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D. J. Den Hartog
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Journal Articles

Upgrades to x-ray microcalorimeter fusion diagnostic to improve calibration, spectral bandwidth selection, and count rate adjustment

S. Z. Kubala, C. B. Beatty, P. Beiersdorfer, G. V. Brown, D. J. Den Hartog, M. E. Eckart, H. J. Flores-Alimboyoguen, N. Hell, R. L. Kelley, C. A. Kilbourne, M. A. Leutenegger, E. W. Magee, F. S. Porter, M. C. Witthoeft
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 95, 123516 (2024)
https://doi.org/10.1063/5.0219592
Published: December 2024
View article titled, Upgrades to x-ray microcalorimeter fusion diagnostic to improve calibration, spectral bandwidth selection, and count rate adjustment
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Journal Articles

Pedestal fluctuation measurements with charge exchange imaging at the DIII-D tokamak

M. R. Major, G. R. McKee, B. Geiger, D. J. Den Hartog, K. Jaehnig, C. Seyfert, D. R. Smith, S. D. Stewart, Z. Yan
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 93, 113503 (2022)
https://doi.org/10.1063/5.0101844
Published: November 2022
View article titled, Pedestal fluctuation measurements with charge exchange imaging at the DIII-D tokamak
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Journal Articles

Self-organized magnetic equilibria in tokamak plasmas with very low edge safety factor

Editor’s Pick
N. C. Hurst, B. E. Chapman, A. F. Almagri, B. S. Cornille, S. Z. Kubala, K. J. McCollam, J. S. Sarff, C. R. Sovinec, J. K. Anderson, D. J. Den Hartog, C. B. Forest, M. D. Pandya, W. S. Solsrud
Journal: Physics of Plasmas
Phys. Plasmas 29, 080704 (2022)
https://doi.org/10.1063/5.0101880
Published: August 2022
View article titled, Self-organized magnetic equilibria in tokamak plasmas with very low edge safety factor
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Journal Articles

Multi-energy reconstructions, central electron temperature measurements, and early detection of the birth and growth of runaway electrons using a versatile soft x-ray pinhole camera at MST

L. F. Delgado-Aparicio, P. VanMeter, T. Barbui, O. Chellai, J. Wallace, H. Yamazaki, S. Kojima, A. F. Almagari, N. C. Hurst, B. E. Chapman, K. J. McCollam, D. J. Den Hartog, J. S. Sarff, L. M. Reusch, N. Pablant, K. Hill, M. Bitter, M. Ono, B. Stratton, Y. Takase, B. Luethi, M. Rissi, T. Donath, P. Hofer, N. Pilet
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 073502 (2021)
https://doi.org/10.1063/5.0043672
Published: July 2021
View article titled, Multi-energy reconstructions, central electron temperature measurements, and early detection of the birth and growth of runaway electrons using a versatile soft x-ray pinhole camera at MST
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Journal Articles

Microcalorimeter measurement of x-ray spectra from a high-temperature magnetically confined plasma

M. E. Eckart, P. Beiersdorfer, G. V. Brown, D. J. Den Hartog, N. Hell, R. L. Kelley, C. A. Kilbourne, E. W. Magee, A.-E. Y. Mangoba, M. D. Nornberg, F. S. Porter, L. M. Reusch, J. P. Wallace
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 063520 (2021)
https://doi.org/10.1063/5.0043980
Published: June 2021
View article titled, Microcalorimeter measurement of x-ray spectra from a high-temperature magnetically confined plasma
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Journal Articles

Robust analysis of space-, time-, and energy-resolved soft x-ray measurements of magnetically confined fusion plasmas (invited)

P. D. VanMeter, L. F. Delgado-Aparicio, L. M. Reusch, D. J. Den Hartog
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 053549 (2021)
https://doi.org/10.1063/5.0043787
Published: May 2021
View article titled, Robust analysis of space-, time-, and energy-resolved soft x-ray measurements of magnetically confined fusion plasmas (invited)
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Includes: Supplementary data
Journal Articles

Intrinsic flow and tearing mode rotation in the RFP during improved confinement

FeaturedScilight
D. Craig, E. H. Tan, B. Schott, J. K. Anderson, J. Boguski, D. J. Den Hartog, T. Nishizawa, M. D. Nornberg, Z. A. Xing
Journal: Physics of Plasmas
Phys. Plasmas 26, 072503 (2019)
https://doi.org/10.1063/1.5095620
Published: July 2019
View article titled, Intrinsic flow and tearing mode rotation in the RFP during improved confinement
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Journal Articles

Using integrated data analysis to extend measurement capability (invited)

L. M. Reusch, M. D. Nornberg, J. A. Goetz, D. J. Den Hartog
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 89, 10K103 (2018)
https://doi.org/10.1063/1.5039349
Published: August 2018
View article titled, Using integrated data analysis to extend measurement capability (invited)
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Includes: Supplementary data
Journal Articles

Electron thermal confinement in a partially stochastic magnetic structure

Editor’s Pick
L. A. Morton, W. C. Young, C. C. Hegna, E. Parke, J. A. Reusch, D. J. Den Hartog
Journal: Physics of Plasmas
Phys. Plasmas 25, 042306 (2018)
https://doi.org/10.1063/1.5021893
Published: April 2018
View article titled, Electron thermal confinement in a partially stochastic magnetic structure
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Includes: Supplementary data
Journal Articles

Linearized spectrum correlation analysis for line emission measurements

T. Nishizawa, M. D. Nornberg, D. J. Den Hartog, J. S. Sarff
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 88, 083513 (2017)
https://doi.org/10.1063/1.4999450
Published: August 2017
View article titled, Linearized spectrum correlation analysis for line emission measurements
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Includes: Supplementary data
Journal Articles

Magnetic and velocity fluctuations from nonlinearly coupled tearing modes in the reversed field pinch with and without the reversal surface

D. Craig, D. Martin, D. J. Den Hartog, M. D. Nornberg, J. A. Reusch
Journal: Physics of Plasmas
Phys. Plasmas 24, 082308 (2017)
https://doi.org/10.1063/1.4996907
Published: August 2017
View article titled, Magnetic and velocity fluctuations from nonlinearly coupled tearing modes in the reversed field pinch with and without the reversal surface
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Journal Articles

Upgrades to improve the usability, reliability, and spectral range of the MST Thomson scattering diagnostic

S. Z. Kubala, M. T. Borchardt, D. J. Den Hartog, D. J. Holly, C. M. Jacobson, L. A. Morton, W. C. Young
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E547 (2016)
https://doi.org/10.1063/1.4962251
Published: September 2016
View article titled, Upgrades to improve the usability, reliability, and spectral range of the MST Thomson scattering diagnostic
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Includes: Supplementary data
Journal Articles

Spectroscopic determination of the composition of a 50 kV hydrogen diagnostic neutral beam

X. Feng, M. D. Nornberg, D. Craig, D. J. Den Hartog, S. P. Oliva
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E543 (2016)
https://doi.org/10.1063/1.4961269
Published: September 2016
View article titled, Spectroscopic determination of the composition of a 50 kV hydrogen diagnostic neutral beam
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Includes: Supplementary data
Journal Articles

Calibration of a two-color soft x-ray diagnostic for electron temperature measurement

L. M. Reusch, D. J. Den Hartog, P. Franz, J. Goetz, M. B. McGarry, H. D. Stephens
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E332 (2016)
https://doi.org/10.1063/1.4961281
Published: August 2016
View article titled, Calibration of a two-color soft x-ray diagnostic for electron temperature measurement
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Includes: Supplementary data
Journal Articles

Upgrading a high-throughput spectrometer for high-frequency (<400 kHz) measurements

T. Nishizawa, M. D. Nornberg, D. J. Den Hartog, D. Craig
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E530 (2016)
https://doi.org/10.1063/1.4960073
Published: August 2016
View article titled, Upgrading a high-throughput spectrometer for high-frequency (&lt;400 kHz) measurements
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Includes: Supplementary data
Journal Articles

A comparison between soft x-ray and magnetic phase data on the Madison symmetric torus

P. D. VanMeter, P. Franz, L. M. Reusch, J. S. Sarff, D. J. Den Hartog
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E322 (2016)
https://doi.org/10.1063/1.4960492
Published: August 2016
View article titled, A comparison between soft x-ray and magnetic phase data on the Madison symmetric torus
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Journal Articles

Identification and mitigation of stray laser light in the Thomson scattering system on the Madison Symmetric Torus (MST)

C. M. Jacobson, M. T. Borchardt, D. J. Den Hartog, A. F. Falkowski, L. A. Morton, M. A. Thomas
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E511 (2016)
https://doi.org/10.1063/1.4960063
Published: August 2016
View article titled, Identification and mitigation of stray laser light in the Thomson scattering system on the Madison Symmetric Torus (MST)
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Includes: Supplementary data
Journal Articles

Absolute wavelength calibration of a Doppler spectrometer with a custom Fabry-Perot optical system

M. M. Baltzer, D. Craig, D. J. Den Hartog, T. Nishizawa, M. D. Nornberg
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E509 (2016)
https://doi.org/10.1063/1.4955491
Published: July 2016
View article titled, Absolute wavelength calibration of a Doppler spectrometer with a custom Fabry-Perot optical system
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Journal Articles

Exact relativistic expressions for polarization of incoherent Thomson scattering

V. V. Mirnov, D. J. Den Hartog, E. Parke
Journal: Physics of Plasmas
Phys. Plasmas 23, 052108 (2016)
https://doi.org/10.1063/1.4948488
Published: May 2016
View article titled, Exact relativistic expressions for polarization of incoherent Thomson scattering
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Journal Articles

Current profile redistribution driven by neutral beam injection in a reversed-field pinch

E. Parke, J. K. Anderson, D. L. Brower, D. J. Den Hartog, W. X. Ding, C. A. Johnson, L. Lin
Journal: Physics of Plasmas
Phys. Plasmas 23, 056108 (2016)
https://doi.org/10.1063/1.4946019
Published: April 2016
View article titled, Current profile redistribution driven by neutral beam injection in a reversed-field pinch
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Includes: Supplementary data