In: Physics
1 Larmor radius and gyration frequency (10 P) Calculate the Larmor radius and the gyration frequency (4 P) for:
1. An electron in the Earth’s ionosphere at 300 km altitude, where the magnetic flux density is B ≈ 0.5 · 10−4 T, considering that the electron moves at the thermal velocity (p kT /m) with T = 1000 K. (1 P)
2. An oxygen ion O+ in the Earth’s ionosphere for the same conditions as above. Is there a difference in Larmor radius and gyration frequency between the ion and the electron? Explain. (3 P)
3. A 3.5 MeV He++ ash particle in an DT fusion reactor. Use the kinetic energy of the particle to calculate the velocity, assuming that v|| is negligible.