Technical aspects of railguns

Peter, H.; Jamet, F.; Wegner, V.

doi:10.1109/20.364663

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…Next, total value of ' B is determined properties of the rail conductors as given by ) , (8) )⋅ (12) thickness of the er the assumption hod is used, these and, Monte Carlo method is not as fast as (12). Both methods give similar results.…”

Section: A Armaturementioning

confidence: 99%

Implementation of monte carlo method to an electromagnetic launcher simulator

Şengil

2012

2012 16th International Symposium on Electromagnetic Launch Technology

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In future, electromagnetic launchers are considered for transporting payloads to the space. Although many developments are achieved, still some technological barriers exist. Further studies are required to overcome these challenges. To develop electromagnetic launchers require experimental and theoretical studies in addition to the simulations. In this study an electromagnetic launcher is simulated. During simulation, magnetic flux density and self-induction are calculated using Monte Carlo methods. Following, these values are used to solve coupled equations of motion and electric circuit. Finally, this study ends with the presentation of the current and velocity profiles in the time domain.

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Section: A Armaturementioning

confidence: 99%

Implementation of monte carlo method to an electromagnetic launcher simulator

Şengil

2012

2012 16th International Symposium on Electromagnetic Launch Technology

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“…In order to insure the electrical insulation between the rails and the connecting parts, two GRP layers have been put outside and inside the CRP (Fig. 3) [4].…”

Section: B Railgun Housing and Electrical Connection Ringsmentioning

confidence: 99%

First experimental results with the ISL 10 MJ DES railgun PEGASUS

2001

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A 10 MJ DES railgun with 12 current inputs distributed along the 50-mm round bore launcher has been built at ISL. The power supply consists of 200 LCR Pulse Forming Units of 50 kJ each. The 6-m-long launcher tube containing the Cu-Cr rails is made of both wound glass fiber and wound carbon fiber reinforced plastic.This paper presents the facility and the first experimental results obtained by using projectiles made of Ti or equipped with metallic fiber-brush armatures. The triggering of the 12 DES stages is synchronized with the position of the projectile detected by -dot probes located along the launcher tube. The currents delivered by the stages are measured by means of Rogowski coils surrounding the injection slots. The maximum total current reaches 2 MA resulting from the addition of the 12 current profiles of 800 kA delivered by each stage of the DES energy supply. The launcher has proved to have an overall efficiency of about 30%. Projectiles with masses ranging from 300 g to 650 g have been accelerated up to velocities of 2300 m/s. The quality of the electrical contact between rails and armature has been analyzed by electrical measurements and flash radiographs.

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“…The energy source for a larger railgun, PEGASUS, is a capacitor bank of 2.77 MJ divided into two modules that give peak currents of 1.4 MA and 1.2 MA, respectively, with a switching time difference of 350 p. The efficiency for a railgun of 50-mm caliber and 3 m in length, which will accelerate 100-g projectiles to 4 to 5 km/s, was predicted as 30 percent. With a pre-accelerator that combines ET and VII-9 EM principles, an energy input of 150 kJ is expected to be capable of accelerating a 100-g projectile to 400 m/s in a 0.3-m length (Peter et al, 1994). Experiments with a DES (distributed energy store) railgun have been conducted with this bank in which the second part of the capacitor bank is triggered by the passage of the projectile, which has a special design to achieve good electrical contact with the rails.…”

Section: Vii-8mentioning

confidence: 99%