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Kathryn Huff stepping down from DOE Nuclear Energy post
Huff
After serving two years as the Department of Energy’s assistant secretary for Nuclear Energy, Kathryn Huff will vacate that position on May 3 and return to teaching. Huff had started at the DOE in May 2021, serving for one year as the principal deputy assistant secretary for Nuclear Energy
“Serving in this capacity has been an unparalleled privilege, and I’m immensely grateful for the opportunity to have worked alongside you--the dedicated and talented public servants in Nuclear Energy, in DOE, and across the Biden-Harris Administration,” Huff wrote in an email announcement to colleagues last week. “I chose this timing to enable the smoothest transition back to my professorship at the University of Illinois at Urbana-Champaign where my beloved research, students, husband, and dog await.”
Thomas Hladschik, Klaus Schoepf
Fusion Science and Technology | Volume 26 | Number 3 | November 1994 | Pages 588-592
Plasma Heating and Current Drive, Plasma Engineering | Proceedings of the Eleventh Topical Meeting on the Technology of Fusion Energy New Orleans, Louisiana June 19-23, 1994 | doi.org/10.13182/FST94-A40221
Articles are hosted by Taylor and Francis Online.
In ITER the main loss mechanism of fast fusion alpha particles is expected to be due to toroidal field (TF) ripples caused by the finite number of TF coils. The associated radial diffusion of fast alphas is specified by an energy and space dependent diffusion coefficient which can be extended to account also for toroidal Alfven eigenmode (TAE) diffusion. Energy transfer from the fast alphas to the thermal background plasma is considered to occur due to Coulomb collisions and nuclear elastic scattering (NES). The α-transport is described here by a reduced slowing down kinetic equation of which the numerical solution provides for the energy-, space- and time-dependent alpha particle distribution in the tokamak plasma. This alpha distribution then constitutes the basis for a determinative calculation of the actual fusion power allocation to each distinct background species. Though TAE diffusion alone is not a significant fusion power loss mechanism, our recent calculations indicate that the coaction of TF-ripple (TFR) and TAE transport processes synergisticly results in a substantial reduction of fusion alpha power deposition.
