| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Unified Analysis for Calculating the Incoherent Spontaneous Emission of Cooperative Radiations |
| Hesham Fares1,2**, Enrica Chiadroni1 |
1INFN-LNF, via Enrico Fermi 40, 00044 Frascati, Rome, Italy
2Department of Physics, Faculty of Science, Assiut University, Assiut 71516, Egypt
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Hesham Fares, Enrica Chiadroni 2017 Chin. Phys. Lett. 34 114101 |
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Abstract A unified analysis is presented to calculate the incoherent spontaneous power of cooperative radiations based on self-amplified spontaneous emission. Using quantum mechanical tools, we derive analytical expressions for the incoherent spontaneous power of undulator and Cherenkov free-electron lasers (FELs). The undulator and Cherenkov FELs are considered as two different examples for the radiation that accumulate cooperatively. In the case of the undulator FEL, we show an excellent agreement between an expression for the incoherent radiation power derived in the present work and that obtained using a completely different approach [Phys. Rev. E 65 (2002) 026501]. For the Cherenkov radiation, we demonstrate a satisfactory agreement between the incoherent power predicted in our analysis and previous experimental results.
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Received: 17 July 2017
Published: 25 October 2017
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| Fund: Supported by the ASRT-INFN Joint Project between the Academy of Scientific Research and Technology in Egypt and INFN in Italy. |
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