SCINTILLATING FACEPLATES: SELECTED PERFORMANCE DATA
Faceplate consists of fused 10-micron fibers in a structure
50mm square by 6mm thick, with 12% statistical EMA

Relative Output of Various Configurations at Different Energies 
Plate Type                                       25kV    50kV    100kV   150kV
                            Raw Data (ADU)
Scintillating Faceplate                            98     164     483     671
Scintillating Faceplate with Mirror on Input      154     258     761    1057
Scintillating Faceplate with Lanex on Input       168     360     851    1115
Hybrid Scint. Faceplate w/ GADOX:Eu Phosphor      556    1143    2175    2468
Lanex Fine Intensifier Screen                     260     444     759     811

                            Normalized Data
Scintillating Faceplate: Basis of Normalization   1.00   1.00    1.00    1.00
Scintillating Faceplate with Mirror on Input      1.57   1.57    1.58    1.58
Scintillating Faceplate with Lanex on Input       1.71   2.20    1.76    1.66
Hybrid Scint. Faceplate w/ GADOX:Eu Phosphor      5.67   6.97    4.50    3.68
Lanex Fine Intensifier Screen                     2.65   2.71    1.57    1.21

Comparative Resolution Data (Measured at 50kV)
                                                                                                                      LP/mm, Max.
Scintillating Faceplate                                                                                             18
Scintillating Faceplate with Mirror on Input                                                             19
Scintillating Faceplate with Lanex on Input                                                              15
Hybrid Scint. Faceplate w/ GADOX:Eu Phosphor                                                  13
Lanex Fine Intensifier Screen                                                                                  14

Source of Data: Dr. Clifford Bueno, Lockheed Martin



Absorption Efficiency as a Function of Energy 
Beam filtered by 6mm Aluminum 
              Fiber Optic      GOS screen
Energy         12mm thick    0.15mm thick
 (keV)            Percent         Percent
   50                 100              38
  100                  99              33
  150                  97              27
  200                  95              23
  250                  93              20
  300                  90              18
  350                  87              17
  400                  83              15
Source: Dr. Clifford Bueno, Lockeed, Martin


Comparative Conversion Efficiency 

                 Light Photons per Absorbed X-Ray Photon
                          @ 50 kV     @ 20 kV
Screen Type
Lanex                        1634         486
Min-R                         590         208
Scintillating Fiber Optic      88          33

Source: Dr. Hans Roehrig, University of Arizona

Other Characteristics 
Core Material: LKH-6 glass, 1.58 refractive index 
Clad Material: Borosilicate glass, 1.48 refractive index 
Effective Z of core glass = 31 
Emission Peaks: 545 & 555 nanometers 
Reversible radiation browning after 107 rads