Facilities - Progress
status report of funded machines
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MOFAA1 LCLS-II: Status, Issues and Plans 1
 
  • M.C. Ross
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by Department of Energy contract DE-AC02-76SF00515
The Linac Coherent Light Source II (LCLS-II) project requires the assembly, test, and installation of 37 cryomodules (CM) in order to deliver a 4 GeV CW electron beam to the FEL undulators for production of both hard and soft X-ray pulses at a repetition rate of up to 1 MHz. SRF cavity performance in the 30+ tested CM exceeds gradient and cryogenic dynamic heat-load requirements (set at 16 MV/m and 10 W resp). In this talk we present microphonics, shipping, magnetic-flux exclusion, and field emission performance. The US funding agency, DOE, has recently approved an additional 20 CM for the extension of LCLS-II to 8 GeV. This paper will also include initial cavity and heat-load performance results for the extension project, LCLS-II-HE.
 
slides icon Slides MOFAA1 [30.146 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2019-MOFAA1  
About • paper received ※ 25 June 2019       paper accepted ※ 04 July 2019       issue date ※ 14 August 2019  
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MOFAA3 The FRIB SC-Linac - Installation and Phased Commissioning 12
 
  • J. Wei, H. Ao, S. Beher, B. Bird, N.K. Bultman, F. Casagrande, D. Chabot, W. Chang, S. Cogan, C. Compton, J. Curtin, K.D. Davidson, E. Daykin, K. Elliott, A. Facco, A. Fila, V. Ganni, A. Ganshyn, P.E. Gibson, T. Glasmacher, I. Grender, W. Hartung, L. Hodges, K. Holland, H.-C. Hseuh, A. Hussain, M. Ikegami, S. Jones, T. Kanemura, S.H. Kim, P. Knudsen, M.G. Konrad, J. LeTourneau, Z. Li, S.M. Lidia, G. Machicoane, P. Manwiller, F. Marti, T. Maruta, E.S. Metzgar, S.J. Miller, D.G. Morris, C. Nguyen, K. Openlander, P.N. Ostroumov, A.S. Plastun, J.T. Popielarski, L. Popielarski, J. Priller, M.A. Reaume, H.T. Ren, T. Russo, K. Saito, M. Shuptar, J.W. Stetson, D.R. Victory, R. Walker, X. Wang, J.D. Wenstrom, M. Wright, M. Xu, T. Xu, Y. Yamazaki, Q. Zhao, S. Zhao
    FRIB, East Lansing, Michigan, USA
  • K. Dixon, M. Wiseman
    JLab, Newport News, Virginia, USA
  • A. Facco
    INFN/LNL, Legnaro (PD), Italy
  • K. Hosoyama
    KEK, Ibaraki, Japan
  • M.P. Kelly
    ANL, Lemont, Illinois, USA
  • R.E. Laxdal
    TRIUMF, Vancouver, Canada
 
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
The Facility for Rare Isotope Beams (FRIB) superconducting (SC) driver linac is designed to accelerate all stable ions including uranium to energies above 200 MeV/u primarily with 46 cryomodules containing 324 quarter-wave resonators (QWR) and half-wave (HWR) resonators. With the newly commissioned helium refrigeration system supplying liquid helium to the QWR and solenoids, heavy ion beams including Ne, Ar, Kr and Xe were accelerated to the charge stripper location above 20 MeV/u with the first linac segment consisting of 15 cryomodules containing 104 QWRs of β=0.041 and 0.085 and 39 solenoids. Installation of cryomodules with β=0.29 and 0.53 HWRs is proceeding in parallel. Development of β=0.65 elliptical resonators is on-going supporting the FRIB energy upgrade to 400 MeV/u. This paper summarizes the SC-linac installation and phased commissioning status that is on schedule and on budget to the FRIB project.
 
slides icon Slides MOFAA3 [46.571 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2019-MOFAA3  
About • paper received ※ 23 June 2019       paper accepted ※ 30 June 2019       issue date ※ 14 August 2019  
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MOFAA4
ESS: SRF Systems, Overview and Status  
 
  • P. Pierini
    ESS, Lund, Sweden
 
  We report the status of the testing of SRF cryomodule at the ESS module test facilities and the preparation activities for the installation and commissioning of the ESS SRF Linac.  
slides icon Slides MOFAA4 [123.614 MB]  
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MOFAB1
MESA: The Mainz Energy Recovering Superconducting Accelerator  
 
  • F. Hug, D. Simon, T. Stengler, C.P. Stoll, S.D.W. Thomas
    KPH, Mainz, Germany
  • K. Aulenbacher
    HIM, Mainz, Germany
 
  Funding: This work is supported by the German Research Foundation (DFG) through the Clusters of Excellence "PRISMA" EXC 1098/2014 and "PRISMA +" EXC 2118/2019.
The Mainz Energy-Recovering Superconducting Accelerator (MESA) is currently under construction at Johannes Gutenberg-University Mainz. It is a mulit-turn ERL for particle and nuclear physics experiments. As the centerpiece for acceleration a turn-key solution was chosen. Two modified ELBE/Rossendorf-type cryomodules will accelerate the electrons up to 25 MeV per turn. The modules will be operated in cw at an accelerating gradient of 12.5 MV/m. The modifications comprise of an integration of a piezo tuner system and a better thermal connection of the HOM antennas for allowing high beam current in cw operation. Site acceptance tests of both modules have been carried out at the Helmholtz Institute Mainz (HIM) and by now the first cryomodule was successfully operated at design gradient and could be accepted. This talk will cover the experiences with a turn-key solution made by industry and will show the results of the site acceptance tests.
 
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MOFAB2
SRF Status of the SHINE Project at Shanghai  
 
  • H.T. Hou
    SINAP, Shanghai, People’s Republic of China
  • J.F. Chen, X. Hu, Y. Liu, Z.Y. Ma, S. Sun, D. Wang, L. Yin, S.J. Zhao, Y.B. Zhao
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
 
  The talk will mainly introduce the progress of the SHINE project in China. It is scheduled to build SHINE project in seven years which includes a superconducting rf acceleractor based on TESLA technology. From 2018, SHINE started the prototypes R&D in China, including not only the cavities fabrication, but also the surface treatment methods to reach high Q performance. The preparition of test facility will be introduced, too. The plan and latest results will be reported in the talk.  
slides icon Slides MOFAB2 [10.509 MB]  
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MOFAB3
SRF Status of the RAON Heavy Ion Accelerator Project  
 
  • H.C. Jung, H. Jang, Y. Kim, Y.K. Kwon
    IBS, Daejeon, Republic of Korea
 
  Quarter-wave resonators (QWR), Half-wave resonators (HWR)are adopted for the low energy superconducting linear accelerator of RAON, two types Single spoke resonators(SSR type1, SSR type2) are for the High energy. The performance tests for the prototypes of QWR, HWR cryomodules are carried and the designed goals are achieved. About 130 QWR/HWR cavities and 56 modules shall be produced and tested within 2020. For the cryogenic tests, facilities are constructed with 5 module-test bunkers and 5 cavity-test pits. First one cryomodule with 3 SSR1 cavities will be tested in this year and two cryomodules with 6 SSR2 cavities will be tested within the first quarter of the next year.  
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MOFAB5
Status and Challenges of the MYRRHA SRF Linac  
 
  • D. Vandeplassche
    SCK•CEN, Mol, Belgium
 
  The MYRRHA project aims at realizing a demonstrator Accelerator Driven System (ADS), of which the essential goal is to provide an optimized path towards transmutation. This allows to greatly reduce the burden of long lived nuclear waste originating from fission power plants. The specific ADS application requires a CW driver linac with an exceptionally high beam-MTBF of 250 hours, a beam failure corresponding to a beam trip longer than 3 s. The key feature for obtaining this level of reliability is fault tolerance. It is essentially provided through the serial redundancy that the highly modular structure of the superconducting linac combined with adequate operational margins offers. Phase 1 of MYRRHA will see the construction of the 100 MeV linac based on one family of β=0.37 superconducting 2-gap spoke cavities. The evaluation of the fault tolerance mechanism will be a major topic of this linac’s exploitation.  
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TUP036 Commissioning of Klystron Transmitters with 270 kWCW at 1.3 GHz 499
 
  • B. Schriefer, W. Anders, A. Heugel, H. Hoffmann, G. Mielczarek, H. Stein
    HZB, Berlin, Germany
 
  In Berlin-Adlershof the Helmholtz-Zentrum Berlin (HZB) is constructing the energy recovery linac ’BERLinPro’. Three klystron transmitters each 270 kWCW at 1.3 GHz are installed at the injection path of the ERL. The RF plant includes circulators and water loads. This paper describes the commissioning of the first klystron, calibration of the RF level control system as well as comparison with calorimetric output power measurements to verify the results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2019-TUP036  
About • paper received ※ 03 November 2019       paper accepted ※ 03 November 2019       issue date ※ 14 August 2019  
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TUP037 Construction of Superconducting Linac Booster for Heavy-Ion Linac at RIKEN Nishina Center 502
 
  • K. Yamada, T. Dantsuka, H. Imao, O. Kamigaito, K. Kusaka, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, T. Watanabe, Y. Watanabe
    RIKEN Nishina Center, Wako, Japan
  • H. Hara, A. Miyamoto, K. Sennyu, T. Yanagisawa
    MHI-MS, Kobe, Japan
  • E. Kako, H. Nakai, H. Sakai, K. Umemori
    KEK, Ibaraki, Japan
 
  At RIKEN Nishina Center, the RIKEN Heavy-Ion Linac (RILAC) is undergoing an upgrade of its acceleration voltage in order to allow it further investigation of new super-heavy elements. In this project, a new superconducting (SC) booster linac, so-called SRILAC, is being developed and constructed. The SRILAC consists of 10 TEM quarter-wavelength resonators made of pure niobium sheets which operate at 4 K. The target performance of each cavity is set as Q0 of 1×109 with its accelerating gradient of 6.8 MV/m. Recently we succeeded to develop high performance SC-cavities which satisfies the requirement with a wide margin. The cryomodule assembly is under way, and installation of cryomodules and He liquefaction system will be completed by the end of FY2018. The cooling-down test is scheduled in the Q1 of FY2019. This contribution makes a report on the construction status of the SRILAC.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2019-TUP037  
About • paper received ※ 02 July 2019       paper accepted ※ 04 July 2019       issue date ※ 14 August 2019  
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TUP041 SRF testing for Mainz Energy Recovering Superconducting Accelerator MESA 508
 
  • T. Stengler, K. Aulenbacher, F. Hug, S.D.W. Thomas
    KPH, Mainz, Germany
  • K. Aulenbacher
    GSI, Darmstadt, Germany
  • K. Aulenbacher
    HIM, Mainz, Germany
 
  Funding: This work is supported by the German Research Foundation (DFG) under the Cluster of Excellence "PRISMA+" EXC 2118/2019
The two superconducting radio frequency acceleration cryomodules for the new multiturn ERL ’Mainz Energy Recovering Superconducting Accelerator’ MESA at Johannes Gutenberg-Universität Mainz have been fabricated and are currently under testing at the Helmholtz Institut Mainz. These modules are based on the ELBE modules of the Helmholtz Center Dresden-Rossendorf but are modified to suit the high current and energy-recovering operation at MESA. The energy gain per module per turn should be 25 MeV, provided by two TESLA cavities, which were vertically tested at DESY, Hamburg, Germany. These tests showed an excellent performance of the quench limit and quality factor for three out of the four cavities. The fourth cavity has a lower but still acceptable quench limit and quality factor. In order to validate the performance of the fully assembled cryomodules after delivery to Mainz a test stand has been set up at the Helmholtz Institut Mainz. The test stand is described in detail and the status of the module testing is reported.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2019-TUP041  
About • paper received ※ 21 June 2019       paper accepted ※ 29 June 2019       issue date ※ 14 August 2019  
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TUP042 Measurement of Mechanical Vibration of SRILAC Cavities 513
 
  • O. Kamigaito, K. Ozeki, N. Sakamoto, K. Suda, K. Yamada
    RIKEN Nishina Center, Wako, Japan
 
  Mechanical vibration of quarter-wavelength resonators of SRILAC, the superconducting booster of the RIKEN heavy-ion linac, was measured during a vertical cold test. The measurements were performed for fully assembled cavities as well as for bare niobium cavities without the titanium jacket. In the procedure, the instantaneous resonant frequencies were measured for 10 seconds at a time interval of 1 ms and were recorded as a time series. The frequencies were analyzed by means of conventional signal analysis. The power spectrum was deduced from the autocorrelation function calculated with the fluctuation of resonant frequencies. Although the vibration amplitudes were smaller in the cavities assembled with the titanium jacket, we could not find a clear reason for this.  
poster icon Poster TUP042 [6.957 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2019-TUP042  
About • paper received ※ 27 June 2019       paper accepted ※ 30 June 2019       issue date ※ 14 August 2019  
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