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@INPROCEEDINGS{Baggemann:906985,
      author       = {Baggemann, J. and Zakalek, P. and Ding, Q. and Mauerhofer,
                      E. and Rücker, U. and Li, Jingjing and Loewenhoff, Th. and
                      Wirtz, Marius and Pintsuk, G. and Wolters, Jörg and
                      Bessler, Y. and Gutberlet, T. and Brückel, T.},
      title        = {{HBS} {H}igh {P}ower {D}ensity {N}eutron {T}arget -
                      {D}esign and {E}xperimental {T}ests},
      reportid     = {FZJ-2022-01798},
      year         = {2022},
      abstract     = {In recent years, the interest in low energy compact
                      accelerator-driven neutron sources (CANS)has increased
                      worldwide. The focus of this interest is shifting more and
                      more from smalluniversity based CANS to powerful high flux
                      CANS that have the potential to replace currentreactor based
                      neutron sources and possible alternatives to spallation
                      sources.Within the framework of the Jülich High Brilliance
                      Neutron Source (HBS) project, a high fluxaccelerator based
                      neutron source is developed. One of the key components as
                      well as themain power-limiting factor is the target that
                      releases neutrons from the impinging protonsvia nuclear
                      reactions. Since the neutron yield of nuclear reactions is
                      quite small, this iscompensated with a high proton current.
                      However, the high proton current leads to a strongheat
                      release inside the target. At the same time the target has
                      to be very compact to allowthe subsequent extraction of a
                      neutron beam with a high brilliance. Overall, this leads
                      tounique requirements of the HBS target given by a 70 MeV
                      pulsed proton beam with a peakcurrent of 100 mA and an
                      average thermal power release of 100 kW inside the target
                      with asurface area of 100 cm².A solid tantalum target
                      prototype with an innovative micro channel water cooling
                      structurewas developed, manufactured, and successfully
                      tested to match these requirements. Knownproblems from low
                      energy targets like blistering, limited heat dissipation and
                      highthermomechanical stresses have been consequently
                      minimized during the development.Feedback from the
                      production process helped to eliminate known weak points of
                      theprototype. The coolant erosion resistance of the micro
                      channel structure was demonstratedin a six-week endurance
                      experiment, to exclude possible concerns on this.
                      Furthermore, thetarget was successfully high heat flux
                      tested at ~1 kW/cm² in the electron beam facilityJUDITH 2
                      and with these measurements the design simulations of the
                      target could bevalidated. The specifics of the HBS target
                      concept as well as the results of the experimentalheat load
                      and erosion tests will be presented.},
      month         = {Mar},
      date          = {2022-03-28},
      organization  = {International Symposium UCANS9, online
                       by RIKEN, Japan (online event), 28 Mar
                       2022 - 31 Mar 2022},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-HBS / IEK-4},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-HBS-20180709 /
                      I:(DE-Juel1)IEK-4-20101013},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)1},
      url          = {https://juser.fz-juelich.de/record/906985},
}