Three-dimensional electromagnetic simulations and tuning studies of an S-band traveling wave structure with a constant gradient type accelerating section and a constant impedance type bunching section.
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| Title: | Three-dimensional electromagnetic simulations and tuning studies of an S-band traveling wave structure with a constant gradient type accelerating section and a constant impedance type bunching section. |
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| Authors: | Dhingra, Rinky1,2 (AUTHOR) rinky@rrcat.gov.in, Kumar, Vinit1,2 (AUTHOR), Raturi, Sachin1 (AUTHOR) |
| Source: | Pramana: Journal of Physics. Jun2026, Vol. 100 Issue 2, p1-13. 13p. |
| Subjects: | Electron accelerators, Traveling waves (Physics), Computational electromagnetics, Manufacturing defects, Steele, Christopher, 1964- |
| Abstract: | A 9.5 MeV, 15 kW, 2π/3 mode S-band traveling wave (TW) electron linac with constant gradient (CG) type accelerating section, integrated with a constant impedance (CI) type bunching section, has been designed and developed at RRCAT for industrial applications. Since this was a new, non-uniform structure combining CI- and CG-type sections, it was prudent to perform end-to-end, three-dimensional (3D) electromagnetic (EM) simulations of the entire structure to validate the design. In this paper, we present a detailed 3D EM simulation of the full-length TW structure, integrated with input and output RF power couplers, using the 3D EM design software CST-MWS, and demonstrate that the desired field magnitude and phase profile are obtained within the integrated structure in the adopted design. The effect of manufacturing errors on the RF reflection and transmission properties of the structure, and on the amplitude and phase profile of the accelerating field in the linac, has been studied. To reduce the effect of geometrical errors on these RF properties, Steele's perturbation theory based tuning methodology, commonly discussed in the literature, has been adopted, with a refined formulation for field normalization derived in the paper to account for the non-uniformity in such structures. The tuning methodology has been tested in a simulation environment using CST-MWS, where first the geometrical errors are introduced into the structure, followed by estimating and applying the tuning in individual cells. Such studies will be useful for the future development of TW accelerating structures. [ABSTRACT FROM AUTHOR] |
| Copyright of Pramana: Journal of Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 193389919 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Three-dimensional electromagnetic simulations and tuning studies of an S-band traveling wave structure with a constant gradient type accelerating section and a constant impedance type bunching section. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Dhingra%2C+Rinky%22">Dhingra, Rinky</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> rinky@rrcat.gov.in</i><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Vinit%22">Kumar, Vinit</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Raturi%2C+Sachin%22">Raturi, Sachin</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Pramana%3A+Journal+of+Physics%22">Pramana: Journal of Physics</searchLink>. Jun2026, Vol. 100 Issue 2, p1-13. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electron+accelerators%22">Electron accelerators</searchLink><br /><searchLink fieldCode="DE" term="%22Traveling+waves+%28Physics%29%22">Traveling waves (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+electromagnetics%22">Computational electromagnetics</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+defects%22">Manufacturing defects</searchLink><br /><searchLink fieldCode="DE" term="%22Steele%2C+Christopher%2C+1964-%22">Steele, Christopher, 1964-</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A 9.5 MeV, 15 kW, 2π/3 mode S-band traveling wave (TW) electron linac with constant gradient (CG) type accelerating section, integrated with a constant impedance (CI) type bunching section, has been designed and developed at RRCAT for industrial applications. Since this was a new, non-uniform structure combining CI- and CG-type sections, it was prudent to perform end-to-end, three-dimensional (3D) electromagnetic (EM) simulations of the entire structure to validate the design. In this paper, we present a detailed 3D EM simulation of the full-length TW structure, integrated with input and output RF power couplers, using the 3D EM design software CST-MWS, and demonstrate that the desired field magnitude and phase profile are obtained within the integrated structure in the adopted design. The effect of manufacturing errors on the RF reflection and transmission properties of the structure, and on the amplitude and phase profile of the accelerating field in the linac, has been studied. To reduce the effect of geometrical errors on these RF properties, Steele's perturbation theory based tuning methodology, commonly discussed in the literature, has been adopted, with a refined formulation for field normalization derived in the paper to account for the non-uniformity in such structures. The tuning methodology has been tested in a simulation environment using CST-MWS, where first the geometrical errors are introduced into the structure, followed by estimating and applying the tuning in individual cells. Such studies will be useful for the future development of TW accelerating structures. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Pramana: Journal of Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s12043-026-03130-7 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Electron accelerators Type: general – SubjectFull: Traveling waves (Physics) Type: general – SubjectFull: Computational electromagnetics Type: general – SubjectFull: Manufacturing defects Type: general – SubjectFull: Steele, Christopher, 1964- Type: general Titles: – TitleFull: Three-dimensional electromagnetic simulations and tuning studies of an S-band traveling wave structure with a constant gradient type accelerating section and a constant impedance type bunching section. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Dhingra, Rinky – PersonEntity: Name: NameFull: Kumar, Vinit – PersonEntity: Name: NameFull: Raturi, Sachin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 03044289 Numbering: – Type: volume Value: 100 – Type: issue Value: 2 Titles: – TitleFull: Pramana: Journal of Physics Type: main |
| ResultId | 1 |
