NOvA Detector Technology
NOvA Detector Technology
NOvA Detector Technology
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Gain M<br />
Tests of APDs<br />
200<br />
180<br />
A1 A2 A3 A4 A5 A6 A7 A8<br />
B1 B2 B3 B4 B5 B6 B7 B8<br />
C1 C2 C3 C4 C5 C6 C7 C8<br />
D1 D2 D3 D4 D5 D6 D7 D8<br />
160<br />
140<br />
120<br />
100<br />
APD #14 @ -15 ºC<br />
M = 100<br />
80<br />
60<br />
40<br />
Gain vs. Bias Voltage<br />
20<br />
0<br />
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440<br />
V<br />
450<br />
440<br />
APD #16<br />
APD #17<br />
APD #18<br />
APD #19<br />
Bias V drops ~0.8 V/ºC cooling<br />
430<br />
VR @ =100<br />
010, Santa Fe<br />
420<br />
410<br />
400<br />
390<br />
3.20E-03 3.30E-03 3.40E-03 3.50E-03 3.60E-03 3.70E-03 3.80E-03 3.90E-03 4.00E-03<br />
Inv. Temperature (K -1 )<br />
Gain=100 bias voltage linear vs. temperature<br />
• Measured average QE with RMS<br />
spread across 32 channels<br />
• Average across all channels (84.8<br />
± 2.5)% - expected 85%<br />
Jarek Nowak, September 17, 2010
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