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Accueil > A propos du LPP > Communication > Actualités archivées > 2013 > The world’s highest current on a ns university generator at Reno, NV, thanks to a device invented in LPP

The world’s highest current on a ns university generator at Reno, NV, thanks to a device invented in LPP

During the years 2010-2013, a new High Pulsed Power (HPP) concept suggested by A. Chuvatin from LPP [Chuvatin et al, Phys. Rev. ST 2010] called LCM (Load Current Multiplier) was validated and improved with participation of LPP in the group of Prof. V. Kantsyrev on the Zebra HPP generator at the University of Nevada Reno (left image). The pulsed current produced by Zebra was increased from its nominal value of 0.9-1 MA (central image) to 1.4-1.6 MA (in LCM regime) and then to 1.6-1.9 MA (with upgraded LCM). As a result, specific X-ray energy and power produced by z-pinch plasmas were typically tripled. These results are obtained without modifying the stored energy and generator architecture : the latter did not change outwardly with the last improved LCM. Zebra thus becomes the world’s highest-current university-based nanosecond HPP accelerator.


The LCM on Zebra made it also possible to drive two symmetrical X-ray radiators in parallel and to conduct first-ever experiments on hohlraums in a university laboratory [Kantsyrev et al, ICOPS 2012] (right image). Successful validation of the LCM concept on a high-voltage nanosecond (≤ 100 ns) generator having the same architecture as Z machine at Sandia, allows to consider higher generator-to-target energy transfer efficiencies on future thermonuclear HPP facilities as those suggested in Stygar et al, [Phys. Rev. ST 2007].


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Tutelles : CNRS Ecole Polytechnique Sorbonne Université Université Paris Sud Observatoire de Paris Convention : CEA
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Exploitant du site : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Hébergeur : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Directeur de la publication : Pascal Chabert (Directeur)