Temperature measurements on RFP and ULQ experiments in REPUTE-1

Y. Nagayama, A. Ejiri, akihide fujisawa, T. Fujita, J. Matsui, K. Miyamoto, K. Saito, Y. Shimazu, K. Shimoji, K. Yamagishi

Research output: Contribution to conferencePaper

Abstract

The impurity ion, proton, and electron temperatures on a reversed field pinch (RFP) and an ultra-low-q (ULQ) plasma in the REPUTE-1 torus device have been measured. Typical examples of ion and the electron temperatures in the RFP plasma are shown. The experimental results are the following: (1) The electron temperature is lower than the proton temperature. (2) The impurity ion temperature is higher than the proton temperature in the low-density RFP plasma. (3) During the q-value transition phase in the ULQ, the impurity temperature becomes quite high, but the proton temperature is unchanged. The results are not expected from the classical Ohmic heating theory. Relaxation and MHD instability are candidates to explain the results.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 1989
Externally publishedYes
EventIEEE International Conference on Plasma Science 1989 - Buffalo, NY, USA
Duration: May 22 1989May 24 1989

Other

OtherIEEE International Conference on Plasma Science 1989
CityBuffalo, NY, USA
Period5/22/895/24/89

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Temperature measurement
Electron temperature
Protons
Impurities
Plasmas
Experiments
Ions
Temperature
Joule heating
Magnetohydrodynamics

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Nagayama, Y., Ejiri, A., fujisawa, A., Fujita, T., Matsui, J., Miyamoto, K., ... Yamagishi, K. (1989). Temperature measurements on RFP and ULQ experiments in REPUTE-1. Paper presented at IEEE International Conference on Plasma Science 1989, Buffalo, NY, USA, .

Temperature measurements on RFP and ULQ experiments in REPUTE-1. / Nagayama, Y.; Ejiri, A.; fujisawa, akihide; Fujita, T.; Matsui, J.; Miyamoto, K.; Saito, K.; Shimazu, Y.; Shimoji, K.; Yamagishi, K.

1989. Paper presented at IEEE International Conference on Plasma Science 1989, Buffalo, NY, USA, .

Research output: Contribution to conferencePaper

Nagayama, Y, Ejiri, A, fujisawa, A, Fujita, T, Matsui, J, Miyamoto, K, Saito, K, Shimazu, Y, Shimoji, K & Yamagishi, K 1989, 'Temperature measurements on RFP and ULQ experiments in REPUTE-1', Paper presented at IEEE International Conference on Plasma Science 1989, Buffalo, NY, USA, 5/22/89 - 5/24/89.
Nagayama Y, Ejiri A, fujisawa A, Fujita T, Matsui J, Miyamoto K et al. Temperature measurements on RFP and ULQ experiments in REPUTE-1. 1989. Paper presented at IEEE International Conference on Plasma Science 1989, Buffalo, NY, USA, .
Nagayama, Y. ; Ejiri, A. ; fujisawa, akihide ; Fujita, T. ; Matsui, J. ; Miyamoto, K. ; Saito, K. ; Shimazu, Y. ; Shimoji, K. ; Yamagishi, K. / Temperature measurements on RFP and ULQ experiments in REPUTE-1. Paper presented at IEEE International Conference on Plasma Science 1989, Buffalo, NY, USA, .1 p.
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abstract = "The impurity ion, proton, and electron temperatures on a reversed field pinch (RFP) and an ultra-low-q (ULQ) plasma in the REPUTE-1 torus device have been measured. Typical examples of ion and the electron temperatures in the RFP plasma are shown. The experimental results are the following: (1) The electron temperature is lower than the proton temperature. (2) The impurity ion temperature is higher than the proton temperature in the low-density RFP plasma. (3) During the q-value transition phase in the ULQ, the impurity temperature becomes quite high, but the proton temperature is unchanged. The results are not expected from the classical Ohmic heating theory. Relaxation and MHD instability are candidates to explain the results.",
author = "Y. Nagayama and A. Ejiri and akihide fujisawa and T. Fujita and J. Matsui and K. Miyamoto and K. Saito and Y. Shimazu and K. Shimoji and K. Yamagishi",
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AU - Nagayama, Y.

AU - Ejiri, A.

AU - fujisawa, akihide

AU - Fujita, T.

AU - Matsui, J.

AU - Miyamoto, K.

AU - Saito, K.

AU - Shimazu, Y.

AU - Shimoji, K.

AU - Yamagishi, K.

PY - 1989/12/1

Y1 - 1989/12/1

N2 - The impurity ion, proton, and electron temperatures on a reversed field pinch (RFP) and an ultra-low-q (ULQ) plasma in the REPUTE-1 torus device have been measured. Typical examples of ion and the electron temperatures in the RFP plasma are shown. The experimental results are the following: (1) The electron temperature is lower than the proton temperature. (2) The impurity ion temperature is higher than the proton temperature in the low-density RFP plasma. (3) During the q-value transition phase in the ULQ, the impurity temperature becomes quite high, but the proton temperature is unchanged. The results are not expected from the classical Ohmic heating theory. Relaxation and MHD instability are candidates to explain the results.

AB - The impurity ion, proton, and electron temperatures on a reversed field pinch (RFP) and an ultra-low-q (ULQ) plasma in the REPUTE-1 torus device have been measured. Typical examples of ion and the electron temperatures in the RFP plasma are shown. The experimental results are the following: (1) The electron temperature is lower than the proton temperature. (2) The impurity ion temperature is higher than the proton temperature in the low-density RFP plasma. (3) During the q-value transition phase in the ULQ, the impurity temperature becomes quite high, but the proton temperature is unchanged. The results are not expected from the classical Ohmic heating theory. Relaxation and MHD instability are candidates to explain the results.

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