Development of a 40MHz gas ionization detector for optimization of luminosity in LHC

by William C. Turner (LBNL)

Thursday 18 Oct 2001, 14:15 → 15:15 Europe/Zurich

SL Auditorium (CERN)

A fast, radiation hard, pressurized, multi-gap ionization chamber interfaced to a low noise charge sensitive preamplifier is being developed for use in optimizing the luminosity of the LHC. These detectors are designed to be installed in the zero degree neutral particle and the front quadrupole absorbers of insertion regions 1 and 5. They could be used in a feedback system with orbit correctors to keep the beams in optimum collision conditions. Such a system provides many interesting challenges in ionization chamber design and the application of low noise fast electronics. Developmental devices have been tested in the SPS H4 beamline using single 300-450 GeV protons to simulate hadron showers produced by collision products of pp interactions in the LHC. The data provide convincing evidence that the luminosity of the LHC can be measured on a bunch by bunch basis at 40MHz over the entire range of luminosity envisioned for the LHC. The design principles, simulations and experimental results will be described.

Organiser(s): Werner Herr / SL Division

Note: * PLEASE NOTE UNUSUAL TIME ! *

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