As shown above, OH1 contains optical components for both MASSIF and ID30B/MAD. Shown below is only the layout of the first branch - MASSIF.

OH1_MASSIF.JPG

Optical Elements Description Distances
Primary slits Two water-cooled copper blocks with a square-shaped hole, cutting the beam size to 3 x 1 mm2 (h x v)  
White Beam Attenuator Contains foils of different thickness of pyro-carbon and aluminium  
Safety Beam Shutter    


See here a top overview of OH1 with MASSIF and MAD.