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Versatile compact heater design for in situ nano-tomography by transmission X-ray microscopy.
Journal of Synchrotron Radiation ( IF 2.5 ) Pub Date : 2020-04-16 , DOI: 10.1107/s1600577520004567
Stephen Antonelli 1 , Arthur Ronne 2 , Insung Han 3 , Mingyuan Ge 1 , Bobby Layne 4 , Ashwin J Shahani 3 , Kazuhiro Iwamatsu 4 , James F Wishart 4 , Steven L Hulbert 1 , Wah Keat Lee 1 , Yu Chen Karen Chen-Wiegart 1 , Xianghui Xiao 1
Affiliation  

A versatile, compact heater designed at National Synchrotron Light Source‐II for in situ X‐ray nano‐imaging in a full‐field transmission X‐ray microscope is presented. Heater design for nano‐imaging is challenging, combining tight spatial constraints with stringent design requirements for the temperature range and stability. Finite‐element modeling and analytical calculations were used to determine the heater design parameters. Performance tests demonstrated reliable and stable performance, including maintaining the exterior casing close to room temperature while the heater is operating at above 1100°C, a homogenous heating zone and small temperature fluctuations. Two scientific experiments are presented to demonstrate the heater capabilities: (i) in situ 3D nano‐tomography including a study of metal dealloying in a liquid molten salt extreme environment, and (ii) a study of pore formation in icosahedral quasicrystals. The progression of structural changes in both studies were clearly resolved in 3D, showing that the new heater enables powerful capabilities to directly visualize and quantify 3D morphological evolution of materials under real conditions by X‐ray nano‐imaging at elevated temperature during synthesis, fabrication and operation processes. This heater design concept can be applied to other applications where a precise, compact heater design is required.

中文翻译:

多功能紧凑型加热器设计,用于通过透射 X 射线显微镜进行原位纳米断层扫描。

提出了一种由国家同步加速器光源 II 设计的多功能紧凑型加热器,用于全视场透射 X 射线显微镜中的原位 X 射线纳米成像。纳米成像的加热器设计具有挑战性,需要将严格的空间限制与温度范围和稳定性的严格设计要求结合起来。有限元建模和分析计算用于确定加热器设计参数。性能测试表明,加热器在1100℃以上工作时,外壳保持接近室温,加热区均匀,温度波动小,性能可靠稳定。提出了两个科学实验来证明加热器的功能:(i)原位3D 纳米断层扫描,包括液态熔盐极端环境中金属脱合金的研究,以及(ii)二十面体准晶体中孔隙形成的研究。两项研究中结构变化的进展都在 3D 中得到了清晰的解决,表明新型加热器具有强大的功能,可以通过在合成、制造和生产过程中高温下的 X 射线纳米成像,直接可视化和量化真实条件下材料的 3D 形态演化。操作流程。该加热器设计概念可应用于需要精确、紧凑的加热器设计的其他应用。
更新日期:2020-04-16
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