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Company Address:	Noflerstr. 534,9491 Ruggell,,Switzerland
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spacex - Why will Starlink satellites use krypton instead of xenon for . . .
To adjust position on orbit, maintain intended altitude, and deorbit, Starlink satellites feature Hall thrusters powered by krypton (emphasis added) Most of the electric propulsion systems that I've heard of use xenon
What performance specification would be lower for Krypton than for . . .
For krypton, you need much more energetic electrons than you would for xenon This significantly increases the erosion rate, which will shorten the life of the thruster
Does Krypton or Xenon produce more thrust in a Hall-effect thruster . . .
I am trying to figure out if Xenon or Krypton produces more thrust for a given weight flow rate of fuel when the engine operates at the same discharge voltages The information I find is mixed or I
What are the tradeoffs in propellant choices for ion electric based . . .
Think F = ma, where F in this case is the force of the electric field acting on the ion If you change fuels (say from xenon to krypton, which is lighter), but don't change field strengths, then F stays the same, while m decreases, which means a (acceleration on the ion) must be bigger
physics - Why might krypton have a lower utilization fraction than . . .
4 A comment below Why will Starlink satellites use krypton instead of xenon for electric propulsion? links to the 2011 preprint A Performance Comparison of Xenon and KryptonPropellant on an SPT-100 Hall Thruster; IEPC-2011-003 which explains that in this study using a SPT-100 Hall Thruster krypton had a lower utilization fraction than xenon
ion thruster - Space Exploration Stack Exchange
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
spacex - How much krypton do Starlink satellites carry when they are . . .
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 re
How much does it cost to fill an ion thuster with Xenon for a . . .
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
What is the fate of Krypton exhaust from Starlink thrusters?
If the thrusters have a specific impulse of 1500s, that means the krypton atoms are traveling roughly 15 km s when they exit the nozzle, which exceeds the escape velocity of earth
How much krypton is stored on a Starlink satellite?
How much krypton (fuel) is there for the krypton-powered ion thrusters on Starlink satellites and how long does it last?