Fundamentals of Electric Propulsion: Ion and Hall Thrusters

PDF Publication Title:

Fundamentals of Electric Propulsion: Ion and Hall Thrusters ( fundamentals-electric-propulsion-ion-and-hall-thrusters )

Previous Page View | Next Page View | Return to Search List

Text from PDF Page: 341

Hall Thrusters 331 re=vth=m 8kTe=1 8mTeV< > 1 , ( 7 . 2 - 2 ) 2 where is the total collision frequency. The effect of this criterion is clear in the expression for the transverse electron mobility in Eq. (3.6-66), where a large value for the Hall parameter significantly reduces the cross-field electron mobility. In a similar manner, the ion Larmor radius must be much greater than the characteristic channel length so that the ions can be accelerated out of the channel by the applied electric field: ri=vi=M 2eVb=1 2MVb>>L, (7.2-3) c eB M B e where the ion energy is approximated as the beam energy. The ion Larmor radius, for example, in the 150-G radial field and at 300 eV of energy is about 180 cm, which is much larger than the channel or plasma dimensions. These equations provide a general range for the transverse magnetic field in the thruster channel. Even if the radial magnetic field strength doubles or ion energy is half of the example given, the criteria in Eqs. (7.2-1) and (7.2-3) are still easily satisfied. As mentioned above, the magnetic and electric field profiles are important in the thruster performance and life. The radial magnetic field typically is a maximum near the thruster exit plane, as shown in Fig. 7-4, and it is designed to fall near zero at the anode in dielectric-wall Hall thrusters [12]. Electrons from the cathode experience joule heating in the region of maximum transverse magnetic field, providing a higher localized electron temperature and ionization rate. The reduced electron mobility and high electron temperature in the strong

PDF Image | Fundamentals of Electric Propulsion: Ion and Hall Thrusters

fundamentals-electric-propulsion-ion-and-hall-thrusters-341

PDF Search Title:

Fundamentals of Electric Propulsion: Ion and Hall Thrusters

Original File Name Searched:

Goebel__cmprsd_opt.pdf

DIY PDF Search: Google It | Yahoo | Bing

NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info

IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info

Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info

Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info

Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info

NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info

Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info

CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP