Beam Energy Overview

This topic is principally concerned with setting the absolute energy scale of the colliding beams. Precise knowledge of the collision energy is needed to make mass measurements in both threshold scans and direct reconstruction using kinematic fits. The beam energy scale may also be useful to monitor detector calibrations at high energy using lepton pair production. The top mass measurement (at threshold) and the Higgs mass measurement (via direct reconstruction) both point to a target precision of roughly 100 PPM.

The following is a list of obvious topics and questions. Please feel free to suggest additional questions, provide answers, or express an interest in thinking about any of these issues.

Physics Questions

Potential Beam Instrumentation

Potential Detector Measurements

Operational Questions

General Questions (all techniques)

WISRD questions

BPM questions

Moller scattering

Documentation and References

Updated: November 5, 2004