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J. B. O. Caughman
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Journal Articles

RF sheath induced sputtering on Proto-MPEX part 2: Impurity transport modeling and experimental comparison

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C. J. Beers, C. Lau, J. Rapp, T. R. Younkin, T. M. Biewer, T. Bigelow, J. F. Caneses, J. B. O. Caughman, D. L. Green, H. Meyer, III, J. R. Myra, S. J. Zinkle
Journal: Physics of Plasmas
Phys. Plasmas 28, 103508 (2021)
https://doi.org/10.1063/5.0065464
Published: October 2021
View articletitled, RF sheath induced sputtering on Proto-MPEX part 2: Impurity transport modeling and experimental comparison
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Journal Articles

Development of the materials analysis and particle probe for Proto-MPEX

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C. J. Beers, C. Jaramillo, N. C. Reid, H. Schamis, J. P. Allain, J. B. O. Caughman, S. J. Meitner, J. Rapp, S. J. Zinkle
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 045108 (2021)
https://doi.org/10.1063/5.0043111
Published: April 2021
View articletitled, Development of the materials analysis and particle probe for Proto-MPEX
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Journal Articles

Utilization of O-X-B mode conversion of 28 GHz microwaves to heat core electrons in the upgraded Proto-MPEX

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T. M. Biewer, C. Lau, T. S. Bigelow, J. F. Caneses, J. B. O. Caughman, R. H. Goulding, N. Kafle, M. C. Kaufman, J. Rapp, Proto-MPEX Team
Journal: Physics of Plasmas
Phys. Plasmas 26, 053508 (2019)
https://doi.org/10.1063/1.5093321
Published: May 2019
View articletitled, Utilization of O-X-B mode conversion of 28 GHz microwaves to heat core electrons in the upgraded Proto-MPEX
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Journal Articles

Computational investigation of ion cyclotron heating on Proto-MPEX

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P. A. Piotrowicz, R. H. Goulding, J. F. Caneses, D. L. Green, J. B. O. Caughman, C. Lau, J. Rapp, D. N. Ruzic
Journal: Physics of Plasmas
Phys. Plasmas 26, 033511 (2019)
https://doi.org/10.1063/1.5065784
Published: March 2019
View articletitled, Computational investigation of ion cyclotron heating on Proto-MPEX
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Journal Articles

Evidence of electron heating at different radial locations on Proto-MPEX

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C. Lau, J. F. Caneses, T. S. Bigelow, T. M. Biewer, J. B. O. Caughman, R. H. Goulding, P. A. Piotrowicz, J. Rapp, H. B. Ray, M. Showers
Journal: Physics of Plasmas
Phys. Plasmas 26, 032503 (2019)
https://doi.org/10.1063/1.5083814
Published: March 2019
View articletitled, Evidence of electron heating at different radial locations on Proto-MPEX
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Journal Articles

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX

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J. F. Caneses, P. A. Piotrowicz, T. M. Biewer, J. B. O. Caughman, R. H. Goulding, N. Kafle, J. Rapp
Journal: Physics of Plasmas
Phys. Plasmas 25, 083518 (2018)
https://doi.org/10.1063/1.5001519
Published: August 2018
View articletitled, Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX
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Journal Articles

Plasma flow measurements in the Prototype-Material Plasma Exposure eXperiment (Proto-MPEX) and comparison with B2.5-Eirene modeling

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N. Kafle, L. W. Owen, J. F. Caneses, T. M. Biewer, J. B. O. Caughman, D. C. Donovan, R. H. Goulding, J. Rapp
Journal: Physics of Plasmas
Phys. Plasmas 25, 052508 (2018)
https://doi.org/10.1063/1.5019266
Published: May 2018
View articletitled, Plasma flow measurements in the Prototype-Material Plasma Exposure eXperiment (Proto-MPEX) and comparison with B2.5-Eirene modeling
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Journal Articles

Direct measurement of the transition from edge to core power coupling in a light-ion helicon source

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P. A. Piotrowicz, J. F. Caneses, M. A. Showers, D. L. Green, R. H. Goulding, J. B. O. Caughman, T. M. Biewer, J. Rapp, D. N. Ruzic
Journal: Physics of Plasmas
Phys. Plasmas 25, 052101 (2018)
https://doi.org/10.1063/1.5023924
Published: May 2018
View articletitled, Direct measurement of the transition from edge to core power coupling in a light-ion helicon source
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Journal Articles

Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX

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C. J. Beers, R. H. Goulding, R. C. Isler, E. H. Martin, T. M. Biewer, J. F. Caneses, J. B. O. Caughman, N. Kafle, J. Rapp
Journal: Physics of Plasmas
Phys. Plasmas 25, 013526 (2018)
https://doi.org/10.1063/1.4994541
Published: January 2018
View articletitled, Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX
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Journal Articles

Applications of Doppler-free saturation spectroscopy for edge physics studies (invited)

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E. H. Martin, A. Zafar, J. B. O. Caughman, R. C. Isler, G. L. Bell
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E402 (2016)
https://doi.org/10.1063/1.4961287
Published: August 2016
View articletitled, Applications of Doppler-free saturation spectroscopy for edge physics studies (invited)
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Journal Articles

Heat flux estimates of power balance on Proto-MPEX with IR imaging

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M. Showers, T. M. Biewer, J. B. O. Caughman, D. C. Donovan, R. H. Goulding, J. Rapp
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11D412 (2016)
https://doi.org/10.1063/1.4959953
Published: August 2016
View articletitled, Heat flux estimates of power balance on Proto-MPEX with IR imaging
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Journal Articles

A temporally and spatially resolved electron density diagnostic method for the edge plasma based on Stark broadening

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A. Zafar, E. H. Martin, S. C. Shannon, R. C. Isler, J. B. O. Caughman
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E505 (2016)
https://doi.org/10.1063/1.4955484
Published: July 2016
View articletitled, A temporally and spatially resolved electron density diagnostic method for the edge plasma based on Stark broadening
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Journal Articles

Electric field measurements of the LH wave and ICRF near-field utilizing non-perturbative spectroscopic techniques

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E. H. Martin, J. B. O. Caughman, C. C. Klepper, M. Goniche, R. C. Isler, J. Hillairet, C. Bottereau
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1689, 030011 (2015)
https://doi.org/10.1063/1.4936476
Published: December 2015
View articletitled, Electric field measurements of the LH wave and ICRF near-field utilizing non-perturbative spectroscopic techniques
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Journal Articles

Operation of the ORNL High Particle Flux Helicon Plasma Source

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R. H. Goulding, T. M. Biewer, J. B. O. Caughman, G. C. Chen, L. W. Owen, D. O. Sparks
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1406, 535–538 (2011)
https://doi.org/10.1063/1.3665029
Published: December 2011
View articletitled, Operation of the ORNL High Particle Flux Helicon Plasma Source
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Journal Articles

Design Concepts For A Long Pulse Upgrade For The DIII‐D Fast Wave Antenna Array

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P. M. Ryan, F. W. Baity, J. B. O. Caughman, R. H. Goulding, J. C. Hosea, N. L. Greenough, A. Nagy, R. I. Pinsker, D. A. Rasmussen
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1187, 305–308 (2009)
https://doi.org/10.1063/1.3273754
Published: November 2009
View articletitled, Design Concepts For A Long Pulse Upgrade For The DIII‐D Fast Wave Antenna Array
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Journal Articles

Design of a high particle flux hydrogen helicon plasma source for used in plasma materials interaction studies

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R. H. Goulding, G. Chen, S. Meitner, F. W. Baity, J. B. O. Caughman, L. Owen
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1187, 667–670 (2009)
https://doi.org/10.1063/1.3273839
Published: November 2009
View articletitled, Design of a high particle flux hydrogen helicon plasma source for used in plasma materials interaction studies
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Journal Articles

Characterization of Electron Bernstein Wave Emission from the TJ‐II Stellarator

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J. B. O. Caughman, Á. Cappa, J. M. Garcia‐Regaña, F. Castejón, A. Fernández, D. A. Rasmussen, J. B. Wilgen
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1187, 461–464 (2009)
https://doi.org/10.1063/1.3273792
Published: November 2009
View articletitled, Characterization of Electron Bernstein Wave Emission from the TJ‐II Stellarator
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Journal Articles

A compact flexible pellet injector for the TJ-II stellarator

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K. J. McCarthy, S. K. Combs, L. R. Baylor, J. B. O. Caughman, D. T. Fehling, C. R. Foust, J. M. McGill, J. M. Carmona, D. A. Rasmussen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 79, 10F321 (2008)
https://doi.org/10.1063/1.2955706
Published: October 2008
View articletitled, A compact flexible pellet injector for the TJ-II stellarator
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Journal Articles

Study of RF Breakdown Mechanisms Relevant to an ICH Antenna Environment

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J. B. O. Caughman, C. Castano‐Giraldo, M. Aghazarian, F. W. Baity, D. A. Rasmussen, D. N. Ruzic
Journal: AIP Conference Proceedings
AIP Conf. Proc. 933, 195–202 (2007)
https://doi.org/10.1063/1.2800475
Published: September 2007
View articletitled, Study of RF Breakdown Mechanisms Relevant to an ICH Antenna Environment
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Journal Articles

Technique for measuring D 2 pellet mass loss through a curved guide tube using two microwave cavity detectors

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S. K. Combs, J. B. O. Caughman, J. B. Wilgen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 77, 073503 (2006)
https://doi.org/10.1063/1.2219748
Published: July 2006
View articletitled, Technique for measuring D 2 pellet mass loss through a curved guide tube using two microwave cavity detectors
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