{"title":"Compensation of the Vertical Overfocusing of the Beam during Its Extraction from U400M Cyclotron","authors":"I. A. Ivanenko, V. A. Semin, S. A. Krupko","doi":"10.1134/S1547477125700359","DOIUrl":null,"url":null,"abstract":"<p>Accelerated beams are extracts from U400M isochronous cyclotron by means of recharging on a thin carbon foil. Two passive magnetic channels are placed after the foil to correct radial dimension of the extracted beam during its passing through strong radial gradient of the fringe magnetic field. The trajectory of the beam after recharging at the foil crosses the valley-sector at an acute angle that leads to vertical overfocusing. This effect was not corrected in the original configuration of the extraction system, and led to strong aperture losses of the extracted beam. We have realized a method to compensate the vertical overfocusing of the beam by changing of the first passive magnetic channel configuration is realize.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 4","pages":"673 - 675"},"PeriodicalIF":0.4000,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of Particles and Nuclei Letters","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1547477125700359","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, PARTICLES & FIELDS","Score":null,"Total":0}
引用次数: 0
Abstract
Accelerated beams are extracts from U400M isochronous cyclotron by means of recharging on a thin carbon foil. Two passive magnetic channels are placed after the foil to correct radial dimension of the extracted beam during its passing through strong radial gradient of the fringe magnetic field. The trajectory of the beam after recharging at the foil crosses the valley-sector at an acute angle that leads to vertical overfocusing. This effect was not corrected in the original configuration of the extraction system, and led to strong aperture losses of the extracted beam. We have realized a method to compensate the vertical overfocusing of the beam by changing of the first passive magnetic channel configuration is realize.
期刊介绍：
The journal Physics of Particles and Nuclei Letters, brief name Particles and Nuclei Letters, publishes the articles with results of the original theoretical, experimental, scientific-technical, methodological and applied research. Subject matter of articles covers: theoretical physics, elementary particle physics, relativistic nuclear physics, nuclear physics and related problems in other branches of physics, neutron physics, condensed matter physics, physics and engineering at low temperatures, physics and engineering of accelerators, physical experimental instruments and methods, physical computation experiments, applied research in these branches of physics and radiology, ecology and nuclear medicine.
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