Measurement of the luminosity at the DAFNE collider upgraded with the crab waist scheme

TL;DR

This paper details the development and performance evaluation of three detectors used to measure and characterize luminosity and background conditions at the DAFNE collider during its crab waist scheme tests in 2008-2009.

Contribution

It introduces three novel detectors for precise luminosity measurement and background characterization at the DAFNE collider with the crab waist scheme.

Findings

Detectors successfully measured luminosity during collider runs.

Performance data under various operational conditions are presented.

Detectors proved effective for background monitoring during experiments.

Abstract

The test of the crab waist collision scheme, undergoing at the e+e- Frascati DAFNE accelerator complex since February 2008, requires a fast and accurate measurement of the absolute luminosity, as well as a full characterization of the background conditions. Three different monitors, a Bhabha calorimeter, a Bhabha GEM tracker and a gamma bremsstrahlung proportional counter have been designed, tested and installed around the interaction point end of 2007-beginning of 2008. In this paper, we describe these detectors and present their performances in various operation conditions during the 2008 and 2009 DAFNE runs.