teamc2024
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| teamc2024 [2024/03/04 08:34] – [Three main objectives] nuicise | teamc2024 [2024/03/05 02:38] (current) – [Details of measurements] nuicise | ||
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| * Better to use fiber splitter with one signal is used to control the light source stability | * Better to use fiber splitter with one signal is used to control the light source stability | ||
| * Cosmic ray muons measurement (rate, light yield) with plastic scintillator cubes | * Cosmic ray muons measurement (rate, light yield) with plastic scintillator cubes | ||
| + | * Estimate the rate of cosmic ray muon in the cube | ||
| + | * From that estimate the threshold needed for the rate of coincidence | ||
| + | * Check the spread of scintillation light induced by the mostly cosmic-ray muons | ||
| + | ===== Details of measurements ===== | ||
| + | - PMT/MPPC characteristics, | ||
| + | * PMT at different level (but what is the level of single photon)? Can we identify it? | ||
| + | * For MPPC, noise rate at different threshold (.5PE, 1.5PE, 2.5PE) with different operation voltage 56V, 57V, 58V | ||
| + | * Due to some electric RF noise, we may want to operate at higher voltage to get more gain, allowing us to set up higher threshold to remove the electric RF noise | ||
| + | * Rising time and falling time measurement: | ||
| + | * Sensitivity: | ||
| + | * Dynamic range: increasing the light intensity and measure the intensity | ||
| + | - Spectra measurement of the white LED | ||
| + | - Observe with diffraction grating with high intensity/ take photo with camera (eg. smartphone) | ||
| + | - Measure with different LED setting with three setup of optical filter | ||
| + | - No filter | ||
| + | - FGL400nm | ||
| + | - FGL455nm | ||
| + | - FGL570nm | ||
| + | - Cosmic ray measurement | ||
| + | * Using scintillator cube/ (1) one cube (2) two cube, one to read with PMTs, one to read with MPPC; for MPPC, one can use wavelength shifting fiber | ||
| + | * How many photons are collected by MPPC/WLS and how many collected by PMT? | ||
| ===== Important notes ===== | ===== Important notes ===== | ||
| * PMT voltage supply <15V and for gain control <1V | * PMT voltage supply <15V and for gain control <1V | ||
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| * Light tightening is supper important for PMT (than for MPPC). | * Light tightening is supper important for PMT (than for MPPC). | ||
| * Be gentle when dealing with optical fibers | * Be gentle when dealing with optical fibers | ||
| + | * There is some electronic noise induced by other equipment/ | ||
| + | * Estimate the rate | ||
| + | * Check the amplitude signal | ||
| + | * Some methods | ||
| + | * Put higher threshold, also meaning that you will ignore events with low signal | ||
| + | * Use light source from LED, you know when the light will come | ||
| + | * Use coincidence technique when measuring with muons | ||
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| * Photomultiplier Tubes: Basics and Applications [[https:// | * Photomultiplier Tubes: Basics and Applications [[https:// | ||
| * MPPC technical note [[https:// | * MPPC technical note [[https:// | ||
| + | * PMT H6780-01 specification [[https:// | ||
teamc2024.1709566446.txt.gz · Last modified: 2024/03/04 08:34 by nuicise