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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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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)

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, 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

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 article titled, Operation of the ORNL High Particle Flux Helicon Plasma Source
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Journal Articles

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

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 article titled, 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

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 article titled, Characterization of Electron Bernstein Wave Emission from the TJ‐II Stellarator
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Journal Articles

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

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 article titled, Design Concepts For A Long Pulse Upgrade For The DIII‐D Fast Wave Antenna Array
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Journal Articles

A compact flexible pellet injector for the TJ-II stellarator

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 article titled, 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

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 article titled, 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

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