The new generation internal beam dump of the Super Proton Synchrotron (SPS) at CERN will have to dissipate approximately 270 kW of thermal power, deposited by the primary proton beam. For this purpose, it is essential that the cooling system features a very efficient heat evacuation. Diffusion bonding assisted by hot isostatic pressing (HIP) was identified as a promising method of joining the cooling circuits and the materials of the dumps core in order to maximize the heat transfer efficiency. This paper presents the investigation of HIP assisted diffusion bonding between two CuCr1Zr blanks enclosing SS 316L tubes and the realization of a real size prototype of one of the dump’s cooling plates, as well as the assessments of its cooling performance under the dump’s most critical operational scenarios. Energy-dispersive x-ray spectroscopy, microstructural analyses, measurements of thermal conductivity, and mechanical strength were performed to characterize the HIP diffusion bonded interfaces (CuCr1Zr-CuCr1Zr and CuCr1Zr-SS 316L). A test bench allowed to assess the cooling performance of the real size prototype. At the bonded interface, the presence of typical diffusional phenomena was observed. Moreover, measured tensile strength and thermal conductivity were at least equivalent to the lowest ones of the materials assembled and comparable to its bulk properties, meaning that a good bonding quality was achieved. Finally, the real size prototype was successfully tested with an ad hoc thermal test bench and with the highest operational thermal power expected in the new generation SPS internal beam dump. These results demonstrated the possibility to use HIP as a manufacturing technique for the cooling plates of the new generation SPS internal beam dump, but they also open up the way for further investigations on its exploitability to improve the cooling performance of any future high intensity beam intercepting device or in general devices requiring very efficient heat evacuation systems.

中文翻译：

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热等静压辅助扩散键合，用于CERN的Super Proton Synchrotron内部束流收集器

CERN的超级质子同步加速器（SPS）的新一代内部束流收集器将必须耗散约270 kW的热能，该热能由主质子束沉积。为此，冷却系统必须具有非常高效的排热功能，这一点至关重要。通过热等静压（HIP）辅助的扩散结合被认为是将冷却回路和堆芯材料连接起来以最大化传热效率的一种有前途的方法。本文介绍了在两个封闭SS 316L管的CuCr1Zr毛坯之间进行HIP辅助扩散结合的研究，以及一个堆场冷却板的真实尺寸原型的实现，以及在该堆场最关键的操作场景下对其冷却性能的评估。 。能量色散X射线光谱仪 进行了微观结构分析，热导率和机械强度的测量，以表征HIP扩散键合界面（CuCr1Zr-CuCr1Zr和CuCr1Zr-SS 316L）。一个测试台可以评估实际尺寸原型的冷却性能。在结合界面处，观察到典型扩散现象的存在。此外，测得的拉伸强度和导热率至少等于组装的最低材料，并且与其整体性能相当，这意味着获得了良好的粘合质量。最后，实际尺寸的原型已成功通过 一个测试台可以评估实际尺寸原型的冷却性能。在结合界面处，观察到典型扩散现象的存在。此外，测得的拉伸强度和导热率至少等于组装的最低材料，并且与其整体性能相当，这意味着获得了良好的粘合质量。最后，实际尺寸的原型已成功通过 一个测试台可以评估实际尺寸原型的冷却性能。在结合界面处，观察到典型扩散现象的存在。此外，测得的拉伸强度和导热率至少等于组装的最低材料，并且与其整体性能相当，这意味着获得了良好的粘合质量。最后，实际尺寸的原型已成功通过广告 特别热试验台上，并与预期在新一代的最高操作火力发电SPS内部光束转储。这些结果表明，可以将HIP用作新一代SPS内部光束收集器冷却板的制造技术，但它们也为进一步研究其可利用性以改善未来任何高强度光束拦截的冷却性能开辟了道路。设备或通常需要高效排热系统的设备。