1 Gain vs Vmesh 50000 y = 1.196305E-04e 3.300424E-02x y = - PowerPoint PPT Presentation

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Gain vs Vmesh 50000 y = 1.196305E-04e 3.300424E-02x y = 2.541469E-04e 2.812789E-02x Gain Ar:CO2 - 93:7 5000 Ar:CO2 - 80:20 500 450 500 550 600 650 700 Vmesh 2

Ar:CO2 – 80:20 3

Ar:CO2 - 80:20 (Mesh) for high n-rate Gain 2711 100 10 1 Sparks/sec y = 1E-18e 0.0703x 0.1 0.01 0.001 570 580 590 600 610 620 630 640 Vmesh E n =5.5 MeV, neutron flux=1.4x10 6 n/cm 2 s 4

Sparks Ar:CO2 – 80:20 E n =5.5 MeV, neutron flux=0.7x10 5 n/cm 2 s 5 E n =5.5 MeV, neutron flux=1.4x10 6 n/cm 2 s

Ar:CO2 - 80:20 (Strips) Gain 2711.54 100 100 y = 3E-13x 3.1192 10 10 Sparks/sec 1 1 0.1 0.1 0.01 0.01 570 580 590 600 610 620 630 640 Vmesh 6

Spark Rate vs Gain (Ar:CO2 - 80:20) high n-rate (cut=100) 100 10 Sparks/sec Mesh Strips 1 0.1 2000 20000 Gain 7

Spark Rate vs Gain (Ar:CO2 - 80:20) low n-rate (cut=100) 100 10 1 Sparks/sec Mesh Strips 0.1 0.01 0.001 2000 20000 Gain 8

Ar:CO2 – 93:7 9

Ar:CO2 - 93:7 (Mesh) for high n-rate 1465 14650 Gain 100 100 10 10 1 1 Sparks/sec y = 2E-28e 0.1176x 0.1 0.1 0.01 0.01 0.001 0.001 500 510 520 530 540 550 560 570 Vmesh E n =5.5 MeV, neutron flux=1.5x10 6 n/cm 2 s 10

Sparks Ar:CO2 – 93:7 11

Ar:CO2 - 93:7 (Strips) Gain 1465.2 14652 100 100 y = 5E-13x 3.3477 10 10 Sparks/sec 1 1 0.1 0.1 0.01 0.01 500 510 520 530 540 550 560 570 Vmesh 12

Spark Rate vs Gain (Ar:CO2 - 93:7) high n-rate (cut=100) 100 y = 2E-13x 3.3662 10 y = 2E-14x 3.5644 1 Sparks/sec mesh strips 0.1 0.01 0.001 1000 10000 Gain 13

Current vs Voltage 10 1 μ A 0.1 Current 0.01 0.001 14 490 500 510 520 530 540 550 560 570 580

Ar:CO2 – 80:20 Ar:CO2 – 93:7 combined for high and low n-rate 15

Spark Rate vs Gain high n-rate (combined from mesh) 100 10 1 Sparks/sec Ar:CO - 93:7 Ar:CO2 - 80:20 0.1 0.01 0.001 1000 10000 Gain 16

Spark Rate vs Gain high n-rate (combined from mesh) Gain (80:20) 2000 20000 100 100 10 10 1 Sparks/sec (80:20) Sparks/sec (93:7) Ar:CO2 - 93:7 Ar:CO2 - 80:20 0.1 1 0.01 0.001 0.1 1000 10000 Gain (93:7) 17

Sparks Rate vs Gain low n-rate (combined from mesh) Gain (80:20) 2000 20000 10 10 1 1 Sparks/sec (93:7) Sparks/sec (80:20) Ar:CO2 - 93:7 Ar:CO2 - 80:20 0.1 0.1 0.01 0.01 3000 30000 0.001 0.001 Gain (93:7) 18

Energy Resolution Plot (με πηγή Fe55) 19

Plots από MCA με πηγή Σιδήρου και doubleFit με Gauss (10/5/2010) 20

Resolution = FWHM/mean value = 2,35 sigma / mean value 21