Paper |
Title |
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MOPAB060 |
Thermal Issues for the Optical Transition Radiation Screen for the ELI-NP Compton Gamma Source |
246 |
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- F. Cioeta, D. Alesini, A. Falone, V.L. Lollo, L. Pellegrino, A. Variola
INFN/LNF, Frascati (Roma), Italy
- M. Ciambrella
University of Rome La Sapienza, Rome, Italy
- D. Cortis, M. Marongiu, V. Pettinacci
INFN-Roma, Roma, Italy
- A. Mostacci, L. Palumbo
Rome University La Sapienza, Roma, 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 two interaction points. Electron beam spot size is measured with optical transition radiation (OTR) profile monitors. In order to measure the beam properties, the OTR screens must sustain the thermal and mechanical stress due to the energy deposited by the bunches. This paper is an ANSYS study of the issues due to the high energy transferred to the OTR screens. Thermal multicycle analysis will be shown; each analysis will be followed by a structural analysis in order to investigate the performance of the material. The multiphysics analysis will be extended to the mechanical contact areas with the target frame in order to evaluate the order of magnitude of the phenomena in those regions.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB060
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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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THOBB1 |
High Power Test Results of the Eli-NP S-Band Gun Fabricated with the New Clamping Technology Without Brazing |
3662 |
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- D. Alesini, A. Battisti, M. Bellaveglia, A. Falone, A. Gallo, V.L. Lollo, L. Pellegrino, S. Pioli, S. Tomassini, A. Variola
INFN/LNF, Frascati (Roma), Italy
- F. Cardelli, L. Palumbo
University of Rome La Sapienza, Rome, Italy
- L. Ficcadenti, V. Pettinacci
INFN-Roma, Roma, Italy
- D.T. Palmer
Istituto Nazionale di Fisica Nucleare, Milano, Italy
- L. Piersanti
INFN-Roma1, Rome, Italy
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High gradient RF photoguns have been a key development to enable several applications of high quality electron beams. They allow the generation of beams with very high peak current and low transverse emittance, satisfying the tight demands for free-electron lasers, energy recovery Linacs, Compton/Thomson Sources and high-energy linear colliders. A new fabrication technique for this type of structures has been recently developed and implemented at the Laboratories of the National Institute of Nuclear physics in Frascati (LNF-INFN, Italy). It is based on the use of special RF-vacuum gaskets that allow avoiding brazing in the realization process. The S-band gun of the Compton-based ELI-NP gamma beam system (GBS) has been fabricated with this new technique. It operates at 100 Hz with 120 MV/m cathode peak field and long RF pulses to allow the 32 bunch generation foreseen for the GBS. High gradient tests have been performed at full power full repetition rate and have shown the extremely good performances of the structure in term of breakdown rates. In the paper we report and discuss all experimental results with details of the electromagnetic design and mechanical realization processes.
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Slides THOBB1 [6.211 MB]
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-THOBB1
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