Mohammad Eshraqi

A very intense neutrino super beam experiment for leptonic CP violation discovery based on the European spallation source linac

Very intense neutrino beams and large neutrino detectors will be needed in order to enable the discovery of CP violation in the leptonic sector. We propose to use the proton linac of the European Spoliation Source currently under construction in Lund, Sweden, to deliver, in parallel with the spoliation neutron production, a very intense, cost effective and high performance neutrino beam. The baseline program for the European Spoliation Source linac is that it will be fully operational at 5 MW average power by 2022, producing 2 GeV 2.86 ms long proton pulses at a rate of 14 Hz. Our proposal is to upgrade the linac to 10 MW average power and 28 Hz, producing 14 pulses/s for neutron production and 14 pulses/s for neutrino production. Furthermore, because of the high current required in the pulsed neutrino horn, the length of the pulses used for neutrino production needs to be compressed to a few mu s with the aid of an accumulator ring. A long baseline experiment using this Super Beam and a megaton underground Water Cherenkov detector located in existing mines 300-600 km from Lund will make it possible to discover leptonic CP violation at 5 sigma significance level in up to 50% of the leptonic Dirac CP-violating phase range. This experiment could also determine the neutrino mass hierarchy at a significance level of more than 3 sigma if this issue will not already have been settled by other experiments by then. The mass hierarchy performance could be increased by combining the neutrino beam results with those obtained from atmospheric neutrinos detected by the same large volume detector. This detector will also be used to measure the proton lifetime, detect cosmological neutrinos and neutrinos from supernova explosions. Results on the sensitivity to leptonic CP violation and the neutrino mass hierarchy are presented

European Spallation Source

The European Spallation Neutron Source project includes a 5 MW superconducting linac, and aims for initial operation at 1.5 MW in 2019 with 5 MW capacity installed for 2023. Design considerations including the work done to find the minimum cost for preserved beam power will be discussed. This will include discussions on lessons learnt from SNS regarding e.g. superconducting RF performance and RF power sources. The design and construction plans and status will be described. NEUTRON USAGE AND HISTORICAL

The Opportunity Offered by the ESSnuSB Project to Exploit the Larger Leptonic CP Violation Signal at the Second Oscillation Maximum and the Requirements of This Project on the ESS Accelerator Complex

The European Spallation Source (ESS), currently under construction in Lund, Sweden, is a research center that will provide, by 2023, the worlds most powerful neutron source. The average power of t ...

Beam Diagnostics for ESS Commissioning and Early Operation

The ESS linac design has evolved over time and is now quite stable. Recently, there has been a focused effort on developing more detailed installation and commissioning plan, and related to this, the plans for diagnostics has also been reviewed. This paper presents the updated diagnostics suite. Many of diagnostics systems will be developed by in-kind partners across Europe.

The ESS Accelerator

The European Spallation Source, ESS, is now in construction in Lund, Sweden. It will be a long-pulse spallation source, using a 2 GeV superconducting proton linac to deliver a 5 MW beam onto a rotating, helium-gascooled tungsten target. ESS is a partnership between, at present, 11 European nations. According to current planning, the accelerator will be ready for beam in 2019, and by 2023 ESS will start operating as a user facility. This paper reviews the current status of the accelerator project.