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MC Detector Construction

MC team member

IHEP Beijing



  • 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)
  • 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
  • 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).

13.png.png STK-1.bmp


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.


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.

Selection_220.png 123.png

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


1) side STK: 1330*665*253mm

2) top STK: 1330*1330*253mm

18.png.png Selection_221.png


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.

In the present simulation, the combination of strips is represented by a flat plate with a thickness of 2cm.

the top view and side view of the PSD are also shown in figure 6 and figure 7.


1) side PSD: 170*110*2cm

2) top PSD: 177*177*2cm

16.png.png Selection_222.png

For more details, please see the source file in the attachment.



-- xu ming - 2017-01-10


Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng 123.png r1 manage 15.5 K 2017-01-10 - 11:28 JunJingWang  
PNGpng 13.png.png r1 manage 50.6 K 2017-01-10 - 11:22 JunJingWang  
PNGpng 16.png.png r1 manage 21.2 K 2017-01-10 - 11:30 JunJingWang  
PNGpng 18.png.png r1 manage 20.1 K 2017-01-10 - 11:29 JunJingWang  
PNGpng CALO.png_(copy).png r1 manage 8.7 K 2017-01-10 - 11:26 JunJingWang  
Unknown file formatcc DetectorConstruction.cc r3 r2 r1 manage 23.8 K 2017-01-10 - 12:20 JunJingWang  
Unknown file formathh DetectorConstruction.hh r3 r2 r1 manage 0.7 K 2017-01-10 - 12:20 JunJingWang  
Unknown file formatgz HERD.tar.gz r2 r1 manage 123.4 K 2017-01-17 - 13:20 JunJingWang  
Bitmapbmp STK-1.bmp r1 manage 2174.6 K 2017-01-10 - 11:26 JunJingWang  
PNGpng Selection_220.png r1 manage 9.3 K 2017-01-10 - 11:27 JunJingWang  
PNGpng Selection_221.png r1 manage 15.8 K 2017-01-10 - 11:29 JunJingWang  
PNGpng Selection_222.png r1 manage 14.7 K 2017-01-10 - 11:31 JunJingWang  
Bitmapbmp 渚ч潰STK-1.bmp r1 manage 2174.6 K 2017-01-10 - 11:25 JunJingWang  
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Topic revision: r7 - 2017-01-17 - JunJingWang
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