Physics research and technology developments of electron string ion sources

Donets, D. E.; Donets, E. E.; Honma, T.; Noda, K.; Ramzdorf, A. Yu.; Salnikov, V. V.; Shutov, V.; Donets, E. D.

doi:10.1063/1.3678660

Cited by 11 publications

(6 citation statements)

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“…Design of such cryogenic cell has been elaborated and recently tested in JINR [6,7]. Which shows, that the cell exhibited expected above mentioned time and temperature parameters.…”

Section: Introductionmentioning

confidence: 95%

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Algorithm and simulation of heat conduction process for design of a thin multilayer technical device

Ayriyan¹,

Buša

Donets³

et al. 2016

Applied Thermal Engineering

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A model of a multilayer device with non-trivial geometrical structure and nonlinear dependencies of thermodynamic material properties at cryogenic temperatures is suggested. A considered device, called cryogenic cell, is intended for use in multicharged ion sources for pulse injection of gaseous species into ionization space of ion sources. The main requirement for the cryogenic cell operation is the permanent opening and closing for gaseous species injection in a millisecond range, while cell closing is provided by freezing of the gaseous specie at the outer surface of the cell and the cell opening -by the corresponding pulse heating of the cell surface up to definite temperature. The thermal behaviour of the device in a millisecond time range is simulated. The algorithm for solving the non-stationary heat conduction problem with a time-dependent periodical heating source is suggested. The algorithm is based on finite difference explicit-implicit method. The OpenCL realization of the algorithm is discussed. The optimal particular choice of the parameters to provide the required pulse temperature regime of the designed cryogenic cell for the chosen working gas is presented. Based on these results further optimization can be formulated.

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“…Design of such cryogenic cell has been elaborated and recently tested in JINR [6,7]. Which shows, that the cell exhibited expected above mentioned time and temperature parameters.…”

Section: Introductionmentioning

confidence: 95%

“…The initial-boundary value problem Eqs. (1)- (6) has been approximated by the following mixed explicit-implicit finite difference scheme (see [13,14]):…”

Section: Numerical Algorithmmentioning

confidence: 99%

Algorithm and simulation of heat conduction process for design of a thin multilayer technical device

Ayriyan¹,

Buša

Donets³

et al. 2016

Applied Thermal Engineering

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show abstract

“…The purpose of this work is to develop algorithms for simulation of the heat conduction process inside the so-called pulse cryogenic cell [1,2]. Such simulations are important for designing the cell that implements "the thermal gates" of a portion injection of working gases into the ionization chamber of a multiply charged ion source [3].…”

Section: Introductionmentioning

confidence: 99%

Parallel algorithm for numerical solution of heat equation in complex cylindrical domain

Ayriyan¹,

Buša²

2019

Discrete and Continuous Models

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In this article we present a parallel algorithm for simulation of the heat conduction process inside the so-called pulse cryogenic cell. This simulation is important for designing the device for portion injection of working gases into ionization chamber of ion source. The simulation is based on the numerical solving of the quasilinear heat equation with periodic source in a multilayered cylindrical domain. For numerical solution the Alternating Direction Implicit (ADI) method is used. Due to the non-linearity of the heat equation the simple-iteration method has been applied. In order to ensure convergence of the iteration process, the adaptive time-step has been implemented. The parallelization of the calculation has been realized with shared memory application programming interface OpenMP and the performance of the parallel algorithm is in agreement with the case studies in literature.

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“…ESIS KRION-6T is currently designed at LHEP JINR in order to produce heavy ions [3]. KRION-6T operation is based on step-by-step ionization of the ions by hitting with electrons of an electron string and the main task is to produce the Au 32+ ions for the NICA/MPD project.…”

Section: Introductionmentioning

confidence: 99%

“…The Electron String type of Ion Sources (ESIS), was developed, constructed and tested firstly in the Joint Institute for Nuclear Research [2]. ESIS KRION-6T is currently designed at LHEP JINR in order to produce heavy ions [3].…”

Section: Introductionmentioning

confidence: 99%