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ESSnuSB Experiments:

List of ESSνSB / ESSnuSB experimental components

1. ESSνSB Long-Baseline Neutrino Oscillation Experiment — main proposed experiment to measure leptonic CP violation at the second neutrino oscillation maximum.

2. ESS Proton Linac Upgrade — high-power proton driver for producing the neutrino beam; proposed upgrade toward 10 MW, 2.5 GeV, 28 Hz operation.

3. Accumulator Ring — compresses the ESS linac pulse from milliseconds to about 1–1.3 μs for horn focusing.

4. Target Station — high-power neutrino production target system, typically described with four targets and four magnetic horns.

5. Magnetic Horn Focusing System — focuses charged pions/kaons to create intense νμ or anti-νμ beams.

6. Decay Tunnel / Beamline — allows focused mesons to decay into neutrinos before the beam travels to detectors.

7. ESSνSB Near Detector Complex / END — measures neutrino flux and interaction cross-sections near the source. It includes:

   • Water Cherenkov near detector

   • Super Fine-Grained Detector / SFGD

   • NINJA-like emulsion detector, “Viking”

8. ESSνSB Far Detector / FD — large underground Water Cherenkov detector, often described as two large tanks with total mass around 540 kt, proposed at a long baseline such as Zinkgruvan mine, ~360 km from ESS.

9. ESSνSB+ / ESSnuSB-plus — extension program for precision neutrino–nucleus cross-section measurements in the 200–600 MeV region.

10. Low-Energy nuSTORM / LEnuSTORM — ESSνSB+ facility concept for controlled low-energy neutrino beams.

11. Low-Energy Monitored Neutrino Beam / LEMNB — ENUBET-like monitored beam concept under ESSνSB+.

12. Near-Near Water Cherenkov Detector — ESSνSB+ detector concept for cross-section measurements and possible sterile-neutrino studies