| DATE: |
2013-04-17 15:00 - 16:00 |
| PLACE: |
Meeting Room in 3 go-kan 1st floor |
| TITLE: |
The Euro-Gammas Proposal for the ELI-NP Gamma Beam System |
| CONTACT: |
Junji URAKAWA |
| SPEAKER: |
Luca SERAFINI (INFN/Milano and INFN/LNF)) |
| LANGUAGE: |
English |
| ABSTRACT: |
INFN, through its SPARCLAB team, is coordinating Euro-Gammas, a European Collaboration together with CNRS (Orsay-LAL), Université Paris Sud, STFC (Astec) and University of Rome La Sapienza, aiming at submitting a proposal for the ELI-NP Gamma Beam System to be built in Romania (Bucharest), in the frame of the ELI-NP research infrastructure, the third pillar of the large European initiative called ELI (Extreme Light Infrastructure). The Gamma Beam System aims at producing a mono-chromatic high spectral density and brilliance gamma ray beam, tunable in the range of energy between 1 and 20 MeV, with bandwidth smaller than 0.5% and spectral density larger than 104 photons/s.eV, which means performances one order of magnitude better than the present state of the art. I will describe the solution we are proposing in our TDR, based on a 720 MeV C-band Linac driving a multi-bunch high brightness electron beam to collide with a high average power recirculated Laser, carrying a J-class pulse, in order to produce Gamma ray photons via Compton back-scattering. We are considering an innovative scheme to enhance the photon flux keeping its bandwidth very small: it is based on a laser recirculator device made of two confocal mirrors and a sequence of flat mirror pairs, which brings the laser pulse back to the collision point over the entire duration of the multi-bunch train (500 ns). In this way the effective rep rate of the collisions is enhanced from the natural 100 Hz of the RF up to several kHz, increasing the luminosity of the Comtpon Source. |
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