Electron and Ion Source ECR Plasma for Electric Propulsion Applications

2007 ◽  
Author(s):  
Brandon Weatherford ◽  
Brad Sommers ◽  
John Foster
Keyword(s):  
Electric Propulsion ◽  
Ion Source ◽  
Ecr Plasma

Investigation of the Capillaritron ion source for electric propulsion

1981 ◽  
Author(s):  
J. PEREL ◽  
J. MAHONEY ◽  
B. KALENSHER
Keyword(s):  
Electric Propulsion ◽  
Ion Source

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.

Fabrication of P-Type Cuinse2 Thin Film by MBD Using ECR Excited Nitrogen Ion Source

1992 ◽  
Vol 268 ◽  
Author(s):  
M. Nishitani ◽  
T. Negami ◽  
M. Terauchi ◽  
T. Wada ◽  
T. Hirao
Keyword(s):  
Thin Films ◽  
Ion Source ◽  
Rich Region ◽  
Ecr Plasma ◽  
Nitrogen Ions ◽  
Nitrogen Ion ◽  
Excited Nitrogen ◽  
P Type ◽  
Cuinse2 Thin Film ◽  
Type Conduction

ABSTRACTPolycrystalline CuInSe2 thin films were prepared by coevaporation of the elements under the irradiation of nitrogenions excited by ECR plasma. Nitrogen atoms were doped uniformly in the obtained CuInSe2 films according to the SIMS analysis. The films showed p-type conduction even in the slightly In-rich region where the coevaporation films without the irradiation of nitrogen ions showed n-type conduction. These results show that p-type CuInSe2 thin films even in the slightly In-rich region can be fabricated by the irradiation of ECR excited nitrogen ions during its ternary coevaporation process.

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.

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.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

Nucleation and Early Growth of Sputtered thin Films

1970 ◽  
Vol 28 ◽  
pp. 516-517
Author(s):  
Dudley M. Sherman ◽  
Thos. E. Hutchinson
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
Ion Beam ◽  
Ion Source ◽  
Water Cooling ◽  
Stages Of Growth ◽  
Lens Assembly ◽  
Microscope Technique ◽  
Ion Beam Sputter Deposition

The in situ electron microscope technique has been shown to be a powerful method for investigating the nucleation and growth of thin films formed by vacuum vapor deposition. The nucleation and early stages of growth of metal deposits formed by ion beam sputter-deposition are now being studied by the in situ technique.A duoplasmatron ion source and lens assembly has been attached to one side of the universal chamber of an RCA EMU-4 microscope and a sputtering target inserted into the chamber from the opposite side. The material to be deposited, in disc form, is bonded to the end of an electrically isolated copper rod that has provisions for target water cooling. The ion beam is normal to the microscope electron beam and the target is placed adjacent to the electron beam above the specimen hot stage, as shown in Figure 1.

Aspects of high-resolution imaging with a scanning ion microprobe

1986 ◽  
Vol 44 ◽  
pp. 750-751
Author(s):  
R. Levi-Setti ◽  
J. M. Chabala ◽  
Y. L. Wang
Keyword(s):  
Metal Ion ◽  
Secondary Ion Mass Spectrometry ◽  
Chromatic Aberration ◽  
Ion Source ◽  
Ion Microprobe ◽  
Emission Pattern ◽  
Intrinsic Resolution ◽  
Resolution Imaging ◽  
20 Nm ◽  
Secondary Ion

We have shown the feasibility of 20 nm lateral resolution in both topographic and elemental imaging using probes of this size from a liquid metal ion source (LMIS) scanning ion microprobe (SIM). This performance, which approaches the intrinsic resolution limits of secondary ion mass spectrometry (SIMS), was attained by limiting the size of the beam defining aperture (5μm) to subtend a semiangle at the source of 0.16 mr. The ensuing probe current, in our chromatic-aberration limited optical system, was 1.6 pA with Ga+ or In+ sources. Although unique applications of such low current probes have been demonstrated,) the stringent alignment requirements which they imposed made their routine use impractical. For instance, the occasional tendency of the LMIS to shift its emission pattern caused severe misalignment problems.

Sign in / Sign up

Export Citation Format

Share Document