Abstract The magic angle coil spinning ( MACS ) technique has provided a breakthrough in enhancing sensitivity in magic angle spinning ( MAS ) NMR . However, efforts in improving the MACS detector for higher spinning speeds have been lacking. One published MACS construction technique is to solder a handwound solenoidal coil to a commercial non‐magnetic capacitor and subsequently centering the detector inside the MAS rotor. An alternative method to realize these detectors is by using MEMS fabrication at the wafer scale, potentially capable of achieving reproducible MACS detectors. However, it is also important that the performance of the sensors does not deteriorate as a result of microfabrication constraints. The footprint of the detectors is a limiting factor in achieving higher spinning speeds. One of the key elements of a micro‐resonator is its tuning capacitor, whose geometry has a significant influence on its electrical and mechanical performance. The quality factor of the capacitor, along with the induced eddy currents, are the key performance parameters considered. The article addresses these concerns by presenting a study of microfabricated on‐chip capacitors for magic angle coil spinning ( MACS ) detectors. The capacitors are juxtaposed with commercially available capacitors and the most suitable fit to be integrated with a micro‐coil is established.

Shyam S. Adhikari

Ulrike Wallrabe

Vlad Badilita

Jan G. Korvink

Concepts in Magnetic Resonance Part B

磁共振概念 B 部分汇集了参与设计和开发用于磁共振技术的硬件和软件的工程师和物理学家。该杂志欢迎主要来自磁共振成像 (MRI)、核磁共振 (NMR) 和电子顺磁共振 (EPR) 领域的投稿，但也鼓励提交与不太常见的磁共振成像和分析方法相关的投稿。学术界和工业界，报告仪器和计算机编程发展的最新进展，以支持医学、非医学和分析磁共振技术。

Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering brings together engineers and physicists involved in the design and development of hardware and software for magnetic resonance technology. The journal welcomes submissions primarily from the fields of Magnetic Resonance Imaging (MRI), Nuclear Magnetic Resonance (NMR), and Electron Paramagnetic Resonance (EPR), but also encourages contributions related to less common magnetic resonance imaging and analysis methods. Both academia and industry are invited to report the latest advancements in instrument and computer programming developments to support medical, non-medical, and analytical magnetic resonance technologies.

《Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering》汇集了参与设计和开发磁共振技术硬件和软件的工程师和物理学家。该杂志欢迎来自磁共振成像 (MRI)、核磁共振 (NMR) 和电子顺磁共振 (EPR) 领域的投稿，同时也鼓励与不太常见的磁共振成像和分析方法相关的研究。无论是学术界还是工业界，均可报告仪器和计算机编程发展的最新进展，以支持医学、非医学和分析磁共振技术。

Category	Quartile
医学	4
医学, 物理化学	4
医学, 仪器仪表	4
医学, 物理原子、分子和化学物理	4
医学, 光谱学	4

Capacitor re‐design overcomes the rotation rate limit of MACS resonators

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