| Paper | Title | Page |
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| MOPSA02 | Experimental Tests of CW Resonance Accelerator With 7.5 MeV High Intensity Electron Beam | 132 |
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| CW resonance accelerator with high average power electron beam is developed at RFNC-VNIIEF. Electron energy range is varied from 1.5 to 7.5 MeV and average beam current is up to 40 mA. Electrons obtain the required energy by several passing of coaxial half-wave accelerating cavity. In this paper we present the results of electron beam dynamics simulation during its acceleration and transportation. The operating parameters of RF system, beam optics and bending magnets are determined. These parameters permit to obtain output beam with minimal current losses on each accelerating stage. As a result of carried out tests we obtained 7.5 MeV electron beam after five passes of accelerating cavity. The electron energy spectrum, average beam current, transverse beam dimensions were determined on each accelerating stage. Common beam current loss is under 10 %. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA02 | |
| About • | Received ※ 25 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 21 October 2021 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| MOPSA03 | Calculations of Ion Dynamics and Elecrodynamics Characteristics of 800 KeV/nucleon RFQ | 135 |
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| Accelerating structure with radio-frequency quadrupole focusing (RFQ) was observed in this research. The RFQ is aimed to bunch up, accelerate and focus 1 MeV/nucleon ions with A/Z from 1 to 3.2 (A - mass number of ion, Z - ion charge). The chemical elements from H⁺ to O5+ fill up this particle types range. The protons current is 2 mA and ion current is 1 mA. In this paper charged particle dynamics calculations, which essential for next electrodynamic cavity modeling, were performed. The electrodynamic model of 4-vane RFQ cavity with windows of magnetic connection was created. The dependence between frequency and cavity geometrics was defined. Topology of magnetic windows, which aimed to have the maximum mod separations, was determined. Different types of tanks were considered and corresponding electromagnetic characteristics were calculated. Tuning elements (plungers and spacers) influence on cavity was modeled. As a result optimized model of accelerating structure was realized. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA03 | |
| About • | Received ※ 20 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 18 October 2021 | |
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| TUB07 | The Conceptual Design of the 7.5 MeV/u Light Ion Injector | 51 |
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| The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/u ion beam with A/Z=1-3 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton anf He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81 MHz. Results of the beam dynamics simulations and the cavities design will presented in the report. | ||
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Slides TUB07 [5.210 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB07 | |
| About • | Received ※ 16 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 14 October 2021 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| TUPSB12 | Development of a Program Code for Calculation of Charged Particle Dynamics in RFQ | 256 |
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The calculation of charged particles dynamics is the initial stage in the development of an accelerator. The advancement of computer technology makes it possible to calculate particle dynamics using numerical methods with a required accuracy. During beam dynamics calculation it is necessary to take into account RF field force and self-induced Coulomb forces which also have an effect on charged particles. In this paper a model of «large particles» was chosen to simulate a space charge effect. To implement this model, a program code was written using parallel computing tools in the «C» programming language in the CUDA toolkit. The dynamics of ions with a ratio A / Z from 1 to 3.2 (A - the mass number, Z - the charge state of the ion) in the RFQ structure was calculated. The operating frequency of structure is 81.25 MHz, output energy is up to 820 keV / nucleon. Output beam characteristics (relative velocity, particle capture coefficient, beam profile, transverse emittances, longitudinal phase portrait) were determined. These results were verified by the BEAMDULAC-RFQ program*.
* Polozov S. M., Prob. of Atomic Sci. and Tech., 3 (79), 2012, pp. 131-136. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB12 | |
| About • | Received ※ 30 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |