TY - GEN
T1 - Anisotropy-driven instability in intense charged particle beams
AU - Startsev, Edward A.
AU - Davidson, Ronald C.
AU - Qin, Hong
PY - 2005
Y1 - 2005
N2 - We have generalized the analysis of the classical Harris instability to the case of a one-component intense charged particle beam with anisotropic temperature including the important effects of finite transverse geometry and beam space-charge. For a long, coasting beam, the delta-f particle-in-cell code BEST and the eighenmode code bEASt have been used to determine detailed 3D stability properties over a wide range of temperature anisotropy and beam intensity. A theoretical model is developed based on the Vlasov-Maxwell equations which describes the essential features of the linear stage of this instability. Both the simulations and the analytical theory clearly show that moderately intense beams are linearly unstable to short-wavelength perturbations provided the ratio of the longitudinal temperature to the transverse temperature is smaller than some threshold value.
AB - We have generalized the analysis of the classical Harris instability to the case of a one-component intense charged particle beam with anisotropic temperature including the important effects of finite transverse geometry and beam space-charge. For a long, coasting beam, the delta-f particle-in-cell code BEST and the eighenmode code bEASt have been used to determine detailed 3D stability properties over a wide range of temperature anisotropy and beam intensity. A theoretical model is developed based on the Vlasov-Maxwell equations which describes the essential features of the linear stage of this instability. Both the simulations and the analytical theory clearly show that moderately intense beams are linearly unstable to short-wavelength perturbations provided the ratio of the longitudinal temperature to the transverse temperature is smaller than some threshold value.
UR - https://www.scopus.com/pages/publications/33847130521
UR - https://www.scopus.com/inward/citedby.url?scp=33847130521&partnerID=8YFLogxK
U2 - 10.1109/PAC.2005.1590493
DO - 10.1109/PAC.2005.1590493
M3 - Conference contribution
AN - SCOPUS:33847130521
SN - 0780388593
SN - 9780780388598
T3 - Proceedings of the IEEE Particle Accelerator Conference
SP - 558
EP - 562
BT - Proceedings of the Particle Accelerator Conference, PAC 2005
T2 - Particle Accelerator Conference, PAC 2005
Y2 - 16 May 2005 through 20 May 2005
ER -