PBFA-I Diode Voltage Measurements Using a Fast Proton Energy Analyzer
Abstract
Diode voltage on the PBFA-I accelerator has not been measured by conventional techniques. Instead, diode voltage is obtained by time-resolved energy analysis of protons accelerated from a 1 em flashover source in the feed a few em from the diode. The analyzer is a Thomson Parabola with a pulsed electric field. The magnetic and electric fields sweep a proton beamlet across a piece of CR-39 track recording plastic. Proton energy, and diode voltage, are obtained from the magnetic deflection. Absolute timing is obtained from a timing fiducial in the electric deflection voltage, which is seen in the CR-39 record. The magnetic deflection has been calibrated by two techniques and is believed to be accurate to better than 5%. The resolution of the instrument is nearly 100 keV at 2 MeV. Absolute timing and time resolution are both about 4 ns. We discuss design considerations and present sample measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1983
- Accession Number
- ADA638406
Entities
People
- L. P. Mix
- P. L. Dreike
Organizations
- Sandia National Laboratories