What does this research mean for the field?

The QCal Tile Calorimeter of KLOE improves the hermeticity of calorimetry in particle physics experiments. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to detail the design and functionality of the QCal Tile Calorimeter within the KLOE experiment.

March 5, 2026Open Access

The QCal Tile Calorimeter of KLOE

Key Points

This research aims to detail the design and functionality of the QCal Tile Calorimeter within the KLOE experiment.
Described the design and assembly of QCAL
Utilized cosmic rays and photons from KL decays for validation
Conducted time and energy calibration procedures
QCAL improves the hermeticity of KLOE calorimetry
Successful measurement of longitudinal shower positions using TOF
Preliminary results show effective energy calibration

Abstract

The quadrupole tile calorimeters of KLOE (QCAL) are two compact detectors placed close to the interaction point and surrounding the focusing quadrupoles. Their purpose is to increase the hermeticity of KLOE calorimetry. Each QCAL consists of a sampling structure of lead plates and scintillator tiles with wavelength shifter (WLS) fibers and mesh photomultiplier readout arranged in 16 azimuthal sectors. The arrangement of WLS fibers allows the measurement of the longitudinal position of the showers from time of flight (TOF).In this paper we describe the QCAL design and assembly and present preliminary results obtained with both cosmic rays and photons from KL decays. The time and energy calibration procedures are also discussed in detail.

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