Ion Effects in the DARHT-II Downstream Transport

Chan, K.C.D.; Davis, H.A.; Ekdahl, C.A.; Schulze, Martin; Hughes, T.P.; Genoni, T. C.

doi:10.1109/pac.2005.1590439

Cited by 4 publications

(2 citation statements)

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“…A similar conclusion is given in Ref. [11]. Since the DARHT-II accelerator will deliver a beam with a long beam head, the downstream transport line is designed to have a large beam acceptance.…”

Section: A Background Gassupporting

confidence: 76%

Scaled Accelerator Test For the DARHT-II Downstream Transport System

Chen

Blackfield

Caporaso

et al. 2005

2005 IEEE Pulsed Power Conference

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The second axis of the Dual Axial radiography Hydrodynamic Test (DARHT-II) facility at LANL is currently in the commissioning phase [1]. The beam parameters for the DARHT-II machine will be nominally 18 MeV, 2 kA and 1.6 µs. this makes the DARHT-II downstream system the first system ever designed to transport a high current, high energy and long pulse beam [2]. We will test these physics issues of the downstream transport system on a scaled DARHT-II accelerator with a 7.8-MeV and 660-A beam at LANL before commissioning the machine at its full energy and current. The scaling laws for various physics concerns and the beam parameters selection is discussed in this paper.

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Section: A Background Gassupporting

confidence: 76%

Scaled Accelerator Test For the DARHT-II Downstream Transport System

Chen

Blackfield

Caporaso

et al. 2005

2005 IEEE Pulsed Power Conference

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“…After exiting the LIA, the long pulse is sliced into four shorter pulses by a fast kicker system in the downstream transport (DST), with the un-kicked beam diverted to an offline dump [122][123][124][125][126][127][128][129][130]. The durations of the kicked pulses are individually programmable, from 20 ns to >100 ns, and this feature is used to tune the individual doses to the dynamic experiment.…”

Section: Darht Axis-iimentioning

confidence: 99%

Particle Beam Radiography

Peach

Ekdahl

2013

Rev. Accl. Sci. Tech.

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Particle beam radiography, which uses a variety of particle probes (neutrons, protons, electrons, gammas and potentially other particles) to study the structure of materials and objects noninvasively, is reviewed, largely from an accelerator perspective, although the use of cosmic rays (mainly muons but potentially also high-energy neutrinos) is briefly reviewed. Tomography is a form of radiography which uses multiple views to reconstruct a three-dimensional density map of an object. There is a very wide range of applications of radiography and tomography, from medicine to engineering and security, and advances in instrumentation, specifically the development of electronic detectors, allow rapid analysis of the resultant radiographs. Flash radiography is a diagnostic technique for large high-explosive-driven hydrodynamic experiments that is used at many laboratories. The bremsstrahlung radiation pulse from an intense relativistic electron beam incident onto a high-Z target is the source of these radiographs. The challenge is to provide radiation sources intense enough to penetrate hundreds of g/cm 2 of material, in pulses short enough to stop the motion of high-speed hydrodynamic shocks, and with source spots small enough to resolve fine details. The challenge has been met with a wide variety of accelerator technologies, including pulsed-power-driven diodes, air-core pulsed betatrons and high-current linear induction accelerators. Accelerator technology has also evolved to accommodate the experimenters' continuing quest for multiple images in time and space. Linear induction accelerators have had a major role in these advances, especially in providing multiple-time radiographs of the largest hydrodynamic experiments.

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