m********r
发帖数: 811 | 1 Space Shuttle
Assume the earth's magnetic field of 0.13 Gauss is used to make a storage
ring 190 km above the equator, where the vacuum is pretty good, and the
space shuttle can be used to perform experiments. What (total) energy
protons could be stored in it? The earth's radius is 6350 km.
Give the answer in GeV. | m********r
发帖数: 811 | 2 Minimum Opening Angle
Consider a particle beam of emittance (=phase space area occupied by the
beam) 4.8 mm*mrad. In a collider, this beam is compressed to a half-width of
44 micrometers. What is the minimum opening angle (half-divergence) in
degrees of the beam at the collision point?
【在 m********r 的大作中提到】
: Space Shuttle
: Assume the earth's magnetic field of 0.13 Gauss is used to make a storage
: ring 190 km above the equator, where the vacuum is pretty good, and the
: space shuttle can be used to perform experiments. What (total) energy
: protons could be stored in it? The earth's radius is 6350 km.
: Give the answer in GeV.
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