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Title: Laboratory Study Of Magnetic Reconnection With A Density Asymmetry Across The Current Sheet

Abstract

The effects of an upstream density asymmetry on magnetic reconnection are studied systematically in a laboratory plasma. Despite a significant upstream density asymmetry of up to 10, the reconnecting magnetic field pro file is not signifi cantly changed. On the other hand, the out-of-plane magnetic field profile is considerably modified; it is almost bipolar in structure with the density asymmetry, as compared to the quadrupolar structure in the symmetric configuration. The in-plane ion flow pattern and the electrostatic potential pro file are also affected by the density asymmetry. Strong bulk electron heating is observed near the low-density-side separatrix together with electromagnetic fluctuations in the lower hybrid frequency range. The dependence of the ion outflow and reconnection electric field on the density asymmetry is measured and compared with theoretical expectations.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1129427
Report Number(s):
PPPL-5018
DOE Contract Number:  
DE-ACO2-09CH11466
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Astrophysics, Magnetic Reconnection,

Citation Formats

Yoo, Joseph, Yamada, Massaaki, Ji, Hantao, Meyers, Clayton E., Jara-Almonte,, and Chen, Li-Jen. Laboratory Study Of Magnetic Reconnection With A Density Asymmetry Across The Current Sheet. United States: N. p., 2014. Web. doi:10.2172/1129427.
Yoo, Joseph, Yamada, Massaaki, Ji, Hantao, Meyers, Clayton E., Jara-Almonte,, & Chen, Li-Jen. Laboratory Study Of Magnetic Reconnection With A Density Asymmetry Across The Current Sheet. United States. doi:10.2172/1129427.
Yoo, Joseph, Yamada, Massaaki, Ji, Hantao, Meyers, Clayton E., Jara-Almonte,, and Chen, Li-Jen. Fri . "Laboratory Study Of Magnetic Reconnection With A Density Asymmetry Across The Current Sheet". United States. doi:10.2172/1129427. https://www.osti.gov/servlets/purl/1129427.
@article{osti_1129427,
title = {Laboratory Study Of Magnetic Reconnection With A Density Asymmetry Across The Current Sheet},
author = {Yoo, Joseph and Yamada, Massaaki and Ji, Hantao and Meyers, Clayton E. and Jara-Almonte, and Chen, Li-Jen},
abstractNote = {The effects of an upstream density asymmetry on magnetic reconnection are studied systematically in a laboratory plasma. Despite a significant upstream density asymmetry of up to 10, the reconnecting magnetic field pro file is not signifi cantly changed. On the other hand, the out-of-plane magnetic field profile is considerably modified; it is almost bipolar in structure with the density asymmetry, as compared to the quadrupolar structure in the symmetric configuration. The in-plane ion flow pattern and the electrostatic potential pro file are also affected by the density asymmetry. Strong bulk electron heating is observed near the low-density-side separatrix together with electromagnetic fluctuations in the lower hybrid frequency range. The dependence of the ion outflow and reconnection electric field on the density asymmetry is measured and compared with theoretical expectations.},
doi = {10.2172/1129427},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {4}
}