feat(rpc):Update readme

Author: jose-luis-rs

rpc/README.md

@@ -1,11 +1,46 @@
 # Overview of the Resistive Plate Chamber (RPC) classes
 
-TClonesArray data (typically FairMultiLinkedData)
-Event data on various levels.
+The **RPC detector** consists of **two multigap RPC modules**, each enclosed in a permanently sealed plastic gas-tight box, equipped with feed-throughs for **gas** and **High Voltage (HV)** connections.
 
-Generally in
+## Structure
 
-- ../r3bdata/
+- Each RPC module has **six gas gaps**, defined by **seven 1 mm thick float glass electrodes** (~1550 × 1250 mm²), separated by **0.3 mm nylon monofilaments**.  
+- The HV electrodes are formed by a **semi-conductive layer** applied with airbrush techniques on the outer surfaces of the outermost glasses.  
+- Both modules are read out in parallel by a **readout strip plane** consisting of:
+  - **41 copper strips** (29 mm width, 30 mm pitch, 1600 mm long),  
+  - Located between the two modules.  
+- Two ground planes (top and bottom of the stack) complete the readout system.  
+- The whole structure is enclosed in an **aluminum box** providing:
+  - Electromagnetic insulation  
+  - Mechanical rigidity  
 
+## Readout Electronics
 
+- Strips are read from both sides by **fast Front End Electronics (FEE)** capable of encoding:
+  - **Time** (leading edge) with precision **<30 ps**  
+  - **Charge** (pulse width), obtained via **Time over Threshold (TToT)**  
+    - Integration constant ≈ **100 ns**  
+- Output is handled by a **TDC-and-Readout Board (TRB, version 3)**:  
+  - Equipped with **128 multihit TDC channels** (TDC-in-FPGA technology)  
+  - Time precision better than **20 ps**  
+- Together with a **TRBv3sc** (logic unit and trigger distribution), they form an **autonomous DAQ system** that:  
+  - Exports data  
+  - Synchronizes via **White Rabbit protocol** with the **R3B DAQ system**  
+
+## Operation
+
+- The RPC operates in an **open gas loop** with a mixture of:
+  - **98% C₂H₂F₄**  
+  - **2% SF₆**  
+- Gas pressure: a few millibars below atmospheric pressure  
+  - Atmospheric compression defines the gap width (no mechanical compression required)  
+- Detector working point: ~**3000 kV/gap**  
+
+## Data Structures
+
+Data structures for the **mapped, precal, cal and hit levels** can be found at:
+
+[`../r3bdata/rpcData`](../r3bdata/rpcData)
+
+---
 

rpc/RpcLinkDef.h

@@ -1,8 +1,8 @@
 // clang-format off
 
 /******************************************************************************
- *   Copyright (C) 2019 GSI Helmholtzzentrum für Schwerionenforschung GmbH    *
- *   Copyright (C) 2019-2025 Members of R3B Collaboration                     *
+ *   Copyright (C) 2022 GSI Helmholtzzentrum für Schwerionenforschung GmbH    *
+ *   Copyright (C) 2022-2025 Members of R3B Collaboration                     *
  *                                                                            *
  *             This software is distributed under the terms of the            *
  *                 GNU General Public Licence (GPL) version 3,                *