Study the Z-Plane Strip Capacitance Page: 4 of 17
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planes will be efficient and effective in the long term. We measure the
capacitance between the copper strips and the ground plane, and compare it to
the theoretical value that we expect. Instead of measuring the capacitance
channel by channel, which would be a very tedious job, we developed a more
effective method of measuring the capacitance. Since all the Z-planes were built
at SLAC, we also built a smaller 46 cm by 30 cm Z-plane with 12 strips just to
see how they were constructed and to gain a better understanding about the
solder joints.
Introduction
The BaBar detector at Stanford Linear Accelerator Center (SLAC) is a
device that studies e+e- collisions at the T(4s). The detector group proposed an
upgrade in May 2003 which was intended to improve muon and neutral hadron
detection in the Instrumental Flux Return (IFR) barrel region of the BaBar
detector. Muon detection is vital for analyses such as semi-/leptonic decays and
lepton tagging for CP violation. Initially, Resistive Plate Chambers (RPCs) were
used, but several persistent problems in the RPCs resulted in continuous drop in
the efficiency of the muon identification. To improve the efficiency, the proposed
upgrade introduced a completely new technology of Limited Streamer Tubes
(LSTs). There are two components of LSTs: the streamer tube chamber array
and an associated Z-plane made up of copper strips and copper planes. A gas
flows through the streamer tubes, and when a passes through the tube, it4
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Parikh, H.; /Illinois U., Urbana & Swain, S. Study the Z-Plane Strip Capacitance, report, December 15, 2005; [Menlo Park, California]. (https://digital.library.unt.edu/ark:/67531/metadc878286/m1/4/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.