VF HF-50 - Page 22

Technical specification
VF1807090083 EN revision 22
3.3. Smart Frisking Probe SFP-100
Detectors specification
Detected radiation
SFP-100A: Alpha in one channel
SFP-100B: Alpha + Beta in one channel
SFP-100C: Alpha / Beta in two channels
SFP-100D: Alpha + Beta + Gamma in one channel
SFP-100E: Alpha / Beta+Gamma in two channels
Scintillators
SFP-100A: ZnS(Ag) on acrylic glass, 1.5 mm thickness.
Surface density of the scintillator (3.25 ± 0.25) mg∙cm
-2
SFP-100B: plastic scintillator of 0.25 mm thickness
SFP-100C: ZnS(Ag) on a plastic scintillator of 0.25 mm thickness.
Surface density of the scintillator ZnS(Ag) (3.25 ± 0.25) mg∙cm
-2
SFP-100D: plastic scintillator of 5 mm thickness
SFP-100E: ZnS(Ag) on a plastic scintillator of 5 mm thickness
Surface density of the scintillator ZnS(Ag) (3.25 ± 0.25) mg∙cm
-2
Photomultiplier
Diameter 25 mm with hemispheric window
High voltage source
(400 ÷ 1000) V with sensitive current limitation
Sensitive area of the
detector
(130 x 77) mm = 100 cm
2
(15.5 in
2
)
Window
Aluminized light-tight foil (3 x 0.29) mg∙cm
-2
Protective grid
Hexagonal grid, permeability 77 %
Dead time
Automatically compensated, typically 4.5 μs