William J. Nellis

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William Joel Nellis (* around 1943 in Chicago ) is an American physicist .

Nellis studied at Loyola University in Chicago with a bachelor's degree in 1963 and at Iowa State University with a master's degree in 1965 and a doctorate in 1968. As a post-doctoral student , he was at the Argonne National Laboratory (materials science department) until 1970 and from 1970 Assistant Professor at Monmouth College. From 1973 he was at the Lawrence Livermore National Laboratory (LLNL). From 1978 to 1981 he was group leader of the High Dynamic Pressure Experimental Group. From 1984 to 1994 he was head of the physics department and from 1984 to 1994 head of the Center for High Pressure Sciences at the University of California Institute of Geophysics and Planetary Physics in Livermore. In 2000 he was a Teller Fellow there and in 2004 he retired from the LLNL. From 2004 he was also associated with Harvard University .

In 1989 he was visiting professor at the University of California, San Diego , and 2000 visiting scholar at Trinity College, Oxford.

Nellis investigated physical properties (such as the equation of state, electrical conductivity, speed of sound, phase transitions) of materials under high pressure (0.1 to 3 Mbar) and high density, generated by shock waves after the impact of projectiles accelerated to 8 km per second with a gas cannon. With Mitchell he showed that hydrogen becomes metallic at 1.4 Mbar and compression to nine times the usual liquid density (and 3000 Kelvin). The results can be applied, for example, to the conditions inside the large gas planets (such as Jupiter, Saturn).

In 1997 he and Arthur C. Mitchell received the George Duvall Shock Compression Science Award for groundbreaking experimental investigations of molecular and planetary fluids with shock wave compression and in 2001 the Bridgman Award . From 1999 to 2003 he was Vice President and 2003 to 2007 President of the International Association for the Advancement of High Pressure Science and Technology (AIRAPT).

He is a Fellow of the American Physical Society , the American Geophysical Union, and the American Association for the Advancement of Science .

Web links

Individual evidence

  1. ↑ Career data based on American Men and Women of Science , Thomson Gale 2004 and the information on his homepage in Harvard, see web links.
  2. ^ Nellis Making metallic hydrogen , Scientific American, May 2000. ST Weir, AC Mitchell, WJ Nellis, Metallization of Fluid Molecular Hydrogen at 140 GPa (1.4 Mbar) , Phys. Rev. Lett., Vol. 76, 1996, p. 1860
  3. ^ WJ Nellis, ST Weir, AC Mitchell, Metallization and Electrical Conductivity of Hydrogen in Jupiter, Science, Volume 273, 1996, p. 936
  4. ↑ Appreciation of the APS on the occasion of the Duvall Award
personal data
SURNAME Nellis, William J.
ALTERNATIVE NAMES Nellis, William Joel
BRIEF DESCRIPTION American physicist
DATE OF BIRTH around 1943
PLACE OF BIRTH Chicago