*** Simulation Dataset for MIDAS detector (Protons, He4, C12, N14, O16, Si28, Ca40, Ti48, Fe56) ***
Authors: K. Karafasoulis
ADVEOS Microelectronic Systems PC, Chalandri, 15231, Attiki, Greece.

Corresponding author: K. Karafasoulis

Contact Information: ckaraf@gmail.com 

ADVEOS Microelectronic Systems PC, 
Tsitouri 44,
Chalandri, GR-15231, 
Attiki, 
Greece.

***General Introduction***
 
This dataset contains simulated data generated using the GATE software based on the GEANT4 framework. During the simulation, a model of the MIDAS 
detector, a depleted monolithic active pixel sensor array for charged particle measurement in space,  has been irradiatted with Protons and the ions: 
He-4, C-12, N-14, O-16, Ne-20, Si-28, Ca-40, Ti-48, Fe-56. The response of the detector (energy depositions) has been recorded into ROOT files. 
The data in the ROOT files has been processed in order to estimate the variables of interest and the output has been saved in ROOT tree files, which make the current dataset.      

The dataset contained ten (10) files, one for each ion species,  which can be opened with the ROOT software (http://root.cern.ch)
 
It is being made public to act as supplementary data for publications.

This work was funded by the European Space Agency Contract 4000119598/17/NL/LF for the development of a highly miniaturized ASIC radiation detector.

*** Methodological information ***

A detailed geometrical Model for the MIDAS detector has been constructed. This model served as input for the GATE simulation software. The following 
particles/ions: Protons, He-4, C-12, N-14, O-16, Ne-20, Si-28, Ca-40, Ti-48, Fe-56 have been used as the radiation source, with GCR spectra produced with OMERE.
The output of the GATE simulation was saved in GATE's defalult tree files in ROOT format. These tree files have been processed using custom software in order to 
estimate the variables of interest such as the energy and location  of the energy clusters. The output of this processing is the data provided with the current dataset.     


***Description of the data in this data set*** 
 
The following variables are included in the ROOT files provided with the current dataset.  
- Variables which are noted as Variable[10] are one dimenstional arrays, with the index being the Si layer number 
- Variables which are noted as Variable[10][4] are two dimenstional arrays with te first index to be the layer number (0-9), while the second index the ASIC number (0-3)
 
    Event : Event ID number
    NHits : Number of energy hits in the event
    iLayer: Layer of the 1st interaction 
    iASIC : ASIC of the first interaction
    AtomicNumber : Atomic Number of the incident particle 
    Mass : Mass number of the incident particle 
    ParentID : ID of the Parent Track
    Ekine : Energy of the incident particle in Mev 
    Edep  : Total deposited energy of the current event in MeV
    SiEdep[10]: Deposited energy in one of the ten Si layers of the MIDAs detector in MeV
    ClusterEnergy[10]: Energy of the Cluster in each Si layer  
    ClusterX[10]: X position if the cluster's barycenter per Si layer 
    ClusterY[10]: Y position if the cluster's barycenter per Si layer
    ClusterZ[10]: Z position if the cluster's barycenter per Si layer
    SiVolumesSeen[10][4]: Number of Hits in each ASIC
    EntryPixel[10][4]: Entry Pixel in each ASIC
    EntryPixelEdep[10][4]: Deposited energy of the Entry Pixel of each ASIC
    EntryPixelDirX[10][4]: X directional cosine of the entry pixel's track 
    EntryPixelDirY[10][4]: Y directional cosine of the entry pixel's track
    EntryPixelDirZ[10][4]: Z directional cosine of the entry pixel's track
    EntryPixelPosX[10][4]: X Position of the entry pixel 
    EntryPixelPosY[10][4]: Y Position of the entry pixel 
    EntryPixelPosZ[10][4]: Z Position of the entry pixel 
    N1Edep[10][4]:  Deposited Energy of the entry pixel's 1st pixel neighbors 
    N2Edep[10][4]:  Deposited Energy of the entry pixel's 2nd pixel neighbors