NDLI: Pbfa II applied b-field ion diode proton beam characteristics

Content Provider	IEEE Xplore Digital Library
Author	Johnson, D.J. Lockner, T.R. Leeper, R.J. Maenchen, J.E. Mendel, C.W. Rochau, C.E. Stygar, W.A. Coats, R.S. Desjarlais, M.P. Kensek, R.P. Mehlhorn, T.A. Nelson, W.E. Rosenthal, S.E. Quintenz, J.P. Stinnett, R.W.
Copyright Year	1989
Description	Author affiliation: Sandia National Laboratories (Johnson, D.J.)
Abstract	An applied B-field ion diode on PBFA II has produced a 17 TW proton beam for investigation of beam generation and transport physics pertinent to inertial confinement fusion experiments. Power was led to the diode via two conical self-magnetically-insulated transmission lines that incorporated plasma opening switches. The diode utilized a pair of B-field coils in disc shaped cathodes to produce a 3 T axial B-field that insulated the 16 mm anode-cathode gap from electron loss. The 15-cm-radius anode was configured with a 5.5-cm-tall curved ion emitting region. A 2.6 MA ion beam originated from this region, was accelerated to 6 MV in the anode-cathode gap, and then transported ballistically toward the axis in a current neutralizing gas cell. The best transport (75%) occurred with narrow 5.5-cm-tall anode sources in which a 180 kJ proton beam was observed within 1.2 cm of the diode centerline. The FWHM of the beam focused at the centerline of the diode was 5 to 7 mm. This beam gave a peak proton power density of approximately 5 TW/cm/sup 2/.
Starting Page	944
Ending Page	947
File Size	483815
Page Count	4
File Format	PDF
DOI	10.1109/PPC.1989.767646
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-06-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Diodes Particle beams Anodes Electrons Switches Coils Cathodes Insulation Acceleration Protons
Content Type	Text
Resource Type	Article

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