Collisional damping of helicon waves in a high density hydrogen linear plasma device

Caneses, Juan F.; Blackwell, Boyd D.

doi:10.1088/0963-0252/25/5/055027

Title: Collisional damping of helicon waves in a high density hydrogen linear plasma device

Abstract

In this paper, we investigate the propagation and damping of helicon waves along the length (~50 cm) of a helicon-produced 20 kW hydrogen plasma ( ~1-2 1019 m-3, ~1-6 eV, H2 8 mTorr) operated in a magnetic mirror configuration (antenna region: 50-200 G and mirror region: 800 G). Experimental results show the presence of traveling helicon waves (~10 G and ~ 10-15 cm) propagating away from the antenna region which become collisionally absorbed within 40 to 50 cm. We describe the use of the WKB method to calculate wave damping and provide an expression to assess its validity based on experimental measurements. By comparing theory and experiment, we show that for the conditions associated with this paper classical collisions are sufficient to explain the observed wave damping along the length of the plasma column. Based on these results, we provide an expression for the scaling of helicon wave damping relevant to high density discharges and discuss the location of surfaces for plasma-material interaction studies in our device (MAGPIE).

Authors:

Caneses, Juan F. ^[1]; Blackwell, Boyd D. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Research School of Physics and Engineering ANU, Canberra (Australia)

Publication Date:: Wed Sep 28 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1347309

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Plasma Sources Science and Technology

Additional Journal Information:: Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 0963-0252

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Caneses, Juan F., and Blackwell, Boyd D. Collisional damping of helicon waves in a high density hydrogen linear plasma device.  United States: N. p., 2016. 
Web.  doi:10.1088/0963-0252/25/5/055027.

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                    Caneses, Juan F., & Blackwell, Boyd D. Collisional damping of helicon waves in a high density hydrogen linear plasma device.  United States.  https://doi.org/10.1088/0963-0252/25/5/055027

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                    Caneses, Juan F., and Blackwell, Boyd D. Wed .  
"Collisional damping of helicon waves in a high density hydrogen linear plasma device".  United States.  https://doi.org/10.1088/0963-0252/25/5/055027.  https://www.osti.gov/servlets/purl/1347309.

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@article{osti_1347309,

  title        = {Collisional damping of helicon waves in a high density hydrogen linear plasma device},

  author       = {Caneses, Juan F. and Blackwell, Boyd D.},

  abstractNote = {In this paper, we investigate the propagation and damping of helicon waves along the length (~50 cm) of a helicon-produced 20 kW hydrogen plasma ( ~1-2 1019 m-3, ~1-6 eV, H2 8 mTorr) operated in a magnetic mirror configuration (antenna region: 50-200 G and mirror region: 800 G). Experimental results show the presence of traveling helicon waves (~10 G and ~ 10-15 cm) propagating away from the antenna region which become collisionally absorbed within 40 to 50 cm. We describe the use of the WKB method to calculate wave damping and provide an expression to assess its validity based on experimental measurements. By comparing theory and experiment, we show that for the conditions associated with this paper classical collisions are sufficient to explain the observed wave damping along the length of the plasma column. Based on these results, we provide an expression for the scaling of helicon wave damping relevant to high density discharges and discuss the location of surfaces for plasma-material interaction studies in our device (MAGPIE).},

  doi          = {10.1088/0963-0252/25/5/055027},

  journal      = {Plasma Sources Science and Technology},

  number       = 5,

  volume       = 25,

  place        = {United States},

  year         = {Wed Sep 28 00:00:00 EDT 2016},

  month        = {Wed Sep 28 00:00:00 EDT 2016}

}

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https://doi.org/10.1088/0963-0252/25/5/055027

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Cited by: 21 works

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Works referenced in this record:

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Works referencing / citing this record:

Broad ion energy distributions in helicon wave-coupled helium plasma
journal, May 2017

Woller, K. B.; Whyte, D. G.; Wright, G. M.
Physics of Plasmas, Vol. 24, Issue 5
DOI: 10.1063/1.4983315

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX
journal, August 2018

Caneses, J. F.; Piotrowicz, P. A.; Biewer, T. M.
Physics of Plasmas, Vol. 25, Issue 8
DOI: 10.1063/1.5001519

Direct measurement of the transition from edge to core power coupling in a light-ion helicon source
journal, May 2018

Piotrowicz, P. A.; Caneses, J. F.; Showers, M. A.
Physics of Plasmas, Vol. 25, Issue 5
DOI: 10.1063/1.5023924

Helicon normal modes in Proto-MPEX
journal, May 2018

Piotrowicz, P. A.; Caneses, J. F.; Green, D. L.
Plasma Sources Science and Technology, Vol. 27, Issue 5
DOI: 10.1088/1361-6595/aabd62

High density negative hydrogen ion production in a high power pulsed helicon discharge
journal, October 2018

Santoso, Jesse; Willett, Hannah V.; Corr, Cormac S.
Plasma Sources Science and Technology, Vol. 27, Issue 10
DOI: 10.1088/1361-6595/aae705

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Title: Collisional damping of helicon waves in a high density hydrogen linear plasma device

Abstract

Citation Formats

ITER: burning plasma physics experiment journal, March 2003

IFMIF – An international fusion materials irradiation facility journal, April 1998

Plasma surface interaction experimental facility (PISCES) for materials and edge physics studies journal, May 1984

Contribution of molecular activated recombination to hydrogen plasma detachment in the divertor plasma simulator NAGDIS-II journal, March 1999

Pre-design of Magnum-PSI: A new plasma–wall interaction experiment journal, October 2007

High heat flux capabilities of the Magnum-PSI linear plasma device journal, October 2013

Design and characterization of the Magnetized Plasma Interaction Experiment (MAGPIE): a new source for plasma–material interaction studies journal, October 2012

Transport simulations of linear plasma generators with the B2.5-Eirene and EMC3-Eirene codes journal, August 2015

Comparing experiments with modeling for light ion helicon plasma sources journal, December 2002

High density hydrogen helicon plasma in a non-uniform magnetic field journal, June 2004

A 1D cylindrical kinetic wave code for helicon plasma sources journal, September 1998

Self-consistent discharge characteristics of collisional helicon plasmas journal, March 2003

Resonant power absorption in helicon plasma sources journal, December 2006

Measurements and modeling of radio frequency field structures in a helicon plasma journal, January 2011

Plasma ionization by helicon waves journal, April 1991

Helicon waves and efficient plasma production journal, April 1991

Plasma production from helicon waves journal, July 1996

Modeling ionization by helicon waves journal, July 1997

Wave propagation downstream of a high power helicon in a dipolelike magnetic field journal, January 2010

Plasma control by modification of helicon wave propagation in low magnetic fields journal, July 2010

Ion-sound parametric turbulence and anomalous electron heating with application to helicon plasma sources journal, August 1998

Parametric decay instabilities in the HELIX helicon plasma source journal, January 2003

Parametric ion-acoustic turbulence in a helicon discharge journal, April 2003

Excitation of short-scale fluctuations by parametric decay of helicon waves into ion–sound and Trivelpiece–Gould waves journal, August 2005

Dependence of Helicon Wave Radial Structure on Electron Inertia journal, January 1972

Effect of boundary conditions on radial mode structure of whistlers journal, April 1984

Power coupling to helicon and Trivelpiece–Gould modes in helicon sources journal, March 1998

Transitions from electrostatic to electromagnetic whistler wave excitation journal, May 2004

Generalized theory of helicon waves. I. Normal modes journal, September 1997

Density enhancement near lower hybrid resonance layer in m=0 helicon wave plasmas journal, January 2001

Slow wave ion heating in the HELIX helicon source journal, September 2002

Neutral depletion and the helicon density limit journal, December 2013

Discharge equilibrium of a helicon plasma journal, February 1996

Improved analysis techniques for cylindrical and spherical double probes journal, July 2012

Dynamics of neutral gas depletion investigated by time- and space-resolved measurements of xenon atom ground state density journal, May 2012

Rotational Excitation and Momentum Transfer Cross Sections for Electrons in H 2 and N 2 from Transport Coefficients journal, September 1962

Wave modeling in a cylindrical non-uniform helicon discharge journal, August 2012

Axial propagation of helicon waves journal, November 1995

Two photon absorption laser induced fluorescence measurements of neutral density in a helicon plasma journal, May 2014

RF compensation of double Langmuir probes: modelling and experiment journal, May 2015

Langmuir probe analysis for high density plasmas journal, June 2001

Low-pressure hydrogen plasmas explored using a global model journal, December 2015

Broad ion energy distributions in helicon wave-coupled helium plasma journal, May 2017

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX journal, August 2018

Direct measurement of the transition from edge to core power coupling in a light-ion helicon source journal, May 2018

Helicon normal modes in Proto-MPEX journal, May 2018

High density negative hydrogen ion production in a high power pulsed helicon discharge journal, October 2018

ITER: burning plasma physics experiment
journal, March 2003

IFMIF – An international fusion materials irradiation facility
journal, April 1998

Plasma surface interaction experimental facility (PISCES) for materials and edge physics studies
journal, May 1984

Contribution of molecular activated recombination to hydrogen plasma detachment in the divertor plasma simulator NAGDIS-II
journal, March 1999

Pre-design of Magnum-PSI: A new plasma–wall interaction experiment
journal, October 2007

High heat flux capabilities of the Magnum-PSI linear plasma device
journal, October 2013

Design and characterization of the Magnetized Plasma Interaction Experiment (MAGPIE): a new source for plasma–material interaction studies
journal, October 2012

Transport simulations of linear plasma generators with the B2.5-Eirene and EMC3-Eirene codes
journal, August 2015

Comparing experiments with modeling for light ion helicon plasma sources
journal, December 2002

High density hydrogen helicon plasma in a non-uniform magnetic field
journal, June 2004

A 1D cylindrical kinetic wave code for helicon plasma sources
journal, September 1998

Self-consistent discharge characteristics of collisional helicon plasmas
journal, March 2003

Resonant power absorption in helicon plasma sources
journal, December 2006

Measurements and modeling of radio frequency field structures in a helicon plasma
journal, January 2011

Plasma ionization by helicon waves
journal, April 1991

Helicon waves and efficient plasma production
journal, April 1991

Plasma production from helicon waves
journal, July 1996

Modeling ionization by helicon waves
journal, July 1997

Wave propagation downstream of a high power helicon in a dipolelike magnetic field
journal, January 2010

Plasma control by modification of helicon wave propagation in low magnetic fields
journal, July 2010

Ion-sound parametric turbulence and anomalous electron heating with application to helicon plasma sources
journal, August 1998

Parametric decay instabilities in the HELIX helicon plasma source
journal, January 2003

Parametric ion-acoustic turbulence in a helicon discharge
journal, April 2003

Excitation of short-scale fluctuations by parametric decay of helicon waves into ion–sound and Trivelpiece–Gould waves
journal, August 2005

Dependence of Helicon Wave Radial Structure on Electron Inertia
journal, January 1972

Effect of boundary conditions on radial mode structure of whistlers
journal, April 1984

Power coupling to helicon and Trivelpiece–Gould modes in helicon sources
journal, March 1998

Transitions from electrostatic to electromagnetic whistler wave excitation
journal, May 2004

Generalized theory of helicon waves. I. Normal modes
journal, September 1997

Density enhancement near lower hybrid resonance layer in m=0 helicon wave plasmas
journal, January 2001

Slow wave ion heating in the HELIX helicon source
journal, September 2002

Neutral depletion and the helicon density limit
journal, December 2013

Discharge equilibrium of a helicon plasma
journal, February 1996

Improved analysis techniques for cylindrical and spherical double probes
journal, July 2012

Dynamics of neutral gas depletion investigated by time- and space-resolved measurements of xenon atom ground state density
journal, May 2012

Rotational Excitation and Momentum Transfer Cross Sections for Electrons in $H_{2}$ and $N_{2}$ from Transport Coefficients
journal, September 1962

Wave modeling in a cylindrical non-uniform helicon discharge
journal, August 2012

Axial propagation of helicon waves
journal, November 1995

Two photon absorption laser induced fluorescence measurements of neutral density in a helicon plasma
journal, May 2014

RF compensation of double Langmuir probes: modelling and experiment
journal, May 2015

Langmuir probe analysis for high density plasmas
journal, June 2001

Low-pressure hydrogen plasmas explored using a global model
journal, December 2015

Broad ion energy distributions in helicon wave-coupled helium plasma
journal, May 2017

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX
journal, August 2018

Direct measurement of the transition from edge to core power coupling in a light-ion helicon source
journal, May 2018

Helicon normal modes in Proto-MPEX
journal, May 2018

High density negative hydrogen ion production in a high power pulsed helicon discharge
journal, October 2018