{
  "id": "2203.12568",
  "version": "v1",
  "published": "2022-03-23T17:28:33.000Z",
  "updated": "2022-03-23T17:28:33.000Z",
  "title": "A Kinetic Study of the Saturation of the Bell Instability",
  "authors": [
    "Georgios Zacharegkas",
    "Damiano Caprioli",
    "Colby Haggerty",
    "Siddhartha Gupta"
  ],
  "comment": "37th International Cosmic Ray Conference (ICRC2021), held 12-23 July, 2021 in Berlin, Germany - Online at $\\href{https://pos.sissa.it/395/}{\\rm this \\; https \\; URL}$, 8 pages, 3 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The nonresonant cosmic ray instability, predicted by Bell (2004), is thought to play an important role in the acceleration and confinement of cosmic rays (CR) close to supernova remnants. Despite its importance, the exact mechanism responsible for the saturation of the instability has not been determined, and there is no first-principle prediction for the amplitude of the saturated magnetic field. Using a survey of self-consistent hybrid simulations (with kinetic ions and fluid electrons), we study the non-linear evolution of the Bell instability as a function of the parameters of the CR population. We find that saturation is achieved when the magnetic pressure in the amplified field is comparable to the initial CR momentum flux.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-03-23T17:28:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "bell instability",
      "kinetic study",
      "saturation",
      "nonresonant cosmic ray instability",
      "initial cr momentum flux"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}