skip to main content

SciTech ConnectSciTech Connect

Title: Design of a diagnostic residual gas analyzer for the ITER divertor

One of the ITER diagnostics having reached an advanced design stage is a diagnostic RGA for the divertor, i.e. residual gas analysis system for the ITER divertor, which is intended to sample the divertor pumping duct region during the plasma pulse and to have a response time compatible with plasma particle and impurity lifetimes in the divertor region. Main emphasis is placed on helium (He) concentration in the ducts, as well as the relative concentration between the hydrogen isotopes (H2, D2, T2). Measurement of the concentration of radiative gases, such as neon (Ne) and nitrogen (N2), is also intended. Numerical modeling of the gas flow from the sampled region to the cluster of analysis sensors, through a long (~8m long, ~110mm diameter) sampling pipe terminating in a pressure reducing orifice, confirm that the desired response time (~1s for He or D2) is achieved with the present design.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [5] ;  [6] ;  [5] ;  [7] ;  [4] ;  [2] ;  [6] ;  [5] ;  [5]
  1. ORNL
  2. Oak Ridge National Laboratory (ORNL)
  3. EURATOM / UKAEA, UK
  4. United States ITER Project Office
  5. ITER Organization, Saint Paul Lez Durance, France
  6. ITER Organization, Cadarache, France
  7. Princeton Plasma Physics Laboratory (PPPL)
Publication Date:
OSTI Identifier:
1185698
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: SOFT 14, San Sebasti n, Spain, 20140929, 20141003
Research Org:
Oak Ridge National Laboratory (ORNL)
Sponsoring Org:
SC USDOE - Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY