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- spacex - Why will Starlink satellites use krypton instead of xenon for . . .
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 for . . .
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 thruster . . .
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?
- 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 reality? Is it known how much propellant is loaded into a Starlink satellite at launch?
- physics - Why might krypton have a lower utilization fraction than . . .
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
- Lifetime of Krypton thruster without shielding compared to Xenon . . .
It is argued here (by the user uhoh) that Krypton might have a higher erosion rate on the thruster compared to Xenon However, here is mentioned that the lifetime of Krypton-fueled thrusters might increase due to the fact that fewer doubly-ionized particles will occur (the 2nd ionization energy of Krypton is also higher than Xenon)
- What is the fate of Krypton exhaust from Starlink thrusters?
The Krypton exhaust from Starlink thrusters has an atomic mass over 80 Will this gas “work its way
- 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?
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