Title :
Electron-beam transport studies for radiographic applications
Author :
Hinshelwood, D.D. ; Ponce, D.M. ; Mosher, D. ; Murphy, D.P. ; Schumer, J.W. ; Strasburg, S.D. ; Weber, B.V.
Author_Institution :
Div. of Plasma Phys., Naval Res. Lab., Washington, DC, USA
Abstract :
We have measured electron-beam-produced gas ionization in a paraxial-diode gas cell, using three different interferometric arrangements. We have also measured the beam net current at the channel wall. In the range of tens of kA/cm/sup 2/ and 0.3-5 Torr, the electron density is in the 10/sup 17/ cm/sup -3/ range, scaling strongly with beam current density and sublinearly with pressure. The fractional net current ranges from 20-40%. We are developing a rate-equation ionization model whose results are consistent with these measurements.
Keywords :
electric current measurement; electron beams; electron transport theory; p-i-n diodes; radiography; beam net current measurement; current density; electron density; electron-beam transport; gas ionization; interferometric arrangement; paraxial-diode gas cell; radiographic applications; rate-equation ionization model; Anodes; Current density; Current measurement; Density measurement; Electron beams; Ionization; P-i-n diodes; Physics; Plasma measurements; 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.2003.1277758
