Hydrodynamic Expansion of Pellicles Caused by e-Beam Heating
Abstract
Placing a pellicle in front of a x-ray converter target for radiographic applications can confine the backstreaming ions and target plasma to a shorter channel so that the cumulative effect on e-beam focusing is reduced. The pellicle is subject to heating by e-beam since the pellicle is placed upstream of the target. The calculation of the hydrodynamic expansion, caused by the heating, using the radiation hydrodynamics code LASNEX is presented in this report. Calculations show that mylar pellicles disintegrate at the end of a multi-pulse intense e-beam while beryllium and carbon pellicles remain intact. The expansions for the kapton-carbon multi-layered targets are also examined. Hydrodynamic expansions for pellicles with various e-beam spot radii are calculated for DARHT-II beam parameters. All the simulation results indicate that the backstreaming ions can be stopped.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE Office of Defense Programs (DP) (US)
- OSTI Identifier:
- 792635
- Report Number(s):
- UCRL-ID-137358
TRN: US0301489
- DOE Contract Number:
- W-7405-Eng-48
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: 1 Feb 2000
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE; BERYLLIUM; CARBON; FOCUSING; ELECTRON BEAMS; HEATING; HYDRODYNAMICS; MYLAR; COMPUTERIZED SIMULATION; X-RAY RADIOGRAPHY; ACCELERATOR FACILITIES; THERMAL EXPANSION
Citation Formats
Ho, D. Hydrodynamic Expansion of Pellicles Caused by e-Beam Heating. United States: N. p., 2000.
Web. doi:10.2172/792635.
Ho, D. Hydrodynamic Expansion of Pellicles Caused by e-Beam Heating. United States. https://doi.org/10.2172/792635
Ho, D. 2000.
"Hydrodynamic Expansion of Pellicles Caused by e-Beam Heating". United States. https://doi.org/10.2172/792635. https://www.osti.gov/servlets/purl/792635.
@article{osti_792635,
title = {Hydrodynamic Expansion of Pellicles Caused by e-Beam Heating},
author = {Ho, D},
abstractNote = {Placing a pellicle in front of a x-ray converter target for radiographic applications can confine the backstreaming ions and target plasma to a shorter channel so that the cumulative effect on e-beam focusing is reduced. The pellicle is subject to heating by e-beam since the pellicle is placed upstream of the target. The calculation of the hydrodynamic expansion, caused by the heating, using the radiation hydrodynamics code LASNEX is presented in this report. Calculations show that mylar pellicles disintegrate at the end of a multi-pulse intense e-beam while beryllium and carbon pellicles remain intact. The expansions for the kapton-carbon multi-layered targets are also examined. Hydrodynamic expansions for pellicles with various e-beam spot radii are calculated for DARHT-II beam parameters. All the simulation results indicate that the backstreaming ions can be stopped.},
doi = {10.2172/792635},
url = {https://www.osti.gov/biblio/792635},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 01 00:00:00 EST 2000},
month = {Tue Feb 01 00:00:00 EST 2000}
}