neutronpy.instrument.instrument.Instrument.mono

Instrument.mono

A structure that describes the monochromator.

Parameters:

tau : str or float

The monochromator reciprocal lattice vector in Å^-1. Instead of a numerical input one can use one of the following keyword strings:

String	τ
Be(002)	3.50702
Co0.92Fe0.08(200)	3.54782	(Heusler)
Cu(002)	3.47714
Cu(111)	2.99913
Cu(220)	4.91642
Cu2MnAl(111)	1.82810	(Heusler)
Ge(111)	1.92366
Ge(220)	3.14131
Ge(311)	3.68351
Ge(511)	5.76968
Ge(533)	7.28063
PG(002)	1.87325
PG(004)	3.74650
PG(110)	5.49806
Si(111)	2.00421

mosaic : int

The monochromator mosaic in minutes of arc.

vmosaic : int

The vertical mosaic of monochromator in minutes of arc. If this field is left unassigned, an isotropic mosaic is assumed.

dir : int

Direction of the crystal (left or right, -1 or +1, respectively). Default: -1 (left-handed coordinate frame).

rh : float

Horizontal curvature of the monochromator in cm.

rv : float

Vertical curvature of the monochromator in cm.