Portable neutron probe for soil humidity measurements

被引：0
|
作者：
Pouzo, J [1 ]
Milanese, M [1 ]
Moroso, R [1 ]
机构：
[1] UNCPBA, Fac Cs Ex, IFAS, Buenos Aires, DF, Argentina
来源：
PLASMA PHYSICS | 2003年 / 669卷
关键词：
D O I：
暂无
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A very small dense plasma focus (142 J) was designed and constructed with the aim to be used as portable pulsed fast neutron source (2.45 MeV in a pulse of 90 ns). The characteristics of this device make it suitable for underground use. The soil humidity can be determined through the detection of thermalized neutrons. In this work we show results of the several prototypes developed in laboratory research to find the best geometric and dynamic parameters for optimize the neutron yield. The diagnostic measurements performed in each discharge include bank current derivative and both time-integrated and time-resolved detection of neutrons emitted by the apparatus. The best neutron yield reached is of the order of 10(7) in 4 pi sr. flux per pulse. This result introduces a new point in an unexplored range of the neutron yield vs. focus current scaling taw.
引用
收藏
页码：277 / 280
页数：4
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