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Measurements of DT and DD neutron yields by neutron activation on TFTR

Description: A variety of elemental foils have been activated by neutron fluence from TFTR under conditions with the DT neutron yield per shot ranging from 10{sup 12} to over 10{sup 18}, and with the DT/(DD+DT) neutron ratio varying from 0.5% (from triton burnup) to unity. Linear response over this large dynamic range is obtained by reducing the mass of the foils and increasing the cooling time, all while accepting greatly improved counting statistics. Effects on background gamma-ray lines from foil-capsule… more
Date: May 5, 1994
Creator: Barnes, C. W.; Larson, A. R.; LeMunyan, G. & Loughlin, M. J.
Partner: UNT Libraries Government Documents Department
open access

Measurements of DT and DD neutron yields by neutron activation on TFTR

Description: A variety of elemental foils have been activated by neutron fluence from TFTR under conditions with the DT neutron yield per shot ranging from 10{sup 12} to over 10{sup 18}, and with the DT/(DD+DT) neutron ratio varying from 0.5% (from triton burnup) to unity. Linear response over this large dynamic range is obtained by reducing the mass of the foils and increasing the cooling time, all while accepting greatly improved counting statistics. Effects on background gamma-ray lines from foil-capsule… more
Date: March 1, 1995
Creator: Barnes, C. W.; Larson, A. R.; LeMunyan, G. & Loughlin, M. J.
Partner: UNT Libraries Government Documents Department
open access

Design considerations for neutron activation and neutron source strength monitors for ITER

Description: The International Thermonuclear Experimental Reactor will require highly accurate measurements of fusion power production in time, space, and energy. Spectrometers in the neutron camera could do it all, but experience has taught us that multiple methods with redundancy and complementary uncertainties are needed. Previously, conceptual designs have been presented for time-integrated neutron activation and time-dependent neutron source strength monitors, both of which will be important parts of t… more
Date: December 31, 1997
Creator: Barnes, C. W.; Jassby, D. L.; LeMunyan, G.; Roquemore, A. L. & Walker, C.
Partner: UNT Libraries Government Documents Department
open access

Development of Lithium Deposition Techniques for TFTR

Description: The ability to increase the quantity of lithium deposition into TFTR beyond that of the Pellet Injector while minimizing perturbations to the plasma provides interesting experimental and operational options. Two additional lithium deposition tools were developed for possible application during the 1996 Experimental Schedule: a solid lithium target probe for real-time deposition, and a lithium effusion oven for deposition between discharges. The lithium effusion oven was operated in TFTR to depo… more
Date: October 1, 1997
Creator: Gorman, J.; Johnson, D.; Kugel, H.W.; Labik, G.; Lemunyan, G. & al, et
Partner: UNT Libraries Government Documents Department
open access

Development of lithium deposition techniques for TFTR

Description: The ability to increase the quantity of lithium deposition into TFTR beyond that of the Pellet Injector while minimizing perturbations to the plasma provides interesting experimental and operational options. Two additional lithium deposition tools were developed for possible application during the 1996 Experimental Schedule: a solid lithium target probe for real-time deposition, and a lithium effusion oven for deposition between discharges. The lithium effusion oven was operated in TFTR to depo… more
Date: October 1, 1997
Creator: Kugel, H.W.; Gorman, J.; Johnson, D.; Labik, G.; Lemunyan, G.; Mansfield, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Methods for the measuring surface tritium inside TFTR using beta decay

Description: Three potential methods for evaluating the surface tritium content of the TFTR vacuum vessel are described, each based on a different technique for measuring the in situ beta emission from tritium. These methods should be able to provide both a local and a global assessment of the tritium content within the top {approximately}1{mu}m of the inner wall surface.
Date: March 1, 1995
Creator: Zweben, S. J.; Johnson, D. W.; Hill, K. W.; Ku, L. P.; Lemunyan, G.; Loesser, D. et al.
Partner: UNT Libraries Government Documents Department
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