物理选修3-1《36带电粒子在有界磁场中的运动》课件(共47张)

1、带电粒子在有界磁场的运动OBAvvrrPMNBO2vv2230 B0vqBmvr0qBmqBmTt3526536030000Orr60030 qBmvrd0qBmvr Bqmvrd22 SOBPvO2tmqB2tmBqqBmvvtrvt2qBmqBmt2222300MNBrrO600Orr600eBmvr eBmvrd22 eBmeBmTt35265360300001eBmeBmTt326136060002eBmttt34212MNBO2RR2RMNO2RR2RMNO2R2R2RMNOR2R2RMNOD.A.B.C.2RR2RMNOOMNSBLeBmBeLmeBmvrOMNSBmeBLv2LP

2、Q)31 ( MOLNSsabL L.P1P2NcmqBmvr16cmrrPP7 .4330cos2021MNP POt=t1 t2=2T/=4mBq.arccos( )LBq2mvOP、OPQ Q1 1Q Q2 2MN2 2O OP P1v2v1o2o2 2SvvBPSvSQPQQ量变积累到一定程度发生质变，出现临界状态BqmBqmt22BdvOrrrdsin222)(yrdrBqmvrt30 BdvOrr300dr2rvmqvB2vqBdm2vdqBmT42vdvdTt341213603000a v11241122121qqmmrrqmqBmEqBprk2qmqBmqBmTt2222112

3、41122121qqmmttCEFDvBO)cos1 ( rdrvmqvB2)cos1 (dmeBmeBrveBmeBmt)(22222MNPQO0vMNPQOovBdabcvB量变积累到一定程度发生质变，出现临界状态（轨迹与边界相切）adcbmnBvr2O2+qvr2O1vr2O2+qvr2O1vrvmqvB2mqBLmqBrv4112222)2(LrLr452Lr 41Lr mqBLmqBrv4522vmqBL45mqBLv4粒子不打在极板上可能从左端穿出，也可能从右端穿出，必须全面分析问题2abcdvBrvmqvB2rmqBrvTt2qBmT21:2:2:aarrdc2:1:2:dcvm

4、qvBafde bcavM fdeORRv2212825qUmB L221mvqU mqUv2222)2()(RLRLLR85RvmqvB2V0OabcdV0Oabcd)30sin1 (201 rL31Lr mqBLmqBrv311300600Lr 2mqBLmqBrv22mqBLvmqBL3qBmqBmTt3526536030000V022BvvOOBvvOOrrrr22Bvv600600P(x y)yxqBmqBmTt32613606000RRx2160cos0RRy2360sin0)23,21(RRPOxyoOB0vAkqBmT2vqBmvrTt2O1O2O3O4OR/2RBxyO2O1

5、rr600qBmqBmTt32613606000Rr2mqBRmqBrv2221mvqU mRqBU222MNLAPBvBMNLAPBvB1RR2mveBrRr)2tan(22222)(2tan)(rBevmeBrmvrLrLPO2222222)2(tan1)2tan(2tanrBevmeBrmv)2arctan(22222rBevmeBrmv)2arctan(22222rBevmeBrmveBmvRtrrARrvmqvB2rL3qLmvqrmvB3LrR3330cos20) 1(2nOBRS0vqBmnqBmnnTnt) 1(22) 1(2) 1(2) 1(2n1tannRrOrrOBRS0v) 1(2nvnRnvrt1tan) 1(总) 1()12)(1nnn（总2nOrrOBRS0v060RRr330cot003613vRqBmTtrvmqvB2qRmvqrmvB300OBRS0vOrr090tvRqBmTt022414Rr rvmqvB2qRmvqrmvB00RRr330cot0r