Radiation damping diagnostics

How the 1D‐NOESY suppresses solvent signal in metabonomics NMR spectroscopy: An examination of the pulse sequence components and evolution

“…The optimal mixing period can be determined from an incremented array of mixing times, and the time point yielding the smallest solvent signal chosen. As mentioned, this delay may be substantially shorter than expected due to radiation damping (18, 19–22, 45). To avoid overshooting, we recommend starting with short delays, e.g., 1 ms.…”

Radiation damping at clinical field strength: Characterization and compensation in quantitative measurements

“…RAdiation Damping Difference SpectroscopY (RADDSY) compares relaxation after a short (0.4 ms) rectangular 90° pulse in the absence and presence of RD followed by another 90° readout pulse 32,52 . A shift of a trapezoidal crusher gradient (amplitude $$$ G=14 $$$ mT/m; duration 3 ms) yields two sequence variants: (i) $$$ {90}^{{}^{\circ}}\hbox{--} G\hbox{--} \tau \hbox{--} {90}^{{}^{\circ}}\hbox{--} \mathrm{ADC} $$$ (undamped reference) and (ii) $$$ {90}^{{}^{\circ}}\hbox{--} \tau \hbox{--} G\hbox{--} {90}^{{}^{\circ}}\hbox{--} \mathrm{ADC} $$$ (damped case).…”

“…RAdiation Damping Difference SpectroscopY (RADDSY) compares relaxation after a short (0.4 ms) rectangular 90 • pulse in the absence and presence of RD followed by another 90 • readout pulse. 32,52 A shift of a trapezoidal crusher gradient (amplitude G = 14 mT/m; duration 3 ms) yields two sequence variants: (i) 90 • -G-𝜏-90 • -ADC (undamped reference) and (ii) 90 • -𝜏-G-90 • -ADC (damped case). The ADC (analog-to-digital converter) period indicates the time of signal detection; 𝜏 is an evolution time (between 5 and 6000 ms).…”

Pulsed Field Gradient Nuclear Magnetic Resonance and Diffusion Analysis in Battery Research

“…RD is most readily identified in relaxation measurements, where radiation damping greatly accelerates relaxation processes. , However, effects of RD are widespread, in part because RD also complicates pulse width nutation experiments, thereby extending effects related to miscalibrations to experiments dependent on accurate pulse widths . Previous literature , suggested that the diffusion coefficients in simple spin–echo (Figure a) based PFG-NMR experiments are distorted by RD.…”