1 / 5

Review of Biasing Options in Geant4: Existing Features and Future Directions

This session explores the various biasing options available in Geant4, emphasizing the interconnectedness of these techniques across different physics domains such as EM and hadronics. Participants will review existing methods, discuss missing features, and brainstorm a wish list of desirable future enhancements. Topics include hindering issues, reliability of estimators, and the importance of documentation and user guidance. Join us to foster collaboration, share knowledge, and improve the biasing landscape in Geant4 and beyond.

rusti
Télécharger la présentation

Review of Biasing Options in Geant4: Existing Features and Future Directions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Parallel session 4-A Review of existing biasing options And beyond…

  2. Motivation for this session • We have several biasing options in Geant4 • Biasing is largely a “trans-category” technique • Appears in physics generators : gps… • In EM : reverse MC… • In hadronics : leading particle, radioactive decay… • But at the moment we have these living disconnected from each other • While there are certainly features, issues, solutions that can be shared • Some theoretical “culture” on foundations, statistics tools, etc. • with this reflected in documentation • for example the physics reference manual • Some practice “culture” : reliability of estimators, fake convergences… • Some knowledge of what is done elsewhere, in other packages • This session is an invitation in trying to connect/re-connect these various biasing developments, and try to state: • On the existing • On the missing features • And start to think about a wish list of actions

  3. Timetable [1/2] • 14:10   Introduction, Marc (now) • 14:20   Review of biasing options in other packages, John • 14:30   Biasing options in the hadronics : Leading Particle, (Total) Cross Section, Radioactive Decay, Dennis • 14:40   Reverse MC , Laurent • 14:50   Biasing option in GPS, Fan • 15:00   Geometrical biasing + Weight window technique, Alexander • 15:10   Scoring & biasing + Wrapper process, Makoto • 15:20   Implemented confidence level estimators, Tatsumi

  4. Timetable [2/2] • 15:30   Discussion (20’) • Improving/generalizing the existing (non exhaustive): • Hadronic has a (total) cross section biasing scheme : would it be useful to other packages ? At what cost ? • Documentation and examples: • documentation sometimes difficult to read, how to improve ? • Status of the examples related to biasing ? • Completing existing features: • Monitoring convergence of “tallies”: what software tools ? • What statistics tools, what confidence level estimators on tallies ? • Collecting wish list for new features (non exhaustive): • Forced interactions • Differential cross-section biasing • other ?

  5. My reading… • Using this book for my own teaching • Recent (2009) • Gives foundations • Lists applications • Foundations for • Splitting • Importance sampling • Robustness Properties &Confidence Interval Reliability • Which points in particular traps in of “fake convergences” • Transport chapter • T. Booth, MCNP • Focus on neutrons • Partly “independent” of the rest of the book, but still very informative… • This “transport chapter” helps to understand BTW that G4 is in general far to compete with MCNP on biasing…

More Related