Using smooth approximation for beam dynamics investigation in superconducting linac

2007 ◽  
Author(s):  
E.S. Masunov ◽  
A.V. Samoshin
Keyword(s):  
Beam Dynamics ◽  
Smooth Approximation ◽  
Superconducting Linac

INVESTIGATION AND OPTIMIZATION OF LOW-ENERGY HEAVY-ION BEAM DYNAMICS IN PERIODIC AXISYMMETRICAL STRUCTURES WITH DC FOCUSING

2009 ◽  
Vol 24 (05) ◽  
pp. 843-856 ◽  
Author(s):  
VYACHESLAV SERGEEVICH DYUBKOV ◽  
EDUARD SERGEEVICH MASUNOV
Keyword(s):  
Ion Beam ◽  
Heavy Ion ◽  
Low Energy ◽  
Beam Dynamics ◽  
Smooth Approximation ◽  
Parameter Choice ◽  
Energy Beam ◽  
Beam Focusing ◽  
Spatially Periodic ◽  
Dynamics Stability

It is well-known that nonsynchronous harmonics of a RF field can focus particles. In order to focus ultra-low energy beam particles, a spatially periodic electrostatic field can be used, too. In this case the transverse focusing is provided by a periodic array of electrostatic lenses. This article is dedicated to questions of two high-current low-energy beam focusing types used in an injector-buncher of an ion linear accelerator, an application of a spatially periodic electrostatic focusing being examined for the first time. A two-dimensional nonlinear motion equation is derived in the Hamiltonian form in a smooth approximation. It allows us to study a correlation between the longitudinal and transverse ion beam dynamics at low energies. An investigation of the phase and transverse beam dynamics stability conditions in the initial part of the linac are given consideration. Conditions of the beam dynamics stability are found and analyzed. An approach to the field optimization problem is described. A method of the geometric parameter choice is worked out for a realization of the required field distributions in each structure. To verify the results of the beam dynamics stability analysis and optimized structure parameter choice, numerical simulations of low-energy heavy-ion beams are carried out.

Sign in / Sign up

Export Citation Format

Share Document