Neutron diagnostic systems for nuclear fusion based on diamond detectors.
AUG Seminar
- Date: Jan 19, 2026
- Time: 12:30 PM - 01:15 PM (Local Time Germany)
- Speaker: Julian Melbinger
- Associated with 1) TU Wien, Vienna, Austria 2) CIVIDEC Instrumentation, Vienna, Austria
- Location: L6 II
- Room: Seminarraum L6, 2.Stock Süd
Neutron diagnostics are essential for the safe and stable operation of nuclear fusion devices. Single-crystal chemical vapor deposition (sCVD) diamond is one of the most promising candidates for neutron diagnostics due to its radiation hardness, fast charge collection, and excellent energy resolution. Diamond detects DD neutrons via elastic scattering on ¹²C and DT neutrons through the ¹²C(n,α)⁹Be reaction, which allows measurements of neutron flux and neutron energy distribution. Diamond detectors are currently planned for ITER, SPARC from CFS, and several other future fusion experiments.
This presentation discusses the response of sCVD diamond detectors to DD and DT neutrons and examines their relevance for present and upcoming fusion experiments. A novel four stage proton recoil diamond spectrometer is introduced. It is the first instrument of this type and provides direct measurement of the neutron energy distribution for both DD and DT neutrons. ASDEX Upgrade has not previously used diamond based neutron diagnostics, which makes it an ideal device for a first measurement with this new detector system during plasma operation. First calibration results of the detector system are shown and the planned test of this detector at ASDEX Upgrade is outlined.
This presentation discusses the response of sCVD diamond detectors to DD and DT neutrons and examines their relevance for present and upcoming fusion experiments. A novel four stage proton recoil diamond spectrometer is introduced. It is the first instrument of this type and provides direct measurement of the neutron energy distribution for both DD and DT neutrons. ASDEX Upgrade has not previously used diamond based neutron diagnostics, which makes it an ideal device for a first measurement with this new detector system during plasma operation. First calibration results of the detector system are shown and the planned test of this detector at ASDEX Upgrade is outlined.