Development of a spectroscopic technique to measure electric fields in plasma radiation sources

Award Information
Agency: Department of Defense
Branch: Defense Threat Reduction Agency
Contract: DTRA01-03-P-0241
Agency Tracking Number: T041-010-0046
Amount: $99,990.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: DTRA04-010
Solicitation Number: 2004.1
Small Business Information
104 Centre Ct., Radford, VA, 24141
HUBZone Owned: Y
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Edward Yadlowsky
 (540) 639-4019
Business Contact
 Robert Hazelton
Title: Secretary/Treasurer
Phone: (540) 639-4019
Research Institution
The intensity ratio of forbidden-to-allowed transitions in Li and He have been used to determine both turbulent electric fields due to plasma instabilities and quasi-static applied electric fields in low density and temperature plasmas. HY-Tech proposes to extend this technique to the plasma temperatures and densities encountered in plasma radiation sources. In this case uv spectra of Li-like and He-like ions of low Z elements will be measured with a grazing incidence grating spectrometer during the implosion phase of the pinch. A crystal spectrometer would be used to measure Li-like Ar spectra in the assembled pinch. Quasi-static electric fields inferred from these measurements would provide information about current channels flowing in the load, and turbulent electric fields would indicate the role of plasma instabilities in coupling the generator energy to the pinched plasma. In particular, the line broadening of the Ar XVI spectra at 18.5 angstroms would provide information about the coronal plasma that surrounds the core. This diagnostic technique would provide insight into the generator-load coupling processes which could be used to benchmark predictions of model calculations not previously open to scrutiny.

* Information listed above is at the time of submission. *

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