Modified February 2004 with thinner mylar or kapton degraders on Wheel
1; see

http://twist.triumf.ca/private/online/run_instructions/m13_absorbers_20040225.txt

for previous absorber settings.


Readout		Absorber	Collimator	Wheel 1		Wheel 2
Position	(inches)			Position	Position

0		0.0		-		1		1
		                
1		0.0005 (kapton)	-		4		1
		                
2		0.001 (mylar)	-		2		1
		                
3		0.005 (mylar)	-		3		1

4		0.0		1 cm vert	1		4
		                
5		0.0005 (kapton)	1 cm vert	4		4
		                
6		0.001 (mylar)	1 cm vert	2		4
		                
7		0.005 (mylar)	1 cm vert	3		4

8		0.0		1 inch vert	1		2
		                
9		0.0005 (kapton)	1 inch vert	4		2
		                
10		0.001 (mylar)	1 inch vert	2		2
		                
11		0.005 (mylar)	1 inch vert	3		2

12		0.0		-		1		3
		+ 0.046 (CH_2)	        

13		0.0005 (kapton)	-		4		3
		+ 0.046 (CH_2)  

14		0.001 (mylar)	-		2		3
		+ 0.046 (CH_2)  

15		0.005 (mylar)	-		3		3
		+ 0.046 (CH_2)

Wheel 1, immediately downstream of F1H horizontal slit,  has an empty
hole plus three holes with different thicknesses (nominally 0.0005 inches
kapton, 0.001 inches mylar, 0.005 inches mylar) of absorber.

Wheel 2, immediately downstream of Wheel 1, has an empty hole plus two
holes with different vertical collimators (1 cm and 1 inch) and a
fourth hole with 0.046 inches of CH_2 absorber.

The readout position has been known to be incorrect. If in doubt, try moving
to a position which makes both wheels move, then move back.