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This content will become publicly available on May 12, 2017

Title: Initial experimental test of a helicon plasma based mass filter

High throughput plasma mass separation requires rotation control in a high density multi-species plasmas. A preliminary mass separation device based on a helicon plasma operating in gas mixtures and featuring concentric biasable ring electrodes is introduced. Plasma profile shows strong response to electrode biasing. In light of floating potential measurements, the density response is interpreted as the consequence of a reshaping of the radial electric field in the plasma. This field can be made confining or de-confining depending on the imposed potential at the electrodes, in a way which is consistent with single particle orbit radial stability. In conclusion, concurrent spatially resolved spectroscopic measurements suggest ion separation, with heavy to light ion emission line ratio increasing with radius when a specific potential gradient is applied to the electrodes.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Nova Photonics, Inc., Princeton, NJ (United States)
Publication Date:
OSTI Identifier:
1257876
Report Number(s):
PPPL--5197
Journal ID: ISSN 0963-0252; TRN: US1601761
Grant/Contract Number:
AC02-09CH11466
Type:
Accepted Manuscript
Journal Name:
Plasma Sources Science and Technology
Additional Journal Information:
Journal Volume: 25; Journal Issue: 3; Journal ID: ISSN 0963-0252
Publisher:
IOP Publishing
Research Org:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING differential confinement; electrode biasing; helicon source; plasma mass; filtering; plasma rotation; radial potential profile; rf produced plasma; spiral antenna; separation; shear