5 research outputs found
Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser-matter interaction
With the advent of high repetition rate laser facilities, novel diagnostic
tools compatible with these advanced specifications are in demand. This paper
presents the design of an active gamma-ray spectrometer intended for these high
repetition rate experiments, with particular emphasis on functionality within a
PW level laser-plasma interaction chamber's extreme conditions. The
spectrometer uses stacked scintillators to accommodate a broad range of
gamma-ray energies, demonstrating its adaptability for various experimental
setups. Additionally, it has been engineered to maintain compactness,
electromagnetic pulse resistance, and ISO-5 cleanliness requirements while
ensuring high sensitivity. The paper also outlines the unfolding process, to
recover the gamma-ray spectrum from the spectrometer's captured image thanks to
a calibration using a Co source
A method of detecting level change of uranium fluorination mixture in the hopper by gamma-ray dose
State selective study of H 3
Rate coefficients for nuclear spin state-specific recombination of H3+ ions with thermal electrons were measured using FALP and SA techniques at temperatures 77–300 K. For this purpose H2 gas with both thermal and enriched population of the para nuclear spin configuration was used. Measurements have shown that at 77 K para-H3+ exhibits five times higher binary recombination rate coefficient than ortho-H3+: (1.5 ± 0.4) × 10−7 vs. (3 ± 2) × 10−8 cm3s−1