T-1042: Muon g-2 Straw Tracker
Abstract
The new g-2 experiment is being constructed to improve on the current value measured at Brookhaven. One of the factors contributing to the improved understanding of systematic errors is a straw chamber that sits in the vacuum, close to the muon beam. These chambers can be used for a parasitic Electric dipole moment measurement, improved understanding of the beam dynamics and will improve the pile up library for the calorimeter. The chambers being built will consist of doublet U-V layers (with 15° between layers). The straws are made of wound mylar. One layer consists of 500 angstroms of aluminum on top of the mylar (the outside) and the other layer has 500 angstroms aluminum plus 200 angstroms of gold on the mylar. The two strips are wound together to make a straw. The straws will have a 25 micron gold plated tungsten wire in the middle at high voltage (~1400V) as the sense wire. A gas consisting of 80-20 Ar-C02 will be flowed through the straws. This will be a 32 channel prototype consisting of straws that are 9cm long.
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