Mach number dependence of electron heating in high Mach number quasiperpendicular shocks

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    The efficiency of electron heating through microinstabilities generated in the transition region of a quasiperpendicular shock for a wide range of Mach numbers is investigated by utilizing particle-in-cell (PIC) simulation and model analyses. In the model analyses saturation levels of effective electron temperature as a result of microinstabilities are estimated from an extended quasilinear (trapping) analysis for relatively low (high) Mach number shocks. Here, modified two-stream instability (MTSI) is assumed to become dominant in low Mach number regime, while Buneman instability (BI) is assumed to become dominant in high Mach number regime. It is revealed that Mach number dependence of the effective electron temperature in the MTSI dominant case is essentially different from that in the BI dominant case. The effective electron temperature through the MTSI does not depend much on the Mach number, although that through the BI increases with the Mach number as in the past studies. The results are confirmed to be consistent with the PIC simulations both in qualitative and quantitative levels. The model analyses predict that a critical Mach number, above which a steep rise in electron heating rate occurs, may arise at the Mach number of a few tens.

    Original languageEnglish
    Article number042901
    JournalPhysics of Plasmas
    Volume17
    Issue number4
    DOIs
    Publication statusPublished - Apr 1 2010

    Fingerprint

    Mach number
    shock
    heating
    electrons
    electron energy
    critical Mach number
    cells
    simulation
    trapping
    saturation

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

    Cite this

    Mach number dependence of electron heating in high Mach number quasiperpendicular shocks. / Matsukiyo, Shuichi.

    In: Physics of Plasmas, Vol. 17, No. 4, 042901, 01.04.2010.

    Research output: Contribution to journalArticle

    @article{4c5f22bb22b4459eb6166b11da79db8d,
    title = "Mach number dependence of electron heating in high Mach number quasiperpendicular shocks",
    abstract = "The efficiency of electron heating through microinstabilities generated in the transition region of a quasiperpendicular shock for a wide range of Mach numbers is investigated by utilizing particle-in-cell (PIC) simulation and model analyses. In the model analyses saturation levels of effective electron temperature as a result of microinstabilities are estimated from an extended quasilinear (trapping) analysis for relatively low (high) Mach number shocks. Here, modified two-stream instability (MTSI) is assumed to become dominant in low Mach number regime, while Buneman instability (BI) is assumed to become dominant in high Mach number regime. It is revealed that Mach number dependence of the effective electron temperature in the MTSI dominant case is essentially different from that in the BI dominant case. The effective electron temperature through the MTSI does not depend much on the Mach number, although that through the BI increases with the Mach number as in the past studies. The results are confirmed to be consistent with the PIC simulations both in qualitative and quantitative levels. The model analyses predict that a critical Mach number, above which a steep rise in electron heating rate occurs, may arise at the Mach number of a few tens.",
    author = "Shuichi Matsukiyo",
    year = "2010",
    month = "4",
    day = "1",
    doi = "10.1063/1.3372137",
    language = "English",
    volume = "17",
    journal = "Physics of Plasmas",
    issn = "1070-664X",
    publisher = "American Institute of Physics Publising LLC",
    number = "4",

    }

    TY - JOUR

    T1 - Mach number dependence of electron heating in high Mach number quasiperpendicular shocks

    AU - Matsukiyo, Shuichi

    PY - 2010/4/1

    Y1 - 2010/4/1

    N2 - The efficiency of electron heating through microinstabilities generated in the transition region of a quasiperpendicular shock for a wide range of Mach numbers is investigated by utilizing particle-in-cell (PIC) simulation and model analyses. In the model analyses saturation levels of effective electron temperature as a result of microinstabilities are estimated from an extended quasilinear (trapping) analysis for relatively low (high) Mach number shocks. Here, modified two-stream instability (MTSI) is assumed to become dominant in low Mach number regime, while Buneman instability (BI) is assumed to become dominant in high Mach number regime. It is revealed that Mach number dependence of the effective electron temperature in the MTSI dominant case is essentially different from that in the BI dominant case. The effective electron temperature through the MTSI does not depend much on the Mach number, although that through the BI increases with the Mach number as in the past studies. The results are confirmed to be consistent with the PIC simulations both in qualitative and quantitative levels. The model analyses predict that a critical Mach number, above which a steep rise in electron heating rate occurs, may arise at the Mach number of a few tens.

    AB - The efficiency of electron heating through microinstabilities generated in the transition region of a quasiperpendicular shock for a wide range of Mach numbers is investigated by utilizing particle-in-cell (PIC) simulation and model analyses. In the model analyses saturation levels of effective electron temperature as a result of microinstabilities are estimated from an extended quasilinear (trapping) analysis for relatively low (high) Mach number shocks. Here, modified two-stream instability (MTSI) is assumed to become dominant in low Mach number regime, while Buneman instability (BI) is assumed to become dominant in high Mach number regime. It is revealed that Mach number dependence of the effective electron temperature in the MTSI dominant case is essentially different from that in the BI dominant case. The effective electron temperature through the MTSI does not depend much on the Mach number, although that through the BI increases with the Mach number as in the past studies. The results are confirmed to be consistent with the PIC simulations both in qualitative and quantitative levels. The model analyses predict that a critical Mach number, above which a steep rise in electron heating rate occurs, may arise at the Mach number of a few tens.

    UR - http://www.scopus.com/inward/record.url?scp=77952402303&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77952402303&partnerID=8YFLogxK

    U2 - 10.1063/1.3372137

    DO - 10.1063/1.3372137

    M3 - Article

    AN - SCOPUS:77952402303

    VL - 17

    JO - Physics of Plasmas

    JF - Physics of Plasmas

    SN - 1070-664X

    IS - 4

    M1 - 042901

    ER -