Pisces-RF: A helicon-plasma based linear-device for the study of fusion relevant plasma-materials-interactions

M.J. Baldwin; D. Nishijima; M.I. Patino; G. Gunner; T. Lynch; F. Chang; M.J. Simmonds; A. Založnik; S. Moore; B. Schwendeman; R. Ciamacco; R.P. Doerner; G.R. Tynan

Nuclear Materials and Energy (Sep 2023)

Pisces-RF: A helicon-plasma based linear-device for the study of fusion relevant plasma-materials-interactions

M.J. Baldwin,
D. Nishijima,
M.I. Patino,
G. Gunner,
T. Lynch,
F. Chang,
M.J. Simmonds,
A. Založnik,
S. Moore,
B. Schwendeman,
R. Ciamacco,
R.P. Doerner,
G.R. Tynan

Affiliations

M.J. Baldwin: Corresponding author.; Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
D. Nishijima: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
M.I. Patino: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
G. Gunner: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
T. Lynch: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
F. Chang: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
M.J. Simmonds: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
A. Založnik: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
S. Moore: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
B. Schwendeman: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
R. Ciamacco: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
R.P. Doerner: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA
G.R. Tynan: Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA

Journal volume & issue: Vol. 36
p. 101477

Abstract

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The helicon-plasma based-linear plasma-materials-interaction device, Pisces-RF is introduced. Steady-state plasma parameters in the target region are electron density up to ∼1019 m−3, electron temperature up to ∼10 eV, and ion flux up to ∼1023 m−2s−1 in D2 and He, with an associated maximum peak target heat flux of ∼1 MWm−2 and a few MWm−2 when accelerating ions with an electrical bias. Attached and detached target plasma regimes with both gaseous species can be achieved, as characterized by high and low Te (<1eV) plasmas with high fractions of singly ionized atomic ions. The downstream target plasma is inferred to have a low concentration of condensing or sticking impurity ions (< 0.1 ppb), as confirmed by accumulation experiments on electrically-floating targets in deposition-dominated low Te plasma conditions. The validation of Pisces-RF target PMI on W is confirmed by the observation of D retention values and W fuzz-layer thicknesses, obtained in D2 and He plasmas, that are in good agreement with prior literature. Lastly, the integration of Pisces-RF with a tandem ion-accelerator, to study the synergistic effects of simultaneous displacement damage and plasma irradiation, which we refer to as burning-plasma-material-interaction (BPMI), is discussed.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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