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A polycapillary bending and focusing lens for neutrons

 

作者: H. H. Chen-Mayer,   D. F. R. Mildner,   V. A. Sharov,   Q. F. Xiao,   Y. T. Cheng,   R. M. Lindstrom,   R. L. Paul,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1997)
卷期: Volume 68, issue 10  

页码: 3744-3750

 

ISSN:0034-6748

 

年代: 1997

 

DOI:10.1063/1.1148020

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A glass polycapillary lens that both bends and focuses a cold neutron beam has been designed and constructed. The bender focuser guides part of the incident beam away from its line of sight and focuses it to a spot of width 0.65 mm at a distance 95 mm from the lens exit and 20 mm below the bottom edge of the beam path, with a gain of 20 in neutron current density. The neutron transmission characteristics of the lens have been determined with two types of position-sensitive detectors, a charge injection device, and an imaging plate. The lens has been tested with prompt gamma measurements on a gadolinium shard and titanium foil. ©1997 American Institute of Physics.

 

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