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A strategy for the Limadou HEPD event reconstruction
Francesco Maria Follega1
International School of Space Science 2017 - L’Aquila
June 15, 2017
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 1 / 6
The Limadou HEPD detector
The Limadou HEPD is the high energy particle detector of the CSES and has beendesigned to maximize the sensitivity in the energy range 3 MeV - 100 MeV for theelectrons and 30 MeV - 200 MeV for protons. The information is provided by severalsubsystems:
From the top:
Tracker: two planes of double-sided siliconmicrostrip (0.3 mm thick);
Trigger: one plastic scintillator (0.5 cmthick);
Calo: 16 scintillator planes (1 cm thick)and an array of LYSO crystals.
Around:
Veto: 5 scintillator planes.
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 2 / 6
Limadou event reconstruction architecture
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 3 / 6
Tracker reconstruction of dEdx , θ and PID
The reconstruction of the silicontracker information provides:
the energy loss ( dEdx
);
a standalone PID;
the angle θ (see next talk);
each event.
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 4 / 6
Calorimeter energy reconstruction
The information reconstructed bythe plastic scintillator calorimeterprovides:
an estimation of the energy Ereleased by the particle;
topological information (i.epenetration of the particle).
each event.
Credits: V.Vitale
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Conclusion and Outlooks
The Limadou HEPD event reconstruction team is working hard in preparation for thelaunch (16th August). To summarize:
Done:
1 passage from L0 to L1;
2 reconstructionof dE
dxppreliminaryq;
3 reconstruction of theenergy E (preliminary);
4 reconstruction of theangle (preliminary).
Under commissioning:
1 more and more reliableprocedure for E, dE
dxand
θ estimation;
2 mixed trackingalgorithm betweencalorimeter and tracker;
3 passage from L1 to L2(almost done).
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
Backup
Backup slides
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
Level0 Ñ Level1 - What changes?
At Level0 of data elaboration we have
information on raw count;
metadata, flags and index.
At Level1 the information is moredigested and classified :
cluster formed by group ofactivated strips;
calibrated counts for scintillator;
S{N ratios for all the subdetectors;
more metadata and flags.
Lvl0
Lvl1
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
Backup - Tracker dEdx reconstruction
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
Backup - Tracker dEdx LUT
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
Backup - Muon point
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
Backup - Limadou main characteristics
Francesco Maria Follega A strategy for the event reconstruction - ISSS 2017 June 15, 2017 6 / 6
