1. Highlights of Geant4 Okinawa meeting
J. Apostolakis with contribution from Alberto Ribon

2. Context Geant4 20th Anniversary Symposium – 1 day
Status of Geant4 in different domains
Panel discussion on challenges, outlook
19th Geant4 Collaboration Meeting
Shorter 4-day schedule (Tues-Frid)

3. Andreas Morsch G4 in Particle Physics
Papers in SPIRES

4. Context – Plenary sessions
6 Plenary Sessions (Tu-Th) on topics
Open Requirements
Technologies
EM phys. update & validation
Had. phys. update & validation
Gui/Vis, Examples & Doc
Kernel & Multi-threading

5. Context - Parallel Sessions
EM Physics (2 sessions)
i) Phys. Validation
ii) Developments
Hadronic Ph. (4 sessions)
Model dev, tuning & validation (2)
Hadronic data libraries
Technical aspects
Phys list validation tools & developments
Computing performance
Development in vis drivers
Geometry
Parallelism (2)
Open issues in MT
High performance simulation: vectors and accelerators
Technical
Reaccelerating at-rest particles
Event biasing
Geant4 general paper
Examples: Basic and extended

6. Topics from Geant4 Physics
Prepared by Alberto Ribon
“New Physics” in Geant4
Multi-TeV physics (EM & HAD)
Extension of INCL++ cascade beyond 2.5 GeV
Neutrino physics
Material physics
DNA physics & chemistry
New capabilities
Crystal structure
Chemical / radical interactions

7. Vladimir Ivantchenko G4 Electromagnetic Physics

8. Davide Mancusi High-Energy Extension of INCL++22

9. High-Energy String Models
Alberto Ribon FTF & QGS
High-Energy String Models
G4 Fritiof (FTF) model is a phenomenological model expected to be valid up to ~ few TeV
G4 Quark Gluon String (QGS) model is a theory-driven model expected to be valid to slightly higher energies than FTF
If it follows Kaidalov's theoretical prescriptions: under scrutiny by Vladimir Uzhinsky
To go to higher energies
For LHC 7/8 TeV -> 13/14 TeV, and even more for TeV
Need to include hard and semi-hard parton interactions (i.e. jet production), which is currently missing in G4 FTF & QGS
Examples on how this is done: e.g. HIJING, DPMJET, etc.

10. Dennis Wright Neutrinos in Geant4

11. Enrico Bagli G4 in Material Science

12. Enrico Bagli G4 in Material Science8

13. Pedro Arce Porting LEPTS in G4 (Low Energy Particle Tracking Simulation)

14. Selected Other Topics/Sessions
Technologies and tools
Computing Performance
Vector and Accelerator

15. Technologies and Tools
Session Link
Technologies and Tools
C++11 and beyond. What is in it for you?
Potential feature of interest for near term use in G4
OpenGL: widespread use in G4 Vis
Used in most drivers, including Qt, X, Xm, Win32, Wt
Use v1.x mostly in G4 (very old) – much deprecated
Radical changes in 2.x, and beyond: v3.0 and 4.0
Experience with profilers – Andrea Dotti
Gooda, Vtune and cutting-edge TAU tool
Templates for Optimisation & Vector. - JA

16. Computing Performance CMS
New
‘picture’
Improvements’
Total improvment

17. G4 EM Review & Performance
Number of small CPU improvements
Inlining (+/-), reduced divisions
Using exp/log from VDT
RNG – use vector call, cache engine pointer
Innovative use of TAU profiling tool
To improve
Issues of design
Report available

18. Expanding testing
Extend G4 tests to Xeon Phi with SLAC

19. Comparing against reference physics output in Ctest
New infrastructure!
Enables testing against reference data in ctest
Important – but not a silver bullet
The tool is now there
Must choose tests
Configure the ‘error’ threshold
Understand how to use effectively

20. Vector and Accelerator Parallel session

21. 21

22. Vector Physics – Soon Jun

23. GeantV: Prototype and Project Goals - Federico

24. G4based Radiation Dosimetry on GPU
Sh. Okada for KEK / Stanford Univ. ICME / SLAC
Microscopic-level validation
Macroscopic validation
Adjusted production cut to CT value
Found better (rather good) agreement with Geant4 9.6p02 (baseline)
Fixes,
Refinements
2x speedup

25. Outside the meeting

26. In this corner of the globe ..
Super Typhoon Vangfong – from the space station this past week!

27. Storm - Typhoon: is it moving towards us?
Super
Typhoon
Phanfone
Categ. 4
neared Okinawa Fri-Sat 2-3 Oct;
200 kph
sustained
winds
Lessons:
Weather really matters
Z= zulu = UTC = GMT
Okinawa (main island)
Followed up this weekend
Super
Typhoon
Vongfong Cat 5 – strongest typhoon of 2014,
Wind 240 kph

28. Backup slides

29. OpenGL evolution