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Updated: May 24, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
Multicharged ion source based on Penning-type discharge with electron cyclotron resonance heating by millimeter waves
A V Vodopyanov1, I V Izotov, D A Mansfeld
1Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia. avod@appl.sci-nnov.ru
Abstract:
We suggest a Penning-type discharge as a trigger discharge for fast development of pulsed electron cyclotron resonance plasma. The Penning-type discharge glows at a low pressure as needed. Gyrotron radiation (75 GHz, 200 kW, 1 ms) was used for plasma heating. Fully striped helium ions were demonstrated, average charge of ions in the plasma was ≈ 2. Experiment and calculations show that high charge states of heavier gases require lower initial pressure and longer development time. Only moderate charge states are achievable in this pulsed scheme.
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