UKAEA Journals

Showing 1 - 10 of 409 Journals Results
2021
UKAEA-CCFE-PR(21)79

Reconstructions of plasma equilibria using magnetic sensors and a Dα constraint were routine during operation of the MAST spherical tokamak, but reconstructions using kinetic profiles was not. These are necessary for stability and disruption analysis of the MAST database, as well as going forward for operation in the upgrade to the device, MAST…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 13/04/2022
2021
UKAEA-CCFE-PR(21)72

During the design process of fusion reactors it is desirable to rapidly prototype different design concepts and assess their suitability against a range of high level requirements. This helps to narrow the design window and scope out potential designs which can undergo further more detailed analysis. The Paramak is an open-source tool that aims …

Preprint Published
2021
UKAEA-CCFE-PR(21)69

The ASCOT orbit-following code has been equipped with a model for simulating charge exchange (CX) of fast ions with background atoms in magnetically confined fusion plasmas. The model was successfully verified by comparing simulated reaction mean free paths to analytical values across a range of fusion-relevant parameters. ASCOT was used to simu…

Preprint
2021
UKAEA-CCFE-PR(21)66

A systematic numerical investigation of the n =1 ( n is the toroidal mode number) internal kink mode (IKM) stability is carried out, for a conventional aspect ratio tokamak plasma in the presence of parallel equilibrium flow or its poloidal/toroidal projections. The computational results, obtained utilizing the recently updated MARS-F code [Y. Q…

Preprint
2021
UKAEA-CCFE-PR(21)62

Drift-reduced MHD models are widely used to study magnetised plasma phenomena, in particular for magnetically con ned fusion applications, as well as in solar and astrophysical research. This letter discusses the choice of Ohm’s law in these models, the resulting dispersion relations for the dynamics parallel to the magnetic field, and the impli…

Preprint
2021
UKAEA-CCFE-PR(21)61

We use beam tracing — implemented with a newly-written code, Scotty — and the reciprocity theorem to derive a model for the linear backscattered power of the Doppler Backscattering (DBS) diagnostic. Our model works for both the O-mode and X-mode in tokamak geometry (and certain regimes of stellarators). We present the analytical derivation of o…

Preprint
2021
UKAEA-CCFE-PR(21)52

Fusion has entered the engineering era. Moving from plasma science to experiments demonstrating the benefits of modified torus shapes and advanced divertor geometries, the ‘field’ has become an ‘industry’. Investors focus now on whether superconducting magnet joints are feasible in large tokamak designs and how to deliver net energy to grid…

Preprint
2021
UKAEA-CCFE-PR(21)46

The fusion performance of ELMy H-mode DT plasmas with q95 = 3 and \\beta_N = 1.8 (also referred to as medium-\\beta_N baseline scenario in the rest of this paper) are predicted with the JINTRAC suite of codes and the QuaLiKiZ transport model. The predictions are based on the analysis of DT plasmas from the first DT campaign on JET in 1997 (DTE1…

Preprint
2021
UKAEA-CCFE-PR(21)39

A recently updated version of the MARS-F code [Y. Q. Liu et al. Phys. Plasmas 7, 3681 (2000); L. Li et al. Phys. Plasmas 25, 082512 (2018); G. L. Xia et al. Nucl. Fusion 59, 126035 (2019)] is utilized to numerically investigate the plasma screening effect on the applied resonant magnetic perturbation (RMP) field, assuming various equilibrium flo…

Preprint Published
2021
UKAEA-CCFE-PR(21)38

Ion cyclotron resonance heating (ICRH) is one of the three additional heating schemes to be deployed on ITER. Its two antenna arrays, installed on the outboard midplane, will deliver 20 MW of RF power in the 40-55 MHz frequency range. The plasma-facing component of …

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 18/05/2023