Lecture13_Kim

Lecture13_Kim - Lecture 13-1 PHYS241 Question 1 October 4,...

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Lecture 13-1 PHYS241 – Question 1 – October 4, 2011 Are you here ? a.Yes b. No

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Lecture 13-2 Right-Hand Rule for (Review) F qv B 
Lecture 13-3 PHYS241 – Question 2 – October 4, 2011 A charge q is moving with velocity v in a region where magnetic field B is present. a. No force acts on the charge due to the magnetic field. b. A force that depends only on q acts on the charge. c. A force that depends only on B acts on the charge. d. A force that depends only on v acts on the charge. e. A force that depends on q , B , and v acts on the charge.

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Lecture 13-4 Charged Particle Entering Uniform Magnetic Field B (1) . mv r const qB qB vr m  Constant speed circular motion vB Mass spectrometer 2 v qB F ma qvB m v r rm  
Lecture 13-5 Charged Particle Entering Uniform Magnetic Field B (2) 22 2 v qB f rm qB f m    Cyclotron frequency proportional to B proportional to q/m independent of v 12 m T f qB Cyclotron period Mass spectrometer 2 2 11 qBr mv m q V m    2 m B r qV  2 v qB F ma qvB m v r  

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Lecture 13-6 Cyclotron "Dees" in constant magnetic field B Alternating voltage V is applied between the Dees at the orbital frequency f : "Magnetic Resonance Accelerator" 2 2 B m q f c c Particle will acquire an additional kinetic energy T = qV each time it crosses the gap (ie twice per revolution. . E=0 in Dees!).
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This note was uploaded on 12/07/2011 for the course PHYS 241 taught by Professor Wei during the Fall '08 term at Purdue University-West Lafayette.

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Lecture13_Kim - Lecture 13-1 PHYS241 Question 1 October 4,...

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