This title appears in the Scientific Report :
2000
Please use the identifier:
http://hdl.handle.net/2128/2323 in citations.
Scale size of magnetic turbulence in tokamaks probed with 30 MeV electrons
Scale size of magnetic turbulence in tokamaks probed with 30 MeV electrons
Measurements of synchrotron radiation emitted by 30-MeV runaway electrons in the TEXTOR-94 tokamak show that the runaway population decays after switching on neutral beam injection (NBI). The decay starts only with a significant delay, which decreases with increasing NBI heating power. This delay pr...
Saved in:
Personal Name(s): | Entrop, I. |
---|---|
Lopes Cardozo, N. J. / Jaspers, R. / Finken, K. H. | |
Contributing Institute: |
Institutsbereich I; IPP-1 Institutsbereich II; IPP-2 |
Published in: | Physical review letters, 84 (2000) S. 3606 |
Imprint: |
College Park, Md.
APS
2000
|
Physical Description: |
3606 |
Document Type: |
Journal Article |
Research Program: |
TEC-FOM Apparative Methoden zum Teilchenkreislauf und zur Leistungsauskopplung |
Series Title: |
Physical Review Letters
84 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Measurements of synchrotron radiation emitted by 30-MeV runaway electrons in the TEXTOR-94 tokamak show that the runaway population decays after switching on neutral beam injection (NBI). The decay starts only with a significant delay, which decreases with increasing NBI heating power. This delay provides direct evidence of the energy dependence of runaway confinement, which is expected if magnetic modes govern the loss of runaways. Application of the theory by Mynick and Strachan [Phys. Fluids 24, 695 (1981)] yields estimates for the "mode width" (delta) of magnetic perturbations: delta < 0.5 cm in Ohmic discharges, increasing to delta = 4.4 cm for 0.6 MW NBI. |