Differences

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--- front-end:start [2019/01/31 12:03] – himuser
+++ front-end:start [2022/01/14 18:44] (current) – external edit 127.0.0.1
@@ Line 3: / Line 3: @@
 {{ :front-end:fe.png?400 |}}
-The physics event, marked as a dot creates an electromagnetic shower inside the PbWO_4 crystal and light is produced. This light is detected by APDs (Avalanche Photodiodes). (Two APDs with a detection surface of 7x14 mm^2 are used per crystal.) The APDs create a charge proportional to the detected light. This charge is linearly converted to a voltage pulse by the so called APFEL (ASIC for PANDA Front End Electronics)
+The physics event, marked as a dot creates an electromagnetic shower inside the PbWO_4 crystal and light is produced. This light is detected by APDs (Avalanche Photodiodes). (Two APDs with a detection surface of 7x14 mm^2 are used per crystal.) The APDs create a charge proportional to the detected light. This charge is linearly converted to a voltage pulse by the so called [[front-end:apfel|APFEL]] ((ASIC for PANDA Front End Electronics)). Before getting to the 10 m distant ADC (analogue to digital converter), the analogue signal needs to be amplified. This is done by the use of the line driver.
+After the digitisation of the signal a Sampling ADC a feature extraction (FE) is applied and the data aquisition (DAQ) can be started.