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--- teamc2024 [2024/03/04 08:35] – [Three main objectives] nuicise
+++ teamc2024 [2024/03/05 02:38] (current) – [Details of measurements] nuicise
@@ Line 29: / Line 29: @@
     * Check the spread of scintillation light induced by the mostly cosmic-ray muons
+===== Details of measurements =====
+  - PMT/MPPC characteristics, focusing on the noise/ rising time and falling time
+    * 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: it's better with LED, to reduce the effect of the electric noise
+    * Sensitivity: lower down the light intensity
+    * 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 =====
   * PMT voltage supply <15V and for gain control <1V
@@ Line 35: / Line 53: @@
   * Light tightening is supper important for PMT (than for MPPC).
   * Be gentle when dealing with optical fibers
+  * There is some electronic noise induced by other equipment/source in the room
+    * 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
@@ Line 52: / Line 77: @@
   * Photomultiplier Tubes: Basics and Applications [[https://www.hamamatsu.com/content/dam/hamamatsu-photonics/sites/documents/99_SALES_LIBRARY/etd/PMT_handbook_v4E.pdf]]
   * MPPC technical note [[https://hub.hamamatsu.com/content/dam/hamamatsu-photonics/sites/static/hc/resources/TN0014/mppc_kapd9005e.pdf]]
+  * PMT H6780-01 specification [[https://ifirse.icise.vn/nugroup/docs/hardware/manual/H6780-04.pdf]]