Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR

Z. Chang; W. Park; E. D. Fredrickson; S. H. Batha; M. G. Bell; R. Bell; R. V. Budny; C. E. Bush; A. Janos; F. M. Levinton; K. M. McGuire; H. Park; S. A. Sabbagh; G. L. Schmidt; S. D. Scott; E. J. Synakowski; H. Takahashi; G. Taylor; M. C. Zarnstorff

doi:10.1103/PhysRevLett.77.3553

Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR

Z. Chang, W. Park, E. D. Fredrickson, S. H. Batha, M. G. Bell, R. Bell, R. V. Budny, C. E. Bush, A. Janos, F. M. Levinton, K. M. McGuire, H. Park, S. A. Sabbagh, G. L. Schmidt, S. D. Scott, E. J. Synakowski, H. Takahashi, G. Taylor, M. C. Zarnstorff

Columbia University

Research output: Contribution to journal › Article › peer-review

155 Scopus citations

Abstract

Off-axis sawteeth are often observed in reversed magnetic shear plasmas when the minimum safety factor q is near or below 2. Fluctuations with m/n = 2/1 (m and n are the poloidal and toroidal mode numbers) appear before and after the crashes. Detailed comparison has been made between the measured T_e profile evolution during the crash and a nonlinear numerical magnetohydrodynamics (MHD) simulation. The good agreement between the observation and simulation indicates that the off-axis sawteeth are due to a double-tearing magnetic reconnection process

Original language	English
Pages (from-to)	3553-3556
Number of pages	4
Journal	Physical Review Letters
Volume	77
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.77.3553
State	Published - 1996

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Chang, Z., Park, W., Fredrickson, E. D., Batha, S. H., Bell, M. G., Bell, R., Budny, R. V., Bush, C. E., Janos, A., Levinton, F. M., McGuire, K. M., Park, H., Sabbagh, S. A., Schmidt, G. L., Scott, S. D., Synakowski, E. J., Takahashi, H., Taylor, G., & Zarnstorff, M. C. (1996). Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR. Physical Review Letters, 77(17), 3553-3556. https://doi.org/10.1103/PhysRevLett.77.3553

@article{e076ee74092b4f05af688eedfc67e097,

title = "Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR",

abstract = "Off-axis sawteeth are often observed in reversed magnetic shear plasmas when the minimum safety factor q is near or below 2. Fluctuations with m/n = 2/1 (m and n are the poloidal and toroidal mode numbers) appear before and after the crashes. Detailed comparison has been made between the measured Te profile evolution during the crash and a nonlinear numerical magnetohydrodynamics (MHD) simulation. The good agreement between the observation and simulation indicates that the off-axis sawteeth are due to a double-tearing magnetic reconnection process",

author = "Z. Chang and W. Park and Fredrickson, {E. D.} and Batha, {S. H.} and Bell, {M. G.} and R. Bell and Budny, {R. V.} and Bush, {C. E.} and A. Janos and Levinton, {F. M.} and McGuire, {K. M.} and H. Park and Sabbagh, {S. A.} and Schmidt, {G. L.} and Scott, {S. D.} and Synakowski, {E. J.} and H. Takahashi and G. Taylor and Zarnstorff, {M. C.}",

year = "1996",

doi = "10.1103/PhysRevLett.77.3553",

language = "English",

volume = "77",

pages = "3553--3556",

number = "17",

}

Chang, Z, Park, W, Fredrickson, ED, Batha, SH, Bell, MG, Bell, R, Budny, RV, Bush, CE, Janos, A, Levinton, FM, McGuire, KM, Park, H, Sabbagh, SA, Schmidt, GL, Scott, SD, Synakowski, EJ, Takahashi, H, Taylor, G & Zarnstorff, MC 1996, 'Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR', Physical Review Letters, vol. 77, no. 17, pp. 3553-3556. https://doi.org/10.1103/PhysRevLett.77.3553

TY - JOUR

T1 - Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR

AU - Chang, Z.

AU - Park, W.

AU - Fredrickson, E. D.

AU - Batha, S. H.

AU - Bell, M. G.

AU - Bell, R.

AU - Budny, R. V.

AU - Bush, C. E.

AU - Janos, A.

AU - Levinton, F. M.

AU - McGuire, K. M.

AU - Park, H.

AU - Sabbagh, S. A.

AU - Schmidt, G. L.

AU - Scott, S. D.

AU - Synakowski, E. J.

AU - Takahashi, H.

AU - Taylor, G.

AU - Zarnstorff, M. C.

PY - 1996

Y1 - 1996

N2 - Off-axis sawteeth are often observed in reversed magnetic shear plasmas when the minimum safety factor q is near or below 2. Fluctuations with m/n = 2/1 (m and n are the poloidal and toroidal mode numbers) appear before and after the crashes. Detailed comparison has been made between the measured Te profile evolution during the crash and a nonlinear numerical magnetohydrodynamics (MHD) simulation. The good agreement between the observation and simulation indicates that the off-axis sawteeth are due to a double-tearing magnetic reconnection process

AB - Off-axis sawteeth are often observed in reversed magnetic shear plasmas when the minimum safety factor q is near or below 2. Fluctuations with m/n = 2/1 (m and n are the poloidal and toroidal mode numbers) appear before and after the crashes. Detailed comparison has been made between the measured Te profile evolution during the crash and a nonlinear numerical magnetohydrodynamics (MHD) simulation. The good agreement between the observation and simulation indicates that the off-axis sawteeth are due to a double-tearing magnetic reconnection process

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U2 - 10.1103/PhysRevLett.77.3553

DO - 10.1103/PhysRevLett.77.3553

M3 - Article

AN - SCOPUS:4243964471

SN - 0031-9007

VL - 77

SP - 3553

EP - 3556

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

ER -

Off-axis sawteeth and double-tearing reconnection in reversed magnetic shear plasmas in TFTR

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