Author: Hamel, P.
Paper Title Page
TUPOTK003 High Power RF Conditioning of the ESS RFQ 1189
 
  • O. Piquet, A.C. Chauveau, P. Hamel
    CEA-IRFU, Gif-sur-Yvette, France
  • M. Baudrier, M.J. Desmons
    CEA-DRF-IRFU, France
  • B. Jones, D. Noll, A.G. Sosa, E. Trachanas, R. Zeng
    ESS, Lund, Sweden
 
  The 352.21 MHz Radio Frequency Quadrupole (RFQ) for the European Spallation Source ERIC (ESS) has been delivered by the end of 2019 by CEA/IRFU. The RFQ is designed to accelerate a 70 mA proton beam from 75 keV up to 3.62 MeV. It consists of a 4-vane resonant cavity with a total length of 4.6 m. Two coaxial power loop couplers feed the RFQ with the 1.4 MW of RF power required for beam operation. This paper first presents the main systems required for the RFQ conditioning. Then it summarizes the main steps and results of this high power RF conditioning completed at ESS from June 9 to July 29, 2021 in order to achieve the nominal field for a pulse length of 3.2ms at the repetition rate of 14Hz.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOTK003  
About • Received ※ 08 June 2022 — Revised ※ 09 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 09 July 2022
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TUPOMS038 RFQ NEWGAIN: RF and Thermomechanical Design 1510
 
  • P. Hamel, N. Sellami
    CEA-IRFU, Gif-sur-Yvette, France
  • M.J. Desmons, O. Piquet, B. Prevet
    CEA-DRF-IRFU, France
 
  Funding: Agence Nationale de la Recherche (ANR)
A new injector called NEWGAIN will be added to the SPIRAL2 Linear Accelerator (LINAC), in parallel with the existing one. It will be mainly composed of an ion source and a Radio Frequency Quadrupole (RFQ) connected to the superconductive LINAC of SPIRAL2. The new RFQ will accelerate at 88.05 MHz particles with charge-over-mass ratio (Q/A) between 1/3 and 1/7, from 10 keV/u up to 590 keV/u. It consists of a 4-vane resonant cavity with a total length of 7 m. It is a CW machine that has to show stable operation, provide the request availability, have the minimum losses in order to provide the highest current to the superconductive LINAC and show the best quality/cost ratio. This paper will present the preliminary RF design and the thermomechanical study for this RFQ.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOMS038  
About • Received ※ 08 June 2022 — Revised ※ 10 June 2022 — Accepted ※ 13 June 2022 — Issue date ※ 27 June 2022
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WEPOTK001 Status of the Normal Conducting Linac at the European Spallation Source 2019
 
  • D.C. Plostinar, C. Amstutz, S. Armanet, R.A. Baron, E.C. Bergman, A.K. Bhattacharyya, B.E. Bolling, W. Borg, S. Calic, M. Carroll, J. Cereijo García, J. Christensson, J.D. Christie, H. Danared, C.S. Derrez, E.M. Donegani, S. Ekström, M. Eriksson, M. Eshraqi, J.F. Esteban Müller, K. Falkland, M.J. Ferreira, A. Forsat, S. Gabourin, A.A. Gorzawski, V. Grishin, P.O. Gustavsson, S. Haghtalab, V.A. Harahap, H. Hassanzadegan, W. Hees, J.J. Jamróz, A. Jansson, M. Jensen, B. Jones, M. Kalafatic, I. Kittelmann, H. Kocevar, S. Kövecses de Carvalho, E. Laface, B. Lagoguez, Y. Levinsen, M. Lindroos, A. Lundmark, M. Mansouri, C. Marrelli, C.A. Martins, J.P.S. Martins, S. Micic, N. Milas, R. Miyamoto, M. Mohammednezhad, R. Montaño, M. Muñoz, G. Mörk, D.J.P. Nicosia, B. Nilsson, D. Noll, A. Nordt, T. Olsson, L. Page, D. Paulic, S. Pavinato, S. Payandeh Azad, A. Petrushenko, J. Riegert, A. Rizzo, K.E. Rosengren, K. Rosquist, M. Serluca, T.J. Shea, A. Simelio, S. Slettebak, A.G. Sosa, H. Spoelstra, A.M. Svensson, L. Svensson, R. Tarkeshian, L. Tchelidze, C.A. Thomas, E. Trachanas, K. Vestin, R. Zeng, P.L. van Velze, N. Öst
    ESS, Lund, Sweden
  • L. Antoniazzi, C. Baltador, L. Bellan, M. Comunian, E. Fagotti, L. Ferrari, M.G. Giacchini, F. Grespan, M. Montis, A. Palmieri, A. Pisent, D. Scarpa
    INFN/LNL, Legnaro (PD), Italy
  • T. Bencivenga, P. Mereu, C. Mingioni, M. Nenni, E. Nicoletti
    INFN-Torino, Torino, Italy
  • I. Bustinduy, A. Conde, D. Fernández-Cañoto, N. Garmendia, P.J. González, G. Harper, A. Kaftoosian, J. Martin, I. Mazkiaran, J.L. Muñoz, A.R. Páramo, S. Varnasseri, A.Z. Zugazaga
    ESS Bilbao, Derio, Spain
  • A.C. Chauveau, P. Hamel, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
  • L. Neri
    INFN/LNS, Catania, Italy
 
  The construction of the ESS accelerator is in full swing. Many key components have been delivered from our in-kind partners and installation, testing and commissioning is making remarkable progress. The first machine section to be commissioned with beam is the Normal Conducting Linac (NCL). When completed, a 14 Hz, 2.86 ms proton beam up to 62.5 mA will be transported from the Ion Source, through the Low Energy Beam Transport (LEBT) line, the Radiofrequency Quadrupole (RFQ), the Medium Energy Beam Transport (MEBT) line and the five Drift Tube Linac (DTL) tanks up to 90 MeV where it will be injected in the first superconducting module of the machine. This paper will highlight recent progress across the NCL, present briefly the first commissioning results and discuss the upcoming phases as well as challenges in delivering a machine capable of meeting the requirements for a next generation spallation neutron facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOTK001  
About • Received ※ 13 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 02 July 2022  
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WEPOMS049 ESS RFQ Electromagnetic Simulations Using CST Studio Suite 2365
 
  • E. Trachanas, A. Bignami, N. Gazis, B. Jones, R. Zeng
    ESS, Lund, Sweden
  • G. Fikioris, E.N. Gazis, A. Kladas
    National Technical University of Athens, Zografou, Greece
  • P. Hamel, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
 
  The Radio Frequency Quadrupole (RFQ) of the European Spallation Source (ESS), operates at 352.21 MHz with an RF pulse length of 3.2 ms and repetition rate of 14 Hz. The RFQ focuses, bunches and accelerates the 62.5 mA proton beam from 75 keV up to 3.6 MeV. In an effort to study and compare the results from 3D electromagnetic codes, different models of the RFQ were simulated with CST Studio suite. This paper presents the selection of optimal parameters for simulation of the RFQ cavity voltage and comparison of the results with the RFQ design code Toutatis.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOMS049  
About • Received ※ 08 June 2022 — Revised ※ 09 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 17 June 2022
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