NEW CELLS RESPONSES

1
NEW CELLS RESPONSES
ALEXANDRE DYCHKANT, PETER TORRES
2
GEOMETRY OF CELLS
3MM (3.28) EJ-200 REGULAR HEXAGON
4MM (3.80) EJ-200 REGULAR HEXAGON
5MM (5.51) EJ-200 REGULAR HEXAGON
3MM EJ-200 REGULAR HEXAGON 6CM²
5MM EJ-200 SQUARE 6CM²
5MM EJ-200 SQUARE 9CM²
5MM (4.85) EXTRUDED REGULAR HEXAGON
3
SQUARE, 0.8 MM SIDE, 1 M LONG BCF92 WLS FIBERS
WITH MIRRORED END WERE GLUED INSIDE THE SIGMA
SHAPE TAPERED GROOVE USING EJ-200 OPTICAL GLUE 2
mC Sr90 RADIOACTIVE SOURCE AND HAMAMATSU PMT R580
WERE USED
4
VERY PRELIMINARY
RESPONSE OF CELLS MADE FROM ELJEN TECHNOLOGY
SCINTILLATOR
3 mm 4 mm 5 mm 5/6 cm Sq 5/6 Sq 5/9 Ext 5 Com
448.6 15.3 423.4 14.5 380.2 28.4 444.6 34.3 446.4 42.5 356.3 19.1 288.6 20.8 Bef glu
478.1 491.9 515.3 454.3 502.2 409.1 330.5 Glu tyvek
Glu paint
Glu
5
RATIO OF RESPONSES AFTER/BEFOR GLUING
3 mm 4 mm 5 mm 5/6 cm Sq 6/5 Sq 9/5 Ext 5
1.04 0.95 1.05 1.14 0.95 1.12 1.16 1.14 1.06 1.35 1.08 1.12 1.16 1.07 1.24 1.24 1.13 1.30 1.29 1.58 1.41 1.26 1.20 1.44 1.41 1.37 1.27 1.39 1.10 1.03 1.07 1.00 0.95 1.05 0.91 0.91 1.08 1.09 1.19 1.27 1.13 1.51 1.32 1.06 1.09 1.05 1.16 1.49 0.77 1.29 1.13 1.36 1.40 1.20 0.75 0.88 1.06 1.19 1.06 1.18 1.05 1.21 1.30 1.06 1.36 1.02
6
COMENTS
THERE WERE EIGHT FIBERS WHICH WERE REPLACED BEFOR
GLUING BECAUSE OF MULTIPLE CRACKS THE RED
NUMBERS IN THE TABLE ARE THE CELLS, WHICH HAVE
FIBERS WITH CRACKS THE VISUAL INSPECTION WITH
RED LASER CONFIRMED THIS, ACTUALLY ONLY BLUE
NUMBERS IN THE TABLE PROVIDE THE NORMAL
RESPONSES, HEXAGONAL SHAPED, 5 MM THICKNESS, AND
9.4 CM² AREA CELL HAS THE BEST RESPONSE THE VERY
WIDE SPREADE OF RESPONSES IS THE RESULTE OF
MULTIPLE CRACKS OF FIBER CLADING AND MAYBE
OPTICAL GLUE.
7
BICRON GLUE BC-600 VS ELJEN EJ-500
EIGHT SQUARE CELLS WITH 9.4 CM² AREA AND
DIAGONAL HOLL WERE MADE FROM 5 MM THIKNESS
NICADD EXTRUDED SCINTILLATOR, 0.94 MM OUTER
DIAMETER, 57 CM LONG KURARAY Y-11 WLS FIBERS
WITH MIRRORED END WERE GLUED INSIDE THE CELLS
HOLL, IT WAS TWO SETS OF FOUR CELLS FOR EACH
TYPE OF OPTICAL GLUE, RADIOACTIVE SOURCE Sr90
AND HAMAMATSU PMT R580 WERE USED, THE ARERAGE
RESPONSE FOR BC-600 WAS 692.7 nA, THE ARERAGE
RESPONSE FOR EJ-500 WAS 692.9 Na, EJ-500
PROVIDED THE SAME RESPONSE AS BC-600, BUT LESS
COST.