Energy and Current Density Measurements of RITS-6 Large-Area Diode Electron Beam

Author

Webb, Timothy J. ; Hahn, Kelly D. ; Johnston, Mark D. ; Oliver, Bryan V. ; Welch, Dale R.

Author_Institution

Adv. Radiographic Technol. Dept., Sandia Nat. Labs., Albuquerque, NM, USA

Volume

38

Issue

4

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

923

Lastpage

932

Abstract

The depth-dose measurements of Radiographic Integrated Test Stand-6 large-area diode electron beam operating at approximately 10-MV peak voltage suggest a 10 ?? 0.5-MeV equivalent monoenergetic electron beam. The unfolded electron spectrum reveals electrons > 1 MeV above the peak magnetically insulated transmission line voltage. The 1-D slices of the beam spatial profile obtained in the depth-dose measurements observe greater than 20% nonuniformity in the beam current density. The time-resolved measurements of the beam current density profile using images of beam-generated Cerenkov light show 2-D nonuniformities in the beam current density that change slowly during the 60-ns pulse, which do not depend strongly on the cathode surface condition.

Keywords

current density; electron spectra; plasma diagnostics; plasma diodes; plasma-beam interactions; relativistic electron beams; time resolved spectra; Cerenkov light images; beam current density profile; beam spatial profile; cathode surface condition; current density 2D nonuniformities; current density measurements; depth-dose measurements; electron spectrum; energy measurements; magnetically insulated transmission line voltage; monoenergetic electron beam; radiographic integrated test stand-6 large-area diode electron beam; time-resolved measurements; Beam diagnostics; depth-dose measurements; induction voltage adders; intense relativistic electron beams;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2010.2042306

Filename

5424023