| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| MOPSA02 | Experimental Tests of CW Resonance Accelerator With 7.5 MeV High Intensity Electron Beam | electron, cavity, experiment, injection | 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 | ||
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| TUPSB09 | Resonance Slow Extraction From Ion Synchrotron for Technological Application | extraction, synchrotron, septum, proton | 248 |
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| Third-order resonance slow extraction from synchrotron is the most common use extraction method for external target experiments nuclear physics, proton and heavy ion therapy, since it can provide relatively stable beams in long time. The principle of third-order resonant slow extraction is intentionally exciting the third-order resonance by controlling detuning and sextupole strength to gradually release particles from inside to outside stable separatrix. BINP develop the ion synchrotron for wide range of technological application. The present paper describes slow extraction method with exiting betatron oscillations by the transverse RF-field. Such extraction technique provides stable current extraction for entire extraction time. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB09 | ||
| About • | Received ※ 30 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 21 October 2021 | ||
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| WEPSC04 | Accelerating Structure of 8 MeV Electron Linac | electron, GUI, coupling, radiation | 346 |
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Linear resonance electron accelerator LU-10-20 is under operation in RFNC-VNIIEF since 1994*. LU-10-20 is aimed at carrying out radiation processing of materials and researching radiation processes. The energy of accelerated electrons is up to 10 MeV, the average beam power - up to 12 kW. This accelerator has demonstrated that it is highly useful for performing radiation researches and tests. As of today work is underway on modernization of LU-10-20 including its accelerating structure and RF power supply. Accelerating structure is aimed at electron beam acceleration up to nominal energy and consists of complicated resonance TW RF structure, which uncluded iris-loaded waveguide, input and output matching devices. The paper presents the electrodynamic calculation results of modernized accelerating structure, input and output matching devices, and also beam dynamics calculation results.
*N.V.Zavyalov et al. Commercial linear accelerator of electrons LU-10-20. Materials of the XV All-Union Seminar on Linear Accelerators of Charged Particles, Nucl. Phys. Res.No2, 3(29, 30),1997, p.39-41. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC04 | ||
| About • | Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 18 October 2021 | ||
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| FRA02 | Cyclotron of Multicharged Ions | cyclotron, injection, vacuum, radiation | 96 |
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| The JSC "NIIEFA" is designing a cyclotron system intended to accelerate ions with a mass-to-charge ratio of 3-7 in the energy range of 7.5-15 MeV per nucleon. The variety of ions, the range of changes in their energy, and the intensity of the beams provide conditions for a wide range of basic and applied research, including for solving a number of technological tasks. The cyclotron electromagnet has an H-shaped design with a pole diameter of 4 meters and a four-sector mag-netic structure. In the basic mode, the dependence of the induction on the radius corresponding to the isochronous motion is realized by turning on the main coil only through the shape of the central plugs, sector side plates, and sector chamfers. For other modes of isochronous ac-celeration, the current in the main coil is changed and cor-rection coils are tuned. The resonance system consists of two resonators with an operating frequency adjustable from 13 to 20 MHz. The final stage of the RF generator is installed close to the resonator and is connected to it by a conductive power input device. The external injection system generates and separates ions with a given A/z ratio. The injection energy is chosen such that the Larmor radius is constant, which allows us-ing an inflector of unchanged geometry for the entire list of ions. The transportation system forms beams of accelerated ions with specified parameters and delivers them to sample irradiation devices. Computer control of the cyclotron is provided. | |||
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Slides FRA02 [11.588 MB] | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA02 | ||
| About • | Received ※ 24 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 20 October 2021 | ||
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| FRA05 | Cyclotron System C-250 | proton, cyclotron, radiation, controls | 105 |
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| JSC "NIIEFA" is designing a cyclotron system that gen-erates intensive proton beams with final energy in the range of 30-250 MeV. We have adopted a non-standard technical solution: at the energy of less than 125 MeV negative hydrogen ions are accelerated with the extrac-tion of protons by the stripping device; at higher energies protons are accelerated, and the beam is extracted by a deflector and a magnetic channel. The isochronous de-pendence of the magnetic field on the radius for different final energies is provided by changing the current in the main coil and tuning the correction coils. The cyclotron electromagnet has an H-shaped design with a pole diameter of 4 meters, a four-sector magnetic structure, and high spirality sectors. The dees of the reso-nance system are formed by delta electrodes and placed in the opposite valleys; stems are brought outwards through holes in the valleys. The operating frequency range is 24-33.2 MHz. The power of the RF generator is 60 kW. The cyclotron complex is equipped with a branched beam transport system and target devices for applied re-search on the radiation resistance of materials. Computer control of the cyclotron and its associated systems is provided. | |||
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Slides FRA05 [6.105 MB] | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA05 | ||
| About • | Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021 | ||
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