Generation of Intense THz Radiation by Using a Compact Free Electron Laser and Relativistic Plasma

Free electron laser (FEL) is the most powerful source in the THz range. The main task is to decrease its size and cost to a laboratory scale. An inexpensive and compact THz FEL has been developed at KAERI (Y.U. Jeong et al., 2001), (Y.U. Jeong et al., 2005) and it is expected to play an important role in encouraging advanced THz applications for biomedical imaging due to its higher power and spectral brightness when compared to the table-top sources.