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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Multipactor in Accelerating Cavities

Multipactor in Accelerating Cavities

Shemelin, Valery D.
Belomestnykh, Sergey A.

Hardcover

Series: Particle Acceleration and Detection

Technology & EngineeringPhysics

ISBN10: 3030494373
ISBN13: 9783030494377
Publisher: Springer Nature
Published: Aug 11 2020
Pages: 134
Weight: 0.84
Height: 0.38 Width: 6.14 Depth: 9.21
Language: English
Preface.- Introductory Overview.- Part I: Multipactor in a planar gap.- Existence zones for a multipactor discharge.- Introduction.- Distribution of the normal velocity components.- Analysis of the equation of motion.- Stability condition.- Returning electrons.- Energy constraints.- Conclusion.- Generalized phase stability in multipacting.- Introduction.- Distribution of initial velocities and the SEY = 1 boundary.- Stability condition for different points of the multipacting zone.- Other approaches to the phase stability in a flat gap.- Conclusion.- Ping-pong modes.- Introduction.- Boundaries of the ping-pong modes.- Stability boundaries.- Cutoff boundaries.- Lines of equal impact energy.- Boundaries of the two-surface MP and overlapping with the ping-pong MP.- Conclusion.- Simulation of multipactor in a planar gap.- General codes.- Codes ad hoc.- Part II: Multipactor in crossed RF fields.- Effect of the RF cavity magnetic field on multipactor in a gap.- Experimental cavity for 430 MHz.- Inclusion of magnetic field into equations of motion.- Multipactor near the cavity equator.- Introduction.- Fields near equator.- Dependence of the upper arc fields on the lower arc geometry.- Equations of motion.- Condition of stability.- Multipacting maps.- Deviations from the elliptic geometry.- Comparison with experiment.- Conclusion.- Belomestnykh.- One-point multipactor in crossed fields of RF cavities.- Introduction.- Fields and equations of motion in a known geometry with one-point MP.- Comparison of analytical calculations with simulations and experiment.- Influence of change of the surface electric field. Multipactor map.- Phase and space stability. Traveling multipactor.- Comparison of the equations of motion for MP1 and MP2.- Discussion and conclusions.- Part III: Multipacting-free cavities and transitions between cavities and beampipes.- Optimized shape cavities free of MP.- Introduction.- Elliptic geometry and surface fields.- Some definitions.- Method of optimization.- More constraints to the shape of the elliptic cavity.- An example of optimization for the TESLA cavity.- An example of optimization for the SNS elliptic cavity with bgeo = 0.81.- Multipactor consideration.- Conclusion.- Multipacting-free transitions between cavities and beam-pipes. Theorem on minimal electric field.- Introduction.- Cavity with transition from iris to a larger diameter beam-pipe.- Cavity with a tapered end port.- Mechanism of the motion.- Conclusion.

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