Title :
Readout and trigger electronics for the TPC vertex chamber
Author :
Ronan, M.T. ; Jared, R.C. ; McGathen, T.K. ; Eisner, A.M. ; Broeder, W.J. ; Godfrey, G.L.
Author_Institution :
Lawrence Berkeley Lab., Berkeley, CA, USA
Abstract :
The TPC (Time Projection Chamber)/Two-Gamma facility has been upgraded with a straw vertex chamber for high-luminosity running of the PEP storage ring at the Stanford Linear Accelerator Center. The high-accuracy position resolution of the vertex chamber, measured to within about 4 cm of the beam vertex, will provide an impact parameter resolution of less than 90 mu m for tracks with momenta greater than 1 GeV/c. A description is given of the chamber, preamplifier/discriminator electronics, time-digitizer electronics, TPC triggering, vertex-chamber-trigger electronics, variable-coincidence-width circuitry, and test results.<>
Keywords :
coincidence circuits; position sensitive particle detectors; proportional counters; trigger circuits; 4 cm; 90 mum; TPC triggering; TPC vertex chamber; position resolution; preamplifier/discriminator electronics; readout electronics; straw vertex chamber; time-digitizer electronics; trigger electronics; variable-coincidence-width circuitry; vertex-chamber-trigger electronics; Atmosphere; Capacitance; Plugs; Preamplifiers; Resistors; Scattering; Steel; Structural beams; Switches; Time measurement;
Journal_Title :
Nuclear Science, IEEE Transactions on
