High-current x-pinch x-ray/EUV radiation sources.
Abstract
Ti, Fe, Mo, and W x-pinches at 0.9 MA yield bright, nanoseconds-duration x-ray bursts from a small spot at the intersection of the crossed thin wires. The goals of this program are: to develop a new (harder) x-ray backlighting source; to understand the final stage of the z-pinch MHD sausage instability; and to test x-ray spectropolarimetry (see Shlyaptseva et al). Time-resolved x-ray/EUV imaging, spectroscopy, and polarization spectroscopy are being employed to measure plasma parameters and electron distribution function. Devices include a capillary-based 2-D imaging spectrometer, a 6-channel Polychromator, a time-gated pinhole camera, polarimeter-spectrometers etc. An x-pinch backlighter and laser diagnostics are under development, and 2-D radiation-MHD modeling has been initiated. For Ti x-pinches, Te reaches 2 keV, the K-shell radiation is polarized, and 9 kJ of EUV/x-ray energy is emitted (50 J in K- and 4.5 kJ in L-shell, pulse duration of 1.5-5 ns). Beams of electrons travel to the anode, following the wires and the axial centerline. Plasma jets flow to electrodes, along the centerline. Smaller plasma jets, spaced at 2-mm intervals along the anode part of wires, flow perpendicularly from the wires toward the axial centerline. This work is supported by DOE, DOD, SNL, and UNR.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2000
- Bibcode:
- 2000APS..DPPMP1083K