Fast-ion orbit sensitivity of neutron emission spectroscopy diagnostics

被引：20

作者：

Jarleblad, H. ^{[1
]}

Stagner, L. ^{[2
]}

Salewski, M. ^{[1
]}

Eriksson, J. ^{[3
]}

Benjamin, S. ^{[4
]}

Madsen, B. ^{[1
]}

Nocente, M. ^{[5
]}

Rasmussen, J. ^{[1
]}

Schmidt, B. S. ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

[2] Gen Atom, POB 85608, San Diego, CA 92186 USA

[3] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden

[4] Australian Natl Univ, Math Sci Inst, Canberra, ACT 2601, Australia

[5] Univ Milano Bicocca, Dept Phys, I-20126 Milan, Italy

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2021年 / 92卷 / 04期

关键词：

Neutron emission - Phase space methods - Emission spectroscopy;

D O I：

10.1063/5.0040696

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Fast ions in fusion plasmas often leave characteristic signatures in the plasma neutron emission. Measurements of this emission are subject to the phase-space sensitivity of the diagnostic, which can be mapped using weight functions. In this paper, we present orbit weight functions for the TOFOR and NE213 neutron diagnostics at the Joint European Torus, mapping their phase-space sensitivity in 3D orbit space. Both diagnostics are highly sensitive to fast ions that spend a relatively large fraction of their orbit transit times inside the viewing cone of the diagnostic. For most neutron energies, TOFOR is found to be relatively sensitive to potato orbits and heavily localized counter-passing orbits, as well as trapped orbits whose "banana tips" are inside the viewing cone of TOFOR. For the NE213-scintillator, the sensitivity is found to be relatively high for stagnation orbits.

引用

页数：5

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