Design considerations for the linac system of the ESS

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 161; pp. 1148 - 1153
• Main Authors: Bräutigam, W., Felden, O., Maier, R., Martin, S., Schnase, A., Schug, G., Stassen, R., Zaplatine, E.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2000
• Subjects: Advanced accelerator concepts; Linear accelerator; Proton beams; Spallation neutron source; Superconducting accelerator; 29.27.-a; Spallation neutron source; 29.17.+w; 41.75.Ak; 41.75.Lx; Linear accelerator; 29.25.Dz; Superconducting accelerator; Advanced accelerator concepts; Proton beams
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/S0168-583X(99)00706-5

The proposed European spallation neutron source (ESS) will be the leading neutron scattering research facility based on pulsed high intensity/high energy proton beams. According to the present reference design, a linear accelerator produces 1.2 ms long H − beam pulses of 1.334 GeV with a repetition rate of 50 Hz. The beam is accumulated in two rings. The stored beams are extracted in one turn resulting in a pulse of 1.3 μs duration which is delivered to one of the two liquid mercury target stations. Beams from two H − ion sources are pre-accelerated by radio frequency quadrupoles (RFQs), then combined to one beam of about 120 mA. After acceleration in a drift tube linac (DTL) to 70 MeV a coupled cavity linac (CCL) accelerates the beam to the final energy. The CCL can be realized in normal conducting or in superconducting (SC) version which is expected to result in a significant cost reduction for investment and operation.