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Fusion Science and Technology
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Darleane C. Hoffman, transuranium element pioneer, dies at age 98
Hoffman
Nuclear chemist Darleane D. Hoffman, who was renowned for her research on transuranium elements that advanced the understanding of nuclear fission, died on September 4 at her home in Menlo Park, Calif. She was 98.
Iowa origins: Hoffman was born on November 8, 1926, in Terril, Ia. She attended Iowa State University, where she earned a bachelor’s degree in chemistry in 1948 and a doctorate in physical (or nuclear) chemistry in 1951. She then began working as a chemist at Oak Ridge National Laboratory.
Los Alamos research: In 1953, Hoffman began a research position at Los Alamos National Laboratory, where she conducted pioneering work on spontaneous fission. She served as the lab’s first female division leader in charge of the Chemistry and Nuclear Chemistry Division.
Y. K. Oh, D. L. Kim, Y. S. Kim, H.-C. Ri, C. J. Do, K. W. Cho, J. G. Yang, S. J. Yoo, C. H. Choi, K.-I. You, C. S. Ryoo, K. H. Hong, K. H. Kim, G. S. Lee, S. M. Hwang, K. H. Chung
Fusion Science and Technology | Volume 35 | Number 1 | January 1999 | Pages 379-383
Poster Presentations | doi.org/10.13182/FST99-A11963889
Articles are hosted by Taylor and Francis Online.
To conduct plasma research with a steady-state high magnetic field, a magnetic mirror system with a pair of superconducting magnets (SCMs), named Superconducting Magnet Plasma Research Facility (SPRF), is under development. Major components of the system are a pair of NbTi solenoid SCMs, two cryostats, a plasma chamber, and a dc power supply. Each SCMs is separated by 1-m distance and operated at 800 A. The magnetic flux density on the axis of the SPRF is 0.23 T at the mid point and 3.1 T at the magnet center, which gives the mirror ratio of 13.4.
In this paper, we describe the design consideration of SPRF, including the development activities of the magnets and the cryostats. Also, the test results of the magnets and the cryostats are described.
