IEEE 2017 NSS/MIC/RTSD ControlCenter

Online Program Overview Session: N-10

To search for a specific ID please enter the hash sign followed by the ID number (e.g. #123).

Simulation

Session chair: Maria Grazia Pia; Georg Weidenspointner
 
Shortcut: N-10
Date: Tuesday, October 24, 2017, 08:00
Room: Regency VII
Session type: NSS Session

Overview of Monte Carlo particle transport codes

Contents

8:00 am N-10-1 Download

Overview of the Workshop on Software Reliability (#4348)

M. G. Pia1, E. Ronchieri2

1 INFN Genova, Genova, Italy
2 INFN CNAF, Bologna, Italy

Content

This brief overview summarizes the topics presented and discussed at the Workshop on Software Reliability, scheduled on Sunday, October 22. A substantial part of the workshop program concerns the reliability of simulation software and its experimental applications, as well as analysis methods for objectively assessing the validity of simulation results. As the workshop also includes a few tutorials, information about how to access the training material will be circulated.

Keywords: Software reliability, simulation
8:18 am N-10-2

Recent developments for the upcoming FLUKA release (#4104)

F. Salvat-Pujol1

1 European Organization for Nuclear Research (CERN), GENEVA, Genève, Switzerland

On behalf of the FLUKA Collaboration

Content

An overview will be presented of FLUKA, a general-purpose code for the Monte Carlo simulation of radiation transport in complex geometries. In view of the next release of FLUKA, a selection of the code's new capabilities will be presented, highlighting recent model development efforts, ranging from the high-energy domain (relevant for applications in the CERN accelerator complex) to the low-energy domain (relevant for hadron therapy).

Keywords: Monte Carlo, FLUKA, radiation transport, hadron therapy, nuclear physics, CERN, hadronic interactions, electromagnetic interactions
8:36 am N-10-3

MCNP6 Built-in SNAP-3 Detector Response Functions (#3586)

C. A. Anderson1, G. W. McKinney1

1 Los Alamos National Laboratory, NEN-5, Systems Design and Analysis, Los Alamos, New Mexico, United States of America

Content

Characterizing a detector response in MCNPTM requires detailed modeling of the detector geometry, accounting for all secondary particles produced, understanding the material response in the active region, and performing full radiation transport within the detector volume. We have simulated eight unique detector responses for different detector configurations and incident particle scenarios using the Los Alamos National Laboratory’s Shielded Neutron Assay Probe, Model 3 (SNAP-3) 3He neutron detector. Using the incident neutron flux on the surface of the detector, these were built-in to MCNP and are provided as flux-to-detector-response functions that can be invoked using MCNP’s DF tally option. These functions simplify the process for modeling the detector response in MCNP by eliminating the geometric modeling and transport requirement within the detector, as they can be determined by applying a simple conversion function from an incident flux. This paper outlines the process of providing built-in detector response functions in MCNP for these eight configurations of the SNAP-3 neutron detector.

This work has been supported by the U.S. Department of Homeland Security, Domestic Nuclear Detection Office, under competitively awarded contract/IAA HSHQDC-12-X-00251. This support does not constitute an express or implied endorsement on the part of the Government.

Keywords: MCNP, Detector Response Functions, SNAP-3 Neutron Detector
8:54 am N-10-4 Download

Old and New Cross Sections (#2571)

M. Bonanomi1, F. Cattorini1, M. C. Han3, G. Hoff2, C. H. Kim3, S. H. Kim3, M. Marcoli1, M. G. Pia4, P. Saracco4

1 University of Milano Bicocca, Milano, Italy
2 Univesidade do Estado do Rio de Janeiro (UERJ/IPRJ), Niva Friburgo, Brazil
3 Hanyang University, Seoul, Republic of Korea
4 INFN Genova, Genova, Italy

Content

New cross section calculations are usually advertised as improvements over previous ones. Nevertheless these claims are not always supported by rigorous statistical tests.

A set of electron impact ionization cross sections for inner shells, used by, or intended for Monte Carlo particle transport codes, has been evaluated in a large scale validation test with respect to an extensive collection of experimental data retrieved from the literature. It includes the cross sections tabulated in EEDL (Evaluated Electron Data Library), recent calculations by Bote and Salvat, the Binary-Encounter-Bethe (BEB) model and the Deutsch-Märk (DM) model. The cross sections were compared to experimental data by means of goodness-of-fit tests. The picture that emerges from the validation test does not fully support the expectations of improvement. The complete and final results of the validation process are reported in detail and critically discussed.

Keywords: simulation, ionisation, validation
9:12 am N-10-5 Download

The systematics of Fluorescence Yields (#2568)

M. Bonanomi1, F. Cattorini1, M. Marcoli1, M. G. Pia2

1 University of Milano Bicocca, Milano, Italy
2 INFN Genova, Genova, Italy

Content

The fluorescence yield associated with an atomic shell is defined as the probability that a vacancy in that shell is filled through a radiative transition. Fluorescence yields, especially those for the K shell, are among the most important atomic physics parameters in experimental practice, as experimental methods based on X-ray fluorescence are widely used in several applied physics fields. A variety of experimental, theoretical and semi-empirical fluorescence yields is documented in the literature; several compilations have been assembled, either based on fits to experimental data or on theoretical calculations. We present an extensive assessment of the systematics associated with fluorescence yields. This study was motivated by the need to estimate and control the effects due to these parameters in validation tests of electron impact ionisation cross sections calculated by physics models used in particle transport codes. Although effects of using different fluorescence yield values were remarked in some specific cases, to the best of our knowledge this is the first time that this subject is addressed in a comprehensive way, and is analyzed by means of statistical methods to quantify the possibly associated systematics objectively.

Keywords: X-rays, validation, test
9:30 am N-10-6

Evaluated Atomic Data: a Review of Their Validation (#2551)

M. Bonanomi1, F. Cattorini1, C. Choi1, M. C. Han2, G. Hoff3, C. H. Kim2, S. H. Kim2, M. Marcoli1, M. G. Pia4, P. Saracco4

1 University of Milano Bicocca, Milano, Italy
2 Hanyang University, Seoul, Republic of Korea
3 Univesidade do Estado do Rio de Janeiro (UERJ/IPRJ), Nova Friburgo, Brazil
4 INFN Genova, Genova, Italy

Content

The Evaluated Atomic, Electron and Photon Data Libraries (EADL, EEDL and EPDL, respectively) provide the grounds for the simulation of electromagnetic interactions in several Monte Carlo particle transport codes. The most recent of them, EPDL97, was released twenty years ago; although they have been in use for a long time, they have been only partially validated through comparisons with experimental data.

This presentation reviews the status of the validation of these data libraries; it summarizes the results reported in the literature and illustrates a few recent ones, which have not been published yet. It identifies the current gaps in the validation of the various components of the three data libraries and the shortage of experimental data in some areas, which hinders the validation. Furthermore, it highlights their position with respect to other calculations in view of determining the state of the art of electromagnetic cross sections and other atomic parameters. These results are relevant to most major Monte Carlo codes and provide guidelines for the next generation of data libraries currently in preparation.

Keywords: Monte Carlo, simulation, modeling, validation