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--- handsonact [2024/03/03 10:18] – [2. Act #2 (1.5h, Tue. Mar.5)] nuicise
+++ handsonact [2024/03/03 11:00] (current) – [5. Act #5 (1.75h, Thu. Mar. 7):] nuicise
@@ Line 17: / Line 17: @@
 ===== 2. Act #2 (1.5h, Tue. Mar.5) =====
-Making the circuit to work with MPPC, LED driving with function generator. Observe signal from sensor with various configuration (intensity, frequency, pulse width..)
+Making the circuit to work with MPPC (group A and C), LED driving with function generator. Observe signal from sensor with various configuration (intensity, frequency, pulse width..)
   * **Group A**
     * Two students go for circuit soldering, the other try to setup and understand functionalities of oscilloscope, control LED/ Nanobeacon
     * Understand the concept of signal coincidence/ difference between using the NIM modules and oscilloscope
   * **Group B**
-    * Measure the noise rate, electric gain, coincidence noise
+    * Measure the noise rate, electric gain (channel-by-channel uniformity)
-    * LED driving and check the signal, check the optical cross-talk (shining on one channel, and check signal from the other channels)
+    * Check the coincidence with two and three channels, referring to the estimated muon rate to come up with a reasonable trigger pattern (to attain relatively high signal-to-ratio)
   * **Group C**
+    * Noise rate of PMT
+    * Signal with MPPC, comparing noise rate of PMT and MPPC
 ===== 3. Act #3 (1.75h, Tue. Mar.5): =====
- MPPC circuit; soldering, testing signal, pedestal; noise mitigation with Faraday cage
+  * **Group A** Test the soldered circuits, noise suppression, noise rate, coincidence rate...(estimate the muon rate on the scintillator and use it for reference)
+  * **Group-B** Optical cross-talk check: shining LED in a specific channel and check the signal of the nearby channels. Justify whether this cross-talk is significant or not.
+  * **Group-C** LED driving with Analog discovery (software is on the allocated PC);  PMT signal vs MPPC signals: check detection efficiency, dynamic range, linearity
 ===== 4. Act #4 (1.75h, Wed. Mar. 6): =====
- Light tightening; MPPC characteristics (noise rate, gain, supply voltage dependence; timing response); measure the speed of light in the optical fibers if having time (concept of light detection and ranging or LiDAR in short); NIM modules to use: disciminator and scaler
+  * **Group A**: setup and measure the speed of light in the optical fiber (convert from timing to distance; refer to the refractive index of the optical fiber)
+  * **Group B**: setup and measure the profile of a light source (eg. from LED transport through an optical fiber. Refer to the so-called numerical aperture of the fiber )
+  * **Group C**: Setup and measure the spectra of the light source with optical filters
 ===== 5. Act #5 (1.75h, Thu. Mar. 7): =====
  Work in combination of Scintillator, wavelength shifting fiber and photosensor; concept of muon counter; NIM modules to use: discriminator, scaler, coincidence (and delay if needed)
+  * **Group A** use scintillator bar; wavelength shifting fiber polishing and glue to be fitted in the optical connector to single MPPC
+  * **Group B** use laser-cutted plate for coupling wavelength shifting fiber to sensor.
+  * **Group C** use scintillator cube; observe signal; check the rate; compare the signal with wavelength shifting fiber
 ===== 6. Act #6 (2.0h, Thu. Mar. 7): =====
- Data taking and analysis
+  *  Check the coincidence rate of muons and see whether it is consistent with what we expect. Try to tighten or loosen the threshold in the trigger pattern and see how the result changed.
+  * Learn how to use DAQ program for automate data taking
+  * Analyze the data. Depend on the group members to decide which programing language and data format to use.
 ===== 7. Act #7 (2.75h, Fri. Mar. 8): =====