| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| MOPSA45 | Experimental Simulation of Volume Repainting Technique at Proton Synchrotron in Context of Spot Scanning Proton Therapy | target, radiation, proton, simulation | 192 |
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| Background: Reduction the influence of respiration-induced intrafractional motion of tissues is one of the main tasks of proton therapy with a scanning beam. Repainting is one of the techniques of motion compensation. It consists in multiple repeated irradiations of the entire volume or individual iso-energy layers with a dose that is a multiple of the prescribed dose. As a result, the dose is averaged, which leads to an increase in the uniformity of the dose field. Purpose: Experimental simulation of volume sequential repainting and dosimetric estimation of its capabilities in the context of spot scanning proton therapy (SSPT) using dynamic phantom. Materials and Methods: Simulation of respiration-like translational motion is performed using the non-anthropomorphic water dynamic phantom. Target of this phantom is compatible with EBT-3 films. Estimation of repainting technique is based on the analysis of average dose, dose uniformity in region of interests located within planning target volume, and dose gradients. Results: Repainting was estimated for motion with amplitudes of 2, 5, 10 mm with different number of iterations up to 10 at the prescribed dose of 6 Gy. This one increased the uniformity of the dose field from 85,9% to 96,0% at an amplitude of 10 mm and 10 iterations. Conclusions: Volume repainting improves the uniformity of dose distribution. However, the irradiation time increases, and the dose gradients deteriorate in proportion to the amplitude of motion. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA45 | ||
| About • | Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021 | ||
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| TUPSB28 | X-ray Thomson Inverse Scattering from Periodically Modulated Laser Pulses | laser, electron, radiation, scattering | 283 |
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Funding: This work is performed within the project supported by the Russian Foundation for Basic Research (RFBR), grant # 19-29-12036 Being a compact source of x-rays based on the Thomson backscattering Thomson source has potential to be used in medicine and biology and in other area where narrow band x-ray beams are essential. We suggest and investigate theoretically the idea to use laser pulses modulated with a short period in Thomson backscattering. The coherent radiation is obtained with intensity proportional to the squared number of micro-pulses in the whole laser pulse. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB28 | ||
| About • | Received ※ 23 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021 | ||
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| WEPSC13 | Accelerating Cavities with HOM Damping for USSR-4 Storage Ring | cavity, GUI, impedance, damping | 367 |
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| Preliminary results on accelerating cavities for USSR-4 facility (also known as SYLA - SYnchrotron and free-electron LAser) project are presented. This facility is under development by collaboration hosted by National Research Center "Kurchatov Institute". SYLA is synchro-tron radiation facility based on injector linac and 6 GeV storage ring. Beam energy loss in storage ring is to be compensated by several modified pillbox cavities. Cavity geometry features, its operation frequency choice and induced HOM parameters are discussed. HOM damping technique using corrugated cylindrical waveguides were studied. Longitudinal impedance values of HOM are presented for initial accelerating cavity and structure with waveguides. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC13 | ||
| About • | Received ※ 18 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 21 October 2021 | ||
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| WEPSC20 | Magnets Design for 2.5 GeV Booster Synchrotron | sextupole, dipole, booster, synchrotron | 386 |
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| The Project of complete modernization of the current accelerator complex is in progress in the NRC «Kurchatov Institute». The development of a new booster synchrotron as a part of the injection complex for a new 3-d generation synchrotron light source is included in the Project. The booster synchrotron has 24 dipoles, 60 quadrupoles, 48 sextupoles and 24 correctors. In order to obtain the required field quality, 2D- and 3D-simulations of magnets were carried out. The obtained geometry for each of the magnets is presented in the paper. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC20 | ||
| About • | Received ※ 18 September 2021 — Revised ※ 23 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 08 October 2021 | ||
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