Slide 1Yi Zhou
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Typical geometry:
Cu
Kapton
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The MTD (Muon Telescope Detector) installed in
Run9 is constructed by 3 long-strip MRPC
modules. There are 6 strips with 2.5 cm width
(φ direction) and 87 cm length (Z direction) on
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(inductor-capacitor). These LC cells connected to
individual anode or cathode readout strips . The
Localization information is determined by the
propagation time of the induced signals traveling
along the delay-line. The linearity and time response are depend on the time delay per cell and the distributed parameters of
readoutPCB .
Delay-line Design 1
The position resolution of the GEM detector should be less than 1cm(Better than resolution of MTD).
The max delay should be less than 30ns(Compatible with STAR trigger system).
The characteristic impedance should be 50 Ohm (To avoid the signal reflections).
Requirements for Delay-Line
Pitch of Readout Strips: 2mm
Total Readout Strips: 51
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In order to take into account the influence of the parasitical parameters of delay-line PCB routes, all parasitical parameter matrices can be calculated by the Finite Element method. To simplify the electric circuit model of the PCB route, the impedance, the mutual capacitance between two routes are ignored. Only the self-capacitances, inductance, characteristic impedance matrices are kept and used to construct the simplest electric circuit model (as the zero-order model).
Delay-line Design 3
Input at Strip 1
Input at Strip 9
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Summary
A Delay-Line readout PCB has been designed for this GEM project.
2 GEM detectors have been assembled and installed in STAR.
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