Cathode temperature reduction by addition of Barium in high power Lithium plasma thrusters

2000 ◽  
Author(s):  
James Polk
Keyword(s):  
High Power ◽  
Temperature Reduction ◽  
Lithium Plasma ◽  
Cathode Temperature ◽  
Plasma Thrusters

scholarly journals Токоперехватывающие сетки из анизотропного пиролитического графита в электронных пушках с металлопористым катодом

2019 ◽  
Vol 89 (9) ◽  
pp. 1464
Author(s):  
С.Д. Журавлев ◽  
В.И. Шестеркин
Keyword(s):  
High Power ◽  
Test Specimen ◽  
Electron Flow ◽  
Thermionic Emission ◽  
Emission Characteristics ◽  
Grid Structure ◽  
Power Devices ◽  
Dispenser Cathode ◽  
Cathode Temperature ◽  
Experimental Researches

Presented the results of experimental researches of anisotropic pyrolitic graphite application as a grid structure in high-power devices with the dispenser cathode. The emission characteristics of molybdenum, hafnium and anisotropic pyrolitic graphite in diodes and electron guns versus high-power electron flow, dissipated on test specimen and cathode temperature are given in the article. Also the grid structures made of anisotropic pyrolitic graphite are able to dissipate power of the electron flow 20 times more than grids made of molybdenum and 9 times more than grids made of hafnium without occurrence of spurious thermionic emission are shown in the article.

scholarly journals High Power Ion Heating in Helium and Hydrogen Plasmas for Advanced Plasma Thrusters

2009 ◽  
Vol 7 (ists26) ◽  
pp. Pb_35-Pb_39
Author(s):  
Akira ANDO ◽  
Tatsuya HAGIWARA ◽  
Masakazu DOMON ◽  
Takahiro TAGUCHI
Keyword(s):  
High Power ◽  
Ion Heating ◽  
Hydrogen Plasmas ◽  
Plasma Thrusters

High Power Plasma Thrusters in Space: European Mission Prospects

2002 ◽  
Author(s):  
Leonardo Biagioni ◽  
Mariano Andrenucci ◽  
Giorgio Saccoccia
Keyword(s):  
High Power ◽  
Plasma Thrusters

A Novel Package-integrated Cyclone Cooler for the Thermal Management of Power Electronics

2021 ◽  
Author(s):  
Rinaldo Miorini ◽  
Darin J Sharar ◽  
Arun V. Gowda ◽  
Cathleen Hoel ◽  
Bryan Whalen ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Power Electronics ◽  
Power Density ◽  
High Power ◽  
Two Phase Flow ◽  
Junction Temperature ◽  
Phase Flow ◽  
Two Phase ◽  
Temperature Reduction ◽  
The Impact

Abstract In order for electronics packaging power density to increase, innovations and improvements in heat transfer are required. Electrification of transportation has the potential for significant fuel and energy savings. Changing to an electrified drive train requires reliable and efficient power electronics to provide power conversion between AC motors and DC energy storage. For high power transportation systems like aircraft or heavy vehicles, the power density of these power electronics needs to be improved. Power density is also an enabler for high power military devices that must be used and transported via air, ground, and sea. This paper summarizes the outcome of a collaborative and multi-disciplinary research effort aimed at co-designing novel electronics cooling device that utilizes two-phase fluid flow. Two-phase flow cooling has been known for decades as well as the risks associated with it: critical heat flux, dry-out and thermal runaway. Our research de-risks the two-phase cooling phenomenon by swirling the flow to remove the bubbles from the wall and confining them at the core of the cooler. The combined effects of gas phase removal, enhanced nucleation and dramatic liquid film agitation and rupture have been quantified by our experiments: double the heat transfer coefficient with only 13% increase in pressure drop. Besides advanced fluid-dynamics, our Package Integrated Cyclone Cooler (PICCO) utilizes cutting edge packaging and additive manufacturing technology such as direct deposition of a metal substrate and circuits (dies) on a complex helical cooler that can only be manufactured via 3D printing. By co-designing and testing the cooler we have quantified the impact of the swirled flow on the junction temperature with respect to a conventional (non-swirl) two-phase-flow-cooled power electronics package. At steady state, our post-test thermal simulations predict a junction temperature reduction from 185°C to 75°C at the same power dissipation. When the heat load is unsteady (EPA Urban Drive Cycle), the junction temperature reduction is 140°C to 60°C.

Low recycling and high power density handling physics in the Current Drive Experiment-Upgrade with lithium plasma-facing components

2007 ◽  
Vol 14 (5) ◽  
pp. 056111 ◽  
Author(s):  
R. Kaita ◽  
R. Majeski ◽  
T. Gray ◽  
H. Kugel ◽  
D. Mansfield ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
Current Drive ◽  
High Power Density ◽  
Lithium Plasma ◽  
Plasma Facing Components

Facet temperature reduction by a current blocking layer at the front facets of high-power InGaAs/AlGaAs lasers

2003 ◽  
Vol 93 (3) ◽  
pp. 1848-1850 ◽  
Author(s):  
F. Rinner ◽  
J. Rogg ◽  
M. T. Kelemen ◽  
M. Mikulla ◽  
G. Weimann ◽  
...  
Keyword(s):  
High Power ◽  
Blocking Layer ◽  
Temperature Reduction ◽  
Current Blocking Layer ◽  
Current Blocking ◽  
A Current
Sign in / Sign up

Export Citation Format

Share Document