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Title: Positron lifetime spectrometer using a DC positron beam

Abstract

An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.

Inventors:
;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174542
Patent Number(s):
6,635,871
Application Number:
09/894,776
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Xu, Jun, and Moxom, Jeremy. Positron lifetime spectrometer using a DC positron beam. United States: N. p., 2003. Web.
Xu, Jun, & Moxom, Jeremy. Positron lifetime spectrometer using a DC positron beam. United States.
Xu, Jun, and Moxom, Jeremy. Tue . "Positron lifetime spectrometer using a DC positron beam". United States. https://www.osti.gov/servlets/purl/1174542.
@article{osti_1174542,
title = {Positron lifetime spectrometer using a DC positron beam},
author = {Xu, Jun and Moxom, Jeremy},
abstractNote = {An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {10}
}

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