R J Groebner
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Explore the profile of R J Groebner including associated specialties, affiliations and a list of published articles.
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21
Citations
16
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Recent Articles
1.
Haskey S, Grierson B, Stagner L, Chrystal C, Ashourvan A, Bortolon A, et al.
Rev Sci Instrum
. 2018 Nov;
89(10):10D110.
PMID: 30399818
Main-ion charge exchange recombination spectroscopy (MICER) uses the neutral beam induced spectrum to measure the local deuterium ion (D) temperature, rotation, and density, as well as parameters related to the...
2.
Grierson B, Burrell K, Chrystal C, Groebner R, Haskey S, Kaplan D
Rev Sci Instrum
. 2016 Dec;
87(11):11E545.
PMID: 27910689
A new high spatial resolution main-ion (deuterium) charge-exchange spectroscopy system covering the tokamak boundary region has been installed on the DIII-D tokamak. Sixteen new edge main-ion charge-exchange recombination sightlines have...
3.
Chrystal C, Burrell K, Grierson B, Haskey S, Groebner R, Kaplan D, et al.
Rev Sci Instrum
. 2016 Dec;
87(11):11E512.
PMID: 27910369
The charge exchange recombination spectroscopy diagnostic on the DIII-D tokamak has been upgraded with the addition of more high radial resolution view chords near the edge of the plasma (r/a...
4.
Haskey S, Grierson B, Burrell K, Chrystal C, Groebner R, Kaplan D, et al.
Rev Sci Instrum
. 2016 Dec;
87(11):11E553.
PMID: 27910328
Recent completion of a thirty two channel main-ion (deuterium) charge exchange recombination spectroscopy (CER) diagnostic on the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] enables detailed comparisons...
5.
Nazikian R, Paz-Soldan C, Callen J, deGrassie J, Eldon D, Evans T, et al.
Phys Rev Lett
. 2015 Mar;
114(10):105002.
PMID: 25815938
Rapid bifurcations in the plasma response to slowly varying n=2 magnetic fields are observed as the plasma transitions into and out of edge-localized mode (ELM) suppression. The rapid transition to...
6.
Yan Z, McKee G, Fonck R, Gohil P, Groebner R, Osborne T
Phys Rev Lett
. 2014 Apr;
112(12):125002.
PMID: 24724655
Comprehensive 2D turbulence and eddy flow velocity measurements on DIII-D demonstrate a rapidly increasing turbulence-driven shear flow that develops ∼100 μs prior to the low-confinement (L mode) to high-confinement (H...
7.
Eldon D, Bray B, Deterly T, Liu C, Watkins M, Groebner R, et al.
Rev Sci Instrum
. 2012 Nov;
83(10):10E343.
PMID: 23127000
Validation of models of pedestal structure is an important part of predicting pedestal height and performance in future tokamaks. The Thomson scattering diagnostic at DIII-D has been upgraded in support...
8.
Magee R, Galante M, McCarren D, Scime E, Boivin R, Brooks N, et al.
Rev Sci Instrum
. 2012 Nov;
83(10):10D701.
PMID: 23126875
The quality of plasma produced in a magnetic confinement fusion device is influenced to a large extent by the neutral gas surrounding the plasma. The plasma is fueled by the...
9.
Grierson B, Burrell K, Chrystal C, Groebner R, Kaplan D, Heidbrink W, et al.
Rev Sci Instrum
. 2012 Nov;
83(10):10D529.
PMID: 23126869
The neutral-beam induced D(α) emission spectrum contains a wealth of information such as deuterium ion temperature, toroidal rotation, density, beam emission intensity, beam neutral density, and local magnetic field strength...
10.
Chrystal C, Burrell K, Grierson B, Groebner R, Kaplan D
Rev Sci Instrum
. 2012 Nov;
83(10):10D501.
PMID: 23126845
To improve poloidal rotation measurement capabilities on the DIII-D tokamak, new chords for the charge exchange recombination spectroscopy (CER) diagnostic have been installed. CER is a common method for measuring...