j0j0_element — j0j0_element • j0j0r

Function to calculate terms in the unscreened current fluctuation correlation tensor. I.e th integral in in eq. 25 of Bindslev 1996, JATP 58, 983.

j0j0_element(
  directions,
  k,
  phi,
  frequency,
  B,
  A,
  Z,
  distribution,
  integration_method
)

Arguments

directions	`character` vector with two spatial directions: a combination of x, y, and z. e.g xx, xy or yz.
k	`numeric` length of the fluctuation wavevector.
phi	`numeric` angle (in degrees) between the magnetic field and the fluctuation wavevector
frequency	`numeric` fluctuation frequency in Hz.
B	`numeric` strength of magnetic field in Tesla.
A	`numeric` particle mass number.
Z	`numeric` particle charge number.
distribution	`list` with the velocity distribution and associated settings.
integration_method	`character` method to use for integration. One of "stats", "hcubature", "pcubature", "cuhre", "divonne", "suave", "vegas"

complex