What question did this study set out to answer?

The study aims to test the crab waist collision scheme by measuring the absolute luminosity at the DAFNE accelerator.

March 5, 2026Open Access

Measurement of the Luminosity at the DAFNE Collider Upgraded with the Crab Waist Scheme

Key Points

The study aims to test the crab waist collision scheme by measuring the absolute luminosity at the DAFNE accelerator.
Utilized three different monitors: Bhabha calorimeter, Bhabha GEM tracker, and gamma bremsstrahlung proportional counter.
Designed, tested, and installed monitors around the interaction point.
Conducted measurements during DAFNE runs in 2008 and 2009.
Monitors provided fast and accurate luminosity measurements.
Detectors demonstrated effective performance under various operational conditions.
Full characterization of background conditions was achieved.

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.

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