Optimization of the extracted current density from the high energy diagnostic neutral beam injector of TdeV

1997 ◽  
Vol 68 (1) ◽  
pp. 289-291 ◽  
Author(s):  
A. H. Sarkissian ◽  
E. Charette ◽  
I. Condrea ◽  
B. C. Gregory
Keyword(s):  
Current Density ◽  
High Energy ◽  
Neutral Beam ◽  
Neutral Beam Injector

scholarly journals AN ADVANCED, HIGH ENERGY NEUTRAL BEAM INJECTOR

1981 ◽  
pp. 919-925
Author(s):  
J. Alessi ◽  
A. Maschke ◽  
K. Prelec ◽  
Th. Sluyters ◽  
J. Fink
Keyword(s):  
High Energy ◽  
Neutral Beam ◽  
Neutral Beam Injector

scholarly journals Vacuum System Optimization for EAST Neutral Beam Injector

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 264
Author(s):  
Guodong Wang ◽  
Si Zhang ◽  
Changqi Chen ◽  
Ning Tang ◽  
Jiaqi Lang ◽  
...  
Keyword(s):  
Vacuum Chamber ◽  
Ion Beam ◽  
Plasma Temperature ◽  
System Optimization ◽  
High Energy ◽  
Beam Line ◽  
Neutral Beam ◽  
Vacuum System ◽  
Fusion Plasma ◽  
Neutral Beam Injector

The neutral beam injector (NBI) generates a high-energy ion beam and neutralizes it, and then relies on drift transmission to inject the formed neutral beam into the fusion plasma to increase the plasma temperature and drive the plasma current. In order to better cooperate with the Experimental Advanced Superconductive Tokamak (EAST), part of the Chinese major national scientific and technological infrastructure, in carrying out long-pulse high-parameter physics experiments of 400 s and above, this paper considers the optimization of the current design and operation of the NBI beam line with a pulse width of 100 s. Based on an upgraded and optimized NBI vacuum chamber and the structure of the beam-line components, the gas-source characteristics under the layout design of the NBI system are analyzed and an NBI vacuum system that meets relevant needs is designed. Using Molflow software to simulate the transport process of gas molecules in the vacuum chamber, the pressure gradient in the vacuum chamber and the heat-load distribution of the low-temperature condensation surface are obtained. The results show that when the NBI system is dynamically balanced, the pressure of each vacuum chamber section is lower than the set value, thus meeting the performance requirements for the NBI vacuum system and providing a basis for subsequent implementation of the NBI vacuum system upgrade using engineering.

scholarly journals A Review of Radioactive Wastes Production and Potential Environmental Releases at Experimental Nuclear Fusion Facilities

Environments ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 6
Author(s):  
Sandro Sandri ◽  
Gian Marco Contessa ◽  
Marco D’Arienzo ◽  
Manuela Guardati ◽  
Maurizio Guarracino ◽  
...  
Keyword(s):  
Nuclear Fusion ◽  
High Energy ◽  
Point Of View ◽  
Neutral Beam ◽  
Fusion Reactions ◽  
Neutral Beam Injector ◽  
Main Components ◽  
Under Construction ◽  
Toroidal Geometry ◽  
High Neutron

The development of experimental nuclear fusion facilities and the systems connected to them currently involves the operation (or advanced design) of some large plants in the national territory. Devices such as neutron generators and plasma focus systems are also included. The machines developed to test the main components of these systems such as neutral beam generators (Neutral Beam Injector) and the experimental plants for thermonuclear fusion, mainly in the Tokamak configuration (toroidal geometry), are in the list. These applications are characterized by high neutron fluxes of high energy (typically 2.5 and 14 MeV from deuterium-deuterium and deuterium-tritium fusion reactions, respectively). They involve the production of radionuclides in the components of the machines and in the fluids used for targets’ cooling and in the primary containments. In many cases, the atmosphere of the rooms containing these structures is activated and may be affected by the dispersion of powders that are more or less radioactive. The present work addresses the issues mentioned so far, taking into consideration the real cases relating to the devices and the facilities in operation, under construction, and in the advanced design phase. The conclusions highlight the critical aspects related to the management of these types of waste, as well as the low or very low environmental impact, from a radiological point of view, of the examined facilities.

Enhanced Ion Transport in an Ether Aided Super Concentrated Ionic Liquid Electrolyte for Long-Life Practical Lithium Metal Battery Applications

2020 ◽  
Author(s):  
Urbi Pal ◽  
Fangfang Chen ◽  
Derick Gyabang ◽  
Thushan Pathirana ◽  
Binayak Roy ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Transport ◽  
Current Density ◽  
Coulombic Efficiency ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Mass ◽  
Lithium Metal ◽  
Ionic Liquid Electrolyte ◽  
Lithium Metal Battery

We explore a novel ether aided superconcentrated ionic liquid electrolyte; a combination of ionic liquid, <i>N</i>-propyl-<i>N</i>-methylpyrrolidinium bis(fluorosulfonyl)imide (C<sub>3</sub>mpyrFSI) and ether solvent, <i>1,2</i> dimethoxy ethane (DME) with 3.2 mol/kg LiFSI salt, which offers an alternative ion-transport mechanism and improves the overall fluidity of the electrolyte. The molecular dynamics (MD) study reveals that the coordination environment of lithium in the ether aided ionic liquid system offers a coexistence of both the ether DME and FSI anion simultaneously and the absence of ‘free’, uncoordinated DME solvent. These structures lead to very fast kinetics and improved current density for lithium deposition-dissolution processes. Hence the electrolyte is used in a lithium metal battery against a high mass loading (~12 mg/cm<sup>2</sup>) LFP cathode which was cycled at a relatively high current rate of 1mA/cm<sup>2</sup> for 350 cycles without capacity fading and offered an overall coulombic efficiency of >99.8 %. Additionally, the rate performance demonstrated that this electrolyte is capable of passing current density as high as 7mA/cm<sup>2</sup> without any electrolytic decomposition and offers a superior capacity retention. We have also demonstrated an ‘anode free’ LFP-Cu cell which was cycled over 50 cycles and achieved an average coulombic efficiency of 98.74%. The coordination chemistry and (electro)chemical understanding as well as the excellent cycling stability collectively leads toward a breakthrough in realizing the practical applicability of this ether aided ionic liquid electrolytes in lithium metal battery applications, while delivering high energy density in a prototype cell.

A Band Rejection Filter of High Current Radio Frequency Ion Source for Neutral Beam Injector

2021 ◽  
pp. 1-6
Author(s):  
Wei Liu ◽  
Qinglong Cui ◽  
Sheng Liu ◽  
Lizhen Liang ◽  
Yuanzhe Zhao ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Ion Source ◽  
Neutral Beam ◽  
High Current ◽  
Neutral Beam Injector ◽  
Rejection Filter

First plasma of megawatt high current ion source for neutral beam injector of the experimental advanced superconducting tokamak on the test bed

2011 ◽  
Vol 82 (2) ◽  
pp. 023303 ◽  
Author(s):  
Chundong Hu ◽  
Yahong Xie ◽  
Sheng Liu ◽  
Yuanlai Xie ◽  
Caichao Jiang ◽  
...  
Keyword(s):  
Ion Source ◽  
Neutral Beam ◽  
High Current ◽  
Test Bed ◽  
Neutral Beam Injector ◽  
Superconducting Tokamak
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