Progress in the Development of a High Power Helicon Plasma Source for the Materials Plasma Exposure Experiment

Goulding, Richard; Caughman, John; Rapp, Juergen; Biewer, Theodore; Bigelow, Tim; Campbell, Ian; Caneses Marin, Juan; Donovan, David; Kafle, Nischal; Martin, Elijah; Flynn, Holly; Shaw, Guinevere; Showers, Melissa A.

doi:10.1080/15361055.2017.1352429

Title: Progress in the Development of a High Power Helicon Plasma Source for the Materials Plasma Exposure Experiment

Conference · Fri Sep 01 00:00:00 EDT 2017

DOI:https://doi.org/10.1080/15361055.2017.1352429· OSTI ID:1424470

^[1];

^[1]; Campbell, Ian ^[1];

^[1]; Donovan, David ^[1];

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^[1]; Flynn, Holly ^[1]; Shaw, Guinevere ^[1];

^[1]

ORNL

Proto-MPEX is a linear plasma device being used to study a novel RF source concept for the planned Material Plasma Exposure eXperiment (MPEX), which will address plasma-materials interaction (PMI) for nuclear fusion reactors. Plasmas are produced using a large diameter helicon source operating at a frequency of 13.56 MHz at power levels up to 120 kW. In recent experiments the helicon source has produced deuterium plasmas with densities up to ~6 × 1019 m–3 measured at a location 2 m downstream from the antenna and 0.4 m from the target. Previous plasma production experiments on Proto-MPEX have generated lower density plasmas with hollow electron temperature profiles and target power deposition peaked far off axis. The latest experiments have produced flat Te profiles with a large portion of the power deposited on the target near the axis. This and other evidence points to the excitation of a helicon mode in this case.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1424470

Resource Relation:: Conference: 22nd Topical Meeting on the Technology of Fusion Energy (TOFE 2016) - Philadelphia, Pennsylvania, United States of America - 8/21/2016 4:00:00 AM-8/25/2016 4:00:00 AM

Country of Publication:: United States

Language:: English

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