Some characteristics of the extruded scintillator. 10/24/2019 Some characteristics of the extruded scintillator. Victor Rykalin Victor Rykalin

Content Introduction The results of measurements Summary 10/24/2019 Victor Rykalin

Introduction We are doing very well ! 10/24/2019 Victor Rykalin

Introduction part, some useful information We have 100*5mm^2 of 6 m long profile for analysis. Mechanical measurements (we did before, NICADD measurements). Light output uniformity (within one cell, WSU measurements). Light output measurements(over 6 m scintillator profile, FNAL-NICADD measurements). Light output measurements (comparison to cast scintillator, FNAL-NICADD measurements) 10/24/2019 Victor Rykalin

Mechanical measurements The result is based on P. Torres NICADD activity. 4.78  0.03 mm 20 cm 44 m 10/24/2019 Victor Rykalin

Light output uniformity of FNAL-NICADD scintillator (WSU measurements) 50 mm 50 mm Sr 90, 2 mm coll., 8 mm step, 56 points, sigma grooved fiber of =0.83 mm. Sigma ~ 2.2 % FNAL- NICADD 10/24/2019 Victor Rykalin

100*5 mm^2 scintillator 1. 2. 3. 4. Cells measurements How the measurements were performed ? 100*5 mm^2 scintillator 1. 2. 3. 4. Cells measurements Fluorescence measurements Light output measurements and selection of the scintillator for the cell fabrication Cells production, no wrapping. 10/24/2019 Victor Rykalin

Light output uniformity, 6 m. Bi 207 e- 0.975 MeV 7% kj 0.481 MeV 2% kikkkkjkjkj 1.047 MeV 2% 10/24/2019 Victor Rykalin

The results, uniformity over 6 m Each sample is 6 pieces of scintillator 19*19 mm^2 269.4  7.7 (~ 3%) 10/24/2019 Victor Rykalin

Distribution 10/24/2019 Victor Rykalin

Uniformity over 1 sample 10*10 cm^2 269 255 263.0  6.6 (~2.5 %) 10/24/2019 Victor Rykalin

The results, relative light output normalized to the 1 mm of scintillator thickness, bulk measurements, Ru106 BC404 3.25  0.22 BC408 2.70  0.15 F-NICADD 2.01  0.30 (~66% of BC408) averaged over 10 samples 10/24/2019 Victor Rykalin

Summary. When the extruder works properly for the scintillator bulk we have…. Thickness  ~ 0.6 % (4.78 mm) Uniformity LY  ~ 2.2 % (5*5 cm2 ) Uniformity LY  ~ 3 % (over 6 m) Uniformity LY  ~ 2.5 % (10*10 cm2) Light output 66 % of BC408 This is a starting point ! 10/24/2019 Victor Rykalin