Chopper Parameters

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MARI Choppers

MARI uses range of Fermi choppers with the following parameters:

 Length of slits: 100mm
 Slats: Boron fibre reinforced resin
 Slits: Hollow aluminium frame

Other parameters:

Chopper	Curvature Radius (mm)	Slit width (mm)	Slat width (mm)
Chopper A (500mEv):	1300	0.76	0.55
Chopper B (200mEv):	820	1.14	0.55
Chopper С (100mEv):	580	1.52	0.55
Chopper В (50mEv):	410	1.52	0.55
Chopper S (Sloppy):	1300	2.28	0.55

MERLIN Choppers

These have following parameters:

Chopper	Curvature Radius (mm)	Slit width (mm)	Absorber Thickness (mm)	Total Package Thickness (mm)
Fermi:	1300	2.30	0.55	98.
Gd:	Inf	0.2	0.02	10.

LET Choppers

These have following parameters:

Chopper	Radius (mm)	Slot width (mm)	Guide width (mm)	Number of slots	Number of Disks	Distance (m)
Disk 1	290	40	40	6	2	7.83
Disk 2	545	890	40	1	1	8.4
Disk 3	N/A	N/A	N/A	N/A	N/A	N/A
Disk 4	290	52	40	6	1	15.66
Disk 5	290	10	10	2	2	23.5

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