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Alchemy of Target Making; High Power ISOL Target Development – R&D Report

Alchemy of Target Making: High Power ISOL Target Development – R&D Report

By John P. Greene, Target Development Engineer Notre Dame

A U.S. Department of Energy

Office of Science Laboratory

Operated by The University of Chicago

Argonne National Laboratory

Office of Science

U.S. Department of Energy

The Alchemy of Target Making

John P. Greene, Target Development Engineer Notre Dame

Physics Seminar August 4, 2004

Physics Division

In the Beginning…

& 8226;Upon invention of the accelerator, the era of the “target maker”began; generally, the increase in sophistication of target making paralleled the increasingly complex developments in accelerator and nuclear physics.It is the target preparer who must provide the defined condition of the target sample –a complicated process involving the disciplines of chemistry, physics, metallurgy, ceramics, and material science.

& 8226;Targets prepared in the 1950’s were poorly defined and were frequently polynuclidic. With the advent of mass separators, in particular the calutrons, high purity mononuclidicmaterials became available for target preparations and precise nuclear reaction mechanisms could be studied. & 8226;It became clear to the nuclear physics community that the cost and complexity associated with isotope target preparation required some centralization of the function. Only the relatively straightforward preparations could be economically performed in the small laboratories associated with the various accelerator sites. Not only was the impetus for this centralization the result of economics, but also of the necessity to preserve the rare and costly isotopes available for this use.

John P. Greene, Target Development Engineer Notre Dame

35 page OCR-Quality pdf 7.5 MB

RAR File-Size: 6.79 MB

2004-08

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