• Corpus ID: 118843437

Beam Dynamics for the Scopius Conceptual Design Report

  title={Beam Dynamics for the Scopius Conceptual Design Report},
  author={Carl August Jr. Ekdahl},
  journal={arXiv: Accelerator Physics},
  • C. Ekdahl
  • Published 31 October 2017
  • Physics
  • arXiv: Accelerator Physics
Scorpius is a new multi-pulse linear induction accelerator (LIA). It is presently planned for Scorpius to accelerate four 2-kA electron pulses to 20 MeV from an injected energy of 2 MeV. The goal of Scorpius is to deliver a multi-pulse electron beam with quality sufficient for use in flash radiography of large-scale explosively-driven experiments. Beam physics has a profound effect on the quality of multi-pulse radiographs. Beam halo or asymmetry causes emittance growth, which enlarges spot… 

Cathode to Target Simulations for Scorpius: I. Simulation Codes and Models

The new Scorpius linear induction electron accelerator is under development for multi-pulse flash radiography of large, explosively-driven hydrodynamic experiments. Beam physics from the cathode to

The Ion-Hose Instability in a High-Current Multipulse Linear Induction Accelerator

  • C. Ekdahl
  • Physics
    IEEE Transactions on Plasma Science
  • 2019
The ion-hose instability is considered to be a potential danger for long-pulse, high-current electron linear induction accelerators (LIAs). As is shown in this paper, it is also a concern for

Генерация импульсов сверхизлучения терагерцового диапазона в процессе вынужденного рассеяния лазерного излучения на попутном сильноточном релятивистском электронном пучке

Анализируется возможность генерации импульсов сверхизлучения терагерцового диапазона при попутном рассеянии лазерного импульса на сильноточном релятивистском электронном пучке с преобразованием


The ion-hose instability has usually been considered a danger for long-pulse, high-current electron linear induction accelerators (LIAs). However, it is also a concern for multi-pulse LIAs. We have



Simulation results of corkscrew motion in DARHT-II

DARHT-II, the second axis of the Dual-Axis Radiographic Hydrodynamics Test Facility, is being commissioned. DARHT-II is a linear induction accelerator producing 2-microsecond electron beam pulses at

Tuning the DARHT Long-Pulse Linear Induction Accelerator

  • C. Ekdahl
  • Physics
    IEEE Transactions on Plasma Science
  • 2013
Flash radiography of large hydrodynamic experiments driven by high explosives is a well-known diagnostic technique in use at many laboratories. The Dual-Axis Radiography for Hydrodynamic Testing


The DARHT-2 (Dual-Axis Radiographic Hydrodynamics Test) facility is expected to produce a 2kA, 20-MeV, 2-μs flattop electron beam pulse. Normal operation requires that the beam exit the accelerator

Emittance Growth in the DARHT-II Linear Induction Accelerator

The dual-axis radiographic hydrodynamic test (DARHT) facility uses bremsstrahlung radiation source spots produced by the focused electron beams from two linear induction accelerators (LIAs) to

Long-pulse beam stability experiments on the DARHT-II linear induction accelerator

When completed, the DARHT-II linear induction accelerator (LIA) will produce a 2-kA, 17-MeV electron beam in a 1600-ns flat-top pulse. In initial tests, DARHT-II accelerated beams with current pulse

Increasing the intensity of an induction accelerator and reduction of the beam breakup instability

A 7 cm cathode has been deployed for use on a 3.8 MV, 80 ns (FWHM) Blumlein, to increase the extracted electron current from the nominal 1.7 to 2.9 kA. The intense relativistic electron bunch is

Direct measurement of the image displacement instability in a linear induction accelerator

The image displacement instability (IDI) has been measured on the 20 MeV Axis I of the dual axis radiographic hydrodynamic test facility and compared to theory. A 0.23 kA electron beam was

Beam injector and transport calculations for ITS

The Integrated Test Stand at Los Alamos National Laboratory (LANL) is addressing issues in high-brightness electron beam generation, acceleration, and transport. The machine consists of a 3 kA, 3.5

The Resistive-Wall Instability in Multipulse Linear Induction Accelerators

  • C. Ekdahl
  • Physics
    IEEE Transactions on Plasma Science
  • 2017
The resistive-wall instability results from the Lorentz force on the beam due to the beam image charge and current. If the beam pipe is perfectly conducting, the electric force due to the image

Reconstruction of FXR beam conditions

Beam-envelope radius, envelope angle, and beam emittance can be derived from measurements of beam radius for at least three different transport conditions. We have used this technique to reconstruct