【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
串列加速器是用来产生高能离子的装置.图中虚线框内为其主体的原理示意图,其中加速管的中部b处有很高的正电势U,a、c两端均有电极接地(电势为零).现将速度很低的负一价碳离子从a端输入,当离子到达b处时,可被设在b处的特殊装置将其电子剥离,成为n价正离子,而不改变其速度大小.这些正n价碳离子从c端飞出后进入一与其速度方向垂直的、磁感应强度为B的匀强磁场中,在磁场中做半径为R的圆周运动.已知碳离子的质量为m=2.0×10-26kg,U=7.5×105V,B=0.50T,n=2,基元电荷e=1.6×10-19C,求R.
![](https://cdn.shuashuati.com/imgs/4cfa2f937f438f3a09ec038f1a5bad81.jpg)
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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