18829100
Data acquisition system for the MuLan muon lifetime experiment
Abstract We describe the data acquisition system for the MuLan muon lifetime experiment at Paul Scherrer Institute. The system was designed to record muon decays at rates up to 1 MHz and acquire data at rates up to 60 MB/s. The system employed a parallel network of dual-processor machines and repeating acquisition cycles of deadtime–free time segments in order to reach the design goals. The system incorporated a versatile scheme for control and diagnostics and a custom web interface for monitoring experimental conditions.
119279381
A tungsten/scintillating fiber electromagnetic calorimeter prototype for a high-rate muon (g -2) experiment
Abstract A compact and fast electromagnetic calorimeter prototype was designed, built, and tested in preparation for a next-generation, high-rate muon ( g − 2 ) experiment. It uses a simple assembly procedure: alternating layers of 0.5-mm-thick tungsten plates and 0.5-mm-diameter plastic scintillating fiber ribbons. This geometry leads to a detector having a calculated radiation length of 0.69 cm, a Moliere radius of 1.73 cm, and a measured intrinsic sampling resolution term of ( 11.8 ± 1.1 ) % / E ( GeV ) , in the range 1.5–3.5 GeV. The construction procedure, test beam results, and GEANT-4 comparative simulations are described.
120889645
A topological approach to high-energy large transverse momentum interactions
We discuss the high pT strong interaction from a topological (1/Nf) expansion viewpoint. Topology of quark line graphs is used to classify the underlying process rather than constituent scattering, all constituents being implicitly confined. The distinction between “jets” and “background” is clarified in a very simple dynamical model. Although the model does not require quarks as dynamical entities, many of its features are in agreement with parton model predictions.