A5044906287- Magnetic confinement fusion research
- Fusion materials and technologies
- Superconducting Materials and Applications
- Advanced Radiotherapy Techniques
- Laser-Plasma Interactions and Diagnostics
- Ionosphere and magnetosphere dynamics
- Radiation Therapy and Dosimetry
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Combustion and Detonation Processes
- Laser-Matter Interactions and Applications
- Radiation Dose and Imaging
- Nuclear Engineering Thermal-Hydraulics
- Radiation Effects and Dosimetry
- Nuclear Materials and Properties
- Privacy-Preserving Technologies in Data
- High-Velocity Impact and Material Behavior
- Human-Automation Interaction and Safety
- Lightning and Electromagnetic Phenomena
- Lung Cancer Diagnosis and Treatment
- Advanced X-ray and CT Imaging
- Kawasaki Disease and Coronary Complications
- Ophthalmology and Visual Health Research
- Internet Traffic Analysis and Secure E-voting
WellSpan Health
2025
Sirjan University of Technology
2018-2024
Alborz University of Medical Sciences
2024
Jahrom University of Medical Sciences
2024
University of Nebraska–Lincoln
2022
Isfahan University of Medical Sciences
2017
Ahvaz Jundishapur University of Medical Sciences
2016
MedStar Health
2012-2015
University of Wisconsin–Madison
2005-2014
Roswell Park Comprehensive Cancer Center
2008-2011
The object of this review is to summarize the achievements research on Alcator C-Mod tokamak [Hutchinson et al., Phys. Plasmas 1, 1511 (1994) and Marmar, Fusion Sci. Technol. 51, 261 (2007)] place that in context quest for practical fusion energy. a compact, high-field tokamak, whose unique design operating parameters have produced wealth new important results since it began operation 1993, contributing data extends tests critical physical models into parameter ranges regimes. Using only...
The requirements of the DIII-D physics program have led to development many operational control results with direct relevance ITER. These include new algorithms for robust and sustained stabilization neoclassical tearing modes electron cyclotron current drive, model-based controllers resistive wall mode in presence ELMs, coupled linear–nonlinear provide good dynamic axisymmetric while avoiding coil limits, adaptation plasma system (PCS) operate next-generation superconducting tokamaks....
A patient-specific quality assurance (QA) method was developed to verify gantry-specific individual multileaf collimator (MLC) apertures (control points) in volumetric modulated arc therapy (VMAT) plans using an electronic portal imaging device (EPID).VMAT treatment were generated Eclipse planning system (TPS). DICOM images from a Varian EPID (aS1000) acquired continuous acquisition mode used for pretreatment QA. Each cine image file contains the grayscale of MLC aperture related its...
High-pressure noble gas jet injection is a mitigation technique which potentially satisfies the requirements of fast response time and reliability, without degrading subsequent discharges. Previously reported experiments on DIII-D showed good success at reducing deleterious disruption effects. In this paper, results recent Alcator C-Mod are reported. Jointly, these have greatly improved understanding dynamics processes involved in mitigating both machines, sequence events following observed...
Bremsstrahlung radiation of runaway electrons is found to be an energy limit for in tokamaks. The minimum and maximum electron beams shown limited by collisions bremsstrahlung radiation, respectively. It also that a massive injection high-Z gas such as xenon can terminate disruption-generated current before the hit walls.
Damaging effects of disruptions are a major concern for Alcator C-Mod, ITER and future tokamak reactors. High-pressure noble gas jet injection is mitigation technique which potentially satisfies the operational requirements fast response time reliability, while still being benign to subsequent discharges. Disruption experiments using an optimized system carried out on C-Mod study physics penetration into high pressure plasmas, as well ability impurities convert plasma energy radiation...
Mixed gases are used for massive gas injection disruption mitigation on Alcator C-Mod in order to optimize radiation efficiency, halo current reduction and response time. Gas mixtures of helium argon (argon fraction 0–50%) investigated detail, as well deuterium, argon, krypton helium. Experiments show that injecting He/Ar leads faster thermal quenches than with pure or injection, thus improving the time system reducing current. Small fractions (∼5–10%) also lead optimized large electron...
Fast plasma shutdown without runaway electron generation by gas puffing is investigated in the JT-60U tokamak. Argon-only injection enables a fast shutdown; however, it induces generation. Hydrogen-only generates much less electrons; time considerably longer. Mixed of hydrogen and argon achieves Argon atoms contribute to radiate energy leading shutdown, whilst increase density for avoiding
Argon, krypton and xenon were puffed with without simultaneous hydrogen gas puffing into Ohmically heated plasmas of the JT-60U tokamak low plasma currents in order to study capability disruption mitigation. It was found that can provide a termination smaller amounts runaway electrons comparison argon puffing.
Compatibility between the plasma and low activation ferritic steel, which is a candidate material for fusion demonstration reactors, has been investigated step by in JFT-2M tokamak. We have entered third stage of Advanced Material Tokamak EXperiment (AMTEX), where inside vacuum vessel wall completely covered with steel plates (FIW). The effects FIW on production, impurity release, operation region, H-mode characteristics investigated. No negative effect observed up to now. A high normalized...
This paper summarizes highlights of research results from the Alcator C-Mod tokamak covering period 2006–2008. Active flow drive, using mode converted ion cyclotron waves, has been observed for first time in a plasma, mix D and 3 He species; toroidal poloidal flows are driven near location conversion layer. ICRF induced edge sheaths implicated both erosion thin boron coatings generation metallic impurities. Lower hybrid range frequencies (LHRF) microwaves have used efficient current profile...
Termination of the runaway electron current generated during plasma disruptions is found in JT-60U simulated vertical displacement events where safety factor at surface qs decreases. For all discharges with generation, disappears for qs⩾2 appearance spikes magnetic fluctuations. The growth rate fluctuations decreases by an order magnitude termination current. Corresponding to loss electrons fluctuations, heat flux pulses are measured inner divertor plates, which indicates interaction wall...
The dynamics of runaway electrons in tokamak plasmas is studied momentum space. In this analysis the are accelerated by an electric field while they decelerated collisional drag, synchrotron radiation, and bremsstrahlung radiation. It shown that inclusion losses into calculations important for interpretation disruption-mitigation experiments where large amounts high Z injected plasma. reduces maximum energy can gain from field.
Introduction: Myocardial bridge (MB) is a segment of major epicardial coronary artery that goes intramurally under overlying myocardium. Complications have been reported during or after stent implantation particularly perforation. The aim this study was to determine histological differences between proximal left anterior descending (LAD) and the tunneled may possible role in increased risk perforation percutaneous intervention. Methods: Twenty specimens MB were obtained from dissection 45...
A new operating regime, 'high recycling steady' (HRS) H-mode has been discovered in the JFT-2M tokamak. It is easily reproduced with neutral beam heating of any co-, balanced-, or counter-injection under wall fuelling from boronized first wall. The HRS characterized by good energy confinement (H89P ∼ 1.6) at a high density (ne/nGW 0.7; nGW Greenwald density), low radiation loss power fraction ( , typically), and complete disappearance large ELMs. Accompanying transition, coherent magnetic...
In JFT-2M, the applicability of reduced activation ferritic steel to a fusion demonstration reactor has been demonstrated mainly concerning ferromagnetic effect on plasma production, control, stability and confinement. The compatibility close wall with high-normalized beta plasmas investigated because will utilize stabilization effect. Due improvements in operation scenario modification guard limiter configuration, region showing good was extended closer position (the normalized minor...
Cystic lymphangiomas of abdomen has mostly involved mesentery and retro peritoneum that should be considered as a differential diagnosis abdominal masses. Pancreatic were extremely rare differentiated from neoplastic pancreatic cysts. Patients have commonly presented with epigastric pain relevant palpable mass.A 65-year-old lady who pain, then during investigations, cystic tumor which located in the tail pancreas, found. Whereas definite routine procedures was impossible, completely resected...
The most important feature of the “high recycling steady” (HRS) high-confinement mode (H-mode) regime in JFT-2M tokamak [H. Ninomiya et al., Fusion Science and Technology (2002), Vol. 42, p. 7] is stationary pedestal condition absence large edge localized modes (ELMs). Accompanying HRS H-mode transition, coherent magnetic fluctuations frequency range order 10–100kHz with significant variation are seen on probes at vessel wall. Above all, two types magnetohydrodynamics (MHD) activities, which...
A ferritic steel wall, which might be employed in fusion demonstration reactors, has been installed Japan Atomic Energy Research Institute Fusion Torus-2 Modified [Nucl. 41, 257 (2001)] to study the applicability of ferromagnetic walls plasmas. The tearing mode equation is solved presence a ferromagnetic/resistive wall effect ferromagnetism on stability tokamaks. It shown that weak surface modes depending current profile. destabilization due attraction perturbed magnetic field by...
Characteristics of post-disruption runaway electrons with impurity pellet injection were investigated for the first time using JT-60U tokamak device. A clear deposition neon ice pellets was observed in a plasma. The ablation attributed to energy relativistic pellet. high normalized electron density stably obtained nebar/nGW ˜ 2.2. Effects prompt exhaust and reduction plasma current without large amplitude MHD activities found. One possible explanation basic behavior is that it follows...
Compatibility between plasma and reduced activation ferritic steel, which is the leading candidate for structural material of a fusion demonstration reactor, has been investigated in Advanced Material Tokamak EXperiment (AMTEX). Ferritic plates (FPs) were installed progressively JFT-2M tokamak. The effect ferromagnetism on production, control, confinement, stability investigated. Impurity release behavior also Even when inside vacuum vessel wall was fully covered with FPs tokamak operated...
Alcator C-MOD has compared plasma performance with plasma-facing components (PFCs) coated boron to all-metal PFCs assess projections of energy confinement from current experiments next-generation burning tokamak plasmas. Low-Z coatings reduce metallic impurity influx and diminish radiative losses leading higher H-mode pedestal pressure that improves global through profile stiffness. RF sheath rectification along flux tubes intersect the antenna is found be a major cause localized erosion...
Machine Learning (ML) and Artificial Intelligence (AI) have shown promising results in many areas are driven by the increasing amount of available data. However, this data is often distributed across different institutions cannot be shared due to privacy concerns. Privacy-preserving methods, such as Federated (FL), allow for training ML models without sharing sensitive data, but their implementation time-consuming requires advanced programming skills. Here, we present FeatureCloud AI Store...