Recent Advance in Particle Accelerator Instrumentation

A special issue of Instruments (ISSN 2410-390X).

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 16625

Special Issue Editors


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Guest Editor
IJCLab, CNRS Université Paris-Saclay, F-91405 Orsay, France
Interests: particle accelerators instrumentation; diagnostics; laser-plasma acceleration; compton sources

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Guest Editor
Laboratory of Subatomic Physics and Cosmology (LPSC), CNRS-University Grenoble Alpes, 53 avenue des Martyrs, 38026 Grenoble, France
Interests: particle accelerators; accelerator driven systems; accelerator-based neutron source; photoinjectors; electron polarimetry

Special Issue Information

Dear Colleagues,

It is our pleasure to announce this Special Issue, devoted to Particle Accelerators Instrumentations.

Particle accelerators are the largest tools used in scientific research. Instrumentation is key to ensure the performances of these accelerators by enabling the monitoring of their operation.

This issue covers all aspects of instrumentation on particle accelerators, from classical beam diagnostics to advanced instrumentation.

Thus, we invite contributions in the form of expert comprehensive reviews or research articles dealing with particle accelerators instrumentation from a wide perspective.

Contributions are expected to address, but are not limited to, the following areas:

  • Beam diagnostics (including beam position monitors, charge monitor, beam size monitors, longitudinal profile monitors, coherent radiation monitors, etc.)
  • Machine detector interface in particle physics
  • Additive manufacturing for particle accelerators
  • Advanced diagnostics for novel accelerators
  • Compton sources
  • Charged particle sources
  • Reliability

Dr. Nicolas Delerue
Dr. Maud Baylac
Guest Editors

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Keywords

  • particle accelerators
  • beam diagnostics
  • instrumentation

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Published Papers (5 papers)

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Research

8 pages, 11906 KiB  
Article
First 3D Printed IH-Type Linac Structure—Proof-of-Concept for Additive Manufacturing of Linac RF Cavities
by Hendrik Hähnel and Ulrich Ratzinger
Instruments 2022, 6(1), 9; https://doi.org/10.3390/instruments6010009 - 28 Jan 2022
Cited by 5 | Viewed by 2836
Abstract
Additive manufacturing (AM or “3D printing”) has become a powerful tool for the rapid prototyping and manufacturing of complex part geometries. Especially interesting for the world of particle accelerators is the process of the 3D printing of stainless steel (and copper) parts. We [...] Read more.
Additive manufacturing (AM or “3D printing”) has become a powerful tool for the rapid prototyping and manufacturing of complex part geometries. Especially interesting for the world of particle accelerators is the process of the 3D printing of stainless steel (and copper) parts. We present a first prototype of a 433 MHz IH-type linac cavity with an internal drift tube structure manufactured by metal 3D printing. The prototype cavity has been constructed to act as a proof-of-concept for the technology. In this paper we present the concept of the cavity as well as first results of vacuum testing and materials testing. Full article
(This article belongs to the Special Issue Recent Advance in Particle Accelerator Instrumentation)
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5 pages, 909 KiB  
Communication
A Hard Copper Open X-Band RF Accelerating Structure Made by Two Halves
by Bruno Spataro, Mostafa Behtouei, Fabio Cardelli, Martina Carillo, Valery Dolgashev, Luigi Faillace, Mauro Migliorati and Luigi Palumbo
Instruments 2022, 6(1), 5; https://doi.org/10.3390/instruments6010005 - 15 Jan 2022
Cited by 2 | Viewed by 2390
Abstract
This communication focuses on the technological developments aiming to show the viability of novel welding techniques [...] Full article
(This article belongs to the Special Issue Recent Advance in Particle Accelerator Instrumentation)
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12 pages, 4184 KiB  
Article
First Proof-of-Concept Prototype of an Additive Manufactured Radio Frequency Quadrupole
by Toms Torims, Guntis Pikurs, Samira Gruber, Maurizio Vretenar, Andris Ratkus, Maurizio Vedani, Elena López and Frank Brückner
Instruments 2021, 5(4), 35; https://doi.org/10.3390/instruments5040035 - 29 Nov 2021
Cited by 12 | Viewed by 3049
Abstract
Continuous developments in additive manufacturing (AM) technology are opening up opportunities in novel machining, and improving design alternatives for modern particle accelerator components. One of the most critical, complex, and delicate accelerator elements to manufacture and assemble is the radio frequency quadrupole (RFQ) [...] Read more.
Continuous developments in additive manufacturing (AM) technology are opening up opportunities in novel machining, and improving design alternatives for modern particle accelerator components. One of the most critical, complex, and delicate accelerator elements to manufacture and assemble is the radio frequency quadrupole (RFQ) linear accelerator, which is used as an injector for all large modern proton and ion accelerator systems. For this reason, the RFQ has been selected by a wide European collaboration participating in the AM developments of the I.FAST (Innovation Fostering in Accelerator Science and Technology) Horizon 2020 project. The RFQ is as an excellent candidate to show how sophisticated pure copper accelerator components can be manufactured by AM and how their functionalities can be boosted by this evolving technology. To show the feasibility of the AM process, a prototype RFQ section has been designed, corresponding to one-quarter of a 750 MHz 4-vane RFQ, which was optimised for production with state-of-the-art laser powder bed fusion (L-PBF) technology, and then manufactured in pure copper. To the best of the authors’ knowledge, this is the first RFQ section manufactured in the world by AM. Subsequently, geometrical precision and surface roughness of the prototype were measured. The results obtained are encouraging and confirm the feasibility of AM manufactured high-tech accelerator components. It has been also confirmed that the RFQ geometry, particularly the critical electrode modulation and the complex cooling channels, can be successfully realised thanks to the opportunities provided by the AM technology. Further prototypes will aim to improve surface roughness and to test vacuum properties. In parallel, laboratory measurements will start to test and improve the voltage holding properties of AM manufactured electrode samples. Full article
(This article belongs to the Special Issue Recent Advance in Particle Accelerator Instrumentation)
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9 pages, 724 KiB  
Article
Relativistic versus Nonrelativistic Approaches to a Low Perveance High Quality Matched Beam for a High Efficiency Ka-Band Klystron
by Mostafa Behtouei, Bruno Spataro, Luigi Faillace, Martina Carillo, Alberto Leggieri, Luigi Palumbo and Mauro Migliorati
Instruments 2021, 5(4), 33; https://doi.org/10.3390/instruments5040033 - 10 Nov 2021
Cited by 3 | Viewed by 2553
Abstract
Advanced technical solution for the design of a low perveance electron gun with a high quality beam dedicated to high power Ka-band klystrons is presented in this paper. The proposed electron gun can be used to feed linear accelerating structures at 36 GHz [...] Read more.
Advanced technical solution for the design of a low perveance electron gun with a high quality beam dedicated to high power Ka-band klystrons is presented in this paper. The proposed electron gun can be used to feed linear accelerating structures at 36 GHz with an estimated input power of 20 MW, thus achieving an effective accelerating electric field in the (100–150) MV/m range. Additionally, in the framework of the Compact Light XLS project, a short Ka-band accelerating structure providing an integrated voltage of at least 15 MV, has been proposed for bunch-phase linearization. For the klystron, a very small beam dimension is needed and the presented electron gun responds to this requirement. An estimate of the rotational velocity at beam edge indicates that the diamagnetic field due to rotational currents are small compared to the longitudinal volume. A detailed analysis of how this has been achieved, including compression of the beam, rotation in the magnetic field, and analysis of the subsequently generated diamagnetic field has been discussed. Full article
(This article belongs to the Special Issue Recent Advance in Particle Accelerator Instrumentation)
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25 pages, 18439 KiB  
Article
Impact of Different Components and Boundary Conditions on the Eigenfrequencies of a Magnet–Girder Assembly
by Simone Andresen
Instruments 2021, 5(3), 29; https://doi.org/10.3390/instruments5030029 - 1 Sep 2021
Cited by 2 | Viewed by 4113
Abstract
Synchrotron radiation facilities are very important in different areas of fundamental and applied science to investigate structures or processes at small scales. Magnet–girder assemblies play a key role for the performance of such accelerator machines. High structural eigenfrequencies of the magnet–girder assemblies are [...] Read more.
Synchrotron radiation facilities are very important in different areas of fundamental and applied science to investigate structures or processes at small scales. Magnet–girder assemblies play a key role for the performance of such accelerator machines. High structural eigenfrequencies of the magnet–girder assemblies are required to assure a sufficient particle beam stability. The objective of the present parametric study was to numerically investigate and quantify the impact of different boundary conditions and components on the magnet–girder eigenfrequencies. As case studies, two 3 m long girder designs following the specifications of the PETRA IV project at DESY (German Electron Synchrotron, Hamburg, Germany) were selected. High magnet–girder assembly eigenfrequencies were achieved by, e.g., positioning the magnets close to the upper girder surface, increasing the connection stiffness between the magnets and the girder and between the girder and the bases, and positioning the girder support points as high as possible in the shape of a large triangle. Comparing the E/ρ ratio (E: Young’s modulus, ρ: material density) of different materials was used as a first approach to evaluate different materials for application to the girder. Based on the findings, general principles are recommended to be considered in the future girder design development processes. Full article
(This article belongs to the Special Issue Recent Advance in Particle Accelerator Instrumentation)
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