Scientific Results

Development of a Multi-GeV spectrometer for laser-plasma experiment at FLAME

Year: 2011

Authors: Valente P., Anelli F., Bacci A., Batani D., Bellaveglia M., Benocci R., Benedetti C., Cacciotti L., Cecchetti C.A., Clozza A., Cultrera L., Di Pirro G., Drenska N., Faccini R., Ferrario M., Filippetto D., Fioravanti S., Gallo S., Gamucci A., Gatti G., Ghigo A., Giulietti A., Giulietti D., Gizzi LA, Koester P., Labate L., Levato T., Lollo V., Londrillo P., Martellotti S., Pace E., Pathak N., Rossi A., Tani F., Serafini L., Turchetti L., Vaccarezza C.

Autors Affiliation: Sez INFN Roma, Rome, Italy; Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy; Univ Milan, Sez INFN, I-20122 Milan, Italy; Univ Milan, Dip Fisica, I-20122 Milan, Italy; Univ Milano Bicocca, Sez INFN, Milan, Italy; Univ Milano Bicocca, Dip Fis, Milan, Italy; Univ Bologna, Dip Fis, I-40126 Bologna, Italy; Sez INFN Bologna, Bologna, Italy; INO CNR, ILIL, Pisa, Italy; Sezione Ist Nazl Fis Nucl, Pisa, Italy; Univ Roma La Sapienza, Dip Fis, Rome, Italy; Univ Pisa, Dip Fis, I-56100 Pisa, Italy; Univ Bologna, Dip Astron, I-40126 Bologna, Italy; INAF Sez Bologna, Bologna, Italy

Abstract: The advance in laser-plasma acceleration techniques pushes the regime of the resulting accelerated particles to higher energies and intensities. In particular, the upcoming experiments with the 250 TW laser at the FLAME facility of the INFN Laboratori Nazionali di Frascati, will enter the GeV regime with more than 100 pC of electrons. At the current status of understanding of the acceleration mechanism, relatively large angular and energy spreads are expected. There is therefore the need for developing a device capable to measure the energy of electrons over three orders of magnitude (few MeV to few GeV), with still unknown angular divergences. Within the PlasmonX experiment at FLAME, a spectrometer is being constructed to perform these measurements. It is made of an electro-magnet and a screen made of scintillating fibers for the measurement of the trajectories of the particles. The large range of operation, the huge number of particles and the need to focus the divergence, present challenges in the design and construction of such a device. We present the design considerations for this spectrometer that lead to the use of scintillating fibers, multichannel photo-multipliers and a multiplexing electronics, a combination which is innovative in the field. We also present the experimental results obtained with a high intensity electron beam performed on a prototype at the LNF beam test facility. (C) 2011 Elsevier B.V. All rights reserved.

Journal/Review: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

Volume: 653 (1)      Pages from: 42  to: 46

KeyWords: Laser Wakefield Acceleration; magnetic spectrometer;
DOI: 10.1016/j.nima.2011.02.007

Citations: 2
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English