The RF-driven negative ion source testbed BATMAN upgrade is being developed at IPP Garching in the framework of the ion source development for ITER and DEMO neutral beam injection systems. The testbed has recently been enhanced to allow for steady state operation with a focus on beam optics studies. The previous titanium sublimation pumps and inertial calorimeter limited the beam pulse length to about 6 s every 3 min. The upgrade comprises a long-pulse compatible, actively cooled diagnostic calorimeter. This has been designed and is currently being manufactured to substitute the inertially cooled calorimeter that has limited diagnostic capabilities. The new diagnostic calorimeter consists of a copper plate with dimensions of 910 × 660 × 25 mm³ placed about 2 m from the ion source extraction grids, and through a novel solution, it will provide a 2D profile of beam power density with a 20 mm spatial resolution. Water flowing through cooling channels embedded in the copper plate will actively cool the calorimeter, which is loaded with about 160 kW beam power at ITER-relevant current density, but 45 kV acceleration. A fraction of the beam will pass through many small apertures (ø2 mm) positioned in the calorimeter plate and will be collected by thin (0.2 mm) copper foils attached to the calorimeter back side. Evaluation of power density will be performed by measuring the temperature of the heat flux foils with a high-resolution infrared camera observing the calorimeter from the back side and calibrated by thermocouples.

中文翻译：

---

负离子源测试台BATMAN升级版长脉冲诊断量热仪

在ITER和DEMO中性束注入系统的离子源开发框架内，IPP Garching正在开发RF驱动的负离子源测试台BATMAN升级。最近对测试台进行了增强，使其能够专注于光束光学研究，从而实现稳态操作。以前的钛热升华泵和惯性量热仪将光束脉冲长度每3分钟限制为大约6 s。升级包括长脉冲兼容的主动冷却诊断量热仪。它已被设计并正在制造中，以替代诊断能力有限的惯性冷却量热仪。新的诊断量热仪由尺寸为910×660×25 mm ³的铜板组成放置在距离子源提取栅格约2 m处，并通过一种新颖的解决方案，它将以20 mm的空间分辨率提供2D的束功率密度分布图。流过嵌入铜板中的冷却通道的水将积极冷却量热计，该量热计在与ITER相关的电流密度下负载约160 kW的束功率，但加速度为45 kV。一小部分光束将穿过位于量热计板上的许多小孔（ø2mm），并且将被附着在量热计背面的薄（0.2 mm）铜箔收集。功率密度的评估将通过使用高分辨率红外热像仪测量热通箔的温度来进行，该红外热像仪从背面观察量热计并通过热电偶进行校准。