D-Egg: a Dual PMT Optical Module for IceCube

Abstract

The D-Egg, an acronym for ``Dual optical sensors in an Ellipsoid Glass for Gen2,'' is one of the optical modules designed for future extensions of the IceCube experiment at the South Pole. The D-Egg has an elongated-sphere shape to maximize the photon-sensitive effective area while maintaining a narrow diameter to reduce the cost and the time needed for drilling of the deployment holes in the glacial ice for the optical modules at depths up to 2700 meters. The D-Egg design is utilized for the IceCube Upgrade, the next stage of the IceCube project also known as IceCube-Gen2 Phase 1, where nearly half of the optical sensors to be deployed are D-Eggs. With two 8-inch high-quantum efficiency photomultiplier tubes (PMTs) per module, D-Eggs offer an increased effective area while retaining the successful design of the IceCube digital optical module (DOM). The convolution of the wavelength-dependent effective area and the Cherenkov emission spectrum provides an effective photodetection sensitivity that is 2.8 times larger than that of IceCube DOMs. The signal of each of the two PMTs is digitized using ultra-low-power 14-bit analog-to-digital converters with a sampling frequency of 240 MSPS, enabling a flexible event triggering, as well as seamless and lossless event recording of single-photon signals to multi-photons exceeding 200 photoelectrons within 10 nanoseconds. Mass production of D-Eggs has been completed, with 277 out of the 310 D-Eggs produced to be used in the IceCube Upgrade. In this paper, we report the des\ ign of the D-Eggs, as well as the sensitivity and the single to multi-photon detection performance of mass-produced D-Eggs measured in a laboratory using the built-in data acquisition system in each D-Egg optical sensor module.

arXiv comment26 pages, 18 figures, 1 table

References in corpus (21)

• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• The IceCube Neutrino Observatory: Instrumentation and Online Systems
• First observation of PeV-energy neutrinos with IceCube
• IceCube-Gen2: The Window to the Extreme Universe
• Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data
• Evidence for neutrino emission from the nearby active galaxy NGC 1068
• Time-integrated Neutrino Source Searches with 10 years of IceCube Data
• The IceCube Data Acquisition System: Signal Capture, Digitization, and Timestamping
• The Design and Performance of IceCube DeepCore
• Calibration and Characterization of the IceCube Photomultiplier Tube
• Characteristics of the diffuse astrophysical electron and tau neutrino flux with six years of IceCube high energy cascade data
• Energy Reconstruction Methods in the IceCube Neutrino Telescope
• Measurement of South Pole ice transparency with the IceCube LED calibration system
• Measurement of the multi-TeV neutrino cross section with IceCube using Earth absorption
• Measurement of Atmospheric Neutrino Oscillations at 6-56 GeV with IceCube DeepCore
• Detection of a particle shower at the Glashow resonance with IceCube
• Measurement of Atmospheric Tau Neutrino Appearance with IceCube DeepCore
• Light-weight Flexible Magnetic Shields For Large-Aperture Photomultiplier Tubes
• Assembly and Installation of the Daya Bay Antineutrino Detectors
• Electronics Development for the New Photo-Detectors (PDOM and D-Egg) for IceCube-Upgrade

Cited by in corpus (1)

• Resolution Limiting Factors in Low-Energy Cascade Zenith Angle Reconstruction with the IceCube Upgrade