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feat(rpc):Update readme
Minor changes Co-authored-by: ManuelXarepe <mxarepe@lip.pt>
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‎rpc/CMakeLists.txt‎

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##############################################################################
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# Copyright (C) 2022 GSI Helmholtzzentrum für Schwerionenforschung GmbH #
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# Copyright (C) 2022-2025 Members of R3B Collaboration #
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# Copyright (C) 2021 GSI Helmholtzzentrum fur Schwerionenforschung GmbH #
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# Copyright (C) 2021-2025 Members of R3B Collaboration #
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# #
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# This software is distributed under the terms of the #
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# GNU General Public Licence (GPL) version 3, #

‎rpc/README.md‎

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

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// clang-format off
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/******************************************************************************
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* Copyright (C) 2019 GSI Helmholtzzentrum für Schwerionenforschung GmbH *
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* Copyright (C) 2019-2025 Members of R3B Collaboration *
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* Copyright (C) 2021 GSI Helmholtzzentrum fur Schwerionenforschung GmbH *
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* Copyright (C) 2021-2025 Members of R3B Collaboration *
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* *
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* This software is distributed under the terms of the *
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* GNU General Public Licence (GPL) version 3, *

‎rpc/sim/R3BRpc.cxx‎

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/******************************************************************************
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* Copyright (C) 2019 GSI Helmholtzzentrum für Schwerionenforschung GmbH *
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* Copyright (C) 2019-2025 Members of R3B Collaboration *
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* Copyright (C) 2022 GSI Helmholtzzentrum fur Schwerionenforschung GmbH *
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* Copyright (C) 2022-2025 Members of R3B Collaboration *
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* *
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* This software is distributed under the terms of the *
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* GNU General Public Licence (GPL) version 3, *
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#include "R3BRpc.h"
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#include "R3BRpcPoint.h"
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#include "TClonesArray.h"
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#include "TGeoManager.h"
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#include "TVirtualMC.h"
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#include <TClonesArray.h>
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#include <TGeoManager.h>
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#include <TVirtualMC.h>
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R3BRpc::R3BRpc()
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: R3BRpc("")
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gMC->CurrentEvent());
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// Increment number of RpcPoints for this track
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R3BStack* stack = dynamic_cast<R3BStack*>(gMC->GetStack());
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auto* stack = dynamic_cast<R3BStack*>(gMC->GetStack());
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stack->AddPoint(kRPC);
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ResetParameters();
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}
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return kFALSE;
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}
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ClassImp(R3BRpc);
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ClassImp(R3BRpc)

‎rpc/sim/R3BRpc.h‎

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/******************************************************************************
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* Copyright (C) 2019 GSI Helmholtzzentrum für Schwerionenforschung GmbH *
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* Copyright (C) 2019-2025 Members of R3B Collaboration *
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* Copyright (C) 2022 GSI Helmholtzzentrum fur Schwerionenforschung GmbH *
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* Copyright (C) 2022-2025 Members of R3B Collaboration *
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* *
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* This software is distributed under the terms of the *
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* GNU General Public Licence (GPL) version 3, *
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* or submit itself to any jurisdiction. *
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******************************************************************************/
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#ifndef R3BRPC_H
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#define R3BRPC_H 1
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#pragma once
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#include "R3BDetector.h"
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#include "Rtypes.h"
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#include "TLorentzVector.h"
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#include <Rtypes.h>
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#include <TLorentzVector.h>
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class TClonesArray;
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class R3BRpcPoint;
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fTime = fLength = fELoss = 0;
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fPosIndex = 0;
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};
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#endif /* R3BRPC_H */

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