@article {249,
	title = {Room-temperature operation of a radiofrequency diamond magnetometer near the shot-noise limit},
	journal = {Journal of Applied Physics},
	volume = {112},
	year = {2012},
	note = {J Appl Phys061ECTimes Cited:1Cited References Count:15},
	month = {Dec 15, 2012},
	pages = {124519},
	chapter = {124519},
	abstract = {<p>We operate a nitrogen-vacancy (NV-) diamond magnetometer at ambient temperatures and study the dependence of its bandwidth on experimental parameters including optical and microwave excitation powers. A model based on the Bloch equations is used to analyze the NV center\&$\#$39;s response time, tau, during continuous optical and microwave irradiation, and tau(-1) is shown to be a weighted average of T-1(-1) and T-2(-1), where T-1 and T-2 are the longitudinal and transverse relaxation times of the electron spin during optical irradiation. We measured a maximum detection bandwidth of similar to 1.6 MHz with optical excitation intensity of similar to 2.3MW/cm(2), limited by the available optical power. The sensitivity of the NV ensemble for continuous-wave magnetometry in the presence of photon shot noise is analyzed. Two detection schemes are compared, one involving modulation of the fluorescence by an oscillating magnetic field while the microwave frequency is held constant, and the other involving double modulation of the fluorescence when the microwave frequency is modulated during the detection. For the first of these methods, we measure a sensitivity of 4.6 +/- 0.3 nT/root Hz, unprecedented in a detector with this active volume of similar to 10 mu m(3) and close to the photon-shot-noise limit of our experiment. The measured bandwidth and sensitivity of our device should allow detection of micro-scale NMR signals with microfluidic devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4771924]</p>
},
	keywords = {spin},
	isbn = {0021-8979},
	doi = {Doi 10.1063/1.4771924},
	url = {http://link.aip.org/link/doi/10.1063/1.4771924},
	author = {Shin, C. S. and Avalos, C. E. and Butler, M. C. and Trease, D. R. and Seltzer, S. J. and Mustonen, J. P. and Kennedy, D. J. and Acosta, V. M. and Budker, D. and Pines, A. and Bajaj, V. S.}
}
@article {286,
	title = {Multipole shimming of permanent magnets using harmonic corrector rings},
	journal = {Review of Scientific Instruments},
	volume = {78},
	year = {2007},
	note = {Rev Sci Instrum151WETimes Cited:8Cited References Count:8},
	month = {Mar},
	abstract = {<p>Shimming systems are required to provide sufficient field homogeneity for high resolution nuclear magnetic resonance (NMR). In certain specialized applications, such as rotating-field NMR and mobile ex situ NMR, permanent magnet-based shimming systems can provide considerable advantages. We present a simple two-dimensional shimming method based on harmonic corrector rings which can provide arbitrary multipole order shimming corrections. Results demonstrate, for example, that quadrupolar order shimming improves the linewidth by up to an order of magnitude. An additional order of magnitude reduction is in principle achievable by utilizing this shimming method for z-gradient correction and higher order xy gradients. (c) 2007 American Institute of Physics.</p>
},
	keywords = {field},
	isbn = {0034-6748},
	doi = {Doi 10.1063/1.2713438},
	url = {<Go to ISI>://WOS:000245320800056},
	author = {Jachmann, R. C. and Trease, D. R. and Bouchard, L. S. and Sakellariou, D. and Martin, R. W. and Schlueter, R. D. and Budinger, T. F. and Pines, A.}
}
