Optimization Analysis and Experimental Verification of FID NMR Coil in Polarized 3He Systems

doi:10.11938/cjmr20243099

Abstract

Abstract:

The application of hyperpolarized ³He gas is extensive in fields such as neutron polarimetry, fundamental physics, and diagnostic medicine. The polarimetry measurement is crucial for ³He polarization systems. Typically, a free induction decay nuclear magnetic resonance (FID NMR) coil is used to detect the FID signal of ³He atoms. The measurement signal-to-noise ratio (SNR) of the coil is correlated with factors such as diameter, number of turns, and relative position to the cell. There is limited literature and insufficient experimental verification on the optimization analysis of FID NMR coils. In this study, an SNR model for the coil was established through theoretical analysis of the FID signal and coil noise. The FID NMR coil was experimentally validated in a ³He polarization system based on the metastability-exchange optical pumping (MEOP) technique, which is known for its high polarization efficiency. The experimental results indicated that for a cylindrical cell with both radius and height of r_cell, the optimal SNR of the coil was achieved at a radius of r_cell/2, which was consistent with the theoretical analysis. The relative error of the fitted SNR model was less than 10%, demonstrating its effectiveness. These research findings hold significant practical implications for optimizing the design of ³He polarization systems.

Key words: FID coil design, polarimetry measurement, polarized ³He, MEOP

CLC Number:

O482.53

LUO Qingjin, WU Liangyong, WANG Yuting, YAN Haiyang, XIANG Yifeng, CHEN Siyu. Optimization Analysis and Experimental Verification of FID NMR Coil in Polarized ³He Systems[J]. Chinese Journal of Magnetic Resonance, 2024, 41(3): 266-275.

Figures/Tables 9

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References 22

[1]	WALKER T G. Fundamentals of spin-exchange optical pumping[J]. J Phys: Conf Ser, 2011, 294: 012001.
[2]	YAN S, ZHANG M F, GUO W C, et al. Development of a polarized ³He neutron spin filter based on spin exchange optical pumping at China Mianyang research reactor[J]. Sci China Phys Mech, 2019, 62(10): 1-4.
[3]	GENTILE T R, NACHER P J, SAAM B, et al. Optically polarized ³He[J]. Rev Mod Phys, 2017, 89(4): 045004.
[4]	JIANG C Y. An overview of polarized neutron instruments and techniques in Asia pacific[J]. AAPPS Bulletin, 2023, 33: 21.
[5]	WILD J M, STEWART N J, CHAN H F. Hyperpolarised helium-3 (³He) MRI: physical methods for imaging human lung function[M]// KAUCZOR H, WIELPÜTZ M O. MRI of the lung. Medical Radiology. Springer, Cham, 2017: 69-97.
[6]	LEE W T, ZHENG G, TALBOT C L. Hyperpolarised gas filling station for medical imaging using polarised ¹²⁹Xe and ³He[J]. Magn Reson Imaging. 2021, 79: 112-120.
[7]	CHEN S Z, LAN Y, LI H D, et al. Relationship between lung and brain injury in covid-19 patients: A hyperpolarized ¹²⁹Xe-MRI-based 8-month follow-up[J]. Biomedicines, 2022, 10(4): 781-790.
[8]	LI H D, ZHAO X C, WANG Y J, et al. Damaged lung gas exchange function of discharged covid-19 patients detected by hyperpolarized ¹²⁹Xe MRI[J]. Sci Adv, 2021, 7(1): eabc8180.
[9]	FAROOQ M, CHUPP T, GRANGE J, et al. Absolute magnetometry with ³He[J]. Phys Rev Lett, 2020, 124: 223001.
[10]	NIKIEL A, BL’UMLER P, HEIL W, et al. Ultrasensitive ³He magnetometer for measurements of high magnetic fields[J]. Eur Phys J D, 2014, 68(11): 330.
[11]	YAN H, SUN G A, PENG S M, et al. Searching for new spin- and velocity-dependent interactions by spin relaxation of polarized ³He gas[J]. Phys Rev Lett, 2015,115: 182001.
[12]	YAN H, SUN G A, GONG J, et al. Probing the short range spin dependent interactions by polarized ³He atom beams[J]. Eur Phys J C, 2014,74: 3088.
[13]	CHU P H, DENNIS A, FU C B, et al. Laboratory search for spin-dependent short-range force from axionlike particles using optically polarized ³He gas[J]. Phys Rev D, 2013, 87: 011105.
[14]	ZHENG W, GAO H, LALREMRUATA B, et al. Search for spin-dependent short-range force between nucleons using optically polarized ³He gas[J]. Phys Rev D, 2012, 85: 031505.
[15]	PETUKHOV A K, PIGNOL G, JULLIEN D, et al. Polarized ³He as a probe for short-range spin-dependent interactions[J]. Phys Rev Lett, 2010, 105: 170401.
[16]	WANG C F, LAN Y, YAN H Y, et al. Laser detection of nuclear magnetic resonance FID signal for polarized ³He system[J]. Chinese J Magn Reson, 2022, 39(4): 459-466.
	王昶沣, 兰阳, 闫海洋, 等. 极化³He系统核磁共振FID信号的激光探测[J]. 波谱学杂志, 2022, 39(4): 459-466. doi: 10.11938/cjmr20222987
[17]	TU X Q, ZHENG H, SUN G A, et al. Pickup coil optimization for polarized ³He system[J]. Eur Phys J Plus, 2017, 132: 308.
[18]	闫松. ³He极化率测量系统设计、实现与优化[D]. 北京: 北京交通大学, 2019.
[19]	屠小青. 极化³He中子极化系统研制及其在中子散射中的应用研究[D]. 绵阳: 中国工程物理研究院, 2017.
[20]	YAN S, TU X Q, PENG M. Design and implementation of a monitoring system for measuring polarization degree of optical pumping ³He[J]. Chinese J Magn Reson, 2020, 37(1): 114-122.
	闫松, 屠小青, 彭梅. 光泵抽运³He极化程度监控系统的设计与实现[J]. 波谱学杂志, 2020, 37(1): 114-122. doi: 10.11938/cjmr20192720
[21]	CACIAGLI A, BAARS R J, PHILIPSE A P, et al. Exact expression for the magnetic field of a finite cylinder with arbitrary uniform magnetization[J]. J Magn Magn Mater, 2018, 456: 423-432.
[22]	高晋占. 微弱信号检测[M]. 第三版. 北京: 清华大学出版社, 2019.

	内直径/mm	电阻R/Ω	电感L/mH	调谐后线圈的谐振频率/kHz	品质因数Q
1	5	15.2	0.79	34.60	10.97
2	10	24.8	2.14	34.93	15.63
3	15	36.3	3.82	34.71	20.69
4	20	43.3	5.60	34.78	25.78
5	25	54.9	6.88	34.73	27.91
6	30	65	9.72	34.90	29.75
7	49	97.9	17.27	34.82	35.21
8	59	114.6	21.36	34.90	36.02

编号	V_sig /V	误差	V_N/V	误差	SNR	误差
1	0.04312	0.00018	0.01378	0.00069	3.130	0.16
2	0.22592	0.00079	0.02121	0.00106	10.65	0.53
3	0.52553	0.00156	0.03209	0.00160	16.37	0.82
4	1.14638	0.00411	0.05779	0.00289	19.84	0.99
5	1.61729	0.00520	0.07510	0.00375	21.54	1.08
6	2.21850	0.00630	0.12594	0.00630	17.62	0.88
7	4.26661	0.00905	0.29199	0.01460	14.61	0.73
8	4.62707	0.02263	0.42443	0.02122	10.90	0.54

Optimization Analysis and Experimental Verification of FID NMR Coil in Polarized ³He Systems

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[1]	Chang-feng WANG,Yang LAN,Hai-yang YAN,Mei PENG,Si-yu CHEN. Laser Detection of Nuclear Magnetic Resonance FID Signal for Polarized ³He System [J]. Chinese Journal of Magnetic Resonance, 2022, 39(4): 459-466.
[2]	YAN Song, TU Xiao-qing, PENG Mei. Design and Implementation of a Monitoring System for Measuring Polarization Degree of Optical Pumping ³He [J]. Chinese Journal of Magnetic Resonance, 2020, 37(1): 114-122.