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Updated: Aug 8, 2025

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
Increased signal separation upgrade permits preliminary electron anisotropy measurements with Heliotron J multi-pass
Dechuan Qiu1, Takashi Minami2, Shinichiro Kado2
1Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto, Japan.
Abstract:
A signal separation system is constructed on the multi-pass Thomson scattering system of Heliotron J to solve the problem of overlapping scattered light signals for the electron temperature anisotropy measurement. The phenomenon of overlapping scattered light signals is relieved by operating the signal separation system. A Raman scattering experiment is undertaken to verify the separation effect of the signal separation system. Two scattered light signals corresponding to two adjacent incidences of one laser shot were extended to 104 ns. Moreover, we applied the multi-pass Thomson scattering system with signal separation system to the electron temperature anisotropy measurement. No anisotropy was observed within the error bars in the initial experiment.
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