Bochum 1998 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HK: Hadronen und Kerne

HK 52: Heavy Ion Reactions VI, Relativistic Energies

HK 52.10: Talk

Wednesday, March 18, 1998, 16:30–16:45, F

Spallation Neutron Target Experiments at the AGS-BNL — •R.D. NEEF ¹, M. ARAI ², G. BAUER ³, A.S. CARROLL ⁴, H. CONRAD ¹, D. FILGES ¹, M. FUTAKAWA⁵, D. GLASGOW ⁶, J. HAINES ⁶, J. HASTINGS ⁴, Y. IKEDA ⁵, E. JERDE ⁶, Y. KIJANAGI ⁷, H. NAKASHIMA ⁵, H. SPITZER ³, H. STECHEMESSER ¹, H. TAKADA ⁵, and N. WATANABE ⁵ — ¹FZ Jülich (Germany) — ²KEK (Japan) — ³PSI (Switzerland) — ⁴BNL (USA) — ⁵JAERI (Japan) — ⁶ORNL (USA) — ⁷Univ.of Hokkaido (Japan)

The proton energy range above 1 to 2 GeV for spallation targets was considered undesirable because the neutron generation in the target was suspected to become to smeared out over the depth of the target. Recent theoretical studies indicate that this effect might not be as serious as previously assumed. AGS delivers short pulsed high intensity proton beams upto 24 GeV with approximately 10¹³ ppp. The ASTE collaboration measured in a first test experiment with a mercury thick cylindrical target-diameter 20 cm and length 130 cm energy deposition (temperature rise), pressure waves effects (stress in the target containment) and neutron leakage distribution at proton beam energies of 1.5, 7.0 and 24.0 GeV. These experiments are of great relevance for the development of high intensity short pulsed neutron spallation sources as ESS (European Spallation Source) and the SNS (Spallation Neutron Source - USA). First experimental results on temperature rise and neutron leakage distributions are compared with intra-nuclear-cascade-evaporation simulations.