Abstract
Absolutely calibrated measurements of the neutron yield are important for the evaluation of the plasma performance such as the fusion gain Q in DD operating tokamaks. Total neutron yield is measured with {sup 235}U and {sup 238}U fission chambers and {sup 3}He proportional counters in JT-60 Upgrade. The in situ calibration was performed by moving the {sup 252}Cf neutron source toroidally through the JT-60 vacuum vessel. Detection efficiencies of three {sup 235}U and two {sup 3}He detectors were measured for 92 locations of the neutron point source in toroidal scans at two different major radii. The total detection efficiency for the torus neutron source was obtained by averaging the point efficiencies over the whole toroidal angle. The uncertainty of the resulting absolute plasma neutron source calibration is estimated to be {+-} 10%. (author).
Nishitani, Takeo;
Takeuchi, Hiroshi;
[1]
Barnes, C W
[2]
- Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
- and others
Citation Formats
Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W.
Absolute calibration of the neutron yield measurement on JT-60 Upgrade.
Japan: N. p.,
1991.
Web.
Nishitani, Takeo, Takeuchi, Hiroshi, & Barnes, C W.
Absolute calibration of the neutron yield measurement on JT-60 Upgrade.
Japan.
Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W.
1991.
"Absolute calibration of the neutron yield measurement on JT-60 Upgrade."
Japan.
@misc{etde_10117068,
title = {Absolute calibration of the neutron yield measurement on JT-60 Upgrade}
author = {Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W}
abstractNote = {Absolutely calibrated measurements of the neutron yield are important for the evaluation of the plasma performance such as the fusion gain Q in DD operating tokamaks. Total neutron yield is measured with {sup 235}U and {sup 238}U fission chambers and {sup 3}He proportional counters in JT-60 Upgrade. The in situ calibration was performed by moving the {sup 252}Cf neutron source toroidally through the JT-60 vacuum vessel. Detection efficiencies of three {sup 235}U and two {sup 3}He detectors were measured for 92 locations of the neutron point source in toroidal scans at two different major radii. The total detection efficiency for the torus neutron source was obtained by averaging the point efficiencies over the whole toroidal angle. The uncertainty of the resulting absolute plasma neutron source calibration is estimated to be {+-} 10%. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}
title = {Absolute calibration of the neutron yield measurement on JT-60 Upgrade}
author = {Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W}
abstractNote = {Absolutely calibrated measurements of the neutron yield are important for the evaluation of the plasma performance such as the fusion gain Q in DD operating tokamaks. Total neutron yield is measured with {sup 235}U and {sup 238}U fission chambers and {sup 3}He proportional counters in JT-60 Upgrade. The in situ calibration was performed by moving the {sup 252}Cf neutron source toroidally through the JT-60 vacuum vessel. Detection efficiencies of three {sup 235}U and two {sup 3}He detectors were measured for 92 locations of the neutron point source in toroidal scans at two different major radii. The total detection efficiency for the torus neutron source was obtained by averaging the point efficiencies over the whole toroidal angle. The uncertainty of the resulting absolute plasma neutron source calibration is estimated to be {+-} 10%. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}