The FEL SASE operation, bunch compression and the beam heater期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

The FEL SASE operation, bunch compression and the beam heater

Authors:	G. Dattoli M. Labat P.L. Ottaviani E. Sabia

Affiliation:	^a ENEA, Unità Tecnica Sviluppo di Applicazioni delle Radiazioni, Laboratorio di Modellistica Matematica, Centro Ricerche Frascati, C.P. 65-00044 Frascati, Rome, Italy ^b Università “La Sapienza”, Via A. Scarpa 14, 00161 Rome, Italy ^c LNF-INFN, Frascati, Italy ^d Associato Sezione INFN, Bologna, Italy ^e ENEA, Unità Tecnica Metodi per la Sicurezza dei Reattori e del Ciclo Combustibile, Laboratorio Sviluppo Metodi e Supporto Informatico, Centro Ricerche, Bologna, Italy ^f ENEA, Unità Tecnica Tecnologie Portici, Centro Ricerche Portici, Via Vecchio Macello, 80055 Portici, Napoli, Italy

Abstract:	We discuss the conditions required for an optimal SASE FEL operation when bunch compression techniques are exploited to enhance the bunch peak current. We discuss the case of velocity bunching and magnetic bunch compression. With reference to the latter technique we provide a quantitative estimate of the amount of laser heater power necessary to suppress the micro-bunching instability without creating any problem to the SASE dynamics.

Keywords:	Free electron lasers Landau damping Self amplified spontaneous emission Synchrotron light Electron beam accelerators Coherent synchrotron radiation Micro-bunching instability Laser heater
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