# Dark Matter signal search. Episode 2. — Data

来源：https://www.kaggle.com/competitions/dark-matter-signal-search-episode-2/data

本地 Meta Kaggle 快照；不是本次实时页面。

# Dataset Description

<p>OPERA detector consists of several huge layers of special sensitive blocks *).</p>
<p><img src="https://storage.googleapis.com/kaggle-media/competitions/inclass/6944/media/opera_2d.png" alt="OPERA overall" width="600" height="346" /></p>
<p>Each layer is constructed as a wall of a special sandwich-like detection modules, called bricks *):</p>
<p><img src="https://storage.googleapis.com/kaggle-media/competitions/inclass/6944/media/opera_ecc_scanning.png" width="400" height="301" /></p>
<p>Such bricks interleave lead with photo emulsion. So as neutrino goes through the brick, it may interact with the lead and produce shower-like patterns, that are described by coordinates and angles of the initial particle and the collection of tracks that belong to the shower. The signal sample consists of simulated events. To obtain background sample the emulsion plates has been exposed to cosmic rays during creation, transportation, etc. Such traces which are mostly random is the main source of the background. </p>
<h2>File descriptions</h2>
<ul>
<li><strong>DS_2_train.csv</strong> - the training set</li>
<li><strong>DS_2_test.csv</strong> - the test set</li>
</ul>
<h2>Data fields in training/test sets</h2>
<p>training/test samples </p>
<ul>
<li><strong>Id</strong> - ID of a track</li>
<li><strong>X</strong> - X coordinate of the track start</li>
<li><strong>Y</strong> - Y coordinate of the track start</li>
<li><strong>Z</strong> - Z coordinate of the track start</li>
<li><strong>TX</strong> - angle of the track in XZ plane</li>
<li><strong>TY</strong> - angle of the track in YZ plane</li>
<li><strong>chi2</strong> - goodness of fit of the track line to the track hits</li>
</ul>
<p>there is <strong>signal</strong> field in the training set, which equals to <b>1.0</b> for signal event and to <b>0.0</b> otherwise.</p>
<p>Training set also has field <strong>event_id</strong> either equals to -999, which means this track is a background or equals to shower ID (like in Episode 1) in case it is signal. </p>
<p>Unlike Episode 1, there are no starting points of the showers. This makes the problem much more challenging, but much closer to the proposed SHIP detector setting.</p>
<p>*) images are courtesy of OPERA collaboration.</p>