Cosmic Ray Tagging System

Cosmic Ray Tagging System schematic showing CRT surrounding the cryostat

Welcome to the ICARUS Cosmic Ray Tagging System (CRT) simulation/reconstruction wiki! This page is brand new and under construction! The information provided here will assume you have some familiarity with LArSoft. Before discussing the software, some details on the hardware side will be provided.

The ICARUS CRT's principle objective is to tag crossing muons, which pass in close proximity to the argon volume, with high (~95%) efficiency. This is achived by surrounding the cryostat with two layers of plastic scintillator. Yielding to spatial constraints in the detector hall, the CRT must cover a large (~1200 m\^2) surface area. To cope with this fact, the CRT consists of three subsystems made up of different type of scintillator modules. The modules are denoted by their origin, CERN, MINOS, and Double Chooz(D) types.

LArSoft does not currently provide support for CRT code, though some people are working to change this. All code related to the CRT with the exception of the geometry generation script lives in /icaruscode/CRT. This directory contains some subdirectories. CRT/CRTProducts contains the classes and dictionary necessary to introduce CRT data products to LArSoft. CRT/CRTUtils contains algorithms and utilities for use with modules living in CRT.

Detector Simulation

All code related to the CRT detector simulation is contained in CRTDetSim_module.cc

  • Light output/attenuation
  • Front-end electronic

Reconstruction

  • CRT hits
  • CRT tracks

Work in progress

  • Update geometry (e.g. sloped CERN modules -> rim (vertical))
  • (Sim) tune energy and time resolution, light yield, attenuation models as test stand data becomes available
  • (Reco) apply dual ended readout to (uncut) MINOS modules to hit reco
  • (Sim) detector response, readout electronics for Double Chooz modules not understood