WEPS088

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URL	https://doi.org/10.18429/JACoW-IPAC2025-WEPS088
Title	Wakefield and HOMs preliminary characterization of the four-quadrant multi-cell RF accelerating structure for the ASTERIX project
Authors	L. Faillace, A. Gallo, A. Liedl, A. Giribono, A. Falone, B. Spataro, C. Vaccarezza, D. Alesini, F. Cardelli, L. Piersanti, M. Bellaveglia, M. Migliorati, S. Bini Istituto Nazionale di Fisica Nucleare E. Chiadroni, L. Giuliano, L. Palumbo Sapienza University of Rome G. Silvi, S. Pioli Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati G. Sorbello University of Catania G. Mauro, G. Torrisi Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud L. Ficcadenti Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Sapienza University of Rome M. Carillo Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Sapienza University of Rome T. Abe, Y. Higashi High Energy Accelerator Research Organization V. Dolgashev SLAC National Accelerator Laboratory Y. Wei, Z. Huang University of Science and Technology of China
Abstract	The goal of the ASTERIX project, proposed at INFN-LNF and funded by the CSN5, is the first-time demonstration of a practical, meter-long X-band RF structure for real linear accelerators made of hard copper and four quadrants. Our joining technique will be the TIG welding for the prototype. During the feasibility study, in the first year, we will proceed to the RF cavity design of two full structures (~ 1m long and ~100 cells), one with optimized geometry for single-bunch and the other one for multi-bunch operation. We will perform the RF design optimization, including thermo-mechanical analysis, of the multi-cell TW cavity and the RF mode-launcher (which will be integrated with the cavity in the most compact way possible) for both structures’ geometries. In this paper, we show the preliminary characterization of the higher-order modes (HOMs) and wake-fields, which are detrimental for the particle beam with high-quality parameters typically accelerated in such structures, in the case of single-bunch operation. The electromagnetic designs will be performed by using the 3D numerical codes Ansys-HFSS and CST-Microwave Studio.
Paper	download: WEPS088.pdf
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Conference	16th International Particle Accelerator Conference
Series
Location	Taipei, Taiwan
Date	01-06 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN	978-3-95450-248-6
Online ISSN	2673-5490
Received	29 May 2025
Revised	05 June 2025
Accepted	05 June 2025
Issued	05 November 2025
DOI	10.18429/JACoW-IPAC2025-WEPS088
Pages	2402-2404
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.