A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   V   W   Y   Z    

Schiavi, A.

 
Paper Title Page
WG311 Quantum Regime of SASE FELS  
 
  • R. Bonifacio
    INFN-Milano, Milano
  • N. Piovella
    Universita' degli Studi di Milano, Milano
  • G. R.M. Robb
    USTRAT/SUPA, Glasgow
  • A. Schiavi
    Rome University La Sapienza, Roma
 
  The novel quantum regime of an high-gain FEL operating in the SASE mode is expected to produce high coherent X-ray radiation, with a narrow spectrum. The theory, based on a Schroedinger-like equation coupled self-consistently to the Maxwell equations, shows that the dynamics depends on a single quantum parameter r, interpreted as the ratio between the classical momentum spread and the photon recoil momentum. In the quantum regime, r < 1, the spectrum is a series of narrow lines, associated to transitions between discrete momentum eigenstates and resulting in high temporal coherence. The classical SASE regime, with random spiking behavior and broad spectrum, is obtained increasing r until the linewidth becomes larger than the frequency separation. We intend to investigate the feasibility of a future experiment of quantum SASE using an e.m. wiggler, by developing a 3D numerical code which will take into account transverse and emittance effects.  
slides icon Slides