TFTR experiments with 2% tritium beam fuelling

D. L. Jassby; J. D. Strachan; M. G. Bell; R. V. Budny; L. R. Grisham; K. W. Hill; L. C. Johnson; S. J. Zweben; M. J. Loughlin

doi:10.1088/0029-5515/39/2/305

TFTR experiments with 2% tritium beam fuelling

D. L. Jassby, J. D. Strachan, M. G. Bell, R. V. Budny, L. R. Grisham, K. W. Hill, L. C. Johnson, S. J. Zweben, M. J. Loughlin

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Abstract

Tritium has been injected into TFTR supershots using a gas feed containing 2% tritium and 98% deuterium in one or more neutral beam sources. A total of 38 beam-injected tritium shots required about 400 Ci of tritium, of which less than 5% actually entered the plasma. The ratio of D-T to D-D neutron rates varied from about 0.5 to 4.5. A peak neutron rate of 7.7 × 10¹⁶ D-T n/s together with 1.7 × 10¹⁶ D-D n/s was attained with eight 2% tritium beams delivering 18.7 MW. The measured D-T neutron rates are extrapolated to fusion powers in 50:50 D-T operation with similar plasma parameters. The experiments have also provided data for the D-T calibration of neutron and lost alpha particle detectors and for optimizing tritium beam injection. With the aid of a multichannel neutron collimator, these experiments have enabled the comparison of radial profiles of D-T neutron production and global neutron output with the predictions of simulation codes.

Original language	English
Pages (from-to)	189-208
Number of pages	20
Journal	Nuclear Fusion
Volume	39
Issue number	2
DOIs	https://doi.org/10.1088/0029-5515/39/2/305
State	Published - Feb 1999
Externally published	Yes

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title = "TFTR experiments with 2% tritium beam fuelling",

abstract = "Tritium has been injected into TFTR supershots using a gas feed containing 2% tritium and 98% deuterium in one or more neutral beam sources. A total of 38 beam-injected tritium shots required about 400 Ci of tritium, of which less than 5% actually entered the plasma. The ratio of D-T to D-D neutron rates varied from about 0.5 to 4.5. A peak neutron rate of 7.7 × 1016 D-T n/s together with 1.7 × 1016 D-D n/s was attained with eight 2% tritium beams delivering 18.7 MW. The measured D-T neutron rates are extrapolated to fusion powers in 50:50 D-T operation with similar plasma parameters. The experiments have also provided data for the D-T calibration of neutron and lost alpha particle detectors and for optimizing tritium beam injection. With the aid of a multichannel neutron collimator, these experiments have enabled the comparison of radial profiles of D-T neutron production and global neutron output with the predictions of simulation codes.",

author = "Jassby, {D. L.} and Strachan, {J. D.} and Bell, {M. G.} and Budny, {R. V.} and Grisham, {L. R.} and Hill, {K. W.} and Johnson, {L. C.} and Zweben, {S. J.} and Loughlin, {M. J.}",

year = "1999",

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doi = "10.1088/0029-5515/39/2/305",

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AU - Jassby, D. L.

AU - Strachan, J. D.

AU - Bell, M. G.

AU - Budny, R. V.

AU - Grisham, L. R.

AU - Hill, K. W.

AU - Johnson, L. C.

AU - Zweben, S. J.

AU - Loughlin, M. J.

PY - 1999/2

Y1 - 1999/2

N2 - Tritium has been injected into TFTR supershots using a gas feed containing 2% tritium and 98% deuterium in one or more neutral beam sources. A total of 38 beam-injected tritium shots required about 400 Ci of tritium, of which less than 5% actually entered the plasma. The ratio of D-T to D-D neutron rates varied from about 0.5 to 4.5. A peak neutron rate of 7.7 × 1016 D-T n/s together with 1.7 × 1016 D-D n/s was attained with eight 2% tritium beams delivering 18.7 MW. The measured D-T neutron rates are extrapolated to fusion powers in 50:50 D-T operation with similar plasma parameters. The experiments have also provided data for the D-T calibration of neutron and lost alpha particle detectors and for optimizing tritium beam injection. With the aid of a multichannel neutron collimator, these experiments have enabled the comparison of radial profiles of D-T neutron production and global neutron output with the predictions of simulation codes.

AB - Tritium has been injected into TFTR supershots using a gas feed containing 2% tritium and 98% deuterium in one or more neutral beam sources. A total of 38 beam-injected tritium shots required about 400 Ci of tritium, of which less than 5% actually entered the plasma. The ratio of D-T to D-D neutron rates varied from about 0.5 to 4.5. A peak neutron rate of 7.7 × 1016 D-T n/s together with 1.7 × 1016 D-D n/s was attained with eight 2% tritium beams delivering 18.7 MW. The measured D-T neutron rates are extrapolated to fusion powers in 50:50 D-T operation with similar plasma parameters. The experiments have also provided data for the D-T calibration of neutron and lost alpha particle detectors and for optimizing tritium beam injection. With the aid of a multichannel neutron collimator, these experiments have enabled the comparison of radial profiles of D-T neutron production and global neutron output with the predictions of simulation codes.

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VL - 39

SP - 189

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JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 2

ER -

TFTR experiments with 2% tritium beam fuelling

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