Magnetothermodynamics: measurements of the thermodynamic properties in a relaxed magnetohydrodynamic plasma
Abstract
We have investigated the thermodynamics of compressed magnetized plasmas in laboratory experiments and we call these studies ‘magnetothermodynamics’. The experiments are carried out in the Swarthmore Spheromak eXperiment device. Here, a magnetized plasma source is located at one end and at the other end, a closed conducting can is installed. We generate parcels of magnetized plasma and observe their compression against the end wall of the conducting cylinder. The plasma parameters such as plasma density, temperature and magnetic field are measured during compression using HeNe laser interferometry, ion Doppler spectroscopy and a linear$${\dot{B}}$$probe array, respectively. To identify the instances of ion heating during compression, a PV diagram is constructed using measured density, temperature and a proxy for the volume of the magnetized plasma. Different equations of state are analysed to evaluate the adiabatic nature of the compressed plasma. A three-dimensional resistive magnetohydrodynamic code (NIMROD) is employed to simulate the twisted Taylor states and shows stagnation against the end wall of the closed conducting can. The simulation findings are consistent to what we observe in our experiments.
- Authors:
-
- Swarthmore College, PA (United States)
- Bryn Mawr College, PA (United States)
- Woodruff Scientific Inc., Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Science (SC)
- OSTI Identifier:
- 1544324
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Plasma Physics
- Additional Journal Information:
- Journal Volume: 84; Journal Issue: 1; Journal ID: ISSN 0022-3778
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Kaur, M., Barbano, L. J., Suen-Lewis, E. M., Shrock, J. E., Light, A. D., Schaffner, D. A., Brown, M. B., Woodruff, S., and Meyer, T. Magnetothermodynamics: measurements of the thermodynamic properties in a relaxed magnetohydrodynamic plasma. United States: N. p., 2018.
Web. doi:10.1017/S0022377818000156.
Kaur, M., Barbano, L. J., Suen-Lewis, E. M., Shrock, J. E., Light, A. D., Schaffner, D. A., Brown, M. B., Woodruff, S., & Meyer, T. Magnetothermodynamics: measurements of the thermodynamic properties in a relaxed magnetohydrodynamic plasma. United States. https://doi.org/10.1017/S0022377818000156
Kaur, M., Barbano, L. J., Suen-Lewis, E. M., Shrock, J. E., Light, A. D., Schaffner, D. A., Brown, M. B., Woodruff, S., and Meyer, T. Mon .
"Magnetothermodynamics: measurements of the thermodynamic properties in a relaxed magnetohydrodynamic plasma". United States. https://doi.org/10.1017/S0022377818000156. https://www.osti.gov/servlets/purl/1544324.
@article{osti_1544324,
title = {Magnetothermodynamics: measurements of the thermodynamic properties in a relaxed magnetohydrodynamic plasma},
author = {Kaur, M. and Barbano, L. J. and Suen-Lewis, E. M. and Shrock, J. E. and Light, A. D. and Schaffner, D. A. and Brown, M. B. and Woodruff, S. and Meyer, T.},
abstractNote = {We have investigated the thermodynamics of compressed magnetized plasmas in laboratory experiments and we call these studies ‘magnetothermodynamics’. The experiments are carried out in the Swarthmore Spheromak eXperiment device. Here, a magnetized plasma source is located at one end and at the other end, a closed conducting can is installed. We generate parcels of magnetized plasma and observe their compression against the end wall of the conducting cylinder. The plasma parameters such as plasma density, temperature and magnetic field are measured during compression using HeNe laser interferometry, ion Doppler spectroscopy and a linear${\dot{B}}$probe array, respectively. To identify the instances of ion heating during compression, a PV diagram is constructed using measured density, temperature and a proxy for the volume of the magnetized plasma. Different equations of state are analysed to evaluate the adiabatic nature of the compressed plasma. A three-dimensional resistive magnetohydrodynamic code (NIMROD) is employed to simulate the twisted Taylor states and shows stagnation against the end wall of the closed conducting can. The simulation findings are consistent to what we observe in our experiments.},
doi = {10.1017/S0022377818000156},
journal = {Journal of Plasma Physics},
number = 1,
volume = 84,
place = {United States},
year = {Mon Feb 19 00:00:00 EST 2018},
month = {Mon Feb 19 00:00:00 EST 2018}
}
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