Fermilab, Batavia
Recent developments in the MARS15 code are described for the critical modules related to demands of hadron and lepton colliders and Megawatt proton and heavy-ion beam facilities. Details of advanced models for particle production and nuclide distributions in nuclear interactions at medium and high energies, energy loss, atomic displacements and gas production are presented along with benchmarking against data wherever is possible. Examples are given for the most demanding areas. The current experimental activities are described towards reduction of existing uncertainties in simulations.
BNL, Upton, Long Island, New York
Fermilab, Batavia
Proton irradiation effects on materials supporting high power experiments have been studied extensively using the BNL 200 MeV proton beam and the target station of the Linear Isotope Producer (BLIP). The goal has been to (a) observe changes in physio-mechanical properties in widely used materials and in new alloys and composites induced by energetic protons, (b) identify thresholds of flux/fluence, (c) study the role of temperature in damage reversal, and (d) correlate damage effects of different species such as energetic protons and neutrons. Experience data from experiments, i.e. NuMI, on target performance have been integrated with observations and aided by simulation studies to assess the role of energy and irradiation rate. Based on the correlation experimental results, experience data and simulation studies, new irradiation experiments linked to the long baseline neutrino experiment (LBNE) have been designed and performed. Results of irradiation studies in support of the neutrino factory initiative, the LBNE and the LHC will be presented and coupled with confirmatory simulations employed to reconcile experimental observations with anticipated NuMI target performance.
PSI, Villigen
Fermilab, Batavia
CERN, Geneva
For the first time the workshop on High-Intensity and High-Brightness Hadron Beams (HB2010), held at Morschach, Switzerland and organized by the Paul Scherrer Institut, included a Working group dealing with the interaction between beam and material. Due to the high power beams of existing and future facilities, this topic is already of great relevance for such machines and is expected to become even more important in the future. While more specialized workshops related to topics of radiation damage, activation or thermo-mechanical calculations, already exist, HB2010 provided the occasion to discuss the interplay of these topics, focusing on components like targets, beam dumps and collimators, whose reliability are crucial for a user facility. In addition, a broader community of people working on a variety of issues related to the operation of accelerators could be informed and their interest sparked.