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
|