The upgrade of the ESS linear accelerator to produce the world’s most intense neutrino Super Beam – a challenge
by
Elena Wildner(CERN, Geneva, Switzerland)
→
Europe/Stockholm
Å11167 (Uppsala University)
Å11167
Uppsala University
Description
The European Spallation Source in Lund is based on what will be the world’s most powerful linear proton accelerator. This accelerator will produce a 2 GeV proton beam of 5 MW to be sent to a spallation target to provide the world’s most intense production of pulsed neutrons to be used for basic and applied material research. The linac duty factor required for such operation is low (4 %) which will permit increasing the linac pulse frequency from 14 Hz to 28 Hz. The extra pulses will be sent to another target with the aim to produce an intensive neutrino Super Beam with the potential of providing unprecedented opportunities for fundamental neutrino-physics research.
A compressor ring will be needed to produce the short beam pulses required for the neutrino target and horn. For this is required that 2.86 ms long pulses of 9 E14 H- ions be accelerated in the linac and charge-exchange injected into the compressor ring. Demanding requirements have to be met to be able to accelerate the proton and the H- beams simultaneously, to master space charge effects in the compressor ring, to manage potential beam losses from different parasitic H- stripping mechanisms, to prevent halo formation by collimation and to add a source for H- to the linac while minimizing potential emittance growth in the low-energy section of the linac, all at minimal project cost.
The presentation will give an overview of the ESS facility and an introduction to the very challenging tasks that will have to be accomplished to upgrade this facility to operate, not only as the world’s most intense neutron source, but also, simultaneously, as provider of the world’s most intense neutrino Super Beam