PAC07 - List of Authors (Alesini, D.)

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Alesini, D.

Paper	Title	Page
MOOBKI02	DAΦ NE Phi-Factory Upgrade for Siddharta Run	66
	M. E. Biagini, D. Alesini, D. Babusci, R. Boni, M. Boscolo, F. Bossi, B. Buonomo, A. Clozza, G. O. Delle Monache, T. Demma, G. Di Pirro, A. Drago, A. Gallo, S. Guiducci, C. Ligi, F. Marcellini, G. Mazzitelli, C. Milardi, F. Murtas, L. Pellegrino, M. A. Preger, L. Quintieri, P. Raimondi, R. Ricci, U. Rotundo, C. Sanelli, G. Sensolini, M. Serio, F. Sgamma, B. Spataro, A. Stecchi, A. Stella, S. Tomassini, C. Vaccarezza, M. Zobov INFN/LNF, Frascati (Roma) S. Bettoni CERN, Geneva I. Koop, E. Levichev, P. A. Piminov, D. N. Shatilov, V. V. Smaluk BINP SB RAS, Novosibirsk K. Ohmi KEK, Ibaraki
	An upgrade of the DAΦNE Phi-Factory at LNF is foreseen in view of the installation of the Siddharta detector in 2007. A new Interaction Region suitable to test the large crossing angle and crabbed waist collision schemes* will be installed. Other machine improvements, such as wigglers modifications, new injection kickers and chambers coating will be realized with the goal of reaching luminosity of the order of 10³³/cm²/s. The principle of operation of the new scheme, together with hardware designs and simulation studies, will be presented. *DAPHNE Upgrade Team, "DAPHNE Upgrade for Siddharta run", DAPHNE Tech. Note G-68, LNF-INFN, Dec. 2006
	Slides
MOOAAB02	Experimental Results with the SPARC Emittance-meter	80
	M. Ferrario, D. Alesini, M. Bellaveglia, S. Bertolucci, R. Boni, M. Boscolo, M. Castellano, A. Clozza, L. Cultrera, G. Di Pirro, A. Drago, A. Esposito, D. Filippetto, V. Fusco, A. Gallo, G. Gatti, A. Ghigo, M. Incurvati, C. Ligi, M. Migliorati, A. Mostacci, E. Pace, L. Palumbo, L. Pellegrino, R. Ricci, C. Sanelli, M. Serio, F. Sgamma, B. Spataro, F. Tazzioli, S. Tomassini, C. Vaccarezza, M. Vescovi, C. Vicario INFN/LNF, Frascati (Roma) A. Bacci, S. Cialdi, A. R. Rossi, L. Serafini INFN-Milano, Milano L. Catani, E. Chiadroni, A. Cianchi INFN-Roma II, Roma A. M. Cook, M. P. Dunning, P. Frigola, J. B. Rosenzweig UCLA, Los Angeles, California L. Giannessi, M. Quattromini, C. Ronsivalle ENEA C. R. Frascati, Frascati (Roma) P. Musumeci, M. Petrarca INFN-Roma, Roma
	The SPARC project foresees the realization of a high brightness photo-injector to produce a 150-200 MeV electron beam to drive a SASE-FEL in the visible light. As a first stage of the commissioning a complete characterization of the photoinjector has been done with a detailed study of the emittance compensation process downstream the gun-solenoid system. For this purpose a novel beam diagnostic device, called emittance meter, has been developed and used at SPARC. This device has allowed to measure the evolution of beam sizes, energy spread and rms transverse emittances at different location along the beamline, in the region where space-charge effects dominate the electron dynamics and the emittance compensation process takes place. In this paper we report our commissioning experience and the results obtained. In particular a comparison between the performances of a Gaussian laser pulse versus a Flat Top laser pulse will be discussed. We report also the first experimental observation of the double emittance minima effect on which is based the optimised matching with the SPARC linac.
	Slides
TUPMN039	Status of the SPARC-X Project	1001
	C. Vaccarezza, D. Alesini, M. Bellaveglia, S. Bertolucci, R. Boni, M. Boscolo, M. Castellano, A. Clozza, L. Cultrera, G. Di Pirro, A. Drago, A. Esposito, M. Ferrario, L. Ficcadenti, D. Filippetto, V. Fusco, A. Gallo, G. Gatti, A. Ghigo, C. Ligi, M. Migliorati, A. Mostacci, E. Pace, L. Palumbo, L. Pellegrino, M. A. Preger, R. Ricci, C. Sanelli, M. Serio, F. Sgamma, B. Spataro, A. Stella, F. Tazzioli, M. Vescovi, C. Vicario INFN/LNF, Frascati (Roma) F. Alessandria, A. Bacci, R. Bonifacio, I. Boscolo, F. Broggi, F. Castelli, S. Cialdi, C. De Martinis, A. F. Flacco, D. Giove, C. Maroli, V. Petrillo, A. R. Rossi, L. Serafini INFN-Milano, Milano M. Bougeard, P. Breger, B. Carre, D. Garzella, M. Labat, G. Lambert, H. Merdji, P. Monchicourt, P. Salieres, O. Tcherbakoff CEA, Gif-sur-Yvette L. Catani, E. Chiadroni, A. Cianchi, E. Gabrielli, C. Schaerf INFN-Roma II, Roma F. Ciocci, G. Dattoli, A. Dipace, A. Doria, F. Flora, G. P. Gallerano, L. Giannessi, E. Giovenale, G. Messina, P. L. Ottaviani, S. Pagnutti, G. Parisi, L. Picardi, M. Quattromini, A. Renieri, G. Ronci, C. Ronsivalle, M. Rosetti, E. Sabia, M. Sassi, A. Torre, A. Zucchini ENEA C. R. Frascati, Frascati (Roma) M.-E. Couprie SOLEIL, Gif-sur-Yvette P. Emma SLAC, Menlo Park, California M. Mattioli, D. Pelliccia Universita di Roma I La Sapienza, Roma P. Musumeci, M. Petrarca INFN-Roma, Roma C. Pellegrini, S. Reiche, J. B. Rosenzweig UCLA, Los Angeles, California A. Perrone INFN-Lecce, Lecce
	SPARC-X is a two branch project consisting in the SPARC test facility dedicated to the development and test of critical subsystems such as high brightness photoinjector and a modular expandable undulator for SASE-FEL experiments at 500 nm with seeding, and the SPARX facility aiming at generation of high brightness coherent radiation in the 3-13 nm range, based on the achieved expertise. The projects are supported by MIUR (Research Department of Italian Government) and Regione Lazio. SPARC has completed the commissioning phase of the photoinjector in November 2006. The achieved experimental results are here summarized together with the status of the second phase commissioning plans. The SPARX project is based on the generation of ultrahigh peak brightness electron beams at the energy of 1 and 2 GeV generating radiation in the 3-13 nm range. The construction is at the moment planned in two steps starting with a 1 GeV Linac. The project layout including both RF-compression and magnetic chicane techniques has been studied and compared, together with the feasibility of a mixed s-band and x-band linac option.
TUPAN033	DAΦ NE Setup and Performances During the Second FINUDA Run	1457
	C. Milardi, D. Alesini, M. E. Biagini, C. Biscari, R. Boni, M. Boscolo, B. Buonomo, A. Clozza, G. O. Delle Monache, T. Demma, E. Di Pasquale, G. Di Pirro, A. Drago, A. Gallo, A. Ghigo, S. Guiducci, M. Incurvati, P. Iorio, C. Ligi, F. Marcellini, C. Marchetti, G. Mazzitelli, L. Pellegrino, M. A. Preger, L. Quintieri, P. Raimondi, R. Ricci, U. Rotundo, C. Sanelli, M. Serio, F. Sgamma, B. Spataro, A. Stecchi, A. Stella, S. Tomassini, C. Vaccarezza, M. Zobov INFN/LNF, Frascati (Roma) J. D. Fox, D. Teytelman SLAC, Menlo Park, California E. Levichev, S. A. Nikitin, P. A. Piminov, D. N. Shatilov BINP SB RAS, Novosibirsk
	Beam operations on DAΦNE restarted on October 2006 after a four months shut-down to remove the KLOE experimental detector and to install the FINUDA one. This period has been also used for maintenance and implementation of several upgrades. In the first two months of operation the peak and integrated luminosity already exceeds the values obtained during the first FINUDA run by 20%. The DAΦNE goal is to deliver 1 fb-1 integrated luminosity by the end of May 2007. The collider performances during the run are presented together with the improvements obtained in terms of ring nonlinearities and beam dynamics coming from several collider modifications.
TUPAN036	DAPHNE Upgrade: A New Magnetic and Mechanical Layout	1466
	S. Tomassini, D. Alesini, A. Beatrici, A. Clozza, E. Di Pasquale, G. Fontana, F. Marcellini, G. Mazzitelli, M. Paris, P. Raimondi, C. Sanelli, G. Sensolini, F. Sgamma, M. Troiani, M. Zobov, A. Zolla INFN/LNF, Frascati (Roma) M. E. Esposito Rome University La Sapienza, Roma
	The DAPHNE Phi-Factory upgrade, foreseen for the Siddharta detector run in 2007, will require a new magnetic and mechanical layout to exploit the "large crossing angle" and "crabbed waist" concepts. New permanent quadrupole magnets and aluminium vacuum chamber with thin window have been designed for the new interaction region, with the aim to reuse at maximum the present magnetic and vacuum chamber components. A vacuum chamber of novel design will allow separating the beams at the second interaction region. Designs and results for the new layout will be presented. DAPHNE Upgrade Team, "DAPHNE Upgrade for Siddharta run", DAPHNE Tech. Note G-68, Dec. 2006.
WEPMS035	Measurement of the UCLA/URLS/INFN Hybrid Gun	2418
	B. D. O'Shea, A. Boni, A. Fukasawa, J. B. Rosenzweig UCLA, Los Angeles, California D. Alesini, M. Ferrario, B. Spataro INFN/LNF, Frascati (Roma) L. Ficcadenti, A. Mostacci, L. Palumbo Rome University La Sapienza, Roma
	Funding: This work performed under the auspices of the U. S. Department of Energy under contract numbers DE-FG-98ER45693 and DE-FG03-92ER40693. The hybrid photoinjector is a high current, low emittance photoinjector/accelerator and is under design and collaboration at Roma University La Sapienza, INFN - Laboratori Nazionali di Frascati and the UCLA Particle Beam Physics Lab. The hybrid standing wave-traveling wave photoinjector uses a coupling cell to divide power between a high-field 1.6 cell standing wave photoinjector, for electron emission and collection, and a low power traveling wave accelerator, for acceleration to desired energies at low emittances. Simulation results show promising beam properties of less than 4 mm-mrad emittance, energy spreads of 1.5%, and currents as high as 1.2 kA at energies of 21 MeV. We report on the progress of RF design and results of cold test RF measurements at the UCLA Pegasus Laboratory, including methods for measurements and difficulties arising in the transition from simulation to physical measurements.
THPAS052	Charge and Wavelength Scaling of the UCLA/URLS/INFN Hybrid Photoinjector	3609
	A. Fukasawa, A. Boni, B. D. O'Shea, J. B. Rosenzweig UCLA, Los Angeles, California D. Alesini, M. Ferrario, B. Spataro INFN/LNF, Frascati (Roma) L. Ficcadenti, A. Mostacci, L. Palumbo Rome University La Sapienza, Roma
	Short-bunched beam is required for the improving the emission of the free electron laser and wakefield accelerations, as well as low emittance beam. To achieve both of short length and low emittance, we are developing SW/TW Hybrid gun. Two standing wave cells make a photocathode RF gun and the gun is connected directory to the input coupler of the traveling wave structure, and the total length is about 3 m. The low emittance beam produced in the RF gun is bunching in the traveling wave structure in the scheme of, so called, "velocity bunching". PARMELA simulation shows that 1 nC bunch can be achieve 3.0 mm.mrad for the normalized rms emittance and 0.14 mm for the rms bunch length, simultaneously. We also calculates the cases of 1 pC bunch in S-band and 250 pC bunch in X-band to get shorter bunch length and lower emittance. 1 pC bunch is scaled to 1/1000 in its volume (one-tenth for each dimension). It can result in 0.0047 mm short while the emittance is 0.091 mm.mrad. In X-band case, where the structures are scaled down one-fourth in the length and four times in the field strength, the bunch length and the emittance are 0.027 mm and 1.1 mm.mrad, respectively.
FRPMN023	New Beam Diagnostic Developments at the Photo-Injector Test Facility PITZ	3967
	S. Khodyachykh, G. Asova, J. W. Baehr, C. H. Boulware, H.-J. Grabosch, M. Hanel, S. A. Korepanov, M. Krasilnikov, S. Lederer, A. Oppelt, B. Petrosyan, S. Rimjaem, J. Roensch, T. A. Scholz, L. Staykov, F. Stephan DESY Zeuthen, Zeuthen D. Alesini, L. Ficcadenti INFN/LNF, Frascati (Roma) T. Garvey LAL, Orsay L. H. Hakobyan YerPhI, Yerevan D. J. Holder, B. D. Muratori STFC/DL/ASTeC, Daresbury, Warrington, Cheshire R. Richter BESSY GmbH, Berlin R. Spesyvtsev KhNU, Kharkov
	Funding: This work has partly been supported by the European Community, contracts RII3-CT-2004-506008 and 011935, and by the "Impuls- und Vernetzungsfonds" of the Helmholtz Association, contract VH-FZ-005. The Photo-Injector Test Facility at DESY in Zeuthen (PITZ) is an electron accelerator which was built to develop and optimize high brightness electron sources suitable for SASE FEL operation. Currently, in parallel to the operation of the existing setup, a large extension of the facility and its research program is ongoing. The beam line which has a present length of about 13 meters will be extended up to about 21 meters within the next two years. Many additional diagnostics components will be added to the present layout. Two high-energy dispersive arms, an RF deflecting cavity and a phase space tomography module will extend the existing diagnostic system of the photo injector and will contribute to the full characterization of new electron sources. We will report on the latest developments of the beam diagnostics at PITZ.
FRPMN030	RF measurements results of the final brazed SPARC RF Deflector	3994
	L. Ficcadenti, A. Mostacci, L. Palumbo Rome University La Sapienza, Roma D. Alesini, G. Di Pirro, C. Vaccarezza INFN/LNF, Frascati (Roma) J. B. Rosenzweig UCLA, Los Angeles, California
	The longitudinal phase space and the horizontal beam slice emittance measurements of the SPARC 150MeV-1nC electron beam, foresee the use of a RF deflector. The device is a five cells standing wave structure operating on the TM110-like dipole mode at 2.856GHz and allows reaching a longitudinal resolution of 12μm with 2MW of peak input power. In the paper we illustrate the RF measurements on the final copper device. This work has been partially supported by the EU in the sixth framework program, Contract no. 011935 EUROFEL-DS1.
FRPMS060	Commissioning of the UCLA Neptune X-Band Deflecting Cavity and Applications to Current Profile Measurement of Ramped Electron Bunches	4135
	R. J. England, B. D. O'Shea, J. B. Rosenzweig, G. Travish UCLA, Los Angeles, California D. Alesini INFN/LNF, Frascati (Roma)
	Funding: Department of Energy Grant # DE-FG02-92ER40693 A 9-cell standing wave deflecting cavity has recently been constructed and installed at the UCLA Neptune Laboratory for use as a temporal diagnostic for the 13 MeV, 300 to 700 pC electron bunches generated by the Neptune photoinjector beamline. The cavity is a center-fed Glid-Cop structure operating in at TM110-like deflecting mode at 9.59616 GHz with a pi phase advance per cell. At the maximum deflecting voltage of 500 kV, the theoretical resolution limit of the device is 50 fs, although with current beam parameters and a spot size of 460 microns RMS the effective resolution is approximately 400 fs. We discuss the operation and testing of the cavity as well as its intended application: measuring the temporal current profile of ramped electron bunches generated using the Neptune dogleg compressor, and we present the first measurements of the electron beam current profile obtained using the deflecting cavity.