1. RESPONSE OF CELLS WITH 3, 4, AND 5 MM THICKNESSES
ALEXANDRE DYCHKANT
11/27/2018
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CELLS AND FIBERS
ALL HEXAGONAL CELLS WITH 9.4 CM² AREA WERE MADE FROM THE
SAME PIECE OF ELGEN TECHNOLOGY CASTING SCINTILLATOR EJ-200
WITH 5.5 MM AVERAGE THICKNESS.
IT WAS EIGHT CELLS IN EACH OF 3.0, 4.0, OR 5.0 MM THICKNESS SET.
THE MACHINED SURFACES WERE NOT POLISHED.
KURARAY, Y-11, 1 MM OUTER DIAMETER, 1 M LONG, MULTICLADDING,
WLS FIBER WITH MIRRORED END WAS USED. FIBERS WERE INSERTED
INTO SIGMA SHAPED WITHIN A 15 MM RADIUS, TAPERED, 1.2 MM WIDE,
RECTANGULAR GROOVES.
AFTER FIRST SET OF MEASUREMENTS, FIBERS WERE GLUED INSIDE
GROOVES WITH BC-600.
CELLS WERE COVERED WITH TYVEK.
2 mC Sr-90 RADIOACTIVE SOURCE, HAMAMATSU R-580 PMT , AND
PICOAMMETER WITH GPIB WERE USED.
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PRELIMINARY
GOALS AND RESULTS
THE MAIN GOALS OF THERE MEASUTEMENTS WERE THE FOLLOWING:
1 WHAT AMOUNT OF LIGHT NEW FIBER CAN PROVIDE?
2 WHAT IS THE DIFFIRENCE IN RESPONSE OF CELL WITH 3(4 OR 5) MM
THICKNESS?
3 WHAT IS THE SPREAD OF RESPONSES?
1 CELLS PROVIDE RESPONSES FROM 1400 nA to 2400 nA.
2 FOR 3 MM CELLS RESPONSE ARE AND nA (1.08);
FOR 4 MM CELLS RESPONSE ARE AND nA (1.10);
FOR 5 MM CELLS RESPONSE ARE AND nA (1.17);
3 THE ARERAGE VALUE OF RATIOS OF CELL RESPONSES AFTER/BEFOR
GLUING IS WITH STANDART DEVIATION 0.074
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PRELIMINARY
SUMMARY
KURARAY Y-11, 1 MM OUTER DIAMETER, MULTICLADDING WLS FIBER
PROVIDES THE LARGEST RESPONSE;
FOR THESE CELLS THE 3, 4 AND 5 MM THICKNESSES RESPONSES ARE
SIMILAR;
GLUING PROVIDES ADDITIONAL 14% TO RESPONSE OF THE CELL;
GLUING PROVIDES ADDITIONAL SPREAD OF RESPONSES BECAUSE OF
AIR BUBLES BETWEEN FIBER AND GROOVE WALL WHERE GLUE CAN
NOT PENETRATE.
11/27/2018
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