The Key Technology Researches About A Novel Compact E-Linac

It is well-known that electron linear accelerator (E-LINAC) has been widely used for various applications. However, its construction is very complicated, its cost relatively high and its maintenance quite difficult, all of these disadvantages have limited its applications. Thus it is very important for extending the applications, to simplify the construction, reduce the cost and make the maintenance easier.Motivation of this research is to demonstrate the feasibility to remove these shortcomings and improve certain performance. The thought to simplify the E-LINAC system is by injecting the spent beam of a klystron into an accelerator section connected collinearly. For further simplification, the klystron can be operated as an oscillator by feeding back part of the microwave from output cavity to the input. If a high Q cavity is included in the feedback circuit to select the frequency, the frequency stability of the system might be made to satisfy the requirement of a LINAC. This novel compact electron LINAC (NCEL) might popularize the application of E-LINC.The point of the NCEL built during the research is that the injecting beam is the spent beam of KS4064-5MW klystron selected by a magnetic field, which has been bunched, occupies small phase width and has higher energy than those generated by an electron gun used in most of E-LINACS.Many problems should be solved to realize the NCEL. The performances of the electron beam, such as energy, intensity, emittance and so on, must satisfy the requirement of an E-LINAC. Based on the experimental results about the characteristics of the spent beam, a 10MeV NCEL has been designed and built. To date, most performances of the accelerated beam have been tested and accorded with the design requirements.