Speaker
Alexander Ruschke
(Ludwig-Maximilians-Univ. Muenchen (DE))
Description
We present the newly developed Position Sensitive Scintillating Muon SiPM -Detector (POSSUMUS). This modular designed scintillation detector is capable to determine
particle's position two-dimensional with resolution of a few mm for minimum ionizing
particles. POSSUMUS is usable for large area trigger applications with few readout
channels.
The idea of this detector is to combine two trapezoidal shaped plastic scintillators to
form one rectangular shaped scintillator rod. Each trapezoid in a rod is
optically insulated against the other. In both trapezoids the scintillation light
is collected by wavelength shifting fibers (WLS-fibers) and guided to
Silicon-Photo-Multipliers (SiPM), where the light yield is detected. The SiPMs
are located at opposite sites of each WLS-fiber, an automatic voltage adjustment
allows for a stable gain of the detected light signals.
Position resolution in the transverse direction is achieved by the geometric shape
of the scintillators. The amount of light produced by incoming particles is proportional
to their path length in the trapezoid and thus position dependent. The longitudinal
position resolution, along the scintillator rod, is determined by the propagation time of
light to either end of the rod.
Because of its modularity, the POSSUMUS-detector can be used for trigger applications
of different sizes with only few readout channels. By combining several scintillator rods,
position sensitive areas from 100 cm2 to few m2 are achievable.
In this talk we present a fully operating prototype of POSSUMUS, the multi-channel
gain stabilization system for SiPMs and results for transverse and longitudinal position
resolution
Primary author
Alexander Ruschke
(Ludwig-Maximilians-Univ. Muenchen (DE))
Co-authors
Mr
Johannes Grossmann
(LMU)
Otmar Biebel
(Ludwig-Maximilians-Univ. Muenchen (DE))
Ralf Hertenberger
(Ludwig-Maximilians-Univ. Muenchen (DE))
Ralph Muller
(Ludwig-Maximilians-Univ. Muenchen (DE))
