Issue 10 Volume 41 May 16, 2003

This report results from a contract tasking University of Erlangen-Nuremberg as follows: contractor will investigate novel
designs of triangular Josephson Junction arrays attempting to improve the high-frequency performance of the arrays in two
ways; first, increase the operation frequencies and second, increase the output power of the millimeter-band radiation to level
enabling practical application of the arrays. Three approaches will be investigated. First, trimming of currents at the array
edges is expected to stabilize coherent oscillations and increase the operation margins (output power). Second, it appears
promising to set up a traveling wave in a transmission line that contains an array comparable with the wavelength. Third,
testing dipole-like active antennas to couple radiation out from arrays is a high priority task for emission in free space at high
frequencies. The contractor will experimentally verify the above concepts by designing new circuits and performing
experiments with Nb/AOx/Nb Josephson Junction arrays. For these experiments, the contractor will use a millimeter-wave
band receiver as well an on-chip detection circuits up to 300 GHz. Spatially-resolved measurements using low temperature
scanning laser microscopy will be performed in order to monitor array dynamics at the junction level. Furthermore, the
contractor intends to design a dipole antenna and test it with an integrated receiver in 400-500 GHz frequency range. For this
purpose, improvements for a flux-flow oscillator as a local oscillator may be needed. Finally, the contractor will perform
experiments with shunted junction arrays in order to simulate intrinsically overdamped high-Tc junctions and explore a
possibility of using high Tc layered junctions for oscillator application
DTIC
Josephson Junctions; High Frequencies
20030033120 Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
Laboratory Astrophysics and Microanalysis with NTD-Germanium-Based X-Ray Microcalorimeter
Silver, E.; Schnopper, H.; Bandler, S.; Murray, S.; Madden, N.; Landis, D.; Beeman, J.; Haller, E.; Barbera, M.; Tucker, G.;
Nuclear Instruments and Methods in Physics Research A; 2000; Volume 444, pp. 156-160; In English
Contract(s)/Grant(s): NAG5-5269; Copyright; Avail: CASI; A01, Hardcopy
With the ability to create cosmic plasma conditions in the laboratory it is possible to investigate the dependencies of key
diagnostic X-ray lines on density, temperature, and excitation conditions that exist in astrophysical sources with X-ray optics
and a high resolution x-ray microcalorimeter. The same instrumentation can be coupled to scanning electron microscopes or
x-ray fluorescence probes to analyze the elemental and chemical composition of electronic, biological, geological and
particulate materials. We describe how our microcalorimeter and x-ray optics provide significantly improved capabilities for
laboratory astrophysics and microanalysis.
Author
Astrophysics; Calorimeters; Germanium; Microanalysis; X Ray Fluorescence
20030033845 State Research Center of Russia, Moscow, Russian Federation
Electromagnetic Fields and Human Health: Fundamental and Applied Research.
October 28, 2002; 187 pp.; In English
Contract(s)/Grant(s): F61775-02-WF056
Report No.(s): AD-A410642; No Copyright; Avail: CASI; A09, Hardcopy
The proceedings of the 3rd International Conference on Electromagnetic Fields and Human Health held in Moscow and
St. Petersburg, 17-25 September 2002, have among the paper topics: interaction mechanisms of EMF; EMF effects in humans
from acute and chronic exposure; experimental studies in vivo and in vitro; mobile communication - prospects of development
and health of population; and EMF therapeutics. See the Conference Announcement & Program http:/www.who.
int/peh-emf/meetings/russia sept02/en/
DTIC
Electromagnetic Fields; Conferences; Health Physics; Research And Development
20030033910 Helsinki Univ. of Technology, Espoo (Finland)
Fabrication and Modelling of SOI and GaAs MSM Photodetectors and a GaAs-Based Integrated Photoreceiver
Honkanen, K.; 2001; In English
Report No.(s): PB2003-102633; Copyright; Avail: National Technical Information Service (NTIS)
In this work metal semiconductor metal photodetectors (MSM PDs), pseudomorphic high electron mobility transistors
(pHEMTs), and a monolithically integrated photorecevier are studied. The motivation for this work is to develop a solution
for high-speed data transfer in telecommunication systems. The goals are to develop the fabrication technology using electron
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