Author: Pioli, S.
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MOPMR017 Design and Simulations of the Cavity BPM Readout Electronics for the ELI-NP Gamma Beam System 264
  • M. Cargnelutti, B.B. Baricevic
    I-Tech, Solkan, Slovenia
  • A. Mostacci
    University of Rome La Sapienza, Rome, Italy
  • S. Pioli, M. Serio, A. Stella, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  The Extreme Light Infrastructure - Nuclear Physics (ELI-NP) facility will provide a high intensity laser and a very intense gamma beam which will be used in a broad range of experiments. The gamma beam is obtained through incoherent Compton back-scattering of a laser light off a high brightness electron beam provided by a 700MeV warm LINAC. Electrons are accelerated in trains with up to 32 bunches, each one separated by 16ns. In the laser-electron interaction region, every bunch needs to be monitored with a resolution below 1μm RMS. To achieve this performance, a low-Q cavity beam position monitor will be used in combination with a dedicated data acquisition system able to perform bunch-by-bunch beam position measurements with sub-μm resolution. Using fast A/D converters and specific digital filtering, the readout system proposes an alternative measurement concept. The requirements of the system, its design and the results from the simulations will be presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR017  
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MOPMW004 Realization and High Power Tests of Damped C-Band Accelerating Structures for the ELI-NP Linac 399
  • D. Alesini, M. Bellaveglia, S. Bini, R. Boni, P. Chimenti, F. Cioeta, R.D. Di Raddo, A. Falone, A. Gallo, V.L. Lollo, L. Palumbo, S. Pioli, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • F. Cardelli, M. Magi, A. Mostacci, L. Palumbo, L. Piersanti
    University of Rome La Sapienza, Rome, Italy
  • F. Cardelli, L. Piersanti
    INFN-Roma1, Rome, Italy
  • P. Favaron, F. Poletto
    INFN/LNL, Legnaro (PD), Italy
  • L. Ficcadenti, F. Pellegrino, V. Pettinacci
    INFN-Roma, Roma, Italy
  The ELI-NP C-Band structures are 1.8 m long travelling wave accelerating structures, quasi-constant gradient, with a field phase advance per cell of 2pi/3. They operate at a repetition rate of 100 Hz and, because of the multi-bunch operation, they have been designed with a dipole HOM damping system to avoid beam break-up (BBU). The structures have symmetric input and output couplers and integrate, in each cell, a waveguide HOM damping systems with silicon carbide RF absorbers. An optimization of the electromagnetic and mechanical design has been done to simplify the fabrication and to reduce their cost. After the first full scale prototype successfully tested at the nominal gradient of 33 MV/m, the production of the twelve structures started. In the paper we illustrate the main design criteria, the realization process and the high power test results.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMW004  
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TUPMY041 Delivery Status of the ELI-NP Gamma Beam System 1635
  • S. Tomassini, D. Alesini, A. Battisti, R. Boni, F. Cioeta, A. Delle Piane, E. Di Pasquale, G. Di Pirro, A. Falone, A. Gallo, S.I. Incremona, V.L. Lollo, A. Mostacci, S. Pioli, R. Ricci, U. Rotundo, A. Stella, C. Vaccarezza, A. Vannozzi, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • A. Bacci, D.T. Palmer, L. Serafini
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • N. Bliss
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
  • F. Cardelli
    INFN-Roma1, Rome, Italy
  • K. Cassou, Z.F. Zomer
    LAL, Orsay, France
  • G. D'Auria
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • A. Giribono, V. Pettinacci
    INFN-Roma, Roma, Italy
  • C. Hill
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • L. Palumbo
    Rome University La Sapienza, Roma, Italy
  • L. Piersanti
    University of Rome La Sapienza, Rome, Italy
  The ELI-NP GBS is a high intensity and monochromatic gamma source under construction in Magurele (Romania). The design and construction of the Gamma Beam System complex as well as the integration of the technical plants and the commissioning of the overall facility, was awarded to the Eurogammas Consortium in March 2014. The delivery of the facility has been planned in for 4 stages and the first one was fulfilled in October 31st 2015. The engineering aspects related to the delivery stage 1 are presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY041  
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THPOY003 The Turn-key Control System for the ELI-NP Gamma Beam System 4091
  • S. Pioli, G. Di Pirro
    INFN/LNF, Frascati (Roma), Italy
  • F. Amand, V.A. Isaev, A. Jesenko, A. Manojlovic, R. Modic, I. Mustac, G. Pajor
    Cosylab, Ljubljana, Slovenia
  • B.G. Martlew, A. Oates
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
  The new Gamma Beam System (GBS) under construction in Magurele (RO) by the consortium EuroGammas led by INFN, as part of the ELI-NP project, can provide gamma rays that open new possibilities for nuclear photonics and nuclear physics. In the ELI-GBS, gamma rays are produced by means of Compton back-scattering to get mono-chromaticity (0,1% bandwidth), a high flux (1013 photon/s the highest in the world), tunable directions and energies up to 19 MeV. Such gamma beam characteristic is obtained when a high-intensity laser collides a high-brightness electron-beam with energies up to 720 MeV. In order to increase the gamma beam flux, the electron beam operates at a repetition rate of 100 Hz in a multi-bunch mode: trains of 32 bunches, 16 ns apart, interact with the laser pulse recirculated 32 times through the interaction point. The EPICS Control System collects data from all sub-systems, constantly monitoring to ensure the safety of the ELI-GBS facility. This paper describes all the aspects of the ELI-GBS turn-key Control System, such as hardware integration, micro-bunches diagnostics, high level applications, the data network and the pico-second timing system.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY003  
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