Speaker
Description
Operation of a high-intensity accelerator requires careful control of beam losses. Among all phenomena affecting the beam, the impact of misalignment of the LANSCE beam channel on beam dynamics has not been studied systematically. Laser tracker measurement of misalignment of the accelerating channel was done by the Mechanical Design Engineering Group of the Los Alamos Accelerator Operations and Technology Division. Results of measurements indicate significant deviation of axes of the accelerator in x- and y- directions with random variation of positions of accelerating and focusing elements around the axis. In order to determine the effect of experimentally measured misalignment on beam halo formation in the LANSCE linac, simulations of the high-energy part of the LANSCE linear accelerator were performed taking into account displacements and slopes of accelerating tanks, displacements of quadrupole lenses with nonlinear field components, measured RF field gradients in tanks and beam space charge. The paper presents the results of the study and comparison with experimental data of beam emittance growth and beam loss along the machine.
Funding Agency
The research presented in this paper was supported by the Laboratory Directed Research and Development program of Los Alamos National Laboratory under project number 20240177ER.
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