Author: Mokhov, N.V.
Paper Title Page
MOPEA073 Current Status of the LBNE Neutrino Beam 255
  • C.D. Moore, K.R. Bourkland, C.F. Crowley, P. Hurh, J. Hylen, B.G. Lundberg, A. Marchionni, M.W. McGee, N.V. Mokhov, V. Papadimitriou, R.K. Plunkett, S.D. Reitzner, A.M. Stefanik, G. Velev, K.E. Williams, R.M. Zwaska
    Fermilab, Batavia, USA
  Funding: Work supported by the Fermilab Research Alliance, under contract DE-AC02-07CH11359 with the U.S. Dept of Energy.
The Long Baseline Neutrino Experiment (LBNE) will utilize a neutrino beamline facility located at Fermilab. The facility is designed to aim a beam of neutrinos toward a detector placed in South Dakota. The neutrinos are produced in a three-step process. First, protons from the Main Injector hit a solid target and produce mesons. Then, the charged mesons are focused by a set of focusing horns into the decay pipe, towards the far detector. Finally, the mesons that enter the decay pipe decay into neutrinos. The parameters of the facility were determined by an amalgam of the physics goals, the Monte Carlo modeling of the facility, and the experience gained by operating the NuMI facility at Fermilab. The initial beam power is expected to be ~700 kW, however some of the parameters were chosen to be able to deal with a beam power of 2.3 MW. The LBNE Neutrino Beam has made significant changes to the initial design through consideration of numerous Value Engineering proposals and the current design is described.
TUPFI061 Preliminary Design of a Higgs Factory μ+μ- Storage Ring 1487
  • A.V. Zlobin, Y.I. Alexahin, V.V. Kapin, V.V. Kashikhin, N.V. Mokhov, I.S. Tropin
    Fermilab, Batavia, USA
  Funding: Work supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, and by the US Department of Energy through the Muon Accelerator Program (MAP).
A Muon Collider offers unique possibilities for studying the recently found Higgs boson. Higgs bosons can be produced in reasonable amounts in the s-channel, so that the colliding muon beam energy of just 62.5GeV is required. Precision direct measurements of the Higgs boson mass and width is possible due to absence of brems- and beam-strahlung. At the same time, there are difficulties specific to muon colliders: relatively large beam emittance which necessitates quite small beta-function values (~ a few cm) at the interaction point in order to obtain sufficiently high luminosity, as well as superconducting magnet and detector protection from showers generated by muon decay products. Due to these factors, the required aperture of the final focus quadrupoles is very large (up to 0.5 m) posing challenging engineering constraints as well as beam dynamics issues with fringe fields. The first results of a complex approach to these problems in the Higgs Factory collider design are presented which promise luminosities in excess of 1031 cm-2s−1 with a 4 MW proton driver.
THPFI083 Radiation Damage Study of Graphite and Carbon-carbon Composite Target Materials 3487
  • P. Hurh, K. Ammigan, N.V. Mokhov
    Fermilab, Batavia, USA
  • N. Simos
    BNL, Upton, Long Island, New York, USA
  Funding: Operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02- 07CH11359 with the U.S. Department of Energy.
Use of graphite and carbon-carbon composite materials as high intensity proton targets for neutrino production is currently thought to be limited by thermal and structural material properties degraded by exposure to high energy proton beam. Identification of these limits for various irradiation and thermal environments is critical to high intensity targets for future facilities and experiments. To this end, several types of amorphous graphite and one type of carbon-carbon (3D weave) composite were exposed to 180 MeV proton beam at the BNL BLIP facility. Irradiated samples were then thermally, ultra-sonic, and structurally tested and compared to un-irradiated samples. Results show significant changes in material properties even at very low damage levels (<0.09 DPA) and that significant interstitial annealing of these properties occurs at annealing temperatures only slightly above irradiation temperature. This points the way to optimizing target operating temperature to increase target lifetime. A description of the plan to explore radiation damage in target materials through the new RaDIATE collaboration (Radiation Damage In Accelerator Target Environments) is also presented.