Download Particle Accelerator Physics: Basic Principles and Linear by Helmut Wiedemann PDF

By Helmut Wiedemann

During this moment variation of Particle Accelerator Physics, Vol. 1, is principally a reprint of the 1st variation with no major alterations in content material. The bibliography has been up-to-date to incorporate more moderen development within the box of particle accelerators. With assistance from many observant readers a couple of misprints and blunders will be eradicated. the writer wish to exhibit his honest appreciation to all those that have mentioned such shortcomings and wel­ comes such details and the other suitable details sooner or later. the writer might additionally wish to convey his particular because of the editor Dr. Helmut Lotsch and his employees for editorial in addition to technical suggestion and aid which contributed significantly to the extensive attractiveness of this article and made a moment version of either volumes useful. Palo Alto, California Helmut Wiedemann November 1998 VII Preface to the 1st version the aim of this textbook is to supply a finished creation into the physics of particle accelerators and particle beam dynamics. Parti­ cle accelerators became very important study instruments in excessive power physics in addition to assets of incoherent and coherent radiation from the a long way infra crimson to challenging x-rays for simple and utilized examine. in the course of years of educating accelerator physics it turned transparent that the one most annoying drawback to get brought into the sector is the absence of an acceptable textbook.

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20) in order to obtain a travelling wave rather than a wave decaying exponentially along the waveguide for k; < o. 21) below which no wave can propagate in the waveguide. 22) The cutoff frequency is determined by the diameter of the waveguide and limits the propagation of electromagnetic waves in circular waveguides to wavelengths which are less than the diameter of the pipe. 2 b. 2 O. 5 Fig. 7. ) radial dependence of fields tially along the waveguide. 23) we get a phase velocity which exceeds the velocity of light and therefore any velocity a material particle can reach, Vph = c Jl-w;/w 2 > C.

In linear accelerators the particles are accelerated by definition along a straight path by either electrostatic fields or oscillating rf fields. 1 Charged Particles in Electric Fields In accelerator physics all forces on particles originate from electromagnetic fields. The interaction of such fields with charged particles will be discussed in a very general way to point out the basic process of particle accelera- 25 tion. For particle acceleration we consider only the electric-field term of the Lorentz force.

The cavity is excited to a TM o1o mode to produce an accelerating field. As a continuous stream of particles passes through the prebuncher, some particles get accelerated and some are decelerated. The manipulation of the continuous beam into a bunched beam is best illustrated in the phase space diagrams of Fig. 15. 15a shows the continuous particle distribution in energy and phase at the entrance of the prebuncher. Depending on the phase of the electric field in the prebuncher at the time of passage, a particle becomes accelerated or decelerated and the particle distribution at the exit of the prebuncher is shown in Fig.

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