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MOPAB057 |
Analysis and Correction of Geometrical Non-Linearities of ELI-NP BPMs on Position and Current Measurements |
235 |
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- G. Franzini, F. Cioeta, O. Coiro, V.L. Lollo, D. Pellegrini, S. Pioli, A. Stella, A. Variola
INFN/LNF, Frascati (Roma), Italy
- M. Marongiu
INFN-Roma, Roma, Italy
- A. Mostacci
University of Rome La Sapienza, Rome, Italy
- A.A. Nosych
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
- L. Sabato
U. Sannio, Benevento, Italy
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The advanced source of Gamma-ray photons will be soon built near Bucharest (Romania) by an European consortium (EurogammaS) led by INFN, as part of the ELI-NP (Extreme Light Infrastructure-Nuclear Physics). It will generate photons by Compton back-scattering in the collision between a multi-bunch electron beam, at a maximum energy of 720 MeV, and a high intensity recirculated laser pulse. An S-Band photo-injector and the following C-band Linac, which are under construction, will operate at 100Hz repetition rate with macro pulses of 32 electron bunches, separated by 16ns and with 250pC nominal charge. Stripline and cavity BPMs will be installed along the linac, in order to measure both the position and charge of the electron beam. Stripline BPM response can be considered linear within a limited area around the BPM origin. In order to use the full BPM acceptance area, without accuracy losses due to non-linearities, we plan to use correction algorithms, developed on the basis of simulations and measurements of BPMs response. In particular, suitable high-order surface polynomials will be used.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB057
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MOPAB058 |
Optical Issues for the Diagnostic Stations for the ELI-NP Compton Gamma Source |
238 |
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- M. Marongiu, D. Cortis
INFN-Roma, Roma, Italy
- E. Chiadroni, F. Cioeta, G. Di Pirro, G. Franzini, V. Shpakov, A. Stella, A. Variola
INFN/LNF, Frascati (Roma), Italy
- A. Cianchi
Università di Roma II Tor Vergata, Roma, Italy
- A. Mostacci, L. Palumbo
University of Rome La Sapienza, Rome, Italy
- L. Sabato
U. Sannio, Benevento, Italy
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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 bunches, 16 ns spaced, 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 (OTR) profile monitors. In order to measure the beam properties, the optical radiation detecting system must have the necessary accuracy and resolution. This paper deals with the studies of different optic configurations to achieve the magnification, resolution and accuracy in order to measure very small beam (below 30 um) or to study the angular distribution of the OTR and therefore the energy of the beam. Several configurations of the optical detection line will be studied both with simulation tools (e.g. Zemax) and experimentally. The paper will deal also with the sensibility of optic system (in terms of depth of field, magnification and resolution) to systematic errors.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB058
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MOPAB064 |
Photoinjector Emittance Measurement at STAR |
257 |
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- A. Bacci, C. Curatolo, I. Drebot, L. Serafini, V. Torri
Istituto Nazionale di Fisica Nucleare, Milano, Italy
- R.G. Agostino, R. Barberi, V. Formoso, M. Ghedini, F. Martire, C. Pace
UNICAL, Arcavacata di Rende, Italy
- D. Alesini, M. Bellaveglia, J.J. Beltrano, F.G. Bisesto, G. Borgese, B. Buonomo, G. Di Pirro, G. Di Raddo, A. Esposito, A. Gallo, A. Ghigo, F. Iungo, A. Papa, L. Pellegrino, A. Stella, C. Vaccarezza, S. Vescovi
INFN/LNF, Frascati (Roma), Italy
- A. Cianchi
Università di Roma II Tor Vergata, Roma, Italy
- G. D'Auria, A. Fabris, M. Marazzi
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
- V. Petrillo
Universita' degli Studi di Milano, Milano, Italy
- A. Policicchio
UniCal & INFN CS, Arcavacata di Rende (CS), Italy
- E. Puppin
Politecnico/Milano, Milano, Italy
- M. Rossetti Conti
Universita' degli Studi di Milano & INFN, Milano, Italy
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STAR is an advanced Thomson source of monochromatic and tunable, ps-long, polarised X-ray beams in the 40-140 keV range. The commissioning has started at the Univ. of Calabria (Italy). The light source is driven by a high-brightness, low-emittance electron beam produced in a LINAC allowing for the source tunability and spectral density. This note reports on an emittance measurement schema based on the insertion of a slit mask in the vacuum chamber dedicated to the photocathode laser entrance. Results of the simulation of the measurement technique are reported, and the use of the data for the optimisation of the accelerator performance are detailed. The experimental setup and the application developed in EPICS for image recording and analysis are also described.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB064
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MOPVA016 |
ELI-NP GBS Status |
880 |
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- A. Giribono, M. Marongiu, A. Mostacci, V. Pettinacci
INFN-Roma, Roma, Italy
- S. Albergo
INFN-CT, Catania, Italy
- D. Alesini, M. Bellaveglia, B. Buonomo, F. Cioeta, E. Di Pasquale, G. Di Pirro, A. Esposito, A. Falone, G. Franzini, O. Frasciello, A. Gallo, S. Guiducci, S. Incremona, F. Iungo, V.L. Lollo, L. Pellegrino, L. Piersanti, S. Pioli, R. Ricci, U. Rotundo, L. Sabbatini, A. Stella, S. Tomassini, C. Vaccarezza, A. Variola
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
- N. Bliss, C. Hill
STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
- G. Campogiani
Rome University La Sapienza, Roma, Italy
- P. Cardarelli, M. Gambaccini
INFN-Ferrara, Ferrara, Italy
- F. Cardelli, A. Mostacci, L. Palumbo, A. Vannozzi
University of Rome La Sapienza, Rome, Italy
- F. Cardelli, L. Palumbo
INFN-Roma1, Rome, Italy
- K. Cassou, K. Dupraz, A. Martens, C.F. Ndiaye, Z.F. Zomer
LAL, Orsay, France
- G. D'Auria
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
- L. Sabato
U. Sannio, Benevento, Italy
- M. Veltri
INFN-FI, Sesto Fiorentino, Italy
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New generation of Compton sources are developing in different countries to take advantage of the photon energy amplification given by the Compton backscattering effect. In this framework the Eurogammas international collaboration is producing a very high brilliance gamma source for the Nuclear Pillar of the Exterme Light Infrastructure program (ELI). At present there is a lot of effort in the mass production of all the components and in the developments and tests of the different high technology devices that will operate in the gammas beam source, like the optical recirculator and the high gradient - high average current warm C band accelerating sections. In this paper we will provide a general overview of the GBS status and of the perspectives for the future integration phase.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA016
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