bem_pusher Module

荷電粒子の時間発展にBoris法を適用する運動方程式ソルバ。

Uses

- bem_kinds
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Used by

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Graph Key

Nodes of different colours represent the following:

Solid arrows point from a submodule to the (sub)module which it is descended from. Dashed arrows point from a module or program unit to modules which it uses.
Where possible, edges connecting nodes are given different colours to make them easier to distinguish in large graphs.

Functions

public pure function cross(a, b) result(c)

3次元ベクトルの外積を返す基本演算。

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=dp),	intent(in)			::	a(3)
real(kind=dp),	intent(in)			::	b(3)

Return Value real(kind=dp), (3)

Subroutines

public subroutine boris_push(x, v, q, m, dt, e, b, x_new, v_new)

電場半ステップ加速と磁場回転を組み合わせ、1タイムステップ後の位置・速度を計算する。

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=dp),	intent(in)			::	x(3)
real(kind=dp),	intent(in)			::	v(3)
real(kind=dp),	intent(in)			::	q	粒子1個あたりの電荷 [C]。
real(kind=dp),	intent(in)			::	m	粒子1個あたりの電荷 [C]。粒子1個あたりの質量 [kg]。
real(kind=dp),	intent(in)			::	dt	粒子1個あたりの電荷 [C]。粒子1個あたりの質量 [kg]。時間刻み幅 [s]。
real(kind=dp),	intent(in)			::	e(3)	粒子1個あたりの電荷 [C]。粒子1個あたりの質量 [kg]。時間刻み幅 [s]。
real(kind=dp),	intent(in)			::	b(3)	粒子1個あたりの電荷 [C]。粒子1個あたりの質量 [kg]。時間刻み幅 [s]。
real(kind=dp),	intent(out)			::	x_new(3)
real(kind=dp),	intent(out)			::	v_new(3)