Compact Particle Accelerators Technology

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Physics General".

Deadline for manuscript submissions: closed (20 January 2022) | Viewed by 10110

Special Issue Editors


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Guest Editor
The University of the Basque Country - UPV/EHU, 48940 Leioa (Bizkaia), Spain
Interests: compact particle accelerators; ion Sources; beam diagnostics; auxiliary systems

E-Mail Website
Guest Editor
The University of the Basque Country - UPV/EHU, 48940 Leioa (Bizkaia), Spain
Interests: scientific instrumentation; particle accelerators; ion sources; particle beams; electromagnetic systems instrumentation and control; radio frequency resonators; radio frequency systems

Special Issue Information

Dear Colleagues,

Although Particle Accelerators were historically linked almost exclusively to the High Energy Physics field, the transition of accelerator technology, from its use in basic science to applications more directly related to our everyday life, has been a very apparent trend in the last few decades, to the point that at present less than 1 per cent of the existing accelerators in the world are used for basic science, whereas the vast majority of the rest of them are small accelerators used for Education, Industry or Medicine among other applications. New technologies aimed at obtaining more compact designs for accelerator components, leading to smaller and more cost-effective solutions are a key element to strengthen their spread across an expanding wealth of applications. This technological effort includes new compact ion sources, particle beam transport and optics systems, laser and RF driven accelerating devices, superconducting components, or new beam diagnostics, instrumentation and controls, among other important technologies.

The aim of this Special Issue is to attract leading researchers in the area of compact particle accelerators in an effort to highlight the latest exciting developments in their technology and applications to new fields. Accepted contributions will include new designs, concepts, developments and applications of compact accelerator components with an emphasis on applications areas with direct impact in society, such as education, medicine and industry, among others.

Prof. Dr. Jorge Feuchtwanger
Prof. Dr. Victor Etxebarria
Guest Editors

Manuscript Submission Information

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Keywords

  • compact ion sources
  • particle beam transport
  • beam diagnostics
  • scientific instrumentation
  • accelerator control systems
  • RF cavities
  • power RF sources
  • superconducting RF
  • laser driven accelerators
  • accelerator technology education
  • medical accelerator technology
  • accelerators for industry
  • accelerators for materials science

Published Papers (5 papers)

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Research

11 pages, 9145 KiB  
Article
New Generation Compact Linear Accelerator for Low-Current, Low-Energy Multiple Applications
by Jorge Feuchtwanger, Victor Etxebarria, Joaquin Portilla, Josu Jugo, Iñigo Arredondo, Inari Badillo, Estibaliz Asua, Nicolas Vallis, Mikel Elorza, Beñat Alberdi, Rafael Enparantza, Iratxe Ariz, Iñigo Muñoz, Unai Etxebeste and Iñaki Hernandez
Appl. Sci. 2022, 12(9), 4118; https://doi.org/10.3390/app12094118 - 19 Apr 2022
Viewed by 1944
Abstract
A new compact linear proton accelerator project (named LINAC 7) for multiple low-current applications, designed and built in-house at the Beam Laboratory of the University of the Basque Country (UPV/EHU) is described. The project combines the University, a research technology center and a [...] Read more.
A new compact linear proton accelerator project (named LINAC 7) for multiple low-current applications, designed and built in-house at the Beam Laboratory of the University of the Basque Country (UPV/EHU) is described. The project combines the University, a research technology center and a private company with the aim of designing and building a compact, low-current proton accelerator capable of accelerating particles up to 7 MeV. In this paper, we present an overview of the accelerator design, summarize the progress and testing of the components that have been built, and describe the components that are being designed that will allow us to achieve the final desired energy of 7 MeV. Full article
(This article belongs to the Special Issue Compact Particle Accelerators Technology)
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8 pages, 3458 KiB  
Article
Numerical Simulation of a Hollow-Core Woodpile-Based Mode Launcher for Dielectric Laser Accelerators
by Giorgio Sebastiano Mauro, Giuseppe Torrisi, Andrea Locatelli, Alberto Bacci, Costantino De Angelis, David Mascali and Gino Sorbello
Appl. Sci. 2022, 12(5), 2609; https://doi.org/10.3390/app12052609 - 03 Mar 2022
Cited by 1 | Viewed by 1368
Abstract
Hollow core microstructures powered by infrared lasers represent a new and promising area of accelerator research, where advanced concepts of electromagnetism must be used to satisfy multiple requirements. Here, we present the design of a dielectric electromagnetic band gap (EBG) mode launcher–converter for [...] Read more.
Hollow core microstructures powered by infrared lasers represent a new and promising area of accelerator research, where advanced concepts of electromagnetism must be used to satisfy multiple requirements. Here, we present the design of a dielectric electromagnetic band gap (EBG) mode launcher–converter for high-power coupling in dielectric laser accelerators (DLAs). The device is based on a silicon woodpile structure, and it is composed of two perpendicularly coupled hollow-core waveguides—a transverse electric (TE)-like mode waveguide (excited from laser power) and a transverse magnetic (TM)-like mode (accelerating) waveguide—in analogy with the TE10-to-TM01 waveguide mode converters of radio frequency (RF) linear accelerators (LINACs). The structure is numerically designed and optimized, showing insertion losses (IL) <0.5 dB and efficient mode conversion in the operating bandwidth. The operating wavelength is 5 μm, corresponding to a frequency of ≈60 THz, in a spectral region where solid-state continuous-wave (CW) lasers exist and are actively developed. The presented woodpile coupler shows an interaction impedance in the order of 10 kΩ, high power handling and efficiency. Full article
(This article belongs to the Special Issue Compact Particle Accelerators Technology)
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6 pages, 24261 KiB  
Communication
Quality Factor Enhancement of 650 MHz Superconducting Radio-Frequency Cavity for CEPC
by Peng Sha, Weimin Pan, Jiyuan Zhai, Zhenghui Mi, Song Jin, Baiqi Liu, Chao Dong, Feisi He, Lingxi Ye, Xiangcong He and Shiao Zheng
Appl. Sci. 2022, 12(2), 546; https://doi.org/10.3390/app12020546 - 06 Jan 2022
Cited by 2 | Viewed by 1530
Abstract
Medium-temperature (mid-T) furnace baking was conducted at 650 MHz superconducting radio-frequency (SRF) cavity for circular electron positron collider (CEPC), which enhanced the cavity unloaded quality factor (Q0) significantly. In the vertical test (2.0 K), Q0 of 650 MHz cavity [...] Read more.
Medium-temperature (mid-T) furnace baking was conducted at 650 MHz superconducting radio-frequency (SRF) cavity for circular electron positron collider (CEPC), which enhanced the cavity unloaded quality factor (Q0) significantly. In the vertical test (2.0 K), Q0 of 650 MHz cavity reached 6.4 × 1010 at 30 MV/m, which is remarkably high at this unexplored frequency. Additionally, the cavity quenched at 31.2 MV/m finally. There was no anti-Q-slope behavior after mid-T furnace baking, which is characteristic of 1.3 GHz cavities. The microwave surface resistance (RS) was also studied, which indicated both very low Bardeen–Cooper–Schrieffer (BCS) and residual resistance. The recipe of cavity process in this paper is simplified and easy to duplicate, which may benefit the SRF community. Full article
(This article belongs to the Special Issue Compact Particle Accelerators Technology)
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15 pages, 5641 KiB  
Article
Two Design Options for Compact Linear Accelerators for High Flux Neutron Source
by Xiaowen Zhu, Claude Marchand, Olivier Piquet and Michel Desmons
Appl. Sci. 2022, 12(1), 386; https://doi.org/10.3390/app12010386 - 31 Dec 2021
Viewed by 2163
Abstract
We describe and compare two optimized design options of RF linear accelerators with different resonant frequencies at 162.5 MHz (f0) and 325 MHz (2∙f0). The RFQ + DTL linacs have been designed to provide 13 MeV acceleration to a [...] Read more.
We describe and compare two optimized design options of RF linear accelerators with different resonant frequencies at 162.5 MHz (f0) and 325 MHz (2∙f0). The RFQ + DTL linacs have been designed to provide 13 MeV acceleration to a proton beam for achieving a fast neutron yield of not lower than 1013 n/s via 9Be(p, n)9B reaction in pulsed-mode operation. Our design studies show that none of the two options is better than the other, but that the choice of operating frequency will mainly be determined by the accelerator length and RF cost consideration. This study can serve as a basis for the design of an initial stage of a new high brilliance Compact Accelerator-driven Neutron Source (CANS), aiming to use neutron scattering techniques for studying material properties in fundamental physics, materials science, nuclear energy, as well as for industries and societal challenges. Full article
(This article belongs to the Special Issue Compact Particle Accelerators Technology)
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13 pages, 4304 KiB  
Article
Electromagnetic Simulations and Measurements of the K-800 Superconducting Cyclotron RF Cavity at INFN-LNS
by Giuseppe Torrisi, Giorgio Sebastiano Mauro, Lorenzo Neri, Luciano Allegra, Antonio Caruso, Giuseppe Gallo, Alberto Longhitano, Mario Maggiore, Danilo Rifuggiato and Antonino Spartà
Appl. Sci. 2021, 11(13), 5995; https://doi.org/10.3390/app11135995 - 28 Jun 2021
Viewed by 2036
Abstract
In this paper, a complete three-dimensional (3D) RF model of the cyclotron coaxial resonator—including the coaxial sliding shorts, the “Liner” vacuum chamber, the coupler, the trimmer, and the high RF voltage “Dee” structures—has been developed. An eigenmode analysis was used to simulate the [...] Read more.
In this paper, a complete three-dimensional (3D) RF model of the cyclotron coaxial resonator—including the coaxial sliding shorts, the “Liner” vacuum chamber, the coupler, the trimmer, and the high RF voltage “Dee” structures—has been developed. An eigenmode analysis was used to simulate the tuning of the resonator in the operating frequency range of 15–48 MHz obtained by two movable sliding shorts and a trimmer. A driven analysis has been performed in order to compute the |S11| parameter (or impedance matching) of the cavity excited by a movable coaxial power coupler. The numerical simulations have been performed using the different peculiarities of two commercial tools, COMSOL Multiphysics and CST microwave studio. Experimental validation of the developed model is presented. The evidence of an unwanted electric field component, orthogonal to the accelerating field, was discovered and a mitigation is also proposed. The impact of the proposed modification was evaluated by using a 3D beam dynamics code under development in the framework of the Superconducting Cyclotron upgrade ongoing at INFN-LNS. Full article
(This article belongs to the Special Issue Compact Particle Accelerators Technology)
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