Reconnection Events in Laboratory Plasmas and Inherently Intermittent Accretion in Astrophysics *

Details Reconnection Events in Laboratory Plasmas and Inherently Intermittent Accretion in Astrophysics * Reconnection Events in Laboratory Plasmas and Inherently Intermittent Accretion in Astrophysics *

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..dpprm1002c&link_type=abstract

American Physical Society, 43rd Annual Meeting of the APS Division of Plasma Physics October 29 - November 2, 2001 Long Beach, C

Physics

Plasma Physics

Scientific paper

In magnetically confined plasmas with a source of thermal energy, intermittent reconnection events are observed as a result of the recurrent excitation of internal modes, driven by the pressure gradient, that are singular in the ideal MHD approximation and depend on finite electrical resistivity. Sawtooth oscillations of the peak plasma pressure and of radiation emission then occur. Likewise, accretion on astrophysical objects surrounded by thin disks with significant magnetic energy densities (relative to the thermal energy density) is considered as a series of recurrent events resulting from the excitation of modes that transport angular momentum outward, depend on the finiteness of the plasma temperature, and have 4 characteristic singularitiesfootnotemark[1] where finite resistivity and viscosity are important. In addition, small departures from the adiabatic equation of state play a role at two of the singularities. The envisioned accretion cycle involves a preheating of the accumulated matter until the modes that provide the needed angular momentum transport are excited and allow accretion to begin. This continues until the disk is cooled or depleted and a new cycle restarts.footnotemark[1] * Sponsored by the U. S. Department of Energy. footnotetext[1]B. Coppi and P. S. Coppi, Phys. Rev. Lett. 87, 5 (2001)

Affiliated with

Also associated with

No associations

Rating

Reconnection Events in Laboratory Plasmas and Inherently Intermittent Accretion in Astrophysics * does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reconnection Events in Laboratory Plasmas and Inherently Intermittent Accretion in Astrophysics *, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reconnection Events in Laboratory Plasmas and Inherently Intermittent Accretion in Astrophysics * will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1103895