Module strs_mod

module strs_mod

        ! Uses
    use precision_mod
    use physicalconstants_mod
    use namelist_mod
    use det_geom_mod

        ! Variables
    integer, private, external :: dtt_read
    real (kind=r8), private, external :: dtt_gettime
    integer (kind=i4), private, parameter :: NX_IND = 201
    integer (kind=i4), private, parameter :: NY_IND = 201
    real (kind=r8), private :: x_inc = 0.0010
    integer (kind=i4), private, PARAMETER :: MaxTimeBin = 3000
    integer (kind=i4), private, PARAMETER :: MaxAngleBin = 200
    real (kind=r4), public, DIMENSION(0:MaxAngleBin,0:MaxTimeBin) :: GARFIELD
    real (kind=r4), public, DIMENSION(0:MaxAngleBin) :: MaxTime
    real (kind=r4), private, DIMENSION(0:MaxAngleBin,0:MaxTimeBin) :: GARF_F1
    real (kind=r4), private, DIMENSION(0:MaxAngleBin,0:MaxTimeBin) :: GARF_F2

        ! Subroutines and functions
    public subroutine init_strs (nrun)
    private subroutine create_STRs (NRUN, GARFIELD1, MaxTime1)
    private subroutine interpolate (x, y, nPts, xout, yout, MaxTimeBin)
    private subroutine linearInt (xa, ya, n, x, y)
    private subroutine splint (xa, ya, y2a, n, x, y)
    private subroutine spline (x, y, y2, n)

end module strs_mod

Description of Variables

integer, private, external :: dtt_read

real (kind=r8), private, external :: dtt_gettime

integer (kind=i4), private, parameter :: NX_IND = 201

integer (kind=i4), private, parameter :: NY_IND = 201

real (kind=r8), private :: x_inc = 0.0010

integer (kind=i4), private, PARAMETER :: MaxTimeBin = 3000

integer (kind=i4), private, PARAMETER :: MaxAngleBin = 200

real (kind=r4), public, DIMENSION(0:MaxAngleBin,0:MaxTimeBin) :: GARFIELD

real (kind=r4), public, DIMENSION(0:MaxAngleBin) :: MaxTime

real (kind=r4), private, DIMENSION(0:MaxAngleBin,0:MaxTimeBin) :: GARF_F1

real (kind=r4), private, DIMENSION(0:MaxAngleBin,0:MaxTimeBin) :: GARF_F2

Description of Subroutines and Functions

public subroutine init_strs (nrun)
    integer (kind=i4), intent(in) :: nrun
    ! Calls: create_strs
end subroutine init_strs
Date:   May 24,2001
 Mod Art Olin to avoid compiler bug and localize code
Entry routine from MOFIA to create the STRs
.
Called from ReadCalib in calibrations_mod
**********************************************************************

Author: : Roy Wilds

private subroutine create_STRs (NRUN, GARFIELD1, MaxTime1)
    integer (kind=i4), INTENT(IN) :: NRUN
    real (kind=r4), dimension(0:MaxAngleBin,0:MaxTimeBin), INTENT(OUT) :: GARFIELD1
    real (kind=r4), dimension(0:maxanglebin), INTENT(OUT) :: MaxTime1
    ! Calls: Interpolate, fill_STRs, generate_tracksX, generate_tracksY, kerror, kerror2, sortzv
end subroutine create_STRs
Date:   May 24,2001
Procedure is: 
 -Set the parameters for the STRs.
 -Read in the Drift Time Table.
 -Loop thru angles from 0 to upperlimit:
   -Generate distances,times for straight tracks at current angle
   -Interpolate d vs t to get d as a function of t, with specific
    increments in t.
   -Fill STR structure with current angle info.
   -Move onto next angle.
 -Finished.
Comments on creation of STRs:
The STRs produced by this method differ from those created using the old
method. For more information, check out: 
 http://e614slow.triumf.ca/e614/offline/garfield/index.html
This website is also accessible from the TWIST software page.

Author: : Roy Wilds

private subroutine interpolate (x, y, nPts, xout, yout, MaxTimeBin)
    real, INTENT(INOUT), dimension (:) :: x
    real, INTENT(INOUT), dimension (:) :: y
    integer, INTENT(INOUT) :: nPts
    integer, INTENT(OUT), dimension (:) :: xout
    real, INTENT(OUT), dimension (:) :: yout
    integer, INTENT(IN) :: MaxTimeBin
    ! Calls: spline, splint
end subroutine interpolate
Author: Roy Wilds
Date:   May 24,2001
Majority of code has been taken from Sun-Chong's garfield_to_mofia
program. See specific routines below for details on code sources.
Method is to use a piece-wise cubic spline fit to take the 
x,y values (which are initially in constant increments
of y), and calculate values of y for constant
increments in x.

private subroutine linearInt (xa, ya, n, x, y)
    real, DIMENSION(n), INTENT (IN) :: xa
    real, DIMENSION(n), INTENT (IN) :: ya
    integer, INTENT (IN) :: n
    real, INTENT (IN) :: x
    real, INTENT (OUT) :: y
end subroutine linearInt

private subroutine splint (xa, ya, y2a, n, x, y)
    real, DIMENSION(n), INTENT (IN) :: xa
    real, DIMENSION(n), INTENT (IN) :: ya
    real, DIMENSION(n), INTENT (IN) :: y2a
    integer, INTENT (IN) :: n
    real, INTENT (IN) :: x
    real, INTENT (OUT) :: y
end subroutine splint

private subroutine spline (x, y, y2, n)
    real, DIMENSION(n), INTENT (IN) :: x
    real, DIMENSION(n), INTENT (IN) :: y
    real, DIMENSION(n), INTENT (INOUT) :: y2
    integer, intent (in) :: n
    ! Calls: kerror
end subroutine spline