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LICEO NICOLOSO DA RECCO

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Presentation on theme: "LICEO NICOLOSO DA RECCO"— Presentation transcript:

1 LICEO NICOLOSO DA RECCO
Efficiency measurement of Genoa’s telescope Torino, Marzo 2019 1

2 What we did in Genoa We spent three days collecting data in order to calculate the efficiency of the telescope. 2

3 First setup Coincident Scintillator Chamber Coincident Scintillator 3

4 Voltage cursor 4

5 Data collecting Reset buttons
Each measurement lasted two minutes. After a minimum of 6 measurements we changed the voltage of the chamber. Reset buttons 5

6 Chamber 1 Efficiency = n° events chamber/n° events scintillator
 best range of Voltage 6

7 Chamber 2

8 Chamber 3 Diverso. Ci si aspetta una poissiana dopo i V. Errore perché voltaggio a schermo diverso da quello effettivo 8

9 RESULTS Presuming a 100% efficiency of scintillators: max. efficiency 1° chamber = 0.8  around V max. efficiency 2nd chamber = 0.8  around V max. efficiency 3rd chamber  we should redo the measurement

10 Cosmic π detector In 2016 our school participated at BL4S (Beamline for Schools) competition. As a prize for team short listed we were given the Cosmic Pi detector. (V 1.0) Its dimensions are: 10 cm x 12 cm x 5 cm (6,5cmx6,5cm scintillator)

11 NOISE Noise is any unwanted signal participating in a communication or measure circuit, that tend to confuse the expected signal.

12 VARIABLES In order to verify if any change of the variables could have some influence on the noise, we made several experiments, each time changing the conditions of: Temperature (under a temperature of 13°C the detector seems not to work) Light (we tried to cover the box with different materials) Power source (we tried both with a battery and electric supply) Lead shielding (we tried to reduce the flux of muons by using a lead cube)

13 Lead shielding Thickness: 11 cm ; Weight: 50 kg Without Pb With Pb
Without Pb With Pb Duration (sec) 771 922 Number of EVT 905 1049 Frequency (Hz) 1.1738 1.1377

14 HELP We would like to calibrate our cosmic box using the Genoa’s telescope. Have you had our same problem? If so, have you been able to solve it? Errori nei grafici diversi perché ci sono più o meno misurazioni 14

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