X-ray diagnostics for the single shot laboratory gun

Hotz, T.J.; Hahne, J.J.

doi:10.1109/20.195748

Cited by 3 publications

(1 citation statement)

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“…Flash x-ray radiography has been shown to be a useful and, under peculiar conditions, a unique investigative tool to study high-speed phenomena [1]. Flash x-ray radiography or flash x-ray cineradiography are widely used in ballistics experiments [2,3] or for the characterization of detonation phenomena [4]. These x-ray based techniques appeared especially powerful when light scattering, bright-light emission, light absorption or reflection etc occur in the surroundings of the 'object' under study.…”

Section: Introductionmentioning

confidence: 99%

Flash x-ray radiography of argon jets in ambient air

Geiswiller

Robert

Huré

et al. 1998

Meas. Sci. Technol.

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This paper describes the development and application of a soft x-ray flash radiography technique. A very compact soft x-ray flash source has been specially designed for these studies. The table-top x-ray source developed in this work emits strong doses, up to one roentgen at the output window, of x-ray photons, with most of them in the characteristic lines of the anode material (photon energy in the energy range 5-10 keV), in pulse of 20 ns FWHM with an x-ray emission zone smaller than . All these characteristics make this source attractive for the x-ray radiography of high-speed phenomena, down to ten nanoseconds duration and/or for the media presenting weak absorption for the harder x-ray photons emitted by more conventional flash x-ray systems. Argon streams in ambient air were chosen as a typical case to enlighten the potentialities of this method. Single-shot radiographs of such an argon jet through rectangular nozzles were obtained. No attempt of quantitative measurement of local density in the argon stream has yet been performed, only the qualitative structure of the jet has been investigated. Nevertheless, these preliminary results enable us to state that the diagnostics of gaseous or plasma media, even at rather low pressures, can proceed using soft x-ray flash radiography.

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Section: Introductionmentioning

confidence: 99%

Flash x-ray radiography of argon jets in ambient air

Geiswiller

Robert

Huré

et al. 1998

Meas. Sci. Technol.

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Operating experience with the 90 mm railgun at CEM-UT

Hahne¹,

Hayes²

1993

IEEE Trans. Magn.

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Date Fwk Fmjectile Velocity Enerey TypofFm@%Ik W t Mass(W (Ws) 0 (MA)ABSTRACT: The Center for Electromechanics at The University of Texas at Austin (CEM-UT) has operated its 90 mm x 10 m long railgun with great success and several recently added improvements. The testing has involved various types of projectile packages, including split armature designs for mid-body drive projectiles as well as base-push packages.CEM-UT has performed an 8.1 MJ experiment as well as many lower energy tests as part of the ongoing armature/projectile development program. One of the most important features added to the system was the development of thermal opening switches for smoother commutation into the gun and reduced acceleration loads on delicate projectile packages. Other new features include a copper vapor laser for enhanced high speed film data and a target x-ray system for capturing projectile data just before and after impacting the target. Both the copper vapor laser and the target-rays add to the excellent data collection and shot evaluation system in place at CEM-UT. This paper presents test results to date, a discussion on improvements to the system, and comments on future plans and capabilities of the large bore railgun program. 2/22/90 31)4 244 2,571 8.1 C-slnpedalumhum 1/8/91 3.12 23 2,033 4.7RcduoedmwCBM-UTCshaped more compliurt, aluminum urmtun

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Railgun instrumentation

Hotz

Davis

1995

IEEE Trans. Magn.

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X-ray diagnostics for the single shot laboratory gun

Cited by 3 publications

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Flash x-ray radiography of argon jets in ambient air

Flash x-ray radiography of argon jets in ambient air

Operating experience with the 90 mm railgun at CEM-UT

Railgun instrumentation

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