RuPAC2021 - List of Keywords (ion-source)

Paper	Title	Other Keywords	Page
MOPSA07	200 MeV Linear Electron Accelerator - Pre-Injector for a New Kurchatov Synchrotron Radiation Source	simulation, injection, linac, synchrotron	145
	I.A. Ashanin, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov MEPhI, Moscow, Russia I.A. Ashanin, V. Korchuganov, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov, V.A. Ushakov NRC, Moscow, Russia
	New linear electron accelerator (linac) with an energy of about 200 MeV (or 300 MeV in a high-energy version) is being proposed for injection into the booster synchrotron, which is being developed for the reconstruction of the SIBERIA-2 accelerator complex with the aim of upgrade to 3rd generation source at the NRC «Kurchatov Institute». A modernized linac and its specific elements layout will described in the report. The modeling of accelerating structure and optimization of electrodynamics characteristics and fields distribution and geometric in order to reduce the beam spectrum at the output of the linac was done. A step-by-step front-to-end beam dynamics simulation results will discuss.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA07
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 12 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA23	Machine Learning for the Storage Ring Optimization	synchrotron, radiation, synchrotron-radiation, emittance	169
	Ye. Fomin NRC, Moscow, Russia
	Funding: The reported study was funded by RFBR, project number 19-29-12039 The design and optimization of new lattice for modern synchrotron radiation sources are for the most part an art and highly dependent on the researcher skills. Since both modern existing and designing storage rings is very complex nonlinear system the researchers spend a lot of effort to solve their problems. In this work the use of machine learning technics to improve the efficiency of solving nonlinear systems optimization problems is considered.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA23
About •	Received ※ 06 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUB07	The Conceptual Design of the 7.5 MeV/u Light Ion Injector	cavity, rfq, linac, simulation	51
	S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova MEPhI, Moscow, Russia M.L. Smetanin, A.V. Telnov VNIIEF, Sarov, Russia N.V. Zavyalov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
	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.
	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
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TUPSB16	Calculation and Optimization of High-Energy Beam Transfer Lines by the Monte Carlo Method	proton, emittance, beam-transport, radiation	262
	D.A. Amerkanov, E.M. Ivanov, G.A. Riabov, V.A. Tonkikh PNPI, Gatchina, Leningrad District, Russia
	The calculation of high-energy beam lines consists of tracing of the proton beam trajectories along the transport channel from the source. The PROTON_MK program code was developed to carry out such calculations using the Monte Carlo method. The beam from the accelerator is introduced in the form of a multivariate Gaussian distribution in x,x’,z,z’,dp/p phase space. In the case when an absorber (absorber, air section, window in the channel, etc.) is installed in the transport channel the beam parameters after the absorber are calculated using the GEANT4. The output file of this code can be used as input for the program. The program allows calculation of any beam parameters - intensity, spatial or phase density, energy distribution, etc. The program includes a block for the optimization of beam parameters presented in a functional form. Random search method with learning for search correction based on analysis of intermediate results (so-called statistical gradient method) is used for obtaining the global maximum of a function of many variables. The program has been tested in calculations of the beam transport lines for IC-80 cyclotron and for the development of the beam line for ophthalmology.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB16
About •	Received ※ 21 September 2021 — Revised ※ 22 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 28 September 2021
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TUPSB34	New Lattice Design for Kurchatov Synchrotron Radiation Source	synchrotron, radiation, synchrotron-radiation, lattice	297
	Ye. Fomin, V. Korchuganov NRC, Moscow, Russia
	Funding: The reported study was partially funded by RFBR, project number 19-29-12039 Nowadays the upgrade project of the 2nd generation synchrotron radiation source operating at NRC Kurchatov Institute has been ongoing. The main aim of the project is to create a new synchrotron radiation source with the same 124 m circumference and providing synchrotron radiation properties inherent to the 3rd generation sources (emittance ~ 3 nm·rad). The new machine will consist of new storage ring with 2.5 GeV electron energy, full energy booster synchrotron and 0.2 GeV linac. The mandatory requirement for the project is to keep all currently operating beamlines. In this article we present the design challenges and approaches for this machine, the conceptional design and baseline lattice.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB34
About •	Received ※ 22 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 20 October 2021
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TUPSB35	3D Simulation Study and Optimization of Magnetic System of DECRIS Ion Source with the Pumping Frequency 28 GHz	solenoid, sextupole, ECR, operation	300
	V.M. Amoskov, E.I. Gapionok, V.P. Kukhtin, A.N. Labusov, E.A. Lamzin, A. Makarov, I.Yu. Rodin, A.V. Safonov, N. Shatil, D.B. Stepanov, E.R. Zapretilina NIIEFA, St. Petersburg, Russia S.L. Bogomolov, A.A. Efremov JINR, Dubna, Moscow Region, Russia S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia
	A superconducting magnet system for a 28 GHz ECR ion source DECRIS-SC2 was studied in order to select its parameters and optimize performance. Parametric magnetic models were performed for two design configurations, conventional ("sextupole-in-solenoid") and reversed ("solenoid-in-sextupole"). In the "sextupole-in-solenoid" design the racetrack coils of the sextupole magnet used for radial plasma confinement are located inside the solenoids producing the axial field. In the "solenoid-in-sextupole" design the coils arrangement is reversed. For both configurations, electromagnetic effect the booster and the steel poles on the magnet performance was investigated from the point of view critical parameters of the system ¿ currents, fields, and forces. Results of the parametric computations were used to optimize the geometry and sizes of the magnet as well as the magnetic shield, the booster, and the poles. For better reliability and validation of the result, computations were performed with two magnetostatic codes, KOMPOT and KLONDIKE, utilizing the differential and integral formulations, respectively. A comparison of the obtained parameters was used to select the candidate magnet configuration for further design and manufacture.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB35
About •	Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 04 October 2021 — Issued ※ 18 October 2021
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TUPSB36	High Intensity Calcium, Chromium and Titanium Ion Beams from the Permanent Magnet ECR Ion Source DECRIS-PM	cyclotron, ECR, experiment, ECRIS	303
	D.K. Pugachev, S.L. Bogomolov, A.E. Bondarchenko, A.A. Efremov, K. Gikal, K.I. Kuzmenkov, V.N. Loginov, V. Mironov JINR, Dubna, Moscow Region, Russia A.A. Protasov JINR/FLNR, Moscow region, Russia
	The first experiment at the Super Heavy Elements Factory (SHE) was launched at the end of 2020. The result of the experiment with a calcium ion beam and an Americium target is more than 100 events of the synthesis of Moscovium. The last two years have shown good capabilities of the Factory. These results allow us to start preparing for the synthesis of SHE with atomic number >118. For this experiment, we have to use heavier ion beams, such as titanium and chromium. The article describes the method, technique, and last experimental results on the production of metal ion beams such as 48Ca, 48Ti, 52Cr, and 54Cr ion beams at the DC-280 cyclotron from the DECRIS-PM ion source.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB36
About •	Received ※ 13 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 05 October 2021
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TUPSB37	Modernization of the ECR Ion Source DECRIS-2M. Results of the First Tests.	ECR, ECRIS, plasma, injection	307
	A.E. Bondarchenko, S.L. Bogomolov, A.A. Efremov, V.N. Loginov, V. Mironov, D.K. Pugachev JINR, Dubna, Moscow Region, Russia
	The article describes the design of the modernized ECR ion source DECRIS-2M. The upgrade consists in increasing the magnetic field to improve plasma confinement and improve the source parameters. The modernization also made it possible to increase the inner diameter of the plasma chamber and replace the coaxial microwave power input by a waveguide. Redesigned injection chamber significantly expands the possibilities of production ions of solids using different methods. The article also presents the first results of experiments production of Ar, Xe and Bi ion beams from a modernized ion source. The results demonstrate substantial increase of the ion beams intensity.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB37
About •	Received ※ 06 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 18 October 2021
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TUPSB38	Magnetic System With Variable Characteristics for a 2.45 GHz ECRIS	ECR, plasma, solenoid, operation	310
	M.S. Dmitriyev, K.G. Artamonov, O.A. Ivanov, M.I. Zhigailova MEPhI, Moscow, Russia
	Particle sources might be considered as an incredibly significant part of the accelerator system. Nowadays high-energy acceleration requires the types of ion sources implemented to produce beams of ions and protons of high energy and intensity. The current study is aimed to con-sider the design of the magnetic system of ECRIS with the operating frequency of 2.45 GHz for producing pro-tons and double-charged helium ions. The numerical simulation of the magnetic system was made by the Finite Element Method. The adjustment of the axial distribution of the magnetic field inside the plasma chamber is realized by shifting the ring magnets. Additional tuning of the axial magnetic field is presented by solenoids introduced for providing the required Binj and Bext adjustment as well as the Bmin control on the axis. For the simplification of the structure the alternating design of the ring magnets with trapezoidal components was considered. Furthermore, the magnetic system allows operating in both single-charged and multiply charged ions generation modes, thus the microwave source mode and the ECR mode are realizable for this configuration. Therefore, the study enables a better understanding of the feasibility of the ECRIS magnetic system with variable characteristics.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB38
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
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TUPSB39	Study of Space Charge Compensation Process of a 400 KeV Pulsed Hydrogen Ion Beam	electron, space-charge, plasma, focusing	313
	A. Belov, O.T. Frolov, S.A. Gavrilov, L.P. Nechaeva, A.V. Turbabin, V. Zubets RAS/INR, Moscow, Russia
	Funding: Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia A three grid energy analyzer of slow secondary ions with a twin analyzing grid is described. The analyzer has cylindrical geometry and Pi angle for recording of the slow ions. The analyzer has been used for measurements of degree of space-charge compensation (SCC) of a pulsed hydrogen ion beam with energy of 400 keV and peak beam current of 60 mA. Results of the measurements are presented and compared with theoretical estimations based on model in which the SCC degree is limited by heating of electrons in collisions with fast ions of the beam.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB39
About •	Received ※ 20 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
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TUPSB40	He⁺ Ion Source for the NICA Injection Complex	cathode, plasma, injection, LEBT	316
	B.V. Golovenskiy, V.A. Monchinsky JINR, Dubna, Moscow Region, Russia A.M. Bazanov, A.S. Bogatov, D.E. Donets, D.S. Letkin, D.O. Leushin, K.A. Levterov, V.V. Mialkovskiy, D.O. Ponkin, I.V. Shirikov JINR/VBLHEP, Dubna, Moscow region, Russia
	A mono-ion source of single-charged helium of high intensity has been created to confirm the declared parameters of Heavy Ion Linear Accelerator (HILAC) and for the injection into superconducting synchrotron (SC) Booster during the first run. The paper presents the design of the He⁺ ion source, test bench for the TOF measurements and acceleration beam developed at VBLHEP, JINR. The results of the tests of the source are presented. During the tests the intense beams of ions 50 mA of He⁺ were produced.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB40
About •	Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021
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TUPSB48	Optimization of the Geometric Characteristics of the Laser Beam in a Multi-Pass Scheme of Nonlinear Amplification of the Master Oscillator Illumination	laser, plasma, experiment, heavy-ion	327
	Yu.A. Satov, A. Balabaev, I.A. Khrisanov, T. Kulevoy, A.A. Losev, A. Shumshurov, A.A. Vasilyev ITEP, Moscow, Russia
	The paper presents the results of numerical simulation of the CO₂ MOPA laser scheme which is designed to generate powerful short radiation pulses in the ion source circuit. It is based on the nonlinear nature of the amplification of the master-oscillator pulse radiation, the front of which is formed by a nonlinear absorber. The paper considers the influence of the geometric parameters of the entrance beam in a four-pass amplification scheme. It is shown that for a fixed value of the small signal gain the maximum amplification effect is achieved with a certain formation of the spatial characteristics of the laser beam at the input to the amplifier. So some central uniform part of MO beam which has a Gaussian spatial profile is used in the telescopic amplifier. In this case, despite significant aperture losses, the maximum energy at the output of the amplifier is achieved with optimizing the beam diameter.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB48
About •	Received ※ 24 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
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WEA02	Acceleration the Beams of He⁺ and Fe14+ Ions by HILAC and its Injection into NICA Booster in its Second Run	booster, laser, injection, heavy-ion	65
	K.A. Levterov, V.P. Akimov, A.M. Bazanov, A.V. Butenko, D.E. Donets, D.S. Letkin, D.O. Leushin, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, D.O. Ponkin, I.V. Shirikov, A.O. Sidorin, A. Tuzikov JINR/VBLHEP, Dubna, Moscow region, Russia D. Egorov, A.R. Galimov, B.V. Golovenskiy, A. Govorov, V.V. Kobets, A.D. Kovalenko, V.A. Monchinsky, E. Syresin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia
	Injector of NICA accelerating facility based on the Heavy Ion Linear Accelerator (HILAC) is aimed to inject the heavy ions having atomic number A~200 and ratio A/Z - 6.25 produced by ESIS ion source accelerated up to the 3.2 MeV for the injection into superconducting synchrotron (SC) Booster. The project output energy of HILAC was verified on commissioning in 2018 using the beams of carbon ions produced with the Laser Ion Source and having ratio A/Z=6 that is close to the project one. Beams of He¹⁺ ions were injected into Booster in its first run and accelerated in 2020. In 2021 ions of Fe¹⁴⁺ produced with the LIS were injected and accelerated up to 200 MeV/u. Beam formation of Fe ions and perspectives of using LIS for the production the ions with high atomic mass A and ratio A/Z matching to HILAC input parameters are described.
	Slides WEA02 [12.908 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEA02
About •	Received ※ 07 October 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 14 October 2021
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FRB07	Transmission Studies With Ion Beams Within FAMA	target, quadrupole, light-ion, experiment	127
	Z.M. Jovanovic, R. Balvanovic, M.M. Ćosić, N. Neskovic, I. Teleski VINCA, Belgrade, Republic of Serbia
	Funding: Ministry of Education, Science and Technological Development of the Republic of Serbia. FAMA is a user facility for materials science with low energy ions beams in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. It includes a heavy ion source, a light ion source, two channels for modification of materials, and two channels for analysis of materials. Recently, designing of a channel for transmission studies within FAMA, the C3 channel, has begun. The initially planned studies are related to the rainbow effects with electrostatic very thin lenses (VTLs) and two-dimensional (2D) materials. In the former case, the main aim is to develop a method for generation of narrow ion beams, to be used, for example, in materials science and technology. The main aim in the latter case is to determine precisely the interaction potential of the projectile and target atoms. In both cases, the theoretical basis of the explorations is the theory of crystal rainbows. From the technological point of view, construction and use of the C3 channel includes the following challenges: (i) production and diagnostics of the narrow and parallel ion beams to be directed to the chosen VTLs and 2D materials, (ii) registration of the transmitted ion beams with high resolution 2D position sensitive detectors, (iii) preparation of the 2D materials and maintaining their cleanliness during the measurements, and (iv) providing the ultra-high vacuum conditions in measurements with the 2D materials.
	Slides FRB07 [11.209 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB07
About •	Received ※ 27 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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Paper

Title

Other Keywords

Page

MOPSA07

200 MeV Linear Electron Accelerator - Pre-Injector for a New Kurchatov Synchrotron Radiation Source

simulation, injection, linac, synchrotron

145

I.A. Ashanin, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov
MEPhI, Moscow, Russia
I.A. Ashanin, V. Korchuganov, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov, V.A. Ushakov
NRC, Moscow, Russia

New linear electron accelerator (linac) with an energy of about 200 MeV (or 300 MeV in a high-energy version) is being proposed for injection into the booster synchrotron, which is being developed for the reconstruction of the SIBERIA-2 accelerator complex with the aim of upgrade to 3rd generation source at the NRC «Kurchatov Institute». A modernized linac and its specific elements layout will described in the report. The modeling of accelerating structure and optimization of electrodynamics characteristics and fields distribution and geometric in order to reduce the beam spectrum at the output of the linac was done. A step-by-step front-to-end beam dynamics simulation results will discuss.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA07

About •

Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 12 October 2021

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA23

Machine Learning for the Storage Ring Optimization

synchrotron, radiation, synchrotron-radiation, emittance

169

Ye. Fomin
NRC, Moscow, Russia

Funding: The reported study was funded by RFBR, project number 19-29-12039
The design and optimization of new lattice for modern synchrotron radiation sources are for the most part an art and highly dependent on the researcher skills. Since both modern existing and designing storage rings is very complex nonlinear system the researchers spend a lot of effort to solve their problems. In this work the use of machine learning technics to improve the efficiency of solving nonlinear systems optimization problems is considered.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA23

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Received ※ 06 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUB07

The Conceptual Design of the 7.5 MeV/u Light Ion Injector

cavity, rfq, linac, simulation

51

S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova
MEPhI, Moscow, Russia
M.L. Smetanin, A.V. Telnov
VNIIEF, Sarov, Russia
N.V. Zavyalov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia

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.

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

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB16

Calculation and Optimization of High-Energy Beam Transfer Lines by the Monte Carlo Method

proton, emittance, beam-transport, radiation

262

D.A. Amerkanov, E.M. Ivanov, G.A. Riabov, V.A. Tonkikh
PNPI, Gatchina, Leningrad District, Russia

The calculation of high-energy beam lines consists of tracing of the proton beam trajectories along the transport channel from the source. The PROTON_MK program code was developed to carry out such calculations using the Monte Carlo method. The beam from the accelerator is introduced in the form of a multivariate Gaussian distribution in x,x’,z,z’,dp/p phase space. In the case when an absorber (absorber, air section, window in the channel, etc.) is installed in the transport channel the beam parameters after the absorber are calculated using the GEANT4. The output file of this code can be used as input for the program. The program allows calculation of any beam parameters - intensity, spatial or phase density, energy distribution, etc. The program includes a block for the optimization of beam parameters presented in a functional form. Random search method with learning for search correction based on analysis of intermediate results (so-called statistical gradient method) is used for obtaining the global maximum of a function of many variables. The program has been tested in calculations of the beam transport lines for IC-80 cyclotron and for the development of the beam line for ophthalmology.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB16

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Received ※ 21 September 2021 — Revised ※ 22 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 28 September 2021

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB34

New Lattice Design for Kurchatov Synchrotron Radiation Source

synchrotron, radiation, synchrotron-radiation, lattice

297

Ye. Fomin, V. Korchuganov
NRC, Moscow, Russia

Funding: The reported study was partially funded by RFBR, project number 19-29-12039
Nowadays the upgrade project of the 2nd generation synchrotron radiation source operating at NRC Kurchatov Institute has been ongoing. The main aim of the project is to create a new synchrotron radiation source with the same 124 m circumference and providing synchrotron radiation properties inherent to the 3rd generation sources (emittance ~ 3 nm·rad). The new machine will consist of new storage ring with 2.5 GeV electron energy, full energy booster synchrotron and 0.2 GeV linac. The mandatory requirement for the project is to keep all currently operating beamlines. In this article we present the design challenges and approaches for this machine, the conceptional design and baseline lattice.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB34

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Received ※ 22 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 20 October 2021

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TUPSB35

3D Simulation Study and Optimization of Magnetic System of DECRIS Ion Source with the Pumping Frequency 28 GHz

solenoid, sextupole, ECR, operation

300

V.M. Amoskov, E.I. Gapionok, V.P. Kukhtin, A.N. Labusov, E.A. Lamzin, A. Makarov, I.Yu. Rodin, A.V. Safonov, N. Shatil, D.B. Stepanov, E.R. Zapretilina
NIIEFA, St. Petersburg, Russia
S.L. Bogomolov, A.A. Efremov
JINR, Dubna, Moscow Region, Russia
S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia

A superconducting magnet system for a 28 GHz ECR ion source DECRIS-SC2 was studied in order to select its parameters and optimize performance. Parametric magnetic models were performed for two design configurations, conventional ("sextupole-in-solenoid") and reversed ("solenoid-in-sextupole"). In the "sextupole-in-solenoid" design the racetrack coils of the sextupole magnet used for radial plasma confinement are located inside the solenoids producing the axial field. In the "solenoid-in-sextupole" design the coils arrangement is reversed. For both configurations, electromagnetic effect the booster and the steel poles on the magnet performance was investigated from the point of view critical parameters of the system ¿ currents, fields, and forces. Results of the parametric computations were used to optimize the geometry and sizes of the magnet as well as the magnetic shield, the booster, and the poles. For better reliability and validation of the result, computations were performed with two magnetostatic codes, KOMPOT and KLONDIKE, utilizing the differential and integral formulations, respectively. A comparison of the obtained parameters was used to select the candidate magnet configuration for further design and manufacture.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB35

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Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 04 October 2021 — Issued ※ 18 October 2021

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TUPSB36

High Intensity Calcium, Chromium and Titanium Ion Beams from the Permanent Magnet ECR Ion Source DECRIS-PM

cyclotron, ECR, experiment, ECRIS

303

D.K. Pugachev, S.L. Bogomolov, A.E. Bondarchenko, A.A. Efremov, K. Gikal, K.I. Kuzmenkov, V.N. Loginov, V. Mironov
JINR, Dubna, Moscow Region, Russia
A.A. Protasov
JINR/FLNR, Moscow region, Russia

The first experiment at the Super Heavy Elements Factory (SHE) was launched at the end of 2020. The result of the experiment with a calcium ion beam and an Americium target is more than 100 events of the synthesis of Moscovium. The last two years have shown good capabilities of the Factory. These results allow us to start preparing for the synthesis of SHE with atomic number >118. For this experiment, we have to use heavier ion beams, such as titanium and chromium. The article describes the method, technique, and last experimental results on the production of metal ion beams such as 48Ca, 48Ti, 52Cr, and 54Cr ion beams at the DC-280 cyclotron from the DECRIS-PM ion source.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB36

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Received ※ 13 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 05 October 2021

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TUPSB37

Modernization of the ECR Ion Source DECRIS-2M. Results of the First Tests.

ECR, ECRIS, plasma, injection

307

A.E. Bondarchenko, S.L. Bogomolov, A.A. Efremov, V.N. Loginov, V. Mironov, D.K. Pugachev
JINR, Dubna, Moscow Region, Russia

The article describes the design of the modernized ECR ion source DECRIS-2M. The upgrade consists in increasing the magnetic field to improve plasma confinement and improve the source parameters. The modernization also made it possible to increase the inner diameter of the plasma chamber and replace the coaxial microwave power input by a waveguide. Redesigned injection chamber significantly expands the possibilities of production ions of solids using different methods. The article also presents the first results of experiments production of Ar, Xe and Bi ion beams from a modernized ion source. The results demonstrate substantial increase of the ion beams intensity.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB37

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Received ※ 06 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 18 October 2021

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TUPSB38

Magnetic System With Variable Characteristics for a 2.45 GHz ECRIS

ECR, plasma, solenoid, operation

310

M.S. Dmitriyev, K.G. Artamonov, O.A. Ivanov, M.I. Zhigailova
MEPhI, Moscow, Russia

Particle sources might be considered as an incredibly significant part of the accelerator system. Nowadays high-energy acceleration requires the types of ion sources implemented to produce beams of ions and protons of high energy and intensity. The current study is aimed to con-sider the design of the magnetic system of ECRIS with the operating frequency of 2.45 GHz for producing pro-tons and double-charged helium ions. The numerical simulation of the magnetic system was made by the Finite Element Method. The adjustment of the axial distribution of the magnetic field inside the plasma chamber is realized by shifting the ring magnets. Additional tuning of the axial magnetic field is presented by solenoids introduced for providing the required Binj and Bext adjustment as well as the Bmin control on the axis. For the simplification of the structure the alternating design of the ring magnets with trapezoidal components was considered. Furthermore, the magnetic system allows operating in both single-charged and multiply charged ions generation modes, thus the microwave source mode and the ECR mode are realizable for this configuration. Therefore, the study enables a better understanding of the feasibility of the ECRIS magnetic system with variable characteristics.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB38

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Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

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TUPSB39

Study of Space Charge Compensation Process of a 400 KeV Pulsed Hydrogen Ion Beam

electron, space-charge, plasma, focusing

313

A. Belov, O.T. Frolov, S.A. Gavrilov, L.P. Nechaeva, A.V. Turbabin, V. Zubets
RAS/INR, Moscow, Russia

Funding: Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
A three grid energy analyzer of slow secondary ions with a twin analyzing grid is described. The analyzer has cylindrical geometry and Pi angle for recording of the slow ions. The analyzer has been used for measurements of degree of space-charge compensation (SCC) of a pulsed hydrogen ion beam with energy of 400 keV and peak beam current of 60 mA. Results of the measurements are presented and compared with theoretical estimations based on model in which the SCC degree is limited by heating of electrons in collisions with fast ions of the beam.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB39

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Received ※ 20 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

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TUPSB40

He⁺ Ion Source for the NICA Injection Complex

cathode, plasma, injection, LEBT

316

B.V. Golovenskiy, V.A. Monchinsky
JINR, Dubna, Moscow Region, Russia
A.M. Bazanov, A.S. Bogatov, D.E. Donets, D.S. Letkin, D.O. Leushin, K.A. Levterov, V.V. Mialkovskiy, D.O. Ponkin, I.V. Shirikov
JINR/VBLHEP, Dubna, Moscow region, Russia

A mono-ion source of single-charged helium of high intensity has been created to confirm the declared parameters of Heavy Ion Linear Accelerator (HILAC) and for the injection into superconducting synchrotron (SC) Booster during the first run. The paper presents the design of the He⁺ ion source, test bench for the TOF measurements and acceleration beam developed at VBLHEP, JINR. The results of the tests of the source are presented. During the tests the intense beams of ions 50 mA of He⁺ were produced.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB40

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Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021

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TUPSB48

Optimization of the Geometric Characteristics of the Laser Beam in a Multi-Pass Scheme of Nonlinear Amplification of the Master Oscillator Illumination

laser, plasma, experiment, heavy-ion

327

Yu.A. Satov, A. Balabaev, I.A. Khrisanov, T. Kulevoy, A.A. Losev, A. Shumshurov, A.A. Vasilyev
ITEP, Moscow, Russia

The paper presents the results of numerical simulation of the CO₂ MOPA laser scheme which is designed to generate powerful short radiation pulses in the ion source circuit. It is based on the nonlinear nature of the amplification of the master-oscillator pulse radiation, the front of which is formed by a nonlinear absorber. The paper considers the influence of the geometric parameters of the entrance beam in a four-pass amplification scheme. It is shown that for a fixed value of the small signal gain the maximum amplification effect is achieved with a certain formation of the spatial characteristics of the laser beam at the input to the amplifier. So some central uniform part of MO beam which has a Gaussian spatial profile is used in the telescopic amplifier. In this case, despite significant aperture losses, the maximum energy at the output of the amplifier is achieved with optimizing the beam diameter.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB48

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Received ※ 24 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

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WEA02

Acceleration the Beams of He⁺ and Fe14+ Ions by HILAC and its Injection into NICA Booster in its Second Run

booster, laser, injection, heavy-ion

65

K.A. Levterov, V.P. Akimov, A.M. Bazanov, A.V. Butenko, D.E. Donets, D.S. Letkin, D.O. Leushin, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, D.O. Ponkin, I.V. Shirikov, A.O. Sidorin, A. Tuzikov
JINR/VBLHEP, Dubna, Moscow region, Russia
D. Egorov, A.R. Galimov, B.V. Golovenskiy, A. Govorov, V.V. Kobets, A.D. Kovalenko, V.A. Monchinsky, E. Syresin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia

Injector of NICA accelerating facility based on the Heavy Ion Linear Accelerator (HILAC) is aimed to inject the heavy ions having atomic number A~200 and ratio A/Z - 6.25 produced by ESIS ion source accelerated up to the 3.2 MeV for the injection into superconducting synchrotron (SC) Booster. The project output energy of HILAC was verified on commissioning in 2018 using the beams of carbon ions produced with the Laser Ion Source and having ratio A/Z=6 that is close to the project one. Beams of He¹⁺ ions were injected into Booster in its first run and accelerated in 2020. In 2021 ions of Fe¹⁴⁺ produced with the LIS were injected and accelerated up to 200 MeV/u. Beam formation of Fe ions and perspectives of using LIS for the production the ions with high atomic mass A and ratio A/Z matching to HILAC input parameters are described.

Slides WEA02 [12.908 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEA02

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Received ※ 07 October 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 14 October 2021

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FRB07

Transmission Studies With Ion Beams Within FAMA

target, quadrupole, light-ion, experiment

127

Z.M. Jovanovic, R. Balvanovic, M.M. Ćosić, N. Neskovic, I. Teleski
VINCA, Belgrade, Republic of Serbia

Funding: Ministry of Education, Science and Technological Development of the Republic of Serbia.
FAMA is a user facility for materials science with low energy ions beams in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. It includes a heavy ion source, a light ion source, two channels for modification of materials, and two channels for analysis of materials. Recently, designing of a channel for transmission studies within FAMA, the C3 channel, has begun. The initially planned studies are related to the rainbow effects with electrostatic very thin lenses (VTLs) and two-dimensional (2D) materials. In the former case, the main aim is to develop a method for generation of narrow ion beams, to be used, for example, in materials science and technology. The main aim in the latter case is to determine precisely the interaction potential of the projectile and target atoms. In both cases, the theoretical basis of the explorations is the theory of crystal rainbows. From the technological point of view, construction and use of the C3 channel includes the following challenges: (i) production and diagnostics of the narrow and parallel ion beams to be directed to the chosen VTLs and 2D materials, (ii) registration of the transmitted ion beams with high resolution 2D position sensitive detectors, (iii) preparation of the 2D materials and maintaining their cleanliness during the measurements, and (iv) providing the ultra-high vacuum conditions in measurements with the 2D materials.

Slides FRB07 [11.209 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB07

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Received ※ 27 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021

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