Author: Zeng, R.
Paper Title Page
TUPOJO09 High Power RF Conditioning of the ESS DTL1 356
 
  • F. Grespan, C. Baltador, L. Bellan, D. Bortolato, M. Comunian, E. Fagotti, M.G. Giacchini, M. Montis, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • F. Grespan, B. Jones, L. Page, A.G. Sosa, E. Trachanas, R. Zeng
    ESS, Lund, Sweden
  • D.J.P. Nicosia
    CERN, Meyrin, Switzerland
 
  The first tank of Drift Tube Linac (DTL) for the Eu­ro­pean Spal­la­tion Source ERIC (ESS), de­liv­ered by INFN, has been in­stalled in the ESS tun­nel in Sum­mer 2021. The DTL-1 is de­signed to ac­cel­er­ate a 62.5 mA pro­ton beam from 3.62 MeV up to 21 MeV. It con­sists of 61 ac­cel­er­at­ing gaps, al­ter­nate with 60 drift tubes equipped with Per­ma­nent Mag­net Quadru­pole (PMQ) in a FODO lat­tice. The re­main­ing drift tubes are equipped with di­pole cor­rec­tors (steer­ers), beam po­si­tion mon­i­tors (BPMs) or empty. The total length of the cav­ity is 7.6 m and it is sta­bi­lized by post cou­plers. Two wave­guide cou­plers feed the DTL with the 2.2 MW of RF power re­quired for beam op­er­a­tion, equally di­vided by RF power losses and beam power. This paper first pre­sents the main sys­tems re­quired for the DTL con­di­tion­ing. Then it sum­ma­rizes the main steps and re­sults of this high power RF con­di­tion­ing done at ESS to pre­pare the DTL for the con­se­quent beam com­mis­sion­ing.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO09  
About • Received ※ 15 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 15 September 2022
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TUPOJO10 Hardware Commissioning With Beam at the European Spallation Source: Ion Source to DTL1 360
TUOPA01   use link to see paper's listing under its alternate paper code  
 
  • B. Jones, R.A. Baron, C.S. Derrez, F. Grespan, V. Grishin, Y. Levinsen, N. Milas, R. Miyamoto, D.J.P. Nicosia, D. Noll, D.C. Plostinar, A.G. Sosa, E. Trachanas, R. Zeng
    ESS, Lund, Sweden
  • C. Baltador, L. Bellan, M. Comunian, F. Grespan, A. Palmieri
    INFN/LNL, Legnaro (PD), Italy
  • I. Bustinduy, N. Garmendia
    ESS Bilbao, Zamudio, Spain
  • L. Neri
    INFN/LNS, Catania, Italy
 
  The Eu­ro­pean Spal­la­tion Source (ESS) aims to build and com­mis­sion a 2 MW pro­ton linac ready for neu­tron pro­duc­tion in 2025. The nor­mal con­duct­ing sec­tion of the ESS linac is de­signed to ac­cel­er­ate a 62.5 mA pro­ton beam to 90 MeV at 14 Hz. The sec­tion con­sists of a mi­crowave ion source, Radio Fre­quency Quadru­pole (RFQ) and 5-tank Drift Tube Linac (DTL). All sec­tions are pro­vided to ESS by in-kind part­ners across Eu­rope. This paper re­ports the re­cent progress on the as­sem­bly, in­stal­la­tion, test­ing and com­mis­sion­ing of the ESS nor­mal con­duct­ing linac.  
slides icon Slides TUPOJO10 [2.397 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO10  
About • Received ※ 12 August 2022 — Revised ※ 15 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 03 September 2022
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TUPOPA04 First Beam Matching and Transmission Studies on the ESS RFQ 414
 
  • D. Noll, R.A. Baron, C.S. Derrez, E.M. Donegani, M. Eshraqi, F. Grespan, H. Hassanzadegan, B. Jones, Y. Levinsen, N. Milas, R. Miyamoto, D.C. Plostinar, A.G. Sosa, R. Zeng
    ESS, Lund, Sweden
  • A.C. Chauveau, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
 
  The Eu­ro­pean Spal­la­tion Source will be dri­ven by a 5 MW lin­ear ac­cel­er­a­tor, pro­duc­ing 2.86 ms long pro­ton beam pulses with a peak cur­rent of 62.5 mA at 14 Hz. Fol­low­ing the source com­mis­sion­ing in 2018 and 2019, the RFQ was suc­cess­fully con­di­tioned and sub­se­quently com­mis­sioned with beam in 2021. In this paper, we will pre­sent re­sults of stud­ies on beam match­ing to the RFQ, both for low and high cur­rent beam modes, and will com­pare these re­sults to model pre­dic­tions.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA04  
About • Received ※ 26 August 2022 — Accepted ※ 05 September 2022 — Issue date ※ 05 September 2022  
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TUPOPA05 RFQ Performance During RF Conditioning and Beam Commissioning at ESS 418
 
  • R. Zeng, G.S. Fedel, B. Jones, R. Miyamoto, D.J.P. Nicosia, D. Noll, A.G. Sosa, A.M. Svensson, E. Trachanas
    ESS, Lund, Sweden
  • M. Baudrier
    CEA-DRF-IRFU, France
  • A.C. Chauveau, M.J. Desmons, P. Hamel, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
  • F. Grespan
    INFN/LNL, Legnaro (PD), Italy
 
  RFQ at ESS has been suc­cess­fully gone through RF con­di­tion­ing, RF re-con­di­tion­ing and low duty cycle beam com­mis­sion­ing. RFQ ful­fills re­quired func­tions and over­all per­for­mance is sat­is­fac­tory. RF con­di­tion­ing, three RF re-con­di­tion­ings after LEBT in­ter­ven­tion and beam com­mis­sion­ing will be re­ported and RFQ per­for­mance dur­ing these pe­ri­ods will be de­scribed. RFQ per­for­mance in a large ex­tent is re­flected by dy­nam­ics and in­ter­ac­tions be­tween RF, cav­ity and beam. Thanks to ad­vanced hard­ware ca­pa­bil­i­ties and in­tel­li­gent soft­ware in­tel­li­gence, ob­ser­va­tion of those dy­nam­ics and in­ter­ac­tions are done in de­tailed level. Analy­sis of those dy­nam­ics and in­ter­ac­tion will be in­tro­duced. Some tech­niques to deal with chal­lenges re­sulted from those dy­nam­ics and in­ter­ac­tions will also be dis­cussed.  
poster icon Poster TUPOPA05 [25.281 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA05  
About • Received ※ 18 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 05 September 2022
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