target	material	shape
above 1	Al	ribbon 50 µm * 500 µm
below 1	C	ribbon 100 µm * 500 µm
inner 1	W	round with 50 µm diameter
outer 1	Ti	round with 50 µm diameter
above 2	Pd	round with 50 µm diameter
below 2	Ti	round with 50 µm diameter
inner 2	C	ribbon 100 µm * 500 µm
outer 2	C	ribbon 100 µm * 500 µm