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

Abstract

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:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1185698
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: SOFT 14, San Sebasti n, Spain, 20140929, 20141003
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Klepper, C Christopher, Biewer, T. M., Graves, Van B, Andrew, P., Lukens, P. C., Marcus, Chris, Shimada, M., Hughes, S., Boussier, B., Johnson, D. W., Gardner, W. L., Hillis, D. L., Vayakis, G., Vayakis, G., and Walsh, M. Design of a diagnostic residual gas analyzer for the ITER divertor. United States: N. p., 2015. Web.
Klepper, C Christopher, Biewer, T. M., Graves, Van B, Andrew, P., Lukens, P. C., Marcus, Chris, Shimada, M., Hughes, S., Boussier, B., Johnson, D. W., Gardner, W. L., Hillis, D. L., Vayakis, G., Vayakis, G., & Walsh, M. Design of a diagnostic residual gas analyzer for the ITER divertor. United States.
Klepper, C Christopher, Biewer, T. M., Graves, Van B, Andrew, P., Lukens, P. C., Marcus, Chris, Shimada, M., Hughes, S., Boussier, B., Johnson, D. W., Gardner, W. L., Hillis, D. L., Vayakis, G., Vayakis, G., and Walsh, M. Thu . "Design of a diagnostic residual gas analyzer for the ITER divertor". United States. doi:.
@article{osti_1185698,
title = {Design of a diagnostic residual gas analyzer for the ITER divertor},
author = {Klepper, C Christopher and Biewer, T. M. and Graves, Van B and Andrew, P. and Lukens, P. C. and Marcus, Chris and Shimada, M. and Hughes, S. and Boussier, B. and Johnson, D. W. and Gardner, W. L. and Hillis, D. L. and Vayakis, G. and Vayakis, G. and Walsh, M.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}

Conference:
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