teama2024
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| teama2024 [2024/02/27 21:18] – [Some operation] duythanh | teama2024 [2025/02/04 00:28] (current) – nuicise | ||
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| - | ====== Team A - single MPPC (Drafting) | + | ====== Team A - single MPPC ====== |
| + | <color # | ||
| + | * **Alex Sells**, UCL, UK | ||
| + | * **Le Thien Nga**, Fulbright Univ., HCM | ||
| + | * **Tran Quang Anh**, USTH, HN | ||
| + | * **Vo Diep Trung Tin**, HUS-VNU, HCM | ||
| + | * **Vu Quang Minh**, USTH, HN | ||
| + | <color # | ||
| MPPC models: | MPPC models: | ||
| * Operation voltage ~ 54.8V | * Operation voltage ~ 54.8V | ||
| Line 7: | Line 15: | ||
| * MPPC characteristics (noise, noice coincidence, | * MPPC characteristics (noise, noice coincidence, | ||
| * Speed of light in the optical fibers/ Concept of TOF. We need to use very fast optical pulsing for this measurement to get more precise measurement. Will try to use LED-driven Beacon to get a pulse in ~ 2-4ns width | * Speed of light in the optical fibers/ Concept of TOF. We need to use very fast optical pulsing for this measurement to get more precise measurement. Will try to use LED-driven Beacon to get a pulse in ~ 2-4ns width | ||
| - | * Cosmic ray muons: rate, and light yield | + | * Cosmic ray muons: rate, and light yield, and at different zenith angle? |
| ===== Allocated hardwares ===== | ===== Allocated hardwares ===== | ||
| + | {{ : | ||
| * Oscilloscope for signal recording and digitalized | * Oscilloscope for signal recording and digitalized | ||
| * It is connected via Ethernet and allowed to remote control from a PC | * It is connected via Ethernet and allowed to remote control from a PC | ||
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| * Circuit board to be soldered by students, to provide voltage and get the signals | * Circuit board to be soldered by students, to provide voltage and get the signals | ||
| * For LED Beacon, need other DC PS and Analog Discovery as function/ | * For LED Beacon, need other DC PS and Analog Discovery as function/ | ||
| - | * Plastic scintillator and wavelength shifting fiber | + | * Plastic scintillator |
| - | * Optical beam splitter | + | * Optical |
| ===== Some things about MPPC ===== | ===== Some things about MPPC ===== | ||
| ==== Some advantages ==== | ==== Some advantages ==== | ||
| * Low operation voltage (~53V - 70V) | * Low operation voltage (~53V - 70V) | ||
| - | * High multiplication ratio (gain) (1e -> ~10< | + | * High multiplication ratio (gain) (~10< |
| * High photon detection efficiency (up to ~50% at peak sensitivity wavelength) | * High photon detection efficiency (up to ~50% at peak sensitivity wavelength) | ||
| - | * Fast response (a few nanosecond) and good time resolution | + | * Fast response (a few nanoseconds) and good time resolution |
| * Wide spectral response range (wavelength ~270nm - 900nm) | * Wide spectral response range (wavelength ~270nm - 900nm) | ||
| * Not affected by magnetic fields | * Not affected by magnetic fields | ||
| - | * Highly resistant to mechanical shocks, and does not suffer | + | * Highly resistant to mechanical shocks, and does not suffer by incident light saturation |
| - | ==== Some operation ==== | + | ==== Some operation |
| * The structures of all the pixels in an MPPC are the same and every pixel consists of an avalanche photodiode and a quenching resistor | * The structures of all the pixels in an MPPC are the same and every pixel consists of an avalanche photodiode and a quenching resistor | ||
| * When one photon comes to a pixel in the MPPC, it will produce one pulse | * When one photon comes to a pixel in the MPPC, it will produce one pulse | ||
| * If more than one photon are detected by different pixels at the same time, the MPPC output will be a pulse which is a superimposed of the output pulses of those pixels | * If more than one photon are detected by different pixels at the same time, the MPPC output will be a pulse which is a superimposed of the output pulses of those pixels | ||
| + | * The output of a pixel is always one pulse and it does not depend on the number of photons coming to the pixel at the same time | ||
| ==== Reference ==== | ==== Reference ==== | ||
| * MPPC technical note [[https:// | * MPPC technical note [[https:// | ||
| * LED nano beacon [[https:// | * LED nano beacon [[https:// | ||
teama2024.1709093880.txt.gz · Last modified: 2024/02/27 21:18 by duythanh