艺术品分析用1米长750兆赫射频四极杆的射频测量和调谐
rf measurements and tuning of the 1-meter-long 750 MHz radio-frequency quadrupole for artwork analysis
摘要：
由欧洲核子研究中心开发和制造的750兆赫PIXE-X射线（射频四极）提供一米长的2 MeV质子，用于文化遗产艺术品的质子诱导X射线发射分析（PIXE）。在这篇论文中，我们报告了PIXE-STUDIO的低功率射频测量和调谐，这些测量和调谐已于2020年年中完成。采用一种基于直接测量响应矩阵的新算法，只需两步即可同时调谐磁场和频率，达到满意的精度。此外，我们报告的测量单个模块，品质因数，耦合强度。在所有情况下，观察到射频测量和设计值之间非常好的协议。
英文摘要：
The 750 MHz PIXE-RFQ (radio-frequency quadrupole), developed and built at CERN, provides 2 MeV protons over a length of one meter for proton-induced X-ray emission analysis (PIXE) of cultural heritage artwork. In this paper, we report low-power rf measurements and tuning of the PIXE-RFQ, which have been completed mid-2020. Using a novel algorithm based on direct measurements of the response matrix, field and frequency could tuned at the same time in only two steps to satisfying accuracy. Additionally, we report measurements of single modules, quality factors, and coupling strength. In all cases, very good agreement between rf measurement and design values was observed.
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