Technology demonstration for the DARHT Linear Induction Accelerators
The Dual-Axis Radiographic Hydrodynamics Test (DARHT) facility will employ two 16-MeV, 3-kA Linear Induction Accelerators to produce intense, bremsstrahlung x-ray pulses for flash radiography. Technology demonstration of the key accelerator sub-systems is underway at the DARHT Integrated Test Stand (ITS), which will produce a 6-MeV, 3-kA, 60-ns flattop electron beam. We will summarize measurements of ITS injector, pulsed-power, and accelerator cell performance. Time-resolved measurements of the electron beam parameters will also be presented. These measurements indicate that the DARHT accelerator design is sufficiently advanced to provide the high quality electron beams required for radiography with sub-millimeter spatial resolution.
Pulsed Power Systems For The Darht Accelerators
The Dual-Axis Radiographic HydroTest (DARHT) Facility is being designed to produce high-resolution flash radiographs of hydrodynamics experiments. Two 16- to 20-MeV linear induction accelerators (LIA), with an included angle of 900, are used to produce intense bremsstrahlung x- ray pulses of short duration (60-ns flat-top). Each accelerator has a 4- MeV electron source that injects an electron beam into a series of 250- kV induction cells. The three major pulsed-power systems are the injectors, the induction-call pulsed-power (ICPP) units, and the ICPP trigger systems, and are discussed in this paper.
Magnet design for the DARHT linear induction accelerators
The linear induction accelerator focus magnet design for the Dual-Axis Radiographic Hydrotest (DARHT) facility is presented. Prototype solenoid magnets have demonstrated less than 1-mrad peak transverse error field while using large copper conductors. The design features multi-filar winding to reduce field errors due to winding geometry, iron rings within the solenoid to greatly reduce the effects of winding errors, and low-profile dipole trim magnets to correct installation errors. Numerical modeling of several designs is presented as well as data from magnetic field measurements of a series of prototype magnets.<<ETX>>