Requirements and Conceptual Superconducting Magnet Design for a 21 T Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Painter, T.A.; Markiewicz, W.D.; Miller, J.R.; Bole, S.; Dixon, I.R.; Cantrell, K.R.; Kenney, S.J.; Trowell, A.J.; Kim, Dong Lak; Lee, Byoung Seob; Choi, Yeon Suk; Kim, Hyun Sik; Hendrickson, Christopher L.; Marshall, A. G.

doi:10.1109/tasc.2005.869678

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…There are different ways to solve this problem and to improve the data depth and accuracy for such complex samples as crude oil. One is to use higher magnetic fields, which leads to better transient resolution, and the construction of a 21 T FT‐ICR system to achieve this is underway . Another way might be to make better use of other tailored excitation waveform for better dynamic range or different phasing algorithms for a better data depth of the FT‐ICR operation.…”

mentioning

confidence: 99%

Expanding the data depth for the analysis of complex crude oil samples by Fourier transform ion cyclotron resonance mass spectrometry using the spectral stitching method

Gaspar

Schräder

2012

Rapid Comm Mass Spectrometry

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mentioning

confidence: 99%

Expanding the data depth for the analysis of complex crude oil samples by Fourier transform ion cyclotron resonance mass spectrometry using the spectral stitching method

Gaspar

Schräder

2012

Rapid Comm Mass Spectrometry

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“…In this design strategy, the primary coils provide a magnetic field strength near the target requirement in the central area. The resting field strength, homogeneity and shielding are determined through a similar optimization as the short solenoid global optimization [29][30][31]. There are five long solenoids constituting the primary coils, four adjusting coils and two shielding coils for the magnet design.…”

Section: Long Solenoid Compensating Field Optimizationmentioning

confidence: 99%

Actively-shielded ultrahigh field MRI/NMR superconducting magnet design

Wang

et al. 2021

Supercond. Sci. Technol.

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Active shielding technology has been widely applied to the superconducting magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) magnets design, revealing excellent performance on the stray field control. For such a highly homogeneous field superconducting magnet design, an appropriate optimization strategy is essential to guarantee the magnetic field homogeneity in the central region and the expected 5 Gauss line range, especially for the ultrahigh field superconducting magnet. Based on the compensating field optimization method, an actively-shielded whole-body 14T MRI magnet and an actively-shielded 1.3GHz NMR magnet were presented, and detailed analyses were conducted to evaluate the feasibility of the designs. The developed magnet design method, coil pattern, wire arrangement, and stress/strain adjustment will be used to guide the corresponding project implementation.

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“…1 shows the cross-sectional view of the superconducting coils for a 21 T FT-ICR design and the coil dimensions are summarized in Table II. Detailed superconducting magnet conceptual design is available [9]. The current fraction of the superconductor is nominally 70% of the critical current at the maximum field on each coil.…”

Section: Introductionmentioning

confidence: 99%

Closed-Loop Cryogenic Cooling for a 21 T FT-ICR Magnet System

Choi¹,

Kim

Painter

et al. 2008

IEEE Trans. Appl. Supercond.

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A closed-loop cooling concept for 21 T Fourier transform ion cyclotron resonance (FT-ICR) superconducting magnets is presented. In the magnet system, low temperature superconducting coils are immersed in a subcooled 1.8 K bath, which is connected to the saturated helium reservoir through the weight load relief valve. Saturated liquid helium is refrigerated by a Joule-Thomson (JT) heat exchanger and flows through the JT valve, isenthalpically dropping its pressure to approximately 1.6 kPa, corresponding to a saturation temperature of 1.8 K. Helium gas exhausted from JT pump is liquefied by a two-stage cryocooler located after the vapor purify system. In the present paper, the amount of heat budget is determined and the structural design of cryostat is carried out by the relevant analyses. The position of a cryocooler in the magnet system is investigated, taking into account the requirement of magnetic field for normal performance. Helium liquefaction system, a key component of the closed-loop cooling system, is fabricated and tested in order to demonstrate the feasibility of our new cryogenic cooling for high field magnets.

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Requirements and Conceptual Superconducting Magnet Design for a 21 T Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Cited by 9 publications

References 10 publications

Expanding the data depth for the analysis of complex crude oil samples by Fourier transform ion cyclotron resonance mass spectrometry using the spectral stitching method

Expanding the data depth for the analysis of complex crude oil samples by Fourier transform ion cyclotron resonance mass spectrometry using the spectral stitching method

Actively-shielded ultrahigh field MRI/NMR superconducting magnet design

Closed-Loop Cryogenic Cooling for a 21 T FT-ICR Magnet System

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