UKAEA Papers

"Neutral Beam Operations for JET TT and DT Campaigns"

• D B King
• R McAdams
• A Ash
• C Balshaw
• A Barth
• D Ciric
• K Deakin
• E Delabie
• H El-Haroun
• J Fan
• K Flinders
• T T C. Jones
• D Keeling
• R King
• S Marsden
• S Merriman
• M Nicassio
• T Robinson
• A Saigiridhari
• A Shepherd
• K Sabin
• R Sharma
• I Turner
• M Walsh
• T Wilson
• G Withenshaw
• B Woods
• JET Contributors
• JET Operations Team

Neutral Beam Injection (NBI) is a flexible auxiliary heating method for tokamak plasmas, capable of being efficiently coupled to the various plasma configurations required in the Tritium and mixed Deuterium-Tritium Experimental campaign (DTE2) on the JET device. High NBI power was required for high fusion yield and alpha particle studies and to …

"Approach to Spatial Integration on a Novel & Complex Major Project – STEP Concept Tokamak"

• Adam Woods
• Alex Hellend
• Jonathon Keep
• Emily Kimbrey
• James Hagues

The purpose of this work was to establish an approach to drive the development, at pace, of a commercially relevant Spherical Tokamak Concept. Building on the table of parameters and idealised geometry generated from the work of S. Muldrew et al [1], applying core principles, tools, and approaches. The generation and utilisation of a reflective …

"Density waves in low pressure plasma columns"

• LC Woods

"Finite amplitude effects on hydromagnetic waves"

• LC Woods

"On the boundary conditions at an insulating wall for hydromagnetic waves in a cylindrical plasma"

• LC Woods

"Two-stream instability, wave energy, and the energy principle"

• C. N. Lashmore-Davies

"Spectral transfers and zonal flow dynamics in the generalized Charney-Hasegawa-Mima model"

• C. N. Lashmore-Davies
• A. Thyagaraja
• D. R. Mccarthy

The mechanism of four nonlinearly interacting drift or Rossby waves is used as the basic process underlying the turbulent evolution of both the Charney-Hasegawa-Mima-equation CHME and its generalized modification GCHME. Hasegawa and Kodama’s concept of equivalent action or quanta is applied to the four-wave system and shown to control the distrib…

"Rapid Beat Generation of Large-Scale Zonal Flows by DriftWaves: A Nonlinear Generic Paradigm"

• D. R. Mccarthy
• C. N. Lashmore-Davies
• A. Thyagaraja

The generalized Charney-Hasegawa-Mima equation is unstable to a four wave modulational instability whereby a coherent, monochromatic drift wave can drive a band of modes and associated zonal flows unstable. Although initially the fastest growing modes dominate, a secondary nonlinear instability later drives the longest wavelength zonal flow and its…

"Relativistic Effects in Heating and Current Drive by Electron Bernstein Waves"

• A. K. Ram
• J. Decker
• A. Bers
• R. A. Cairns
• C. N. Lashmoredavies

The high-ß magnetically confined plasmas in spherical tori (ST), like NSTX and MAST, provide a unique opportunity for a wide variety of applications of electron Bernstein waves (EBW). These applications range from heating of the ST plasma to modifying and controlling its current profile. Using the fully relativistic dielectric tensor for a Maxwell…

"Emission of electron Bernstein waves in plasmas"

• A. K. Ram
• A. Bers
• C. N. Lashmore-Davies

In previous publications [A. K. Ram and S. D. Schultz, Phys. Plasmas 7 , 4084 (2000) ; A. Bers, A. K. Ram, and S. D. Schultz, in Proceedings of the Second Europhysics Topical Conference on RF Heating and Current Drive of Fusion Devices , edited by J. Jacquinot, G. Van Oost, and R. R. Weynants (European Physical Society, Petit-Lancy, 1998), Vol. 22A…