NAPAC2019 - List of Authors (Chen, Y.-J.)

Paper	Title	Page
WEPLE09	Mitigation of Nonlinear Phase Space in a Space-Charge-Limited Injector Diode	905
	W.D. Stem, Y.-J. Chen, J. Ellsworth LLNL, Livermore, California, USA
	Funding: This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. The performance of an accelerator is limited by the quality of the beam produced at the injector. For a Pierce-type diode structure, the cathode-shroud interface and the anode pipe entrance are sources for undesired, irreversible phase space nonlinearities that lead to emittance growth. In this contribution, we present ways to mitigate these nonlinearities by adjusting the cathode-shroud interface to meet the beam edge boundary conditions and by adjusting the solenoidal focusing magnet in the diode region such that the nonlinear focusing magnetic fringe fields compensate the nonlinear defocusing electrical fields of the anode pipe entrance.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2019-WEPLE09
About •	paper received ※ 05 September 2019 paper accepted ※ 04 December 2019 issue date ※ 08 October 2019
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THYBA2	Multi-Pulse Scorpius Linear Induction Accelerator for Flash X-Ray Radiography
	N. Pogue, Y.-J. Chen LLNL, Livermore, California, USA M.T. Crawford, D.J. Funk LANL, Los Alamos, New Mexico, USA
	The Scorpius electron linear induction accelerator is currently being developed for NNSA stockpile stewardship’s Enhanced Capabilities for Subcritical Experiments (ECSE) Program. The purpose is to provide multiple x-ray pulses for flash radiography of large hydrodynamic experiments driven by high explosive. The Scorpius accelerator is designed to produce four 90-ns, 2-kA, 20-MeV electron pulses with the inter-pulse separation varying from 100 ns to 900 ns. The exiting electron pulses will be focused onto a high-Z target to produce the needed radiographic x-ray sources. The ECSE Scorpius project is managed at Los Alamos National Laboratory with cooperation from Lawrence Livermore National Laboratory, Sandia National Laboratory and Nevada National Security Site. Currently, the project completion date is set for 2024. This presentation will cover Scorpius accelerator’s development status.
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Paper

Title

Page

Mitigation of Nonlinear Phase Space in a Space-Charge-Limited Injector Diode

905

W.D. Stem, Y.-J. Chen, J. Ellsworth
LLNL, Livermore, California, USA

Funding: This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
The performance of an accelerator is limited by the quality of the beam produced at the injector. For a Pierce-type diode structure, the cathode-shroud interface and the anode pipe entrance are sources for undesired, irreversible phase space nonlinearities that lead to emittance growth. In this contribution, we present ways to mitigate these nonlinearities by adjusting the cathode-shroud interface to meet the beam edge boundary conditions and by adjusting the solenoidal focusing magnet in the diode region such that the nonlinear focusing magnetic fringe fields compensate the nonlinear defocusing electrical fields of the anode pipe entrance.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2019-WEPLE09

About •

paper received ※ 05 September 2019 paper accepted ※ 04 December 2019 issue date ※ 08 October 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THYBA2

Multi-Pulse Scorpius Linear Induction Accelerator for Flash X-Ray Radiography

N. Pogue, Y.-J. Chen
LLNL, Livermore, California, USA
M.T. Crawford, D.J. Funk
LANL, Los Alamos, New Mexico, USA

The Scorpius electron linear induction accelerator is currently being developed for NNSA stockpile stewardship’s Enhanced Capabilities for Subcritical Experiments (ECSE) Program. The purpose is to provide multiple x-ray pulses for flash radiography of large hydrodynamic experiments driven by high explosive. The Scorpius accelerator is designed to produce four 90-ns, 2-kA, 20-MeV electron pulses with the inter-pulse separation varying from 100 ns to 900 ns. The exiting electron pulses will be focused onto a high-Z target to produce the needed radiographic x-ray sources. The ECSE Scorpius project is managed at Los Alamos National Laboratory with cooperation from Lawrence Livermore National Laboratory, Sandia National Laboratory and Nevada National Security Site. Currently, the project completion date is set for 2024. This presentation will cover Scorpius accelerator’s development status.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)