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Dr. K. Nassau (center) of AT&T Bell Laboratories lectures on the growth of crystals and gems at the October meeting of the Penn State Student Chapter. Also shown are Student Chapter members (left to right): Eric Plesko, Susan Hoyle, Mary Bliss, and Paul Sliva.

Mirage, Inc. Scheduled for February, Fisher's talk is titled "Technology as a Medium for Art: Research into Applications of Computer Graphics." The March meeting will feature Dr. Michael Quick and Dr. Kenneth Voss of Engelhard Corporation speaking on the state of the materials industry and working in the materials in-

dustry today. A tour of Hammermill Paper of Lock Haven, PA is planned for April. The Chapter will also be sponsoring a workshop on proposal writing this summer. Eric Plesko Student Chapter Program Committee

Advancing Materials Research From the National Research Council Published by National Academy Press Highlights ancient and recent advances in materials science and engineering, provides a look at the current status of materials research, and identifies major policy issues for corporate, academic and governmental services. MRS Members: $42.50

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Publications Department Materials Research Society 9800 McKnight Road, Suite 327 Pittsburgh, PA 15237 Telephone (412) 367-3012 PAGE 76, MRS BULLETIN, FEBRUARY 16/MARCH 16, 1987

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ION SOURCE for METALS X,Y RASTER SCANNER Physicon P/N RS1200—Precise, linear signal source for raster scanning ion and electron beams for a uniform finished dose on target, for imaging applications with electronic gate and search functions for surface analysis, and for voltage steering in automatic test equipment. Dual voltage ramps for two axes, X and Y, with controls from dc to milliseconds and, optionally, micro seconds.

X,Y VOLTAGE AMPLIFIER Physicon P/N RS1224—Four outputs to ± 300V, 600V differential. High slew rate, variable gain and dc offset features.

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10 to 100 pA range of analyzed positive ion currents from a broad range of metals, alloys, semiconductors and solid compounds. Samples are used in solid form, ionized by sputtering. Cold cathode operation for a long up-time, no filaments, air-cooled, compact size. Available complete with in-line mass filter, lenses, differential pumping, power supply, or as a component. Optional accessories: Extension to UHV for MBE applications, X,Y scanner for beam handling from dc to full rasters, microsecond pulsing.

PHYSICON Corporation 221 Mount Auburn Street, Boston MA 02138 USA Phone: 617/491-7997

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