KIP publications

 
year 2013
author(s) J. Storey and C. Canali and S. Aghion et al. Group Authors(s): AEgIS Collaboration
title Particle tracking at 4 K: The Fast Annihilation Cryogenic Tracking (FACT) detector for the \AEgIS\ antimatter gravity experiment
KIP-Nummer HD-KIP 13-125
KIP-Gruppe(n) F24
document type Paper
Keywords "Antihydrogen", "Gravity", "Scintillators", "Tracking "
source Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 732 (2013) 437 - 441
doi 10.1016/j.nima.2013.05.130
Abstract (de)

"Abstract The \{AEgIS\} experiment is an international collaboration with the main goal of performing the first direct measurement of the Earth's gravitational acceleration on antimatter. Critical to the success of \{AEgIS\} is the production of cold antihydrogen ( H ¯ ) atoms. The \{FACT\} detector is used to measure the production and temperature of the H ¯ atoms and for establishing the formation of a H ¯ beam. The operating requirements for this detector are very challenging: it must be able to identify each of the thousand or so annihilations in the 1 ms period of pulsed H ¯ production, operate at 4 K inside a 1 T solenoidal field and not produce more than 10 W of heat. The \{FACT\} detector consists of two concentric cylindrical layers of 400 scintillator fibres with a 1 mm diameter and a 0.6 mm pitch. The scintillating fibres are coupled to clear fibres which transport the scintillation light to 800 silicon photomultipliers. Each silicon photomultiplier signal is connected to a linear amplifier and a fast discriminator, the outputs of which are sampled continuously by Field Programmable Gate Arrays (FPGAs). In the course of the developments for the \{FACT\} detector we have established the performance of scintillating fibres at 4 K by means of a cosmic-ray tracker operating in a liquid helium cryostat. The \{FACT\} detector was installed in the \{AEgIS\} apparatus in December 2012 and will be used to study the H ¯ formation when the low energy antiproton physics programs resume at \{CERN\} in the Summer of 2014. This paper presents the design requirements and construction methods of the \{FACT\} detector and provides the first results of the detector commissioning. "

bibtex
@article{Storey2013437,
  author   = {J. Storey and C. Canali and S. Aghion et al. Group Authors(s): AEgIS Collaboration},
  title    = {"Particle tracking at 4 K: The Fast Annihilation Cryogenic Tracking (FACT) detector for the \{AEgIS\} antimatter gravity experiment "},
  journal  = {"Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment "},
  year     = {"2013"},
  volume   = {"732"},
  number   = {""},
  pages    = {"437 - 441"},
  note     = {"Vienna Conference on Instrumentation 2013 "},
  doi      = {"http://dx.doi.org/10.1016/j.nima.2013.05.130"},
  url      = {"http://www.sciencedirect.com/science/article/pii/S0168900213007419"}
}
URL Storey2013437
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