Figure top tatron. Electrons are accelerated in a circular orbit in the xy plane and then withdrawn to strike the target T. The magnetic field B is along the z axis (the positive z axis is out of the page). The magnetic field B, along this axis varies sinusoidally as shown in Fig. 34-39b. Recall that the mag- netic field must (i) guide the electrons in their circular path and (ii) generate the electric field that accelerates the electrons. Which quarter cycle(s) in Fig. 34-39b are suitable (a) according to (i), (b) according to (ii), and (c) for oper-

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32. Figure 34-39a shows a top view of the electron orbit in a be-
tatron. Electrons are accelerated in a circular orbit in the ry
plane and then withdrawn to strike the target T. The magnetic
field B is along the z axis (the positive z axis is out of
the page). The magnetic field B, along this axis varies
sinusoidally as shown in Fig. 34-39b. Recall that the mag-
netic field must (i) guide the electrons in their circular path
and (ii) generate the electric field that accelerates the
electrons. Which quarter cycle(s) in Fig. 34-39b are suitable
(a) according to (i), (b) according to (ii), and (c) for oper-
ation of the betatron?
B.
3
(a) T-
(b)
FIGURE 34-39. Question 32.
Transcribed Image Text:32. Figure 34-39a shows a top view of the electron orbit in a be- tatron. Electrons are accelerated in a circular orbit in the ry plane and then withdrawn to strike the target T. The magnetic field B is along the z axis (the positive z axis is out of the page). The magnetic field B, along this axis varies sinusoidally as shown in Fig. 34-39b. Recall that the mag- netic field must (i) guide the electrons in their circular path and (ii) generate the electric field that accelerates the electrons. Which quarter cycle(s) in Fig. 34-39b are suitable (a) according to (i), (b) according to (ii), and (c) for oper- ation of the betatron? B. 3 (a) T- (b) FIGURE 34-39. Question 32.
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