scholarly journals GOC: General Orbit Code. [In FORTRAN for IBM 360]

1979 ◽  
Author(s):  
L.B. Maddox ◽  
G.S. McNeilly
Keyword(s):  
General Orbit ◽  
Orbit Code

scholarly journals ADJUNCTION FOR VARIETIES WITH A ℂ* ACTION

2020 ◽  
Author(s):  
ELEONORA A. ROMANO ◽  
JAROSŁAW A. WIŚNIEWSKI
Keyword(s):  
Fixed Point ◽  
Line Bundle ◽  
Normal Bundle ◽  
Ample Line Bundle ◽  
Projective Manifold ◽  
Fano Manifolds ◽  
Adjunction Theory ◽  
Rank 2 ◽  
General Orbit ◽  
Complex Projective

Abstract Let X be a complex projective manifold, L an ample line bundle on X, and assume that we have a ℂ* action on (X;L). We classify such triples (X; L;ℂ*) for which the closure of a general orbit of the ℂ* action is of degree ≤ 3 with respect to L and, in addition, the source and the sink of the action are isolated fixed points, and the ℂ* action on the normal bundle of every fixed point component has weights ±1. We treat this situation by relating it to the classical adjunction theory. As an application, we prove that contact Fano manifolds of dimension 11 and 13 are homogeneous if their group of automorphisms is reductive of rank ≥ 2.

scholarly journals From patterns to space groups and the eigensymmetry of crystallographic orbits: a reinterpretation of some symmetry diagrams in IUCr Teaching Pamphlet No. 14

2012 ◽  
Vol 45 (4) ◽  
pp. 834-837
Author(s):  
Leopoldo Suescun ◽  
Massimo Nespolo
Keyword(s):  
Alternative Interpretation ◽  
Polar Space ◽  
Space Group ◽  
Space Groups ◽  
General Orbit

The space group of a crystal pattern is the intersection group of the eigensymmetries of the crystallographic orbits corresponding to the occupied Wyckoff positions. Polar space groups without symmetry elements with glide or screw components smaller than 1/2 do not contain characteristic orbits and cannot be realized in patterns (structures) made by only one crystallographic type of object (atom). The space-group diagram of the general orbit for this type of group has an eigensymmetry that corresponds to a special orbit in a centrosymmetric supergroup of the generating group. This fact is often overlooked, as shown in the proposed solution for Plates (i)–(vi) of IUCr Teaching Pamphlet No. 14, and an alternative interpretation is given.

A New FFAG Orbit Code

1985 ◽  
Vol 32 (5) ◽  
pp. 2243-2245 ◽  
Author(s):  
Philip F. Meads
Keyword(s):  
Orbit Code

Simulating energetic particle losses in JET plasmas with a reverse integration biasing scheme

2021 ◽  
Author(s):  
Phillip Bonofiglo ◽  
Mario Podesta ◽  
Roscoe B White ◽  
Vasily Kiptily ◽  
Victor Goloborodko ◽  
...  
Keyword(s):  
Energetic Particle ◽  
Transport Model ◽  
Thin Foil ◽  
Loss Model ◽  
Fully Integrated ◽  
Detector Geometry ◽  
Transport Loss ◽  
Energetic Particle Transport ◽  
Fast Ion ◽  
Orbit Code

Abstract An integrated energetic particle transport model has been constructed in JET plasmas constrained by experimental fast ion loss measurements. The model incorporates a synthetic fast ion loss detector identical to JET's thin-foil Faraday cup fast ion loss detector array. The loss model combines analyses from the TRANSP and ORBIT-kick codes with enhanced features for producing the synthetic diagnostic. Extensions to the ORBIT code framework allow a full-orbit representation within the vacuum region that can map particles directly to an installed detector geometry. Since synthetic fast ion loss detectors are plagued by weak loss statistics, a novel reverse integration biasing scheme has been implemented to boost computational efficiency. The model is validated against experimental loss measurements induced by long-lived kink modes and is found to be in good agreement. This confirms the development of a fully integrated transport/loss model which can be quantitatively verified against experiment allowing for future validation and predictive studies. The model is particularly useful for more complicated plasma scenarios that involve multiple fast ion species such as JET's 2021 DT-campaign.

Special applications of a general orbit theory for accelerated particles in cyclotrons

1980 ◽  
Vol 171 (3) ◽  
pp. 439-443
Author(s):  
W.M. Schulte ◽  
H.L. Hagedoorn
Keyword(s):  
Orbit Theory ◽  
General Orbit ◽  
Accelerated Particles

PPPL Lorentz orbit code

1990 ◽  
Vol 61 (10) ◽  
pp. 3262-3264 ◽  
Author(s):  
J. Felt ◽  
Cris W. Barnes ◽  
R. E. Chrien ◽  
S. A. Cohen ◽  
W. W. Heidbrink ◽  
...  
Keyword(s):  
Orbit Code

Supergoblin the Accelerated Orbit Code in Use for the Chalk River Superconducting Cyclotron

1985 ◽  
Vol 32 (5) ◽  
pp. 2522-2524 ◽  
Author(s):  
E. A. Heighway ◽  
C. R. Hoffmann
Keyword(s):  
Superconducting Cyclotron ◽  
Orbit Code

scholarly journals ORBXYZ: a 3D single-particle orbit code for following charged-particle trajectories in equilibrium magnetic fields

1981 ◽  
Author(s):  
D.V. Anderson ◽  
R.H. Cohen ◽  
J.R. Ferguson ◽  
B.M. Johnston ◽  
C.B. Sharp ◽  
...  
Keyword(s):  
Charged Particle ◽  
Magnetic Fields ◽  
Single Particle ◽  
Particle Trajectories ◽  
Particle Orbit ◽  
Orbit Code
Sign in / Sign up

Export Citation Format

Share Document