UV Laser Calibration System for SBND
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The Short Baseline Near Detector (SBND) is a liquid argon time projection chamber (LArTPC) neutrino detector located at Fermilab, Illinois. SBND is one of three detectors in the Short-Baseline Neutrino (SBN) program. Its purpose is to study neutrino oscillations, particularly sterile neutrinos, and provide precise measurements of neutrino interactions, which are crucial for understanding fundamental particle physics
SBND Building at Fermilab
Detector Rigging at SBND Cryostate
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The laser calibration system in SBND, specifically a UV laser, is essential for measuring and calibrating the Electric field within the detector's liquid argon medium. This calibration system projects controlled laser-induced ionization tracks within the detector, mimicking particle trajectories. By analyzing the laser tracks, we can detect distortions in the electric field caused by space charge effects (e.g., ion buildup), ensuring accurate particle reconstruction. This precision is critical, as it directly affects the accuracy of neutrino interaction measurements, ultimately enhancing the SBND's sensitivity to physics beyond the Standard Model.
After successful installation of one out of four Laser system at SBND
Simulated laser tracks inside one TPC
Open view of Laser Box
Optical Pyramid close to laser head