title: Low temperature probe for dynamic nuclear polarization and multiple-pulse solid-state NMR.
abstract: Here, we describe the design and performance characteristics of a low temperature probe for dynamic nuclear polarization (DNP) experiments, which is compatible with demanding multiple-pulse experiments. The competing goals of a high-Q microwave cavity to achieve large DNP enhancements and a high efficiency NMR circuit for multiple-pulse control lead to inevitable engineering tradeoffs. We have designed two probes-one with a single-resonance RF circuit and a horn-mirror cavity configuration for the microwaves and a second with a double-resonance RF circuit and a double-horn cavity configuration. The advantage of the design is that the sample is in vacuum, the RF circuits are locally tuned, and the microwave resonator has a large internal volume that is compatible with the use of RF and gradient coils.
authors.affiliation: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge MA 02139, USA.
authors.forename: HyungJoon
authors.initials: H
authors.lastname: Cho
authors.forename: Jonathan
authors.initials: J
authors.lastname: Baugh
authors.forename: Colm A
authors.initials: CA
authors.lastname: Ryan
authors.forename: David G
authors.initials: DG
authors.lastname: Cory
authors.forename: Chandrasekhar
authors.initials: C
authors.lastname: Ramanathan
mesh_terms: D003497:Cyclic N-Oxides / Q000737:chemistry; D004867:Equipment Design; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D008872:Microwaves; D011846:Radio Waves; D013696:Temperature
chemical_list: D003497:Cyclic N-Oxides; C003959:TEMPO