Physical design of a compact electron linear accelerator

Recent years have seen a rising demand for effective treatments driven by heightened concerns about cancer and other diseases. Among various types of accelerators, the electron linear accelerator has emerged as a promising option for miniaturization. In response to this need, we have completed a comprehensive physical design of a compact side-coupled electron linear accelerator operating at 9.3[Formula: see text]GHz. This design encompasses the development of the electron gun, optimization of the accelerating cavity, tuning of the cavity chain, design of the power coupler and final dynamic verification. The resulting electron linear accelerator operates at an energy level of 6[Formula: see text]MeV, with the main accelerating structure not exceeding 0.3[Formula: see text]m in length. It generates an exit beam current of over 100[Formula: see text]mA, with the beam spot radius measuring less than 1.5[Formula: see text]mm, and achieves a high transmission efficiency of 78.7%. These specifications fully satisfy the requirements for contemporary medical applications and other fields.