- Exercise 1 20 Points Consider An Ion Thruster Working With Xenon The Following Characteristics And Properties Apply 1 (76.02 KiB) Viewed 25 times
question. Especially the Second one. Thanks
EXERCISE 1 (20 points). Consider an ion thruster working with xenon. The following characteristics and properties apply: • Screen and acceleration grid areas: As = Ag = 300 cm² Screen and acceleration grid transparencies: 05 = 0.70, 0 = 0.30 The grids operate at the charge-saturation limit • Main electric potential biases: psp = 40 V, ES = 1100 V, PEN = 150 V, N = 30 V Average electron density and temperature inside the chamber: ne = 4 . 10¹m³, Te = 3 eV Neutral mass flow crossing the grids: mns = 0.3 mg/s Determine: 1) The downstream beam current and ion velocity 2) The propellant utilization and the specific impulse 3) The distance between the two grids 4) The plasma density at the neutralizer section N. Note: neglect the plume divergence 5) The electron current density reaching the screen grid, jes