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const_and_precisions.f90
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!#######################################################################
MODULE const_and_precisions
!########################################################################!
IMPLICIT NONE
PUBLIC
!------------------------------------------------------------------------
! common precisions
!------------------------------------------------------------------------
INTEGER, PARAMETER :: sp_ = 4 ! single precision
INTEGER, PARAMETER :: dp_ = 8 ! double precision
! INTEGER, PARAMETER :: sp_ = KIND(1.0E0) ! single precision
! INTEGER, PARAMETER :: dp_ = KIND(1.0D0) ! double precision
INTEGER, PARAMETER :: wp_ = dp_ ! work-precision
INTEGER, PARAMETER :: odep_ = dp_ ! ODE-solver precision
!------------------------------------------------------------------------
! precisions which are in use in CONFIG_yat
!------------------------------------------------------------------------
INTEGER, PARAMETER :: ypi_ = 4 ! <- direct precision def.
INTEGER, PARAMETER :: ypd_ = 8 ! <- direct precision def.
!------------------------------------------------------------------------
! length of the file names
!------------------------------------------------------------------------
INTEGER, PARAMETER :: lfn_ = 256 ! <- requested for yat
!========================================================================
! Arithmetic constants
!========================================================================
REAL(wp_), PARAMETER :: zero = 0.0_wp_
REAL(wp_), PARAMETER :: unit = 1.0_wp_
REAL(wp_), PARAMETER :: pi = 3.141592653589793_wp_
REAL(wp_), PARAMETER :: sqrt_pi = 1.772453850905516_wp_
REAL(wp_), PARAMETER :: sqrt_2 = 1.414213562373095_wp_
REAL(wp_), PARAMETER :: rad = pi/180.0_wp_
!---
REAL(wp_), PARAMETER :: ex(1:3) = (/unit,zero,zero/)
REAL(wp_), PARAMETER :: ey(1:3) = (/zero,unit,zero/)
REAL(wp_), PARAMETER :: ez(1:3) = (/zero,zero,unit/)
!---
REAL(wp_), PARAMETER :: kron(3,3) = reshape((/unit,zero,zero, &
zero,unit,zero, &
zero,zero,unit/),(/3,3/))
COMPLEX(wp_), PARAMETER :: im = (0.0_wp_,1.0_wp_)
COMPLEX(wp_), PARAMETER :: czero = (0.0_wp_,0.0_wp_)
COMPLEX(wp_), PARAMETER :: cunit = (1.0_wp_,0.0_wp_)
COMPLEX(wp_), PARAMETER :: ctwo = (2.0_wp_,0.0_wp_)
!========================================================================
! Computer constants
!========================================================================
REAL(wp_), PARAMETER :: comp_eps = EPSILON(unit)
REAL(wp_), PARAMETER :: comp_eps2 = comp_eps**2
REAL(wp_), PARAMETER :: comp_tiny = TINY(unit)
REAL(wp_), PARAMETER :: comp_huge = HUGE(unit)
REAL(wp_), PARAMETER :: comp_tinylog =-200 ! LOG10(comp_tiny)
REAL(wp_), PARAMETER :: comp_hugelog =+200 ! LOG10(comp_huge)
! REAL(wp_), PARAMETER :: comp_tiny1 = 1d+50*comp_tiny
! REAL(wp_), PARAMETER :: comp_huge1 = 1d-50*comp_huge
! REAL(wp_), PARAMETER :: comp_tiny1log = LOG10(comp_tiny1)
! REAL(wp_), PARAMETER :: comp_huge1log = LOG10(comp_huge1)
!------------------------------------------------------------------------
! Conventional constants
!------------------------------------------------------------------------
REAL(wp_), PARAMETER :: output_tiny = 1.0d-66
REAL(wp_), PARAMETER :: output_huge = 1.0d+66
!========================================================================
! Physical constants (SI)
!========================================================================
REAL(wp_), PARAMETER :: e_ = 1.601917d-19 ! [C]
REAL(wp_), PARAMETER :: me_ = 9.109558d-31 ! [kg]
REAL(wp_), PARAMETER :: mp_ = 1.672614d-27 ! [kg]
REAL(wp_), PARAMETER :: rmpe_ = mp_/me_
REAL(wp_), PARAMETER :: c_ = 2.997925d+08 ! [m/s]
REAL(wp_), PARAMETER :: eps0_ = 8.854188d-12 ! [F/m]
!------------------------------------------------------------------------
! Useful definitions
!------------------------------------------------------------------------
REAL(wp_), PARAMETER :: keV_ = 1000*e_ ! [J]
REAL(wp_), PARAMETER :: mc2_SI = me_*c_**2 ! [J]
REAL(wp_), PARAMETER :: mc2_ = mc2_SI/keV_ ! [keV]
REAL(wp_), PARAMETER :: mc_ = me_*c_ ! [kg*m/s]
! f_ce = fce1_*B (B in Tesla): !
REAL(wp_), PARAMETER :: wce1_ = e_/me_ ! [rad/s]
REAL(wp_), PARAMETER :: fce1_ = wce1_/(2*pi) ! [1/s]
! f_pl = fpe1_*sqrt(Ne) (Ne in 1/m**3): !
REAL(wp_), PARAMETER :: wpe1_ = 56.4049201 ! [rad/s]
REAL(wp_), PARAMETER :: fpe1_ = wpe1_/(2*pi) ! [1/s]
REAL(wp_), PARAMETER :: wpe12_ = wpe1_**2 !
! vte = vte1_*sqrt(Te) (Te in keV): !
REAL(wp_), PARAMETER :: vte1_ = 1.8755328e7 ! [m/s]
! je = curr1_*sqrt(Te)*Ne (Ne in 1/m**3): !
REAL(wp_), PARAMETER :: curr1_ = e_*vte1_ ! [A/m**2]
!========================================================================
! Upper limit for the momentum value for integration
!========================================================================
REAL(wp_), PARAMETER :: umax_ = 7.0d0 ! max of (p/pth)
INTEGER, PARAMETER :: nu_ = 700 ! size of upar-array
!========================================================================
! minimal value of Nparallel
!========================================================================
REAL(wp_), PARAMETER :: Npar_min = 1.0d-2
!########################################################################!
END MODULE const_and_precisions
!########################################################################!