C INPUT PARAMETERS:
C  The input parameters are divided into sections related to the storage ring,
C  the undulator device, and the quantity to be calculated. Note: When modifying
C  parameters under the Xus interface, double click the field and make sure to
C  press the RETURN key so that the new parameter is accepted.
C Machine Parameters:
C  Storage ring energy 			(GeV)
C  Storage ring current			(mA)
C  RMS beam size (horizontal)		(mm)
C  RMS beam size (vertical)		(mm)
C  RMS beam divergence (horizontal)	(mrad)
C  RMS beam divergence (vertical)	(mrad)
C Undulator Parameters:
C  Period length			(cm)
C  Number of periods
C  Deflection parameter (hor.  field) Kx (= 0.0 for a regular planar device)
C  Deflection parameter (vert. field) Ky
C Scan Parameters:
C  Minimum energy			(eV)
C  Maximum energy			(eV)
C  Number of energy points
C Pinhole Parameters:
C  Distance from the source		(m)
C    (d=0.0 => angular units)
C  X-coordinate for center of pinhole	(mm) or (mrad)
C  Y-coordinate for center of pinhole	(mm) or (mrad)
C  X-size of pinhole (full width)	(mm) or (mrad)
C  Y-size of pinhole (full width)	(mm) or (mrad)
C    (for angular units (d=0.0) values are entered in mrad)
C    (X is for horizontal direction)
C    (Y is for the vertical direction)
C  Number of subdivisions of pinhole in X (max 50)
C  Number of subdivisions of pinhole in Y (max 50)
C    (for plotting 3d results with Xus, the X-size, Y-size, and the number of
C     of subdivisions in the two directions should be equal)