G J Kramer
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Explore the profile of G J Kramer including associated specialties, affiliations and a list of published articles.
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40
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91
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Recent Articles
1.
Yu G, Zhu Y, Wang Y, Meneghini O, Smith S, Zou Y, et al.
Rev Sci Instrum
. 2021 Apr;
92(3):033540.
PMID: 33820069
An Electron Cyclotron Emission Imaging (ECEI) data analysis module has been developed for the OMFIT platform to accommodate the needs of users at the DIII-D tokamak for physics applications. The...
2.
Muscatello C, Anderson J, Boivin R, Finkenthal D, Gattuso A, Kramer G, et al.
Rev Sci Instrum
. 2021 Apr;
92(3):033524.
PMID: 33820017
Final design studies in preparation for manufacturing have been performed for functional components of the vacuum portion of the ITER Low-Field Side Reflectometer (LFSR). These components consist of an antenna...
3.
Scelsi C, Rahim T, Morris J, Kramer G, Gilbert B, Forseen S
AJNR Am J Neuroradiol
. 2020 Feb;
41(4):566-572.
PMID: 32079598
The cerebral ventricles have been studied since the fourth century BC and were originally thought to harbor the soul and higher executive functions. During the infancy of neuroradiology, alterations to...
4.
Diallo A, Dominski J, Barada K, Knolker M, Kramer G, McKee G
Phys Rev Lett
. 2018 Dec;
121(23):235001.
PMID: 30576208
Prior to eruptive events such as edge localized modes (ELMs), quasicoherent fluctuations, referred to as pedestal modes, are observed in the edge of fusion devices. We report on the investigations...
5.
Shi L, Valeo E, Tobias B, Kramer G, Hausammann L, Tang W, et al.
Rev Sci Instrum
. 2016 Dec;
87(11):11D303.
PMID: 27910444
A Synthetic Diagnostics Platform (SDP) for fusion plasmas has been developed which provides state of the art synthetic reflectometry, beam emission spectroscopy, and Electron Cyclotron Emission (ECE) diagnostics. Interfaces to...
6.
Collins C, Heidbrink W, Austin M, Kramer G, Pace D, Petty C, et al.
Phys Rev Lett
. 2016 Mar;
116(9):095001.
PMID: 26991180
Experiments in the DIII-D tokamak show that fast-ion transport suddenly becomes stiff above a critical threshold in the presence of many overlapping small-amplitude Alfvén eigenmodes (AEs). The threshold is phase-space...
7.
Chen X, Heidbrink W, Van Zeeland M, Kramer G, Pace D, Petty C, et al.
Rev Sci Instrum
. 2014 Nov;
85(11):11E701.
PMID: 25430364
By arranging the particle first banana orbits to pass near a distant detector, the light ion beam probe (LIBP) utilizes orbital deflection to probe internal fields and field fluctuations. The...
8.
Liu J, Milbourne T, Bitter M, Delgado-Aparicio L, Dominguez A, Efthimion P, et al.
Rev Sci Instrum
. 2014 Nov;
85(11):11D802.
PMID: 25430215
The implementation of advanced electron cyclotron emission imaging (ECEI) systems on tokamak experiments has revolutionized the diagnosis of magnetohydrodynamic (MHD) activities and improved our understanding of instabilities, which lead to...
9.
Muscatello C, Domier C, Hu X, Kramer G, Luhmann Jr N, Ren X, et al.
Rev Sci Instrum
. 2014 Nov;
85(11):11D702.
PMID: 25430212
The two-dimensional mm-wave imaging reflectometer (MIR) on DIII-D is a multi-faceted device for diagnosing electron density fluctuations in fusion plasmas. Its multi-channel, multi-frequency capabilities and high sensitivity permit visualization and...
10.
Bortolon A, Heidbrink W, Kramer G, Park J, Fredrickson E, Lore J, et al.
Phys Rev Lett
. 2013 Jul;
110(26):265008.
PMID: 23848889
The application of static magnetic field perturbations to a tokamak plasma is observed to alter the dynamics of high-frequency bursting Alfvén modes that are driven unstable by energetic ions. In...