PBFA II applied B-field ion diode proton beam characteristics

Conference · Sun Jan 01 00:00:00 EST 1989

DOI:https://doi.org/10.1109/PPC.1989.767646· OSTI ID:6058273

Johnson, D. J.; Locknew, T. R.; Leeper, R. J.; Maenchen, J. E.; Mendel, C. W.; Rochau, G. E.; Stygar, W. A.; Coats, R. S.; Desjarlais, M. P.; Kensek, R. P.

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 fed 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/. 12 refs., 8 figs.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6058273
• Report Number(s): SAND-89-1458C; CONF-890665-17; ON: DE89014782
• Resource Relation: Conference: 7. Institute of Electrical and Electronics Engineers pulsed power conference, Monterey, CA, USA, 12 Jun 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
43 PARTICLE ACCELERATORS
PROTON BEAMS
BEAM TRANSPORT
FOCUSING
INERTIAL CONFINEMENT
ION BEAMS
MAGNETIC FIELDS
MAGNETIC SPECTROMETERS
PARTICLE BEAM FUSION ACCELERATOR
PLASMA DIAGNOSTICS
PLASMA SWITCHES
ACCELERATORS
BEAMS
CONFINEMENT
ELECTRICAL EQUIPMENT
EQUIPMENT
MEASURING INSTRUMENTS
NUCLEON BEAMS
PARTICLE BEAMS
PLASMA CONFINEMENT
SPECTROMETERS
SWITCHES
700208* - Fusion Power Plant Technology- Inertial Confinement Technology
430303 - Particle Accelerators- Experimental Facilities & Equipment