"On resonant ICRF absorption in plasmas with three ion species: a promising new tool for fast ion generation and bulk plasma heating," by Yevgen Kazakov (LPP, Royal Military Academy of Belgium)

Date: 
Thursday, April 30, 2015 - 1:00pm to 2:00pm
Series: 
Plasma Seminars

Plasma Seminar

Physics and Astronomy Building (PAB) Room 4-330
Thursday, April 30, 2015
1-2 PM
Refreshments at 12:30 PM

Guest Speaker: Yevgen Kazakov (LPP, Royal Military Academy of Belgium)

Talk Title: "On resonant ICRF absorption in plasmas with three ion species: a promising new tool for fast ion generation and bulk plasma heating"

Abstract:

Plasma heating with waves in the ion cyclotron range of frequencies (ICRF) is widely used for various applications. In this talk we report on a novel mechanism for enhancing ion absorption, which relies on the presence of three ion species in a plasma. An efficient absorption of RF power by a very small fraction of a third ion species (~ 1% or lower) is possible for a certain density ratio between the other two ion species. As a result, the absorbed power per resonant particle is much higher than for the traditional two-ion minority heating scenarios. An application of the proposed method for the generation of high-energy ions in fusion plasmas with ICRF is discussed, with the emphasis on the modular superconducting stellarator W7-X. The talk also includes a discussion of a new scenario for bulk ion heating of ITER D-T plasmas, which profits from the presence of intrinsic beryllium impurities.

Location: 
PAB 4-330