The international Short-Baseline Neutrino Program at Fermilab will measure properties of neutrinos, specifically how the flavor of a neutrino changes as it moves through space and matter. The program emerged from a joint proposal, submitted by three scientific collaborations, to use particle detectors to perform sensitive searches for νe appearance and νμ disappearance in the Booster Neutrino Beam. All of the detectors are types of liquid-argon time projection chambers, and each contributes to the development of this particle detection technology for the long-baseline Deep Underground Neutrino Experiment (DUNE).
About 250 scientists from more than 50 institutions in Brazil, Italy, Switzerland, Turkey, the United Kingdom and the United States work on the SBN program at Fermilab. Funding is provided by CERN, the United States (DOE Office of Science and National Science Foundation), Italy (INFN), United Kingdom (STFC), Switzerland (NSF) and Brazil (FAPESP). Many people who work on SBN are also part of DUNE.
This website offers an overview of the science that the SBN Program will explore. The detailed SBN scientific goals are outlined in the SBN Program proposal, available on the HEP arxiv. The program was granted Stage 1 approval in early 2015 and is presently in construction phase. The Short-Baseline Neutrino Program Office, manages the Department of Energy contributions to the Short-Baseline Neutrino Program and coordinates the construction and installation activities for the Near and Far detectors.
The ICARUS T600 detector, which comprises two cryostats holding liquid argon time projection chamber modules and photodetectors, will serve as the Short-Baseline Program Far Detector. It is the farthest from the BNB target, at a distance of 600 meters, and it is the largest of the detectors with 500 tons of liquid argon in the active volumes. Installation of the T600 at Fermilab occurs during 2017 and 2018, and includes newly developed readout electronics and a new cryogenics system.
MicroBooNE is located 470 meters from the Booster Neutrino Beam target, and consists of a 8250-wire TPC and 32 photomultiplier tubes which instrument 80 tons of liquid argon in the active volume. The cryostat was filled in 2015 and the detector is currently operating; this data is producing neutrino cross section measurements which can explore the unexplained excess of low-energy electromagnetic events observed by MiniBooNE. After the Short-Baseline Neutrino Near and Far detectors are operating, MicroBooNE will contribute to the Short-Baseline Neutrino scientific program.
Short-Baseline Near Detector, or SBND, is located just 110 meters from the Booster Neutrino Beam target, and has 112 tons of liquid argon within the active volume of its detection systems. The SBND cryostat is a membrane type, the same as planned for the future DUNE far detectors. The SBND time projection chamber design, and cold electronics, are not identical to those being developed for DUNE, but these share many features and closely resemble one another.
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