scholarly journals Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source

Telecom ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 42-51
Author(s):  
Giorgio Sebastiano Mauro ◽  
Giuseppe Torrisi ◽  
Ornella Leonardi ◽  
Angelo Pidatella ◽  
Gino Sorbello ◽  
...  
Keyword(s):  
Power Distribution ◽  
Electron Cyclotron Resonance ◽  
Energy Content ◽  
Numerical Study ◽  
Critical Role ◽  
High Energy ◽  
Ion Source ◽  
Injection System ◽  
Microwave Antenna ◽  
Ecr Plasma

The design of a microwave antenna sustaining a high-energy-content plasma in Electron Cyclotron Resonance Ion Sources (ECRISs) is, under many aspects, similar to the design of a conventional antenna but presenting also peculiarities because of the antenna lying in a cavity filled by an anisotropic plasma. The plasma chamber and microwave injection system design plays a critical role in the development of future ECRISs. In this paper, we present the numerical study of an unconventionally shaped plasma cavity, in which its geometry is inspired by the typical star-shaped ECR plasma, determined by the electrons trajectories as they move under the influence of the plasma-confining magnetic field. The cavity has been designed by using CST Studio Suite with the aim to maximize the on-axis electric field, thus increasing the wave-to-plasma absorption. As a second step, an innovative microwave injection system based on side-coupled slotted waveguides is presented. This new launching scheme allows an uniform power distribution inside the plasma cavity which could lead to an increase of ion source performances in terms of charge states and extracted currents when compared to the conventional axial microwave launch scheme. Finally, the use of both the “plasma-shaped” cavity and the microwave side coupled scheme could make the overall setup more compact.

Letter: New Fragment Ion Production Method Using Super Cold Electrons in Electron Cyclotron Resonance Plasma

2007 ◽  
Vol 13 (5) ◽  
pp. 355-358 ◽  
Author(s):  
Masanori Kidera ◽  
Kazuya Takahashi ◽  
Shuichi Enomoto ◽  
Akira Goto ◽  
Yasushige Yano
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Production Method ◽  
Input Power ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Ecr Plasma ◽  
High Frequency Plasma ◽  
Frequency Plasma ◽  
Ion Production

We examined the fragmentation and ionization of molecules by low-temperature electrons generated by electron cyclotron resonance (ECR) plasma. We examined several types of metallocene compounds comprising a metal and 1,3-cyclopentadienes as ligands. We performed analyses using an ECR ion source (ECRIS) mass spectrometer. Consequently, we succeeded in ionizing fragments of an organometallic compound by adjusting the input power of the microwave introducing a super high-frequency plasma. Moreover, we succeeded in dynamically generating a significant quantity of fragment ions by continuously varying the input power. Information on the structure of a molecule may be acquired from this operation. Moreover, a molecule that could not be easily ionized thus far may now be ionizable when soft ionization is performed with this technique.

Development of a compact electron-cyclotron-resonance ion source for high-energy carbon-ion therapy

2005 ◽  
Vol 76 (11) ◽  
pp. 113304 ◽  
Author(s):  
M. Muramatsu ◽  
A. Kitagawa ◽  
Y. Sakamoto ◽  
S. Sato ◽  
Y. Sato ◽  
...  
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
High Energy ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Carbon Ion Therapy ◽  
Carbon Ion ◽  
Ion Therapy

Measurement of the high energy component of the x-ray spectra in the VENUS electron cyclotron resonance ion source

2008 ◽  
Vol 79 (3) ◽  
pp. 033302 ◽  
Author(s):  
D. Leitner ◽  
J. Y. Benitez ◽  
C. M. Lyneis ◽  
D. S. Todd ◽  
T. Ropponen ◽  
...  
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
High Energy ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Energy Component ◽  
X Ray ◽  
High Energy Component

Radio frequency injection system for electron-cyclotron-resonance ion source in a hostile environment

2006 ◽  
Vol 77 (3) ◽  
pp. 03A343
Author(s):  
C. Huet-Equilbec ◽  
P. Jardin ◽  
M. G. Saint Laurent ◽  
C. Barué ◽  
C. Canet ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Injection System ◽  
Hostile Environment

scholarly journals Generation of H2 on Board Lng Vessels for Consumption in the Propulsion System

2020 ◽  
Vol 27 (1) ◽  
pp. 83-95
Author(s):  
Ignacio Arias Fernández ◽  
Manuel Romero Gómez ◽  
Javier Romero Gómez ◽  
Luis M. López-González
Keyword(s):  
Energy Density ◽  
Energy Efficient ◽  
Storage Systems ◽  
Energy Content ◽  
Storage System ◽  
High Energy ◽  
High Energy Density ◽  
Injection System ◽  
Gas Combustion ◽  
Safety Hazard

AbstractAt present, LNG vessels without reliquefaction plants consume the BOG (boil-off gas) in their engines and the excess is burned in the gas combustion unit without recovering any of its energy content. Excess BOG energy could be captured to produce H2, a fuel with high energy density and zero emissions, through the installation of a reforming plant. Such H2 production would, in turn, require on-board storage for its subsequent consumption in the propulsion plant when navigating in areas with stringent anti-pollution regulations, thus reducing CO2 and SOX emissions. This paper presents a review of the different H2 storage systems and the methods of burning it in propulsion engines, to demonstrate the energetic viability thereof on board LNG vessels. Following the analysis, it is identified that a pressurised and cooled H2 storage system is the best suited to an LNG vessel due to its simplicity and the fact that it does not pose a safety hazard. There are a number of methods for consuming the H2 generated in the DF engines that comprise the propulsion plant, but the use of a mixture of 70% CH4-30% H2 is the most suitable as it does not require any modifications to the injection system. Installation of an on-board reforming plant and H2 storage system generates sufficient H2 to allow for almost 3 days’ autonomy with a mixture of 70%CH4-30%H2. This reduces the engine consumption of CH4 by 11.38%, thus demonstrating that the system is not only energy-efficient, but lends greater versatility to the vessel.

Development of a Novel Mass Spectrometer Equipped with an Electron Cyclotron Resonance Ion Source

2007 ◽  
Vol 13 (4) ◽  
pp. 239-248 ◽  
Author(s):  
Masanori Kidera ◽  
Kazuya Takahashi ◽  
Shuichi Enomoto ◽  
Youhei Mitsubori ◽  
Akira Goto ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Elemental Analysis ◽  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Isotopic Analysis ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Temperature Plasma ◽  
Ecr Plasma ◽  
Isotopic Analyses

The ionization efficiency of an electron cyclotron resonance ion source (ECRIS) is generally high and all elements can be fundamentally ionized by the high-temperature plasma. We focused our attention on the high potentiality of ECRIS as an ion source for mass spectrometers and attempted to customize a mass spectrometer equipped with an ECRIS. Precise measurements were performed by using an ECRIS that was specialized and customized for elemental analysis. By using the charge-state distribution and the isotope ratio, the problem of overlap, such as that observed in the spectra of isobars, could be solved without any significant improvement in the mass resolution. When the isotope anomaly (or serious mass discrimination effect) was not observed in ECR plasma, the system was found to be very effective for isotope analysis. In this paper, based on the spectrum (ion current as a function of an analyzing magnet current) results of low charged state distributions (2+, 3+, 4+, …) of noble gases, we discuss the feasibility of an elemental analysis system employing an ECRIS, particularly for isotopic analysis. The high-performance isotopic analysis obtained from an ECRIS mass spectrometer in this study suggests that it can be widely applied to several fields of scientific study that require elemental or isotopic analyses with high sensitivity.

Sign in / Sign up

Export Citation Format

Share Document