PDF Publication Title:
Text from PDF Page: 291
280 Chapter 6 cylindrical region before the chamfer, consistent with the predicted ion bombardment location in Fig. 6-22. The time required to produce this erosion pattern is not known since Fig. 6-23 shows a destructive analysis after the end of the test. In fact, the erosion pattern shown in the destructive analysis of the neutralizer cathode orifice after the 30,000-hour extended life test (ELT) [38] shown in Fig. 6-24 is nearly identical to the shorter-duration LDT result. The ELT cathode experienced nearly double the operation time of the LDT cathode at the full-power level, which did not further erode the orifice. The 1-D orifice model described above finds that the larger-diameter orifice reduced the neutral pressure and plasma density in the orifice by about a factor of four, which reduced the plasma potential increase along the orifice by a factor of two. The combination of a significantly lower ion bombardment flux, the lower ion energy, and the increase in inner surface area as the cylinder radius increases caused the erosion rate to fall to negligible levels once the orifice opened sufficiently. One might expect similar erosion behavior from discharge cathode orifices. Figure 6-25 shows the destructive analysis of the LDT discharge cathode orifice plate after 8200 hours at full power. There is no discernable erosion in the cross section. In this case, the 1-D model shows that the much larger initial orifice diameter reduced the neutral pressure, plasma density, and potential in the orifice to the point that the ion bombardment erosion became negligible (similar to the eroded neutralizer cathode orifice case). In addition, the model shows that electron multiplication is reduced due to the lower ionization rate, and so the insert plasma must produce more of the discharge current than in neutralizer cathodes. It is clear that a simple orifice-plasma model can illustrate Fig. 6-24. Neutralizer cathode orifice cross section showing the erosion pattern after the NSTAR 30,152-hour extended life test [38].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 (Standard Web Page)