A novel concept to provide position-sensitivity to a microchannel plate (MCP) is described. While several designs exist to make MCPs position sensitive, all these designs are based upon collection of the electrons. In contrast, this approach utilizes an induced signal as the electron cloud emanates from an MCP and passes a wire plane. We demonstrate the validity of the concept by constructing a device that provides single electron detection with 98 μm position resolution (FWHM) over an area of 50 mm × 50 mm. The characteristics of the detector are described through both bench-top tests and simulation. After characterization of the detector, the sense wire detector was utilized for slow-neutron radiography. Furthermore, we utilized our knowledge of position-sensitive techniques to realize a beam-imaging MCP detector useful for radioactive beam facilities.
|Advisor:||de Souza, Romualdo T.|
|Commitee:||Hieftje, Gary M., Jacobson, Stephen C., Reilly, James P.|
|School Location:||United States -- Indiana|
|Source:||DAI-B 79/04(E), Dissertation Abstracts International|
|Subjects:||Analytical chemistry, Physical chemistry|
|Keywords:||Digital signal processing, Imaging, Microchannel plate detector, Neutron radiography, Position-sensitive microchannel plate detector, Sensing induced signals|
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