PBFA II applied B-field ion diode proton beam characteristics
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 Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6058273
- Report Number(s):
- SAND-89-1458C; CONF-890665-17; ON: DE89014782
- Country of Publication:
- United States
- Language:
- English
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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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ACCELERATORS
BEAM TRANSPORT
BEAMS
CONFINEMENT
ELECTRICAL EQUIPMENT
EQUIPMENT
FOCUSING
INERTIAL CONFINEMENT
ION BEAMS
MAGNETIC FIELDS
MAGNETIC SPECTROMETERS
MEASURING INSTRUMENTS
NUCLEON BEAMS
PARTICLE BEAM FUSION ACCELERATOR
PARTICLE BEAMS
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA SWITCHES
PROTON BEAMS
SPECTROMETERS
SWITCHES