Author: Giribono, A.
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MOPMB017 Design Issues for the Optical Transition Radiation Screens for theELI-NP Compton Gamma Source 118
 
  • M. Marongiu, A. Giribono, A. Mostacci, V. Pettinacci
    INFN-Roma, Roma, Italy
  • D. Alesini, E. Chiadroni, F. Cioeta, G. Di Pirro, V.L. Lollo, L. Pellegrino, V. Shpakov, A. Stella, C. Vaccarezza, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • A. Cianchi
    INFN-Roma II, Roma, Italy
  • L. Palumbo
    University of Rome La Sapienza, Rome, Italy
 
  A high brightness electron LINAC is being built in the Compton Gamma Source at the ELI Nuclear Physics facility in Romania. To achieve the design luminosity, a train of 32, 16 ns spaced, bunches with a nominal charge of 250 pC will collide with the laser beam in the interaction point. Electron beam spot size is measured with optical transition radiation profile monitors. In order to measure the beam properties along the train, the screens must sustain the thermal stress due to the energy deposited by the bunches; moreover the optical radiation detecting system must have the necessary accuracy and resolution. This paper deals with the analytical studies as well as numerical simulations to investigate the thermal behaviour of the screens impinged by the nominal bunch; the design and the performance of the optical detection line is discussed as well.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB017  
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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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WEPMY007 Plasma Density Profile Characterization for Resonant Plasma Wakefield Acceleration Experiment at SPARC_LAB 2554
 
  • F. Filippi
    INFN-Roma1, Rome, Italy
  • M.P. Anania, A. Biagioni, E. Chiadroni, M. Ferrario
    INFN/LNF, Frascati (Roma), Italy
  • A. Cianchi
    INFN-Roma II, Roma, Italy
  • F. Filippi, A. Giribono, A. Mostacci, L. Palumbo
    University of Rome La Sapienza, Rome, Italy
  • F. Filippi, A. Giribono, A. Mostacci, L. Palumbo
    INFN-Roma, Roma, Italy
  • A. Giribono
    University of Rome "La Sapienza", Rome, Italy
  • A. Zigler
    The Hebrew University of Jerusalem, The Racah Institute of Physics, Jerusalem, Israel
 
  New generation of particle accelerators is based on the excitation of large amplitude plasma waves driven by either electron or laser beams, named as Plasma Wakefield Accelerator (PWFA) and Laser Wakefield Accelerator (LWFA), respectively. Future experiments scheduled at the SPARC_LAB test facility aim to demonstrate the acceleration of externally injected high brightness electron beams through both schemes. In particular, in the so-called resonant PWFA a train of more than two driver electron bunches generated with the laser comb technique resonantly excites wakefields into the plasma, the last bunch (witness) is injected at the proper accelerating phase gaining energy from the wake. The quality of the accelerated beam depends strongly on plasma density and its distribution along the acceleration length. The desired density can be achieved with a correct shaping of the capillary in which plasma is formed. The measurements of plasma density, as well as other plasma characteristics, can be performed with spectroscopic measurements of the plasma self emitted light. The measurement of density distribution for hydrogen filled capillaries is here reported.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMY007  
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TUPOW042 Expected Gamma Spectra at ELI-NP-GBS 1854
 
  • I. Drebot, C. Curatolo
    Universita' degli Studi di Milano e INFN, Milano, Italy
  • A. Bacci, A.R. Rossi, L. Serafini
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • A. Giribono
    University of Rome "La Sapienza", Rome, Italy
  • V. Petrillo
    Universita' degli Studi di Milano & INFN, Milano, Italy
  • C. Vaccarezza, A. Variola
    INFN/LNF, Frascati (Roma), Italy
 
  The ELI-NP-GBS is an advanced source of up to 20 MeV Gamma Rays based on Compton back-scattering. We present the investigation of the production of the ELI-NP gamma photon beam generated by Compton back-scattering between the electron bunch accelerated in the linac and the laser pulse. At the interaction point (IP), the Compton backscattering properties, as spectral flux, brilliance and polarization are evaluated by the Klein-Nishina cross section. The gamma beam produced has energy ranging from 0.2 to 19.5 MeV and bandwidth of 0.5%. In order to define the optimal layout and evaluate the performances of the collimation and detection systems, a detailed Monte Carlo simulation activity has been carried out taking into account possible jitters and errors.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW042  
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MOPMB018 Metrological Characterization of the Bunch Length Measurement by Means of a RF Deflector at the ELI-NP Compton Gamma source 122
 
  • L. Sabato
    U. Sannio, Benevento, Italy
  • D. Alesini, C. Vaccarezza, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • P. Arpaia
    CERN, Geneva, Switzerland
  • P. Arpaia, A. Liccardo
    Naples University Federico II, Science and Technology Pole, Napoli, Italy
  • A. Giribono
    University of Rome La Sapienza, Rome, Italy
  • A. Mostacci, L. Palumbo
    Rome University La Sapienza, Roma, Italy
  • L. Sabato
    INFN-Napoli, Napoli, Italy
 
  Bunch length measurement in linac can be carried out using a RF deflector, which provides a transverse kick to the beam. The transverse beam size on a screen, placed after the RF deflector, represents the bunch length. In this paper, the metrological characterization of the bunch length measurement technique is proposed. The uncertainty and the systematic errors are estimated by means of a sensitivity analysis to the measurement parameters. The proposed approach has been validated through simulation by means of ELEGANT code on the parameters interesting for the electron linac of the Compton source at the Extreme Light Infrastructure - Nuclear Physics (ELI-NP).  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB018  
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MOPMB019 Quadrupole Scan Emittance Measurements for the ELI-NP Compton Gamma Source 126
 
  • A.R. Rossi, A. Bacci, L. Serafini
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • E. Chiadroni, C. Vaccarezza, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • C. Curatolo, I. Drebot
    Universita' degli Studi di Milano e INFN, Milano, Italy
  • A. Giribono, A. Mostacci
    University of Rome La Sapienza, Rome, Italy
  • V. Petrillo, M. Rossetti Conti
    Universita' degli Studi di Milano & INFN, Milano, Italy
 
  The high brightness electron LINAC of the Compton Gamma Source at the ELI Nuclear Physics facility in Romania is accelerating a train of 32 bunches with a nominal charge of 250 pC and nominal spacing of 16 ns. To achieve the design gamma flux, all the bunches along the train must have the designed Twiss parameters. Beam sizes are measured with optical transition radiation monitors, allowing a quadrupole scan for Twiss parameters measurements. Since focusing the whole bunch train on the screen may lead to permanent screen damage, we investigated non-conventional scans such as scans around a maximum of the beam size or scans with a controlled minimum spot size. This paper discusses the implementation issues of such a technique in the actual machine layout.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB019  
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TUPOW041 Optimization Studies for the Beam Dynamic in the RF Linac of the ELI-NP Gamma Beam System 1850
 
  • C. Vaccarezza, D. Alesini, M. Bellaveglia, M.E. Biagini, G. Di Pirro, A. Gallo, A. Ghigo, S. Guiducci, A. Vannozzi, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • A. Bacci, I. Drebot, D.T. Palmer, A.R. Rossi, L. Serafini
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • G. Campogiani
    Rome University La Sapienza, Roma, Italy
  • A. Giribono, A. Mostacci, L. Palumbo
    University of Rome La Sapienza, Rome, Italy
  • V. Petrillo
    Universita' degli Studi di Milano & INFN, Milano, Italy
  • L. Sabbatini
    Consorzio Laboratorio Nicola Cabibbo, Frascati, Italy
 
  The ELI-NP GBS is an high spectral density and monochromatic gamma ray source based upon the inverse Compton scattering effect now under construction in Magurele.  Its relevant specifications are brilliance higher than 1021, 0.5% monochromaticity and a 0.2-19.5 MeV energy tunability. Strong requirements are set for the electron beam dynamic: the control of both the transverse normalized emittance and the energy spread to optimize the spectral density and guarantee the mono chromaticity of the emitted radiation. On this basis the RF Linac optimization has been performed for the designed energy range; a sensitivity analysis of the machine to possible jitters, errors and so on has been also performed, the simulations results hare here presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW041  
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TUPOW043 Electron Beam Dynamics Studies for ELI-NP GBS Linac 1857
SUPSS017   use link to see paper's listing under its alternate paper code  
 
  • A. Giribono, F. Cardelli, L. Palumbo, L. Piersanti
    University of Rome La Sapienza, Rome, Italy
  • D. Alesini, A. Gallo, C. Vaccarezza, A. Vannozzi
    INFN/LNF, Frascati (Roma), Italy
  • A. Bacci, C. Curatolo, I. Drebot, V. Petrillo, A.R. Rossi, L. Serafini
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • G. Campogiani
    Rome University La Sapienza, Roma, Italy
  • F. Cardelli, L. Piersanti
    INFN-Roma1, Rome, Italy
  • L. Palumbo
    INFN-Roma, Roma, Italy
 
  The ELI-NP Gamma Beam System is an advanced gamma ray source based on the Compton back-scattering effect with unprecedented specifications of brilliance ( >1021), monochromaticity (0.5%) and energy tunability (0.2 - 19.5 MeV), presently under construction in Magurele-Bucharest (RO). Here the head-on collision is foreseen between an intense high power laser beam and a high brightness high quality electron beam with a maximum kinetic energy of 740 MeV. The electron beam dynamics analysis and control for the ELI-NP GBS Linac in the single and multi bunch mode have been investigated and are here illustrated.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW043  
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