spacex - Why will Starlink satellites use krypton instead of xenon …
The Starlink satellites, however, will use a different noble gas: krypton. It has a lower density, so the satellite fuel tanks need to be larger, and it offers less performance than xenon. But krypton can be bought at just one-tenth the cost of xenon, which matters if a company wants to fuel thousands of satellites. Price and production rate
What performance specification would be lower for Krypton than …
2019年5月18日 · The Starlink satellites, however, will use a different noble gas: krypton. It has a lower density, so the satellite fuel tanks need to be larger, and it offers less performance than xenon. But krypton can be bought at just one-tenth the cost of xenon, which matters if a company wants to fuel thousands of satellites. (emphasis added)
Does Krypton or Xenon produce more thrust in a Hall-effect …
2022年12月21日 · Does this then mean that while Krypton needs more power to operate, it achieves higher specific impulse because the electrons will have higher velocity when ionized? But then why is the overall thrust for Krypton lower? Wouldn't the above mean that for the same flow rate of fuel, at the same discharge voltage, Krypton produces more thrust?
How much krypton is stored on a Starlink satellite?
2020年8月20日 · How much krypton (fuel) is there for the krypton-powered ion thrusters on Starlink satellites and how long does it last?
physics - Why might krypton have a lower utilization fraction than ...
2020年5月31日 · The lower mass of krypton with respect to xenon also decreases the sputtering yield approximately by the square root of the mass ratio. If Hall thruster efficiency on krypton can be improved to approach that of xenon, a krypton thruster could benefit several interplanetary missions due to its higher specific impulse and longer lifetime.
spacex - How much krypton do Starlink satellites carry when they …
2020年11月27日 · Starlink satellites use krypton as propellant. This answer roughly estimates 2.3 kg of Krypton based on a total delta-V of 190 m/s and an exhaust velocity of 20,000 m/s. But how close is that to reality? Is it known how much propellant is loaded into a …
How much does it cost to fill an ion thuster with Xenon for a ...
2015年4月9日 · The Starlink constellation v1 satellites used Krypton for its ion thrusters. Starlink v2 satellites use Argon. Alibaba shows Krypton at around ~$100 / cubic meter, which is less than a tenth of the of the price volume wise. And Argon costs far less than Krypton.
Why do ion thrusters frequently use xenon as the reaction mass?
2015年5月2日 · From skimming the Wikipedia article on ion thrusters, I notice that xenon is frequently (though not exclusively) used as the reaction mass in systems that have actually been deployed - Deep Space 1,
ion thruster - How much of the world's xenon has been used in ...
2021年6月2日 · Krypton is far more common (~1 ppm, over 10x that of xenon), and is produced with similar strategies, so it is a lot cheaper than xenon, at 290 USD per kilogram. SpaceX is launching Starlink very fast, so they can't wait for a suitable xenon supply to show up. Xenon is commonly used only because it has a higher performance.
Delta-V of Starlink Satellites - Space Exploration Stack Exchange
2019年5月29日 · Choosing an arbitrary Isp of 2000 seconds (exhaust velocity of 20,000 m/s) it means that at least 2% of the satellite's mass would have to be krypton to do this, or at least 4.6 kg. At 3.8 g/liter at standard atmosphere, a bottle at 100 atmospheres for example would have to be say 12 liters, and also fairly heavy to safely hold the pressure.