"Real-Life" Pulse Flattening on the LLNL Flash X-Ray (FXR) Machine

DeHope, W.J.; Jacob, J.; Kreitzer, Blake R.; Kihara, R.; Ong, M M; Zentler, J.

doi:10.1109/ppps.2007.4346061

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Efforts to improve FXR beam quality and accelerator reliability have continued [80][81][82][83][84][85][86][87]. They include retuning the LIA to minimize emittance growth [84] and further reducing the temporal variation of the energy, thereby reducing the corkscrew [83,86].…”

Section: Fxrmentioning

confidence: 99%

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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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Section: Fxrmentioning

confidence: 99%

“…They include retuning the LIA to minimize emittance growth [84] and further reducing the temporal variation of the energy, thereby reducing the corkscrew [83,86]. Many of the FXR beam optimization experiments have been made possible through implementation of advanced beam diagnostics [80][81][82]84].…”

Section: Fxrmentioning

confidence: 99%