Data di Pubblicazione:
2006
Citazione:
Quantum regime of free electron lasers starting from noise / R. Bonifacio, N. Piovella, G.R.M. Robb, A. Schiavi. - In: PHYSICAL REVIEW SPECIAL TOPICS. ACCELERATORS AND BEAMS. - ISSN 1098-4402. - 9:9(2006 Sep 05), pp. 090701.090701-1-090701.090701-9. [10.1103/PhysRevSTAB.9.090701]
Abstract:
We investigate the quantum regime of a high-gain free-electron laser (FEL) starting from noise. In the first part, we neglect the radiation propagation and we formulate a quantum linear theoryof the N-particle free-electron laser Hamiltonian model, quantizing both the radiation field and the electron motion. Quantum effects such as frequency shift, line narrowing, quantum limitation
for bunching and energy spread and minimum uncertainty states are described. Using a second quantization formalism we demonstrate quantum entanglement between the recoiling electrons and the radiation field. In the second part, we describe the field classically but we include propagation
effects (i.e. slippage) and we demonstrate the novel regime of quantum SASE with high temporal coherence and discrete spectrum. Furthermore, we describe "quantum purification" of SASE: the classical chaotic spiking behavior disappears and the spectrum becomes a series of discrete very narrow lines which correspond to transitions between discrete momentum eigenstates (which
originate high temporal coherence).
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
FEL ; QUANTUM ; COHERENCE ;LASER ; RAGGI X
Elenco autori:
R. Bonifacio, N. Piovella, G.R.M. Robb, A. Schiavi
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