Jwj. Verschuur et al., Compact beam transport system for a 6 MeV electron beam to a race-track-microtron accelerator, NUCL INST A, 427(1-2), 1999, pp. 68-73
The design of a compact system for the transport of a 6 MeV electron beam f
rom a photo-cathode linac to a race-track-microtron is described. The high
quality of the electron beam has to be maintained during transport. The geo
metrical limitations make the system necessarily a compact one. The paramet
ers found by the application of rules for double achromaticity and a one-to
-one imaging of the system are used as starting values for simulations with
the code TRACE-3D. The slightly adjusted parameters are checked by calcula
tions with the particle tracking code PARMELA. Although a slight degradatio
n of the beam shows up, the system with four dipoles and a quadrupole have
enough flexibility to transport the beam under various conditions. Special
care is taken with the design of the dipoles. The finite element program AN
SYS is used for a detailed calculation of the field including the trajector
ies of the electrons. Results of the calculations lead to a slight adjustme
nt of the dipole design. (C) 1999 Elsevier Science B.V. All rights reserved
.