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Title: High intensity positron program at LLNL

Abstract

Lawrence Livermore National Laboratory (LLNL) is the home of the world's highest current beam of keV positrons. The potential for establishing a national center for materials analysis using positron annihilation techniques around this capability is being actively pursued. The high LLNL beam current will enable investigations in several new areas. We are developing a positron microprobe that will produce a pulsed, focused positron beam for 3-dimensional scans of defect size and concentration with submicron resolution. Below we summarize the important design features of this microprobe. Several experimental end stations will be available that can utilize the high current beam with a time distribution determined by the electron linac pulse structure, quasi-continuous, or bunched at 20 MHz, and can operate in an electrostatic or (and) magnetostatic environment. Some of the planned early experiments are: two-dimensional angular correlation of annihilation radiation of thin films and buried interfaces, positron diffraction holography, positron induced desorption, and positron induced Auger spectra.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
2788
Report Number(s):
UCRL-JC-132024; DP0401281
DP0401281; TRN: US0101319
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Conference on Applications of Accelerators in Research and Industry, Denton, TX (US), 11/04/1998--11/07/1998; Other Information: PBD: 23 Sep 1998
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANGULAR CORRELATION; BEAM CURRENTS; LAWRENCE LIVERMORE NATIONAL LABORATORY; LINEAR ACCELERATORS; POSITRON BEAMS; MATERIALS TESTING; ACCELERATOR FACILITIES

Citation Formats

Asoka-Kumar, P, Howell, R H, and Stoeffl, W. High intensity positron program at LLNL. United States: N. p., 1998. Web. doi:10.1063/1.59156.
Asoka-Kumar, P, Howell, R H, & Stoeffl, W. High intensity positron program at LLNL. United States. doi:10.1063/1.59156.
Asoka-Kumar, P, Howell, R H, and Stoeffl, W. Wed . "High intensity positron program at LLNL". United States. doi:10.1063/1.59156. https://www.osti.gov/servlets/purl/2788.
@article{osti_2788,
title = {High intensity positron program at LLNL},
author = {Asoka-Kumar, P and Howell, R H and Stoeffl, W},
abstractNote = {Lawrence Livermore National Laboratory (LLNL) is the home of the world's highest current beam of keV positrons. The potential for establishing a national center for materials analysis using positron annihilation techniques around this capability is being actively pursued. The high LLNL beam current will enable investigations in several new areas. We are developing a positron microprobe that will produce a pulsed, focused positron beam for 3-dimensional scans of defect size and concentration with submicron resolution. Below we summarize the important design features of this microprobe. Several experimental end stations will be available that can utilize the high current beam with a time distribution determined by the electron linac pulse structure, quasi-continuous, or bunched at 20 MHz, and can operate in an electrostatic or (and) magnetostatic environment. Some of the planned early experiments are: two-dimensional angular correlation of annihilation radiation of thin films and buried interfaces, positron diffraction holography, positron induced desorption, and positron induced Auger spectra.},
doi = {10.1063/1.59156},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 23 00:00:00 EDT 1998},
month = {Wed Sep 23 00:00:00 EDT 1998}
}

Conference:
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