A5002058845- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Fusion materials and technologies
- Ionosphere and magnetosphere dynamics
- Plasma Diagnostics and Applications
- Advanced Radiotherapy Techniques
- Brain Metastases and Treatment
- Laser-Plasma Interactions and Diagnostics
- Lung Cancer Diagnosis and Treatment
- Lung Cancer Research Studies
- Glioma Diagnosis and Treatment
- Physics of Superconductivity and Magnetism
- Lung Cancer Treatments and Mutations
- Pulsed Power Technology Applications
- Nuclear reactor physics and engineering
- Meningioma and schwannoma management
- Electrostatic Discharge in Electronics
- Management of metastatic bone disease
- Particle Accelerators and Free-Electron Lasers
- Neuroendocrine Tumor Research Advances
- Microwave Engineering and Waveguides
- Electromagnetic Launch and Propulsion Technology
- Hepatocellular Carcinoma Treatment and Prognosis
Culham Science Centre
2023
Culham Centre for Fusion Energy
2023
United Kingdom Atomic Energy Authority
2023
ITER
2012-2021
Royal Military Academy
2020
Arizona State University
2019-2020
Regional Health
2020
Clemson University
2020
Rice University
2020
Colorado School of Mines
2020
Hepatocellular carcinoma (HCC) is increasing in incidence due to hepatitis C. Stereotactic body radiotherapy (SBRT) a noninvasive, effective therapy the management of liver malignancies. The authors evaluated radiological response 26 patients with HCC treated SBRT at Indiana University.Between March 2005 and June 2008, who were not surgical candidates enrolled phase 1 2 trial. Eligibility criteria included solitary tumors ≤ 6 cm or up 3 lesions sum diameters cm, well-compensated cirrhosis....
The ITER electron cyclotron (EC) upper port antenna (or launcher) is nearing completion of the detailed design stage and final build-to-print will soon start. main objective this launcher to drive current locally stabilize neoclassical tearing modes (NTMs) (depositing ECCD inside island that forms on either q = 3/2 or 2 rational magnetic flux surfaces) control sawtooth instability (deposit near 1 surface). should be capable steering focused beam deposition location resonant surface over...
Neoclassical tearing modes (NTMs) are magnetic islands which increase locally the radial transport and therefore degrade plasma performance. They self-sustained by bootstrap current perturbed enhanced transport. The confinement degradation is proportional to island width position of resonant surface. q = 2 NTMs much more detrimental than 3/2 due their larger radii. metastable in typical scenarios with βN ⩾ 1 region where safety factor increasing radius. This fact that local pressure gradient...
A 24 MW Electron Cyclotron (EC) system operating at 170 GHz and 3600 s pulse length is to be installed on ITER. The EC plant shall deliver 20 of this power the plasma for Heating Current Drive (H&CD) applications. designed initiation, central heating, current drive, profile tailoring, Magneto-hydrodynamic control (in particular, sawteeth Neo-classical Tearing Mode) in flat-top phase plasma. preliminary design review was performed 2012, which identified a need extended application...
Localized electron heating and current drive, like those produced by cyclotron (ECH) systems, are powerful tools for controlling the sawtooth period. They allow direct modification of plasma parameters which determine stability. In this paper we report a set new experimental results obtained in Tokamak à Configuration Variable (TCV) related simulations applying period model transport code. The TCV device, equipped with very flexible ECH system, is specifically suited kind study. previous...
A steady-state, fully noninductive plasma current has been sustained for the first time in a tokamak using electron cyclotron drive only. In this discharge, 123 kA of have entire gyrotron pulse duration 2 s. Careful distribution across minor radius power deposited from three 0. 5-MW gyrotrons was essential reaching steady-state conditions. With central drive, up to 153 replaced transiently 100 ms. The scenario is confirmed by ability recharge Ohmic transformer. dependence efficiency on also...
The UK’s Spherical Tokamak for Energy Production (STEP) reactor design program has recently taken the decision to use exclusively microwave-based heating and current drive (HCD) actuators its concepts. This is based on a detailed assessment considering all viable HCD concepts, covering grid plasma efficiency, physics applications, technology maturity, integration, maintenance, costs. Of two microwave techniques: Electron Cyclotron (EC) Bernstein Wave (EBW), EC was deemed lowest risk EBW...
Electron cyclotron wave beams injected from a launcher placed in the upper part of vessel will be used ITER to control MHD instabilities, particular neoclassical tearing modes (NTMs). Simplified NTM stabilization criteria have been past guide optimization launcher. Their derivation is reviewed this paper and their range applicability clarified. Moreover, possible effects leading deterioration predicted performance are discussed. Particularly critical context broadening electron-cyclotron...
We present state-of-the-art computations of propagation and absorption electron cyclotron waves, retaining the effects scattering due to density fluctuations. In ITER, injected microwaves are foreseen suppress neoclassical tearing modes (NTMs) by driving current at resonant surfaces. Scattering beam can spoil good localization thus impair NTM control capabilities. A novel tool, WKBeam code, has been employed here in order investigate this issue. The code is a Monte Carlo solver for wave...
Confinement in TCV electron cyclotron heated discharges was studied as a function of plasma shape, i.e. elongation, 1.1 < κ< 2.15, and triangularity, -0.65 ⩽ δ 0.55. The energy confinement time found to increase with owing part the current elongation. beneficial effect negative triangularities most effective at low power tended decrease higher powers used. large variety sawtooth types observed for different deposition locations, from on-axis q = 1 region, simulated model that included local...
Nineteen patients with uveal melanoma were treated Gamma-Knife-based stereotactic radiosurgery (SRS). The radiation dose was 40 Gy prescribed to the 50% isodose line for all patients. median follow-up months. 3- and 5-year overall survival rates 86 55%, respectively. tumor control both 94%. Six of 19 (32%) developed distant metastasis 31-75 months after SRS. Out SRS, 2 had improved, 4 stable 13 worse vision in eye. SRS appears provide excellent local melanoma. risk is significant. Effective...
The transmission line (TL) subsystem associated with the ITER electron cyclotron heating and current drive system has reached conceptual design maturity. At this stage responsibility of finalizing been transferred from Organization to U.S. Domestic Agency. purpose TL is transmit microwaves generated by 170-GHz gyrotrons installed in radio-frequency building launchers located one equatorial four upper tokamak ports. Each consists evacuated HE11 waveguides, direct-current breaks, power...