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TUPSB24 |
Measurements of Undulator and Laser Radiation Parameters of the Novosibirsk FEL Facility | |
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Funding: The reported study was funded by RFBR according to the research project 20-32-90138 Novosibirsk free electron laser (NovoFEL) facility operates with three FELs. The FELs are installed on one-, two- and four- track energy recovery linacs (ERLs) with a common accelerating system. The ERL type of accelerator allows to achieve high average electron current (about 10 mA) and getting the high average FEL power (more than 100 W). The FEL lasing requires the special conditions of the electron beam. To control and tune the electron beam parameters the diagnostic system was developed. It is installed on the ERL fourth track with an electron beam energy of about 40 MeV. The diagnostic complex uses the synchrotron radiation (SR) from the bending magnets and the optical transition radiation (OTR) from the aluminum foil for the measurements of the electron beam transverse profile before and after the FEL undulators. Recently the development of a new measurement system has started, the system will allow us to measure the spontaneous radiation from undulator and lasing parameters of 3rd FEL. The measurement of the spontaneous undulator radiation is a quite challenging task because of its low intensity and spectrum in a middle infrared area. The calculations, planned experiments and the first results from the new measurement system are presented. |
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