Monte Carlo Particle Lists: MCPL

Kittelmann, T.; Klinkby, E. B.; Knudsen, Erik Bergbäck; Willendrup, Peter Kjær; Cai, Xiao Xiao; Kanaki, K.

doi:10.1016/j.cpc.2017.04.012

Cited by 35 publications

(27 citation statements)

References 34 publications

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“…Dose rate distribution in the shielding around BIFROST guide, cut by horizontal plane at guide height. simulation of the instrument was performed with recording neutron states crossing the guide section at 48 meters in a MCPL format file [21], a capability which is included in standard functionality of McStas. The pre-compiled C-language libraries which contain routines for reading MCPL files were then linked to a FLUKA executable at compilation together with writing another custom user-defined source routine.…”

Section: Usecase Example: Ess Bifrostmentioning

confidence: 99%

McStas and Scatter Logger driven calculations of prompt gamma shielding for neutron guides

Kolevatov

2020

JNR

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McStas ScatterLogger component bundle was adapted for evaluating a contribution to dose rate around neutron guides arising from prompt gamma radiation accompanying neutron capture in the supermirror guide coating upon specular reflection. Thickness of typical shielding materials needed to reduce this contribution to the desired level can be now evaluated directly from running a ray-tracing simulation of the instrument in McStas. An overview of the corresponding modifications to the existing McStas components and description of the newly written supplementary ones is given together with examples and use instructions.

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Section: Usecase Example: Ess Bifrostmentioning

confidence: 99%

McStas and Scatter Logger driven calculations of prompt gamma shielding for neutron guides

Kolevatov

2020

JNR

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“…Motivated by the need for simulation packages to efficiently exchange particle data, the ESS Detector Group developed the Monte Carlo Particle List (MCPL) file format [20]. It is a well-defined, binary format containing full particle state information.…”

Section: The Mcpl File Formatmentioning

confidence: 99%

“…As a part of the detector and instrument optimization processes, it is beneficial to use customized input for the detector simulation, e.g. a realistic distribution of neutrons McStas Geant4 Figure 5: Raw Q distribution for a subset of the detectors of the instrument (from [20]).…”

Section: The Mcpl File Formatmentioning

confidence: 99%

Simulation tools for detector and instrument design

Kanaki

Kittelmann

Cai

et al. 2018

Physica B: Condensed Matter

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The high performance requirements at the European Spallation Source have been driving the technological advances on the neutron detector front. Now more than ever is it important to optimize the design of detectors and instruments, to fully exploit the ESS source brilliance. Most of the simulation tools the neutron scattering community has at their disposal target the instrument optimization until the sample position, with little focus on detectors. The ESS Detector Group has extended the capabilities of existing detector simulation tools to bridge this gap. An extensive software framework has been developed, enabling efficient and collaborative developments of required simulations and analyses -based on the use of the Geant4 Monte Carlo toolkit, but with extended physics capabilities where relevant (like for Bragg diffraction of thermal neutrons in crystals). Furthermore, the MCPL (Monte Carlo Particle Lists) particle data exchange file format, currently supported for the primary Monte Carlo tools of the community (McStas, Geant4 and MCNP), facilitates the integration of detector simulations with existing simulations of instruments using these software packages. These means offer a powerful set of tools to tailor the detector and instrument design to the instrument application.

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“…Currently, the Particle and Heavy Ion Transport code System (PHITS [2]) does come packaged with this feature while other popular codes such as the Monte-Carlo N-Particle Transport (MCNP) family of codes [3], the Geant4 Toolkit [4,5], and FLUKA [6] do not. This deficiency has been addressed in a number of different ways, which include for example patched versions of MCNPX [7,8] and MCNP6 [9,10] or interfacing with neutron-ray tracing software such as McStas [11,12] or Vitess [13,14] using specialized tools [15][16][17][18][19]. In addition, the PHITS software also includes a powerful technique for enhancing the efficiency of the supermirror transport, referred to as the duct-source method.…”

Section: Introductionmentioning

confidence: 99%

Simulating neutron transport in long beamlines at a spallation neutron source using Geant4

DiJulio

Svensson

Cai

et al. 2020

JNR

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The transport of neutrons in long beamlines at spallation neutron sources presents a unique challenge for Monte-Carlo transport calculations. This is due to the need to accurately model the deep-penetration of high-energy neutrons through meters of thick dense shields close to the source and at the same time to model the transport of low-energy neutrons across distances up to around 150 m in length. Typically, such types of calculations may be carried out with MCNP-based codes or alternatively PHITS. However, in recent years there has been an increased interest in the suitability of Geant4 for such types of calculations. Therefore, we have implemented supermirror physics, a neutron chopper module and the duct-source variance reduction technique for low-energy neutron transport from the PHITS Monte-Carlo code into Geant4. In the current work, we present a series of benchmarks of these extensions with the PHITS software, which demonstrates the suitability of Geant4 for simulating long neutron beamlines at a spallation neutron source, such as the European Spallation Source, currently under construction in Lund, Sweden.

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Monte Carlo Particle Lists: MCPL

Cited by 35 publications

References 34 publications

McStas and Scatter Logger driven calculations of prompt gamma shielding for neutron guides

McStas and Scatter Logger driven calculations of prompt gamma shielding for neutron guides

Simulation tools for detector and instrument design

Simulating neutron transport in long beamlines at a spallation neutron source using Geant4

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