scholarly journals Measurements of DT alpha particle loss near the outer midplane of TFTR

10.2172/91935 ◽  
1995 ◽  
Author(s):  
S.J. Zweben ◽  
D.S. Darrow ◽  
H.W. Herrmann ◽  
M.H. Redi ◽  
J. Schivell ◽  
...  
Keyword(s):  
Alpha Particle ◽  
Particle Loss

scholarly journals Accelerated methods for direct computation of fusion alpha particle losses within, stellarator optimization

2020 ◽  
Vol 86 (2) ◽  
Author(s):  
Christopher G. Albert ◽  
Sergei V. Kasilov ◽  
Winfried Kernbichler
Keyword(s):  
Alpha Particle ◽  
Symplectic Integrators ◽  
Particle Loss ◽  
Early Classification ◽  
Statistical Computation ◽  
Computational Speed ◽  
Order Of Magnitude ◽  
Speed Up ◽  
Orbit Types ◽  
Optimization Loop

Accelerated statistical computation of collisionless fusion alpha particle losses in stellarator configurations is presented based on direct guiding-centre orbit tracing. The approach relies on the combination of recently developed symplectic integrators in canonicalized magnetic flux coordinates and early classification into regular and chaotic orbit types. Only chaotic orbits have to be traced up to the end, as their behaviour is unpredictable. An implementation of this technique is provided in the code SIMPLE (symplectic integration methods for particle loss estimation, Albert et al., 2020b, doi:10.5281/zenodo.3666820). Reliable results were obtained for an ensemble of 1000 orbits in a quasi-isodynamic, a quasi-helical and a quasi-axisymmetric configuration. Overall, a computational speed up of approximately one order of magnitude is achieved compared to direct integration via adaptive Runge–Kutta methods. This reduces run times to the range of typical magnetic equilibrium computations and makes direct alpha particle loss computation adequate for use within a stellarator optimization loop.

scholarly journals Measurements of DT alpha particle loss near the outer midplane of TFTR

1995 ◽  
Vol 35 (12) ◽  
pp. 1445-1455 ◽  
Author(s):  
S.J Zweben ◽  
D.S Darrow ◽  
H.W Herrmann ◽  
M.H Redi ◽  
J.F Schivell ◽  
...  
Keyword(s):  
Alpha Particle ◽  
Particle Loss

The current generated by alpha-particle loss in tokamak reactors

1980 ◽  
Vol 20 (8) ◽  
pp. 1041-1046 ◽  
Author(s):  
Ya. I. Kolesnichenko ◽  
S.N. Reznik ◽  
V.A. Yavorskij
Keyword(s):  
Alpha Particle ◽  
Particle Loss ◽  
Tokamak Reactors

Characterization of alpha particle loss during disruptions in TFTR during deuterium-tritium operation

1996 ◽  
Vol 36 (4) ◽  
pp. 475-494 ◽  
Author(s):  
A.C Janos ◽  
E.D Fredrickson ◽  
R.V Budny ◽  
D.S Darrow ◽  
K.M McGuire ◽  
...  
Keyword(s):  
Alpha Particle ◽  
Particle Loss

scholarly journals Calculations of alpha particle loss for reversed magnetic shear in the Tokamak Fusion Test Reactor

1997 ◽  
Vol 4 (11) ◽  
pp. 4001-4008 ◽  
Author(s):  
M. H. Redi ◽  
R. B. White ◽  
S. H. Batha ◽  
F. M. Levinton ◽  
D. C. McCune
Keyword(s):  
Alpha Particle ◽  
Magnetic Shear ◽  
Particle Loss ◽  
Test Reactor

scholarly journals MHD-Induced Alpha Particle Loss in TFTR

10.2172/3588 ◽  
1999 ◽  
Author(s):  
D.S. Darrow ◽  
E.D. Fredrickson ◽  
G. Taylor ◽  
R.B. White ◽  
S.J. Zweben ◽  
...  
Keyword(s):  
Alpha Particle ◽  
Particle Loss
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