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in subjects: "Image Processing"

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Low electron beam energy CIVA analysis of passivated ICs

Low Energy Charge-Induced Voltage Alteration (LECIVA) is a new scanning electron microscopy technique developed to localize open conductors in passivated ICs. LECIVA takes advantage of recent experimental work showing that the dielectric surface equilibrium voltage has an electron flux density dependence at low electron beam energies ({le}1.0 keV). The equilibrium voltage changes from positive to negative as the electron flux density is increased. Like Charge-Induced Voltage Alteration (CIVA), … more

Date: August 1, 1994

Creator: Cole, E. I., Jr.; Soden, J. M.; Dodd, B. A. & Henderson, C. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Magnetic force microscopy/current contrast imaging: A new technique for internal current probing of ICs

This invited paper describes recently reported work on the application of magnetic force microscopy (MFM) to image currents in IC conductors [1]. A computer model for MFM imaging of IC currents and experimental results demonstrating the ability to determine current direction and magnitude with a resolution of {approximately} 1 mA dc and {approximately} 1 {mu}A ac are presented. The physics of MFM signal generation and applications to current imaging and measurement are described.

Date: September 1, 1993

Creator: Campbell, A. N.; Cole, E. I., Jr.; Dodd, B. A. & Anderson, R. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Coded aperture imaging in many-pin fuel bundles. [LMFBR]

As part of the experimental fast reactor safety research program at Sandia Laboratories for the Nuclear Regulatory Commission, the problems of fuel motion imaging in safety tests on a variety of facilities (ACPR UPGRADE, TREAT, TREAT UPGRADE, STF, CABRI) are being studied. Coded aperture imaging of both neutrons and gamma rays from many-pin fuel bundles is being studied. Realistic, detailed calculations are reported on gamma ray coded aperture imaging in many-pin bundles, and preliminary experi… more

Date: June 1, 1978

Creator: McArthur, D. A.; Halbleib, J. A., Sr. & Morel, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Los Alamos Calibration Laboratory for multi-spectral and thermal imaging radiometer systems

Los Alamos National Laboratory is currently constructing a calibration laboratory to support the radiometric calibration of remote earth sensing instrumentation. This laboratory will consist of a calibration station contained within a vacuum chamber whose output interface plane will provide a radiometrically characterized collimated optical beam of 16in. diameter. This output beam is fed to a thermal vacuum chamber where sensors under test are to be housed. The station will contain reference so… more

Date: June 1, 1994

Creator: Bender, S.; Maier, W. B., II; Byrd, D.; Holland, R.; Michaud, F. D.; Moore, S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Space-variant filtering for correction of wavefront curvature effects in spotlight-mode SAR imagery formed via polar formatting

Wavefront curvature defocus effects can occur in spotlight-mode SAR imagery when reconstructed via the well-known polar formatting algorithm (PFA) under certain scenarios that include imaging at close range, use of very low center frequency, and/or imaging of very large scenes. The range migration algorithm (RMA), also known as seismic migration, was developed to accommodate these wavefront curvature effects. However, the along-track upsampling of the phase history data required of the original… more

Date: December 31, 1996

Creator: Jakowatz, C. V., Jr.; Wahl, D. E.; Thompson, P. A. & Doren, N. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Non-invasive current and voltage imaging techniques for integrated circuits using scanning probe microscopy. Final report, LDRD Project FY93 and FY94

This report describes the first practical, non-invasive technique for detecting and imaging currents internal to operating integrated circuits (ICs). This technique is based on magnetic force microscopy and was developed under Sandia National Laboratories` LDRD (Laboratory Directed Research and Development) program during FY 93 and FY 94. LDRD funds were also used to explore a related technique, charge force microscopy, for voltage probing of ICs. This report describes the technical work perfor… more

Date: June 1, 1995

Creator: Campbell, A. N.; Cole, E. I., Jr. & Tangyunyong, Paiboon

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advances in X-Ray Computed Microtomography at the NSLS

The X-Ray Computed Microtomography workstation at beamline X27A at the NSLS has been utilized by scientists from a broad range of disciplines from industrial materials processing to environmental science. The most recent applications are presented here as well as a description of the facility that has evolved to accommodate a wide variety of materials and sample sizes. One of the most exciting new developments reported here resulted from a pursuit of faster reconstruction techniques. A Fast Fil… more

Date: August 1, 1998

Creator: Dowd, B. A.; Andrews, A. B.; Marr, R. B.; Siddons, D. P.; Jones, K. W. & Peskin, A. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department