论文标题
电子回旋共振离子源的受控湍流状态，以改善多料离子性能
Controlled turbulence regime of electron cyclotron resonance ion source for improved multicharged ion performance
论文作者
论文摘要
强烈的非Qulibrium热等离子体的激发和非线性进化的基本研究，限制在开放式磁陷阱中，这表明了对常规电子环状共振（ECR）离子源进行微调的新机会。这些设备被广泛用于生产高电荷态离子的粒子梁。以受控的湍流状态运行离子源可以增加吸收的功率密度，因此在被ECR表面包围的放电的密集部分中的体积等离子体能量含量，从而导致高电荷态离子的增强梁电流。我们报告了JYFL加速器实验室的ECR离子源的实验，其中采用新方法允许将多音算离子束电流提高两次，例如到95 $μ$ a $ $^{7+} $，仅在11.56 GHz时获得280 W的功率。提出了支持和解释实验发现的理论模型。该研究表明，受控的湍流机制有可能增强现代高性能离子源的束电流，包括最先进的超导设备。
Fundamental studies of excitation and non-linear evolution of kinetic instabilities of strongly nonequlibrium hot plasmas confined in open magnetic traps suggest new opportunities for fine-tuning of conventional electron cyclotron resonance (ECR) ion sources. These devices are widely used for the production of particle beams of high charge state ions. Operating the ion source in controlled turbulence regime allows increasing the absorbed power density and therefore the volumetric plasma energy content in the dense part of the discharge surrounded by the ECR surface, which leads to enhanced beam currents of high charge state ions. We report experiments at the ECR ion source at the JYFL accelerator laboratory, in which adopting of a new approach allows to increase the multicharged ion beam current up to two times, e.g. to 95 $μ$A of O$^{7+}$ achieved with mere 280 W power at 11.56 GHz. A theoretical model supporting and explaining the experimental findings is presented. The study suggests that the controlled turbulence regime has the potential to enhance the beam currents of modern high-performance ion sources, including state-of-the-art superconducting devices.
