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1. pubs.aip.org › aip › rsiDesign of the Lanthanum hexaboride based plasma source for ...

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   Aug 7, 2023 · This source had a number of drawbacks, including a limited range of plasma density (≲4.0 × 10 12 cm −3), a limited discharge duration (∼10 ms), and susceptibility to poisoning following oxygen exposure. The new plasma source utilizes a 38 cm diameter lanthanum hexaboride (LaB 6) cathode, which has a significantly higher emissivity ...

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2. pubs.aip.org › aip › rsiA new large area lanthanum hexaboride plasma source

   pubs.aip.org › aip › rsi

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   Aug 16, 2010 · A new 18 × 18 cm 2 active area lanthanum hexaboride (LaB 6) plasma source for use in a dc discharge has been developed at UCLA. The cathode consists of four tiled LaB 6 pieces indirectly heated to electron emission (1750 ° C) by a graphite heater.

3. People also ask

   Is lanthanum hexaboride a thermionic material?

   • Lanthanum hexaboride (LaB 6) is a well known thermionic material (see for instance refs 1, 2, 3, 4, 5 among the many available). Its ability to emit electrons has been widely exploited in last 60 years since the pioneering work of Lafferty on sintered hexaboride ceramics 6.

   Lanthanum hexaboride for solar energy applications

   www.nature.com/articles/s41598-017-00749-w

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   Why is hexaboride used as a cathode?

   • Its ability to emit electrons has been widely exploited in last 60 years since the pioneering work of Lafferty on sintered hexaboride ceramics 6. It has been used to build hot cathodes for a large variety of applications, including electron guns in cathode tubes 7, cathodes for plasma production 8, 9 and electron microscopes 10, 11.

   Lanthanum hexaboride for solar energy applications

   www.nature.com/articles/s41598-017-00749-w

   See all results for this question

   Is LaB6 a thermionic material?

   • Moreover, LaB6 has also the appealing characteristics to be a thermionic material, so that it could act at the same time both as direct high-temperature solar absorber and as electron source, significantly reducing system complexity in future concentrating solar thermionic systems and bringing a real innovation in this field.

   Lanthanum hexaboride for solar energy applications

   www.nature.com/articles/s41598-017-00749-w

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   What is a large plasma device (LAPD)?

   • The LArge Plasma Device (LAPD): The LAPD-Upgrade plasma column has a maximum length of 18 meters and a 75-centimeter diameter. Plasmas of varying length can be explored by segmenting the device (i.e., inserting a terminating copper end plate at various axial locations). The confining magnetic field can achieve a steady-state value of up to 3.5 kG.

   Large Plasma Device - BaPSF

   plasma.physics.ucla.edu/large-plasma-device.html

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4. plasma.physics.ucla.edu › large-plasma-deviceLarge Plasma Device - BaPSF

   plasma.physics.ucla.edu › large-plasma-device

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   The ion temperature will be varied through the application of 100kW of ICRF power. Smaller, lanthanum-hexaboride (LaB6) cathodes, up to 20cm diameter can be used to created higher density (10^13/cm^3) enhancements in the main plasma column. The upgraded LAPD has unprecedented access.

5. pubmed.ncbi.nlm.nih.gov › 20815604A new large area lanthanum hexaboride plasma source - PubMed

   pubmed.ncbi.nlm.nih.gov › 20815604

   A new 18x18 cm (2) active area lanthanum hexaboride (LaB (6)) plasma source for use in a dc discharge has been developed at UCLA. The cathode consists of four tiled LaB (6) pieces indirectly heated to electron emission (1750 degrees C) by a graphite heater. A molybdenum mesh anode 33 cm in front of the LaB (6) accelerates the electrons ...

   • Author: C. M. Cooper, W. Gekelman, P. Pribyl, Z. Lucky

   • Publish Year: 2010

6. www.researchgate.net › publication › 372977938Design of the Lanthanum hexaboride based plasma source for ...

   www.researchgate.net › publication › 372977938

   Aug 7, 2023 · The new plasma source utilizes a 38 cm diameter lanthanum hexaboride (LaB6) cathode, which has a significantly higher emissivity, allowing for a much larger discharge power density, and is robust ...

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8. www.nature.com › articles › s41598/017/00749-wLanthanum hexaboride for solar energy applications - Nature

   www.nature.com › articles › s41598/017/00749-w

   Apr 6, 2017 · Lanthanum hexaboride (LaB 6) is a well known thermionic material (see for instance refs 1,2,3,4,5 among the many available). Its ability to emit electrons has been widely exploited in last 60 ...

9. ui.adsabs.harvard.edu › abs › 2010RScIA new large area lanthanum hexaboride plasma source - NASA/ADS

   ui.adsabs.harvard.edu › abs › 2010RScI

   A new 18×18 cm<SUP>2</SUP> active area lanthanum hexaboride (LaB6) plasma source for use in a dc discharge has been developed at UCLA. The cathode consists of four tiled LaB6 pieces indirectly heated to electron emission (1750 °C) by a graphite heater. A molybdenum mesh anode 33 cm in front of the LaB6 accelerates the electrons, ionizing a fill gas to create a 20×20 cm<SUP>2</SUP> nearly ...