Conceptual Design for a Fast Neutron Ionization Chamber for Fusion Reactor Plasma Diagnostics
Fusion Science and Technology / Volume 26 / Number 3P2 / November 1994 / Pages 945-948
Fusion Diagnostic and Neutronic Experiment and Analysis / Proceedings of the Eleventh Topical Meeting on the Technology of Fusion Energy New Orleans, Louisiana June 19-23, 1994 / dx.doi.org/10.13182/FST94-A40276
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A conceptual design for a radiation-hard “pointing” fast neutron ionization chamber that is capable of delivering a 1 MHz countrate of T(D,n) events at ITER is given. The detector will use a ∼1 cm3 volume of CO2 fill gas at 0.1 bar pressure in a ∼500 V/cm electric field. The pulse widths will be ∼10 ns, enabling it to operate in a flux of ∼6×1013 DT n/cm2/sec. A special collimator design is used, giving an estimated angular resolution of 4.5 degrees HWHM.
