Visible spectroscopy measurements in the PBFA II ion diode (invited)

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141686· OSTI ID:6351109

Bailey, J; Carlson, A L; Morrison, R L ^[1]; Maron, Y ^[2]

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1. Sandia National Laboratories, Albuquerque, NM (USA)
2. Physics Department, Weizmann Institute of Science, Rehovot (Israel)

We describe a new visible spectroscopy diagnostic system for measuring plasma properties in the PBFA II applied-B ion diode. The system transports light from the ion diode to a remote screen room where it is recorded by a spectrograph coupled to a streak camera. We developed extensive calibration techniques for measuring the collection efficiency into the fiber link, the effects of the background bremsstrahlung radiation on the fibers, the fiber transmission as a function of wavelength, and the absolute streaked-spectrograph sensitivity as a function of wavelength. We have recorded time-dependent spectral line profiles and intensities from the PBFA II plasma opening switch, the beam-transport gas cell, and the anode plasma. The Stark shift of the LiI 2{ital s}-2{ital p} transition observed on LiF-anode shots shows that the time-resolved electric field peaks at 7--8 MV/cm, the highest field ever measured using the Stark effect. The potential of these measurements to expand our knowledge of ion-diode physics is being explored.

• OSTI ID: 6351109
• Journal Information: Review of Scientific Instruments; (USA), Vol. 61:10; ISSN 0034-6748
• Country of Publication: United States
• Language: English

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