摘要 : The temperature distribution and heat flow at equilibrium of the plasma generator of the rf-powered noncesiated Linac4 H−</sup> ion source have been studied with a finite element model. It is shown that the equilibrium temperature... 展开 The temperature distribution and heat flow at equilibrium of the plasma generator of the rf-powered noncesiated Linac4 H−</sup> ion source have been studied with a finite element model. It is shown that the equilibrium temperatures obtained in the Linac4 nominal operation mode (100 kW rf power, 2 Hz repetition rate, and 0.4 ms pulse duration) are within material specifications except for the magnet cage, where a redesign may be necessary. To assess the upgrade of the Linac4 source for operation in the high-power operation mode of the Superconducting Proton Linac (SPL), an extrapolation of the heat load toward 100 kW rf power, 50 Hz repetition rate, and 0.4 ms pulse duration has been performed. The results indicate that a significant improvement of the source cooling is required to allow for operation in the high-power mode of SPL. © 2010 American Institute of Physics Article Outline INTRODUCTION THE LINAC4 H−</sup> SOURCE FINITE ELEMENT THERMAL STUDY OF THE LINAC4 SOURCE RESULTS AND DISCUSSION CONCLUSIONS AND OUTLOOK 收起