TY - GEN
T1 - Feasibility study of steady-state surface NMR with adiabatic pulses
AU - Hardenberg, M.
AU - Griffiths, M.~P.
AU - Grombacher, D.
AU - Larsen, Jakob Juul
PY - 2024
Y1 - 2024
N2 - We present the preliminary results of numerical modeling of steady-state surface nuclear magnetic resonance (NMR) with pulse trains composed of adiabatic pulses. The motivation for this research is that adiabatic pulses have been proven highly beneficial in standard single pulse surface NMR where they can be used to increase the signal-to-noise ratio and the ability to resolve the NMR relaxation time. It is therefore of interest if the same benefits translate to the new steady-state surface NMR concept. For numerical modeling, we use a chained network of solvers sweeping over a relevant range of external fields and we consider only non-interacting states governed by the Bloch equation. We demonstrate that pulse trains composed of adiabatic pulses also lead to the formation of steady states. We observe that the property of adiabatic sweeps to reduce the number of nodes and thereby increase the effectively excited volume is retained in the steady-state regime, which depends on the specific type of adiabatic pulses. We also demonstrate an influence on the steady-state signal from the T1 and T2 relaxation times. We conclude that steady-state surface NMR with adiabatic pulses is feasible, but further studies are needed to optimize the concept.
AB - We present the preliminary results of numerical modeling of steady-state surface nuclear magnetic resonance (NMR) with pulse trains composed of adiabatic pulses. The motivation for this research is that adiabatic pulses have been proven highly beneficial in standard single pulse surface NMR where they can be used to increase the signal-to-noise ratio and the ability to resolve the NMR relaxation time. It is therefore of interest if the same benefits translate to the new steady-state surface NMR concept. For numerical modeling, we use a chained network of solvers sweeping over a relevant range of external fields and we consider only non-interacting states governed by the Bloch equation. We demonstrate that pulse trains composed of adiabatic pulses also lead to the formation of steady states. We observe that the property of adiabatic sweeps to reduce the number of nodes and thereby increase the effectively excited volume is retained in the steady-state regime, which depends on the specific type of adiabatic pulses. We also demonstrate an influence on the steady-state signal from the T1 and T2 relaxation times. We conclude that steady-state surface NMR with adiabatic pulses is feasible, but further studies are needed to optimize the concept.
UR - http://www.scopus.com/inward/record.url?scp=85214848543&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.202420051
DO - 10.3997/2214-4609.202420051
M3 - Article in proceedings
T3 - EAGE Conference Proceedings
SP - 1
EP - 5
BT - NSG2024, 30th European Meeting of Environmental and Engineering Geophysics
PB - European Association of Geoscientists and Engineers
ER -