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G. Vignola

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Last Name: Vignola

Full Name: G. Vignola

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8 papers
title: Feasibility study of a storage ring for a high-power XUV free-electron laser
format: journal article
year: 1986
12 authors: J. Bisognano | S. Chattopadhyay | M. Cornacchia | A. Garren | K. Halbach | A. Jackson | K. J. Kim | H. Lancaster | J. Peterson | M. Zisman | C. Pellegrini | G. Vignola
abstract: A high-gain free-electron lase (FEL), operating in a special by-pass of a storage ring, can provide tens of megawatts of coherent power at wavelengths shorter than 1000 AA. The requirements on beam quality are demanding-a few hundred amperes of peak current in an emittance of about 10/sup -8/ m-rad with a relative energy spread of about 10/sup -3/. Designing an electron storage ring with the required characteristics involves a comprehensive analysis of the restrictions arising from, and relationships between, the FEL physics, the multiparticle beam phenomena, and the ring lattice structure. A summary of such a study is reported and some design examples are given. (39 References).
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title: Optimization of the parameters of a storage ring for a high power XUV free electron laser
format: conference procceeding
conference: International Conference on Insertion Devices for Synchrotron Sources
year: 1986
12 authors: A. Jackson | J. Bisognano | S. Chattopadhyay | M. Cornacchia | A. Garren | K. Halbach | Kim, K. J. | H. Lancaster | J. Peterson | M. S. Zisman | C. Pellegrini | G. Vignola
abstract: The authors describe the operation of an XUV high gain FEL operating within a bypass of an electron storage ring, and discuss the implications on storage ring optimization imposed be FEL requirements. It transpires that, in the parameter regime of interest, collective effects within the beam play an important role. For example, intrabeam scattering dilutes the transverse emittance of the beam and the microwave instability increases the momentum spread. Both phenomena reduce the effectiveness of the FEL. A computer code, ZAP, has been written which, for a given lattice design, takes all such effects into consideration and produces a figure of merit for FEL operation for that machine. They show the results of ZAP for several storage ring designs, all optimized for FEL operation, and present a design example of a facility capable of producing coherent radiation at 400 AA with tens of megawatts of peak power. (24 References).
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title: Design concepts of a storage ring for a high power XUV free electron laser
format: conference procceeding
conference: 7th International Free Electron Laser Conference
year: 1986
12 authors: M. Cornacchia | J. Bisognano | S. Chattopadhyay | A. Garren | K. Halbach | A. Jackson | K. J. Kim | H. Lancaster | J. Peterson | M. S. Zisman | C. Pellegrini | G. Vignola
abstract: The authors report on the study of a storage ring capable of sustaining an electron beam of the quality required for a high-gain free electron laser in the vacuum ultraviolet and X-ray region. They describe a method for the optimization of the design of the storage ring where several competing and often conflicting requirements come into play. They present an example design of a ring that satisfies the required conditions of beam quality and is able to produce coherent radiation at 400 AA with tens of megawatts of peak power. (11 References).
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title: A study for a 6 GeV undulator based synchrotron radiation source
format: conference procceeding
conference: 1985 Particle Accelerator Conference
year: 1985
9 authors: G. Vignola | Barton, M. | Blumberg, R. | Galayda, J. | Krinsky, S. | Luccio, A. | C. Pellegrini | van Steenbergen, A. | Wang, J.
abstract: A partial study for a 6 GeV undulator based synchrotron radiation source for production of high brightness undulator radiation, in the angstrom region, is presented. The basic lattice adopted for the storage ring is a hybrid FODO Chasman-Green lattice, making use of gradient in the dipoles. The e beam current limits and the injection parameters are discussed. (8 References).
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title: Storage ring design for a short wavelength FEL
format: conference procceeding
conference: 1985 Particle Accelerator Conference
year: 1985
12 authors: K. J. Kim | J. Bisognano | S. Chattopadhyay | M. Cornacchia | A. Garren | K. Halbach | A. Jackson | H. Lancaster | J. Peterson | M. Zisman | C. Pellegrini | G. Vignola
abstract: A high gain free electron laser (FEL) operating in a special bypass of a storage ring can provide tens of megawatts of coherent power at wavelengths shorter than 1000 AA. The requirements on beam qualities are demanding, a few hundred amperes of peak current in an emittance of about 10/sup -8/ m-rad with a relative energy spread of approximately 10/sup -3/. Designing an electron storage ring with the required characteristics involves a comprehensive analysis of the restrictions from, and relationships between, the FEL physics, the multiparticle beam phenomena, and the ring lattice structure. A summary of such a study is reported and some design examples are given. (12 References).
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title: A new method for pumping an optical klystron
format: conference procceeding
conference: International Workshop on Coherent and Collective Properties in the Interaction of Relativistic Electrons and Electromagnetic Radiation
year: 1985
8 authors: G. Vignola | Freeman, R. R. | Kincaid, B. M. | C. Pellegrini | Luccio, A. | J. Murphy | Galayda, J. | van Steenbergen, A.
abstract: A novel method of operation for a transverse optical klystron (TOK) is proposed. The TOK is a device in which a relativistic electron beam produces tunable coherent radiation at short wavelengths by interacting with a powerful external laser and an undulator field. The authors show that, by selecting the external laser wavelength to be one of the harmonics in the undulator radiation spectrum, excellent output at short wavelengths can be realized with significantly reduced performance requirements for the undulator magnet and the storage ring providing the electron beam. (10 References).
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title: Remarks on two beam behaviour of the 1.5 GeV electron positron storage ring ADONE
format: conference procceeding
conference: 8th International Conference on High Energy Accelerators
year: 1971
13 authors: Amman, F. | Bassetti, M. | Cattoni, A. | Chimenti, V. | Fabiani, D. | Matera, M. | C. Pellegrini | Placidi, M. | M. Preger | A. Renieri | S. Tazzari | F. Tazzioli | G. Vignola
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title: Two-beam operation of the 1.5 GeV electron-positron storage ring Adone
format: unknown
year: 1969
17 authors: Amman, F. | Andreani, R. | Bassetti, M. | Bernardini, M. | Cattoni, A. | Chimenti, V. | Corazza, G. F. | Fabiani, D. | Felenghi, E. | Massarotti, A. | C. Pellegrini | Placidi, M. | Puglisi, M. | Soso, F. | S. Tazzari | F. Tazzioli | G. Vignola
abstract: Two-beam operation has recently been successfully achieved at Adone, the 1.5 GeV electron-positron storage ring of the Laboratori Nazionali di Frascati del CNEN the first results, which are in good agreement with the design aim, are reported. Measurements of the luminosity (defined as the interaction rate in a crossing region for an event having unit cross-section) have been performed observing the interaction rate of events with known cross-section (e+ e- single bremsstrahlung and e+ e- scattering at small angles). The luminosity has also been computed from beam currents and transverse dimensions.
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