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Title: Beyond Orbital-Motion-Limited theory effects for dust transport in tokamaks

Dust transport in tokamaks is very important for ITER. Can many kilograms of dust really accumulate in the device? Can the dust survive? The conventional dust transport model is based on Orbital-Motion-Limited theory (OML). But OML can break in the limit where the dust grain becomes positively charged due to electron emission processes because it overestimates the dust collected power. An OML+ approximation of the emitted electrons trapped/passing boundary is shown to be in good agreement with PIC simulations.
Authors:
 [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1183393
Report Number(s):
LA-UR--15-23996
TRN: US1600155
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: 14. Dusty Plasma Meeting, Auburn, AL (United States), 27 May 2015; Related Information: PowerPoint presentation
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
OFES
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ITER TOKAMAK; MOTION; ORBITS; COLLISIONLESS PLASMA; DUSTS; EROSION; POTENTIALS; ELECTRONS; APPROXIMATIONS; COMPUTERIZED SIMULATION; TRAPPING Magnetic Fusion Energy