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- W1667508780 abstract "Summary form only given. The major target issues concerning the multiple-exposure intense electron-beam radiography are: (I) To limit the expansion of the plasma plume from the X-ray converter target. (II) To limit the distance traveled upstream by the ions from the target along the beam. This is because substantial plasma plume expansion can reduce the X-ray output dose and uncontrolled backstreaming ions can cause neutralization of the e-beam and thus the beam may not be tightly focused on the target. We present two target configurations based on LASNEX simulations that address these two target issues. 1. Multi-foil targets: Dividing a solid target into many thin foils over a longer length can lengthen the disintegration time of the target and reduces the expansion of the plasma plume. This improves the production of the X-ray dose. We will present the LASNEX simulations of the target expansion. 2. Pellicle dynamics: Placing a pellicle in front of the target can confine the backstreaming ions to a shorter channel so that the cumulative effect on e-beam focusing is reduced. We will present the simulation for hydrodynamic expansion, caused by e-beam heating, of the pellicles. We have studied pellicles made of various materials. Both single-layered and multilayered pellicles have been investigated. Simulations show that the range (/spl rho/r) of the pellicles along the axis remains essentially constant. Therefore, all the pellicles studied here should be able to stop backstreaming ions." @default.
- W1667508780 created "2016-06-24" @default.
- W1667508780 creator A5034532109 @default.
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- W1667508780 date "2002-11-07" @default.
- W1667508780 modified "2023-09-26" @default.
- W1667508780 title "Multi foil targets and pellicle dynamics for X-ray radiography" @default.
- W1667508780 doi "https://doi.org/10.1109/plasma.2000.855166" @default.
- W1667508780 hasPublicationYear "2002" @default.
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