Trajectory of charged particles in a magnetic field?

  • Thread starter Adeonaja
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  • #1
Adeonaja
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A charge is entering magnetic field perpendicularly! Griffiths says it motion will be circular! But it is accelerated so it must radiate energy and it's motion should be spiral inward?
 

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  • #2
Nugatory
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Google for "synchrotron radiation"; it does indeed lose energy. Without an exact citation we can't be sure, but chances are that Griffith is considering a situation in which the energy loss to radiation and deviation from the zero-energy-loss trajectory are small enough to ignore.
 
  • #3
jtbell
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Google for "synchrotron radiation"
Or look in Griffiths's chapter on radiation near the end of the book. :oldwink:

In my copy of the 3rd edition, he considers synchrotron radiation in Problem 11.16 on page 465, which asks the student to derive the power loss when ##\vec v## and ##\vec a## are perpendicular.
 

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