In 1998, tests with a two cell long prototype with Au-W anode wires connected (jumpered) at one end indicated the z coordinate of BMU hits may be determined by leading edge time division.
The tests were performed with Radeka preamps and black ASD cards and superceded (poor) results using resistive (stainless steel) wire and the dEdx ASD “charge to pulse width” encoding.
The studies were documented in CDF4545.
Z-coordinate information can discriminate against noise hits, for example spray striking the rear end of the BMU system.
IP end shrouds were designed and manufactured to accommodate jumpers.
Jumpers have been already been installed on some installed stacks.
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