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Development of a filtered AXUV diode array for X-pinch soft x-ray spectra in the energy range of 1–10 keV.
- Source :
- Review of Scientific Instruments; May2021, Vol. 92 Issue 5, p1-11, 11p
- Publication Year :
- 2021
-
Abstract
- We develop a filtered absolute extreme ultraviolet (AXUV) diode array to measure the time evolution of the soft x-ray spectrum in the energy range of 1–10 keV. AXUV–HS5, the detector, has a fast rise time of 0.7 ns, a wide energy detection range, and high accessibility. We use Geant4 simulations to design an appropriate filter set for flat-and-sharp virtual channels (VCs), where a filter with no spectral edge removes large tails of the response curves. A Levenberg–Marquardt (LM) method, sensitive to the expected spectral function, is improved to reliably generate a continuous radiation spectrum, by utilizing spectral information from the least-squares (LS) method that reconstructs a discrete spectrum with low spectral resolution directly from the VCs. We test the filtered AXUV diode array on an X-pinch device with a peak current of 140 kA at Seoul National University; the array with ten channels is installed in a vacuum chamber. For a two-wire 40 μm stainless steel X-pinch, x-ray power, radiation temperature, and the reconstructed x-ray spectrum are obtained from the filtered AXUV diode array by the combined LS–LM method. [ABSTRACT FROM AUTHOR]
- Subjects :
- X-ray spectra
SOFT X rays
DIODES
ELECTROMAGNETIC spectrum
VACUUM chambers
Subjects
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 92
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 152039786
- Full Text :
- https://doi.org/10.1063/5.0034638