Author: Guiducci, S.
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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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THPOR007 Optics Measurements and Corrections at the Early Commissioning of SuperKEKB 3782
  • Y. Ohnishi, Y. Funakoshi, H. Koiso, A. Morita, K. Ohmi, K. Oide, H. Sugimoto, D. Zhou
    KEK, Ibaraki, Japan
  • M.E. Biagini, M. Boscolo, S. Guiducci
    INFN/LNF, Frascati (Roma), Italy
  • N. Carmignani, S.M. Liuzzo
    ESRF, Grenoble, France
  We present experimental results of measurements and corrections of the optics at the early Phase-1 commissioning of SuperKEKB which is a positron-electron collider built to achieve the target luminosity of 8x1035 cm-2s-1. We have three stages; the Phase-1 is the commissioning of the machine without the final focus magnets and detector solenoid(no collision); the collision with the final focus system and the Belle II detector will be performed at the Phase-2 and Phase-3. The strategy for the luminosity upgrade is a novel "nano-beam'' scheme found elsewhere*. In order to achieve the target luminosity, the vertical emittance has to be reduced by corrections of machine error measured by orbit responses. The vertical emittance should be achieved to be less than 6 pm(0.2 % coupling) during the Phase-1 by fully utilizing correction tools of skew quadrupole-like coils wound on sextupole magnets and power supplies for each correction coil in quadrupole magnets. In addition to the linear optics, the optics for off-momentum particles is also studied to understand a dynamic aperture affects the Touschek lifetime.
* "SuperB Conceptual Design Report", INFN/AE-07/2, SLAV-R-856, LAL 07-15, (2007).
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR007  
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