Title :
Transport of a relativistic electron beam in gas and plasma-filled focusing cells for X-ray radiography
Author :
Welch, D.R. ; Rose, D.V. ; Oliver, B.V. ; Schamiloglu, E. ; Hahn, K. ; Maechen, J.E.
Author_Institution :
Mission Res. Corp., Albuquerque, NM, USA
Abstract :
Gas cells have been used in radiographic sources to assist in the focusing of intense electron beams, produced using pulsed-power accelerators, onto a high atomic number target to generate bremsstrahlung radiation. The quality of the resulting source increases linearly with the dose and inversely with the square of the spot size. Higher plasma conductivity in the cell could lead to an improved radiation source. Given a stable diode voltage, hybrid particle-in-cell simulations show improvement of the beam spot via preionization of the gas cell prior to arrival of the electron beam pulse.
Keywords :
bremsstrahlung; electron beam focusing; plasma X-ray sources; plasma accelerators; plasma diodes; plasma production; pulsed power technology; relativistic electron beams; X-ray radiography; bremsstrahlung radiation; gas cells; hybrid particle-in-cell simulation; plasma conductivity; plasma-filled focusing cell; pulsed-power accelerator; radiographic source; relativistic electron beam; stable diode voltage; Atomic beams; Atomic measurements; Electron accelerators; Electron beams; Particle accelerators; Plasma accelerators; Plasma sources; Plasma transport processes; Plasma x-ray sources; Radiography;
Conference_Titel :
Pulsed Power Conference, 2003. Digest of Technical Papers. PPC-2003. 14th IEEE International
Conference_Location :
Dallas, TX, USA
Print_ISBN :
0-7803-7915-2
DOI :
10.1109/PPC.2003.1277759
