MC Detector Construction

MC team member

IHEP Beijing

• Junjing Wang (wangjunjing@ihep.ac.cn) , (CALO+STK+PSD) overall layout
• Ming Xu (mingxu@ihep.ac.cn), CAD to gdml
• Zheng Quan (quanzheng@ihep.ac.cn), CALO digitization, test beam simulation

Status

available

• simply a pile of LYSO crystals (without mechanical) to study the performance of CALO (by both GEANT4 and FLUKA)
• simple CALO + "big plate" multi-layers of STK to estimate acceptante (GEANT4)
• LYSO crystal + WLSF to study the optical process (GEANT4)
• ICCD including its sub-systems (some optical sw)
• 2015 CALO prototype (GEANT4)
• octagon CALO (GEANT4)
• simple CALO + TRD to study the feasibility of in-flight X-calibration for proton at 1-10TeV (GEANT4)

developing

• octagon CALO + STK + PSD layout to study the coverage rate, trigger strategy and trigger rate (GEANT4)
• main frame of the payload, mechanical stucture for each of the sub-detectors (CAD to GEANT4)
• description for the 2017 test beam prototype

future

• CSS and joint decription with HERD payload
• real "STK"
• ...

Current overall layout

The basic design is shown below.

1) the green part means crystal array(CALO);

2) the blue and pink box represent side and top silicon tracker(STK) respectively;

3) the yellow and red box represent side and top plastic scintillator detector(PSD).

CALO

The center calorimeter consists of 7497 LYSO crystals. Its X-Y projection( top view) is shown is Figure 1.

The detector is divided into 21 layers along the X direction. the gap size between crystals in x direction is 8mm.

the crystal gap is 4mm in the y and z directions.

The carbon fiber(CF) structure between the crystals is not included in the simulation.

STK

In this version, the top and side stk module include 12 ladders(6 x&y layers).

(recently, the number of the side stk layers is reduced to 3.)

the gap size between adjacent x-y ladder is 6mm, and the gap between layers is 31mm (CF support structure).

For simplicity, each x&y layer is represented by a flat plate in simulation, and its thickness is 6mm.

(see Figure 2,3)

the read dashed line in figure 2 means the outer CF structure of the stk.

the top view and side view of the STK are also shown in figure 4 and figure 5.

Size：

1) side STK: 1330*665*253mm

2) top STK: 1330*1330*253mm

PSD

The PSD system consists of many scintillating strips (1cm thick, 12cm wide). The length of the strip is related to the size of the internal detector.

TRD

-- xu ming - 2017-01-10

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