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Feature #1411

KL MC

Added by Rajaram, Durga over 7 years ago. Updated over 7 years ago.

Status:
Open
Priority:
Normal
Category:
-
Target version:
Start date:
07 February 2014
Due date:
% Done:

0%

Estimated time:
Workflow:
New Issue

Description

KL MC

Need simulation of KL detector in MAUS.

Geometry

  • description exists in legacy geometry
  • are the material definitions and internal geometries correct?

Hits

  • there is some legacy code for the sensitive detector in src/legacy/DetModel/KL/ -- needs to be checked/modified
  • add KLChannelId and typedef KLHit [ src/common_cpp/DataStructure ]
  • add KLChannelIdProcessor [ src/common_cpp/JsonCppProcessors ]

Digitization

  • digitize GEANT hits - add src/map/KLMCDigitizer
  • check data structure [ src/common_cpp/DataStructure/KLDigit.xx ]

Reconstruction

  • reconstruction code exists
  • the reconstruction [ MapCppKLCellHit ] should treat MC digits same way as it does digits from real data

Tests

  • unit tests
  • integration tests to validate simulation+reconstruction chain

Documentation

  • add TeX documentation

Files

simulate_kl.log (26.1 KB) simulate_kl.log kl digitizer log Rajaram, Durga, 11 March 2014 15:38
kl_mcreco.png (12.6 KB) kl_mcreco.png kl mc pions Rajaram, Durga, 19 March 2014 15:39
kl_pie.png (9.1 KB) kl_pie.png kl mc pi vs e Rajaram, Durga, 19 March 2014 15:39
#1

Updated by Rajaram, Durga over 7 years ago

The KL digitizer crashes on some events:

python bin/user/simulate_kl.py --simulation_geometry_filename=Stage4.dat

Full log attached.

..
#6  0x00007fe9b0882345 in MAUS::MapCppKLCellHits::fillCellHit(Json::Value, Json::Value) () from /home/durga/trunk-debug/build/_MapCppKLCellHits.so
#7  0x00007fe9b08831cc in MAUS::MapCppKLCellHits::makeCellHits(Json::Value) () from /home/durga/trunk-debug/build/_MapCppKLCellHits.so
#8  0x00007fe9b0883ac6 in MAUS::MapCppKLCellHits::process(std::basic_string<char, std::char_traits<char>, std::allocator<char> >) () from /home/durga/trunk-debug/build/_MapCppKLCellHits.so
#9  0x00007fe9b0888d77 in _wrap_MapCppKLCellHits_process () from /home/durga/trunk-debug/build/_MapCppKLCellHits.so
#10 0x00007fe9c92aa894 in ext_do_call (f=<value optimized out>, throwflag=<value optimized out>) at Python/ceval.c:4323
#11 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at Python/ceval.c:2705
..
#2

Updated by Rajaram, Durga over 7 years ago

Mariyan,

The crash is happening because of a division by zero in MapCppKLCellHits, line: 210-211

xDocCellHit["charge_product"] = 2 * xChargeDigit0 * xChargeDigit1 / (xChargeDigit0 + xChargeDigit1);

I fixed this by setting the charge_product to 0 if (xChargeDigit0 + xChargeDigit1) == 0
I'll push that if you think that's reasonable.

The question though is why the MC digitizer is giving some digits of 0 -- very low energy deposit+smearing round down?

#3

Updated by Bogomilov, Mariyan over 7 years ago

Thanks Durga,

please push it. I was not able to investigate it until now. I'll try to see what is going on in details.

#4

Updated by Rajaram, Durga over 7 years ago

Ok great, thanks!
FYI, if you find it useful, I have attached some plots from naive quick simulations I ran

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