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Homework Help: Calculate the pitch of eletron cyclotron in b field.

  1. Feb 17, 2008 #1
    1. The problem statement, all variables and given/known data

    The uniform 26.0 mT magnetic field in the figure points in the positive z-direction. An electron enters the region of magnetic field with a speed of 5.50E6 and at an angle of
    30 deg. above the xy-plane.

    The problem defines the pitch to be the distance between the sucessive loops of the helix.

    radius = 1.04 mm

    2. Relevant equations

    3. The attempt at a solution

    I thought i could slove for the pitch by solving p= r*tan(30), i dont know, i have no experience solving this kind of problem.
    Last edited: Feb 17, 2008
  2. jcsd
  3. Feb 18, 2008 #2


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    Science Advisor

    I think you will get more response in the physics section than in the mathematics section so I am moving this post.
  4. Feb 18, 2008 #3
    The electron is moving with constant speed allong the z-direction. Do you know why?
    Between two sucessive loops the time is one period. Thus the pitch is the distance traveled by the electron in one period at z-direction.

    Can you calculated it, now?
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