RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Acceleration of a suborbital payload using an electromagnetic railgun

Auteur(s) / Author(s)

LEHMANN P. (1) ; RECK B. (1) ; VO M. D. (1) ; BEHRENS J. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) French-German Research Institute of Saint-Louis, 68301 Saint Louis, FRANCE
(2) EADS Space Transportation-Strategy and Business Development-New Projects, 28361 Bremen, ALLEMAGNE

Résumé / Abstract

Railguns are well-known for their capability to reach very high velocities (vo > 2000 m/s) with overall efficiencies (Ekinetic /Eelectric over 30%. The high performance expected concerning velocity, efficiency, cost, and repetition rates makes this system attractive not only for military but also for space applications with the aim of accelerating lightweight payloads directly into the low earth orbit (500 km) This last application is very challenging, as far as the energy and power storage, the railgun length, and the rail materials are concerned but seems promising. In a first step towards space launch, ISL and EADS have investigated, within the scope of two ESA financed studies the possibility of using a railgun to replace a sounding rocket with the aim of accelerating a meteorological probe up to an apogee ol 120 km. In this paper, a quantitative assessment of the concept of the railgun, coupled to the object to be accelerated, is proposed. Th< electric circuit necessary to drive the facility is given: electric energy sources, switches, pulse forming network as well as a first layout of the railgun itself (length, caliber, materials), and of its current injection points. A series of preliminary test shots of dummy projectiles with masses ranging from 1 to 4 kg using the existing PEGASUS railgun facility at ISL is reported. The projectiles were launched reliably and in a reproducible way with accelerations not exceeding 13000 g, except for one shot with the 2-kg projectile fired with an acceleratior of 15700 g, thus, reproducing the suborbital launch conditions. A first estimation of how to delay the plasma occurrence of the sliding armatures used for the suborbital applications at low accelerations is also given in this paper.

Revue / Journal Title

IEEE transactions on magnetics    ISSN  0018-9464   CODEN IEMGAQ 

Source / Source

Congrès
International symposium on electromagnetic launch technology No13, Postdam , ALLEMAGNE (22/05/2006)
2007, vol. 43 (2), no 1 (421 p.)  [Document : 6 p.] (18 ref.), [Notes: Selected papers], pp. 480-485 [6 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Institute of Electrical and Electronics Engineers, New York, NY, ETATS-UNIS  (1965) (Revue)

Mots-clés anglais / English Keywords

Electromagnetic launchers

;

Proceedings

;

Launching

;

Rail

;

Military application

;

Electromagnetic device

;

Mots-clés français / French Keywords

Lanceur électromagnétique

;

Actes congrès

;

Lancement

;

Rail

;

Application militaire

;

Dispositif électromagnétique

;

Mots-clés espagnols / Spanish Keywords

Ponencia congreso

;

Lanzamiento

;

Riel (vía férrea)

;

Aplicación militar

;

Dispositivo electromagnético

;

Mots-clés d'auteur / Author Keywords

Earth-to-space launch

;

meteorological probe

;

railgun

;

Localisation / Location

INIST-CNRS, Cote INIST : 222 H6, 35400014518618.0820

Nº notice refdoc (ud4) : 18389953



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas