[ Identification | Description | Input parameters | Links ]

# The `Powder1` Component

General powder sample with a single scattering vector.

## Identification

- Site:
- Author: E.M.Lauridsen, N.B.Christensen, A.B.Abrahamsen
- Origin: Risoe
- Date: 4.2.98

## Description

    General powder sample with a single scattering vector. No multiple ,
    scattering, no incoherent scattering, no secondary extinction.
    The shape of the sample may be a cylinder of given radius or a box with
    dimensions xwidth, yheight, zdepth.
    The efficient is highly improved when restricting the vertical scattering
    range on the Debye-Scherrer cone (with 'd_phi').
    You may use PowderN to use N scattering lines defined in a file.

    Example: Powder1(radius=0.015,yheight=0.05,q =1.8049,d_phi=0.07,pack=1,
    j=6,DW=1,F2=56.8,Vc=85.0054,sigma_abs=0.463)

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default |
radius | m | Radius of sample in (x,z) plane | 0.01 |
yheight | m | Height of sample y direction | 0.05 |
xwidth | m | horiz. dimension of sample, as a width | 0 |
zdepth | m | depth of box sample | 0 |
q |  | Scattering vector of reflection [AA^-1] | 1.8049 |
d | AA | d-spacing for sample, overrides 'q' | 0 |
d_phi | deg,0-180 | Angle corresponding to the vertical angular range to focus to, e.g. detector height. 0 for no focusing | 0 |
pack | 1 | Packing factor | 1 |
j | 1 | Multiplicity of reflection | 6 |
DW | 1 | Debye-Waller factor of reflection | 1 |
F2 | barns | Structure factor of reflection | 56.8 |
Vc | AA^3 | Volume of unit cell | 85.0054 |
sigma_abs | barns | Absorption cross section per unit cell at 2200 m/s | 0.463 |

AT ( | , | , |  | ) RELATIVE |  |
ROTATED ( | , | , |  | ) RELATIVE |

## Links

- Source code for `Powder1.comp`.
- Test results (not up-to-date).
- See also: Powder1, Powder2 and PowderN

[ Identification | Description | Input parameters | Links ]