title: Pulse error compensating symmetric magic-echo trains.
abstract: We present improved line-narrowing sequences for dipolar coupled spin systems, based on a train of magic-echoes which are compensated for the effects of finite pulse widths and utilize symmetry properties of supercycles. Sequences are introduced for spectroscopy and imaging by proper choice of a phase alternating scheme. Using a 16 pulse time-suspension magic-echo cycle, the highest level of line-narrowing achieved was 2.7 Hz for the [100] direction of a single crystal of calcium fluoride, a reduction in linewidth by 4 orders of magnitude.
authors.affiliation: Department of Nuclear Engineering, Massachusetts Institute of Technology, NW14-2217, 150 Albany Street, Cambridge, MA 02139, USA.
authors.forename: G S
authors.initials: GS
authors.lastname: Boutis
authors.forename: P
authors.initials: P
authors.lastname: Cappellaro
authors.forename: H
authors.initials: H
authors.lastname: Cho
authors.forename: C
authors.initials: C
authors.lastname: Ramanathan
authors.forename: D G
authors.initials: DG
authors.lastname: Cory