The transverse space-charge force in tri-gaussian distribution

Ng, K.Y.

Fermi National Accelerator Laboratory

关键词: 43 Particle Accelerators;    Shape;    Space Charge Accelerators;    Accelerators;    Accelerators;   

DOI  :  10.2172/879032
RP-ID  :  FERMILAB-TM-2331-AD
RP-ID  :  AC02-76CH03000
RP-ID  :  879032

美国|英语

来源: UNT Digital Library

【 摘 要 】

In tracking, the transverse space-charge force can be represented by changes in the horizontal and vertical divergences, {Delta}x{prime} and {Delta}y{prime} at many locations around the accelerator ring. In this note, they are going to list some formulas for {Delta}x{prime} and {delta}y{prime} arising from space-charge kicks when the beam is tri-Gaussian distributed. They will discuss separately a flat beam and a round beam. they are not interested in the situation when the emittance growth arising from space charge becomes too large and the shape of the beam becomes weird. For this reason, they can assume the bunch still retains its tri-Gaussian distribution, with its rms sizes {sigma}{sub x}, {sigma}{sub y}, and {sigma}{sub z} increasing by certain factors. Thus after each turn, {sigma}{sub x}, {sigma}{sub y}, and {sigma}{sub z} can be re-calculated.