SPIRAL RESONANT CAVITY HAVING T-SHAPED INNER CONDUCTOR FOR SUPERCONDUCTING CYCLOTRON

摘要

A spiral resonant cavity having a T-shaped inner conductor for a superconducting cyclotron. The resonant cavity is symmetrically distributed in a main magnet valley of a cyclotron, and comprises an upper resonant cavity body (10) and a lower resonant cavity body (9). The upper resonant cavity body (10) and the lower resonant cavity body (9) have symmetrically identical structures, and are electrically connected to each other by means of a first reed (7). The lower resonant cavity body (9) comprises an accelerating electrode Dee plate (1), an inner rod (3), a spiral high-frequency cavity body (4), cavity body water-cooling tubes (5), and an accelerating electrode Dee plate water-cooling tube (6). The accelerating electrode Dee plate (1) and the inner rod (3) are connected by means of a bolt. The accelerating electrode Dee plate water-cooling tube (6) is provided within the accelerating electrode Dee plate (1). The cavity body water-cooling tubes (5) are uniformly brazed on the inner surface of the spiral high-frequency cavity body (4). The compact high-strength resonant cavity effectively solves the problems of insufficient structural strength of a single inner rod of a conventional compact cyclotron and poor cooling effect thereof while satisfying physical design requirements such as the resonant frequency, voltage distribution, and Q value of a resonant cavity.