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一、“回旋加速器”模型现行高中物理教材中介绍的“回旋加速器”的核心部分是两个D形的金属扁盒,如图1所示,两个D形盒之间留一个窄缝,在中心附近放有粒子源.D形盒装在真空容器中,整个装置放在巨大电磁铁的两极之间,磁场方向垂直于D形盒的底面.D形金属盒主要起静电屏蔽作用,使得盒内空间的电场极弱,可使粒子只受洛伦兹力作用做匀速圆周运动.设D形盒的半径为R,由
A. The “cyclotron” model The core of the “cyclotron” described in the current High School physics textbook is two D-shaped metal flat boxes, as shown in Figure 1, with one left between the two D-boxes Narrow slit with a particle source near the center D-shaped box mounted in a vacuum container with the entire device placed between the poles of a giant electromagnet in a direction perpendicular to the bottom of the D-shaped box D-shaped metal box primarily serves as an electrostatic shield Which makes the electric field in the space of the box very weak and enables the particles to make a constant circular motion only by the Lorentz force. Let the radius of the D-shaped box be R,