PDF Publication Title:
Text from PDF Page: 400
390 Chapter 7 3. A Hall thruster has a plasma channel with a 15-cm outer diameter and a 10-cm inner diameter. Measurements made on the thruster indicate that the xenon plasma density in the channel is 5 1017 ions per m3, the electron temperature Te is 20 eV, and the radial magnetic field Br is 200 gauss (0.02 tesla). If the thruster is operated at a discharge voltage of 300 V, a. Whatisthebeampower? b. What is the electron Larmour radius rL ? c. What is the electron Hall parameter e ? d. If the thrust correction factor = 0.9 and the mass utilization efficiency m = 0.8 , what is the thrust and Isp? e. WhatistheHallcurrent? 4. A xenon Hall thruster has boron nitride walls with a linearly varying secondary electron yield with a value of 0.5 at zero electron energy and 2 for an electron energy of 100 eV. a. What is the equation for the secondary electron yield in terms of the electron energy? b. Find the equation for the secondary electron yield for a Maxwellian distribution of electron energies [hint: use Eq. (C-5)] in terms of the electron temperature Te . c. What is the electron temperature at which the electron flow to the wall is space-charge limited? d. Assuming nevB / nivi = 0.5 , what is the maximum sheath potential for non-space-charge-limited flow (Te less than the value found in part b)? 5. Assume that all the ions in a Hall thruster are produced by the Hall current ionizing the neutral gas in the channel. a. Neglecting the ion current to the wall as small so that all the ions produced become beam ions, what is the ratio of the Hall current to the beam current if the average electron temperature is 25 eV? (Hint: write the ion production rate in terms of the Hall current and use Appendix E for ionization and excitation collision cross sections.) b. For a xenon ion thruster with a mean radius of 9 cm, a radial magnetic field of 150 G, and a discharge voltage of 300 V, what is the ratio of the Hall current to the beam current?PDF Image | Fundamentals of Electric Propulsion: Ion and Hall Thrusters
PDF Search Title:
Fundamentals of Electric Propulsion: Ion and Hall ThrustersOriginal File Name Searched:
Goebel__cmprsd_opt.pdfDIY 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 |