-systems modifications or developments are also described: premagnetizing and triggering systems, prepulse current generator for wire-array pre-heating, and a status on improved performance and reliability of the complete SPHINX system is given.
    Plasma Science, 2007. ICOPS 2007. IEEE 34th International Conference on; 07/2007
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    ABSTRACT: The SPHINX machine developped at Centre d'Etudes de Gramat (CEG) is based on the 1 microsecond LTD technology. Since May 2004, it operates with 16 branches of 8 LTD stages each and is used for implosion of Z-pinch loads in direct drive mode. At a charging voltage of 50kV, the stored energy is 1.3MJ and the machine has shown a very good reliability which allowed every ex-periment on ~4MA, ~700ns implosion of nested wire-arrays described in references [3] to [5]. Par-allel to these experiments, improvements on LTD stages have been achieved on test-beds up to 70kV charging voltage, leading to a new design of stages, named LTD05. Sphinx machine has been upgraded with 128 such LTD05 stages in October 2005. De-tails are given on LTD05 design, on electrical and electrostatic simulations and on experimental re-sults. Other modifications on premagnetizing and triggering systems are described and a status on improved performances and reliability of the com-plete Sphinx system is given.
    01/2006;