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    • 2019-10-24 15:30:20
    • Article ID: 721395

    Janardhan Manickam, Former Head of Theory Division and International Collaborator, Passes Away

    • Credit: PPPL Archives

      Janardhan Manickam at work at PPPL.

    Janardhan (Manny) Manickam, a physicist at the U.S. Department of Energy’s Princeton Plasma Physics Laboratory for 36 years who was head of the Theory Division and collaborated on physics experiments around the world, died on Oct. 18. He was 73.

    Manickam joined the Laboratory in 1975. He was appointed a principal research physicist at PPPL in 1986 and headed the Theory Division from 2005 until his retirement at the end of 2011. He was a visiting research scientist at numerous institutions, including the Max Planck Institute for Plasma Physics in Garching, Germany; the Plasma Physics Research Center in Switzerland; the Institute of Plasma Research in India; and the Japan Atomic Energy Research Institute.

     Developed code

    Manickam was known for his role in the development of PEST, a computer code used to predict disruptions on devices called tokamaks that can interrupt fusion experiments. “When I came to Princeton in 1981 as a student Manny was already a key part of the PEST group,” recalled Steve Cowley, PPPL director. “His expertise with numerical methods and their implementation on computers was essential to that development. In a group of highly competitive theoreticians he was a gentle presence but not one to be ignored. His advice was always thoughtful and wise.  He will be missed and remembered fondly by us all.”

    The author or co-author of 256 articles, with 5,555 citations, according to ResearchGate, Manickam was a leader in the fusion theory committee. His research focused on magnetohydrodynamics (MHD), which treats plasma as an electrically charged fluid. He was the national coordinator for spherical torus theory.

    Jon Menard, deputy director for research, noted that Manickam oversaw the PEST codes during their use in the physics design and optimization of tokamak experiments and to interpret experimental results. “I worked closely with Manny during my Ph.D. thesis, and many of the most important stability projections for the original NSTX device were obtained using the PEST-2 code,” Menard said. “Manny was always very interested in applying his codes to experiments and he was very knowledgeable about broader MHD issues. He was also a great mentor who was always kind and patient and he will be missed.”  

    Pioneer in study of edge-localized modes

    “He was a giant in the field of magnetohydrodynamic stability,” said physicist Rob Goldston, who was director of the Laboratory when Manickam was head of Theory. Goldston said the PEST computer code “set the gold standard.” Manickam also was a pioneer in the study of edge-localized modes, a type of plasma instability that occur on the outer edge of high confinement or H-mode, that “continue to be a major topic of world-wide fusion research,” Goldston said.

    Manickam was a co-host of the Science on Saturday Lecture Series before heading the Theory Division. He was chair of the National MHD Working Group and a member of the ITER Experts Group in MHD. He was a fellow of the American Physical Society and a vocal advocate of increasing the number of women in science, technology, engineering, and mathematics fields.

    Manickam grew up in Secunderabad, India. He graduated from Osmania University in India with a bachelor’s degree in physics and received a master’s degree in nuclear physics from Adhra University in India and a Ph.D. in plasma physics from Stevens Institute of Technology in Hoboken, New Jersey.

    Lawrence Township School Board member

    In addition to his other activities, Manickam was a member of the Lawrence Township Board of Education from 1996 to 2006. He loved sailing, model boats and planes, jazz music, scotch, and games. His daughters said their father was a wonderful storyteller who could explain any complicated science concept in easy to understand terms.

    Manickam lived in Lawrenceville, New Jersey, with his wife, Ruth Schmid, until recently when they moved to Oakland, California. He is survived by his wife, along with two daughters, Mira Manickam-Shirley and  Kira Gagne, his grandchildren Connor Gagne, and Bhumi and Hanu Manickam-Shirley, and his sisters Saras Puranik and Meera Srivatsa.

    PPPL, on Princeton University's Forrestal Campus in Plainsboro, N.J., is devoted to creating new knowledge about the physics of plasmas — ultra-hot, charged gases — and to developing practical solutions for the creation of fusion energy. The Laboratory is managed by the University for the U.S. Department of Energy’s Office of Science, which  is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, visit energy.gov/science

     

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