EPR
DNP and Electron Paramagnetic Resonance (EPR) of Substitutional Nitrogen in Diamond at 7 and 14 T
Amit Israelstam, Eyal Laster, Orit Nir-Arad - @DNP_EPR
EPR and DNP-enhanced 13C NMR measurements on our home-built dual DNP/EPR spectrometer reveal unknown properties of substitutional nitrogen centers in diamond, which are used to interpret their DNP spectra. High field EPR data is shown indispensable for both diamond defect spin system characterization and DNP spectral analysis.
Dynamic nuclear polarization by two-pulse phase modulation
Venkata SubbaRao Redrouthu - @rvsubbarao
The coherent transfer of electron spin polarization to nuclei by means of a microwave pulse sequence is a promising new approach to enhancing the sensitivity of solid-state nuclear magnetic resonance (NMR). The development of pulse sequences for dynamic nuclear polarization (DNP) of bulk nuclei is far from complete, as is the understanding of what makes a good DNP sequence. In this context, we introduce a new sequence, termed Two-Pulse Phase Modulation (TPPM) DNP. We provide a general theoretical description for electron–proton polarization transfer by periodic DNP pulse sequences and find it in excellent agreement with numerical simulations.
Probing Spin-Photon Systems with Double Split-Ring Surface Resonator at 4.2 T and 115 GHz
Michael Coumans - @Mike_coumans13
Biochemical structures and 2-dimensional materials are not easily studied using Electron Paramagnetic Resonance at high magnetic fields using conventional resonators. Surface resonators, like our Double Split-Ring Resonator for 115 GHz, improve the microwave coupling by up to 80X, providing scientists the capability to study these materials with ~ns temporal resolution!
Improving XiX DNP with optimal control
Shebha Anandhi Jegadeesan - @AnandhiJ61993
We use quantum optimal control algorithm to improve XiX DNP. The optimized DNP sequences with initial pulse lengths of 12 and 20 ns gave enhancements 2.4 and 1.6 times greater than XiX DNP, respectively. The challenges and anomaly between the numerical simulations and experiments will be addressed in the poster.