Preacceleration of the multicharged ions with the different A/Z ratios in single RFQ channel

Abstract

The preacceleration of multicharged ions with the different A/Z ratios extracted from electron cyclotron resonance (ECR) sources is discussed in this report. The capture ratio, emittances and current values of multicharged ions may be better if the ions are preaccelerated before their injection into a booster synchrotron. There is a considerable possibility of separate preacceleration of multicharged ions with different A/Z ratios in a single radio-frequency quadrupole (RFQ) channel. The magnitude of the injection energy into RFQ is about a few keV/u whereas the magnitudes of the injection energy into booster or following linac cascade are 300 keV/u. In addition in this paper we discuss the approach of the fast channel parameter optimization technique by using swarm computations and gradient descend for improving the capture ratio. The optimizations aimed at changing the regular part of the RFQ or matching section profile to improve the matching of the arbitrary oriented in phase space input beam.

Numerical solution of the problem of recovering parameters for the limit model of an uninsulated vacuum plane diode

“…It happens because of the fact that the edge characteristics with different current j x fall on the asymptotes (5 3d graph.). In the author's opinion, the approach of the fast channel parameter optimization technique [Altsybeyev et al, 2018] may also prove to be effective in the problem under consideration.…”

Development of the distributed information system for the cooperative work under the design and optimizationof charged particle accelerators

“…For example at present the main purposes of the discussed system is solving the problems related with the MegaScience NICA Accelerator Complex (Nuclotronbased Ion Collider fAcility) created at the Joint Institute for Nuclear Research (Dubna, Moscow region), aimed at solving the fundamental problems modern physics [Altsybeyev et al, 2018b;Altsybeyev et al, 2018c] and simulations of charged particles sources and linear accelerators [Ovsyannikov et al, 2014;Altsybeyev et al, 2018a;Altsybeyev, 2017].…”

Choice of accelerator type for Boron Neutron Capture Therapy system

“…It is possible to combine requirements for Lithium and Beryllium targets in single accelerator. In paper [Ovsyannikov et al, 2016;Altsybeyev et al, 2018] were formulated principles of separated acceleration protons and deuterons in single RFQ structure:…”

“…3. Matching section for case acceleration of two types particles must be optimized by methods described in papers [Ovsyannikov et al, 2009;Ovsyannikov et al, 2016;Altsybeyev et al, 2018]. Examples of modeling dynamics of ions H ± and D ± in single accelerating RFQ structure for different currents are given in [Ovsyannikov et al, 2016].…”