Institution

# Varian Associates

About: Varian Associates is a(n) based out in . It is known for research contribution in the topic(s): Beam (structure) & Amplifier. The organization has 2160 authors who have published 2591 publication(s) receiving 46002 citation(s).
Topics: Beam (structure)

##### Papers
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PatentDOI
TL;DR: In this article, an inversion pulse for wideband application is obtained from a simple nonlinear amplitude modulation wherein the amplitude is modulated in accord with A(t)=A 0 {1-| sin βt| n } and the entire pulse is frequency modulated such that the phase varies as φ(t) =φ 0 + 1/2 kt 2
Abstract: An inversion pulse for wideband application is obtained from a simple nonlinear amplitude modulation wherein the amplitude is modulated in accord with A(t)=A 0 {1-| sin βt| n } and the entire pulse is frequency modulated such that the phase varies as φ(t)=φ 0 +1/2 kt 2

509 citations

Book ChapterDOI
01 Jan 1966

435 citations

Journal ArticleDOI

TL;DR: Near optimal hole doping, the Fermi surface is large and consistent with band calculations, and in underdoped samples with ${T}_{c} of 60\char21{}70 K, portions of this Fermani surface are not seen. Abstract: We report angle-resolved photoemission results on${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{Ca}}_{1\ensuremath{-}x}{\mathrm{Dy}}_{x}{\mathrm{Cu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$and oxygen depleted${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$investigating the electronic structure changes above${T}_{c}$in materials with hole doping levels ranging from insulating to slightly overdoped. Near optimal hole doping, the Fermi surface is large and consistent with band calculations. In underdoped samples with${T}_{c}$of 60--70 K, portions of this Fermi surface are not seen. This change is related to the opening of an energy gap near$(\ensuremath{\pi},0)$above${T}_{c}\$.

423 citations

Journal ArticleDOI
TL;DR: In this article, a simple on-column concentration technique in high-performance capillary electrophoresis (HPCE) is reported, where a short plug of water before sample introduction is injected to provide a high electric field strength from the beginning of the injection.
Abstract: A simple on-column concentration technique in high-performance capillary electrophoresis (HPCE) is reported. In conventional electro-injection in HPCE, samples are prepared in a buffer solution which has the same concentration as that inside the capillary column. The amount of ions injected into the column under this condition is limited. By preparing samples in a low-conductivity solution, e.g., water, and injecting the sample solution electroosmotically into the column, one can achieve a field enhancement at the injection point. The amount of ions injected will then be proportional to this enhancement factor. However, if one samples by switching the column directly from the high-conductivity buffer reservoir to the low-conductivity sample solution, the buffer boundary at the end of the column is disturbed and the electric field at the injection point might not be amplified properly. By injecting a short plug of water before sample introduction, one can provide a high electric field strength from the beginning of the injection. Several hundred-fold enhancements in the amount of injection were confirmed experimentally.

390 citations

PatentDOI
TL;DR: In this article, a method for highly sensitive indirect detection of nuclear magnetic resonance of nuclei having a low gyromagnetic ratio using pulse techniques is presented, which employs a coherent transfer of transverse magnetization from the nuclei of interest to nuclei with high gyromagnetic ratio for which the free induction decay, S (t 2 ), is observed as a function of the length of the time interval, t 1, between imposition of transversal magnetization upon the nucleus of interest and transfer of magnetization to the observed nuclei.
Abstract: A method is disclosed for highly sensitive indirect detection of nuclear magnetic resonance of nuclei having a low gyromagnetic ratio using pulse techniques. The method employs a coherent transfer of transverse magnetization from the nuclei of interest to nuclei of high gyromagnetic ratio for which the free induction decay, S (t 2 ), is observed as a function of the length of the time interval, t 1 , between imposition of transverse magnetization upon the nuclei of interest and transfer of magnetization to the observed nuclei. Contribution to the observed resonances not arising from the transferred transverse magnetization is eliminated and the resulting function S (t 1 , t 2 ) is double Fourier transformed to the frequency domain and displayed as a two dimensional plot for resolving the multiplet spectral structure of the spectra of the nuclei having such low gyromagnetic ratio.

376 citations

##### Authors

Showing all 2160 results

NameH-indexPapersCitations
Richard R. Ernst9635253100
Fred E. Regnier8841225169
Norbert Schuff8828025442
James S. Hyde7941235755
Carl Djerassi77152337630
Ray Freeman7326922872
Robert Kaptein7243624275
Minghwei Hong5851514309
Jesse L. Beauchamp5527510971
Herbert Kroemer522379936
Hans J. Jakobsen492748401
James N. Eckstein421686634
Ivan Bozovic311285060
John Glushka31763004
Gary Virshup241132374
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##### Performance
###### Metrics
No. of papers from the Institution in previous years
YearPapers
20171
20161
20122
20111
20104
20093