1. Simulation of secondary beam production at RISP
Kihyeon Cho (KISTI) and Marc Verderi (LLR, N2P3)
2017 Joint Workshop of the France-Japan
and France Korea Workshop
Strasbourg, France, May 10~12, 2017

2. Contents The French and Korean LIA teams Korean Group Activity
French Group Activity
Plan 2

3. The French and Korean LIA teams

4. Members Korea Group France Group Kihyeon Cho (KISTI)
Chan Young Lee, Kyungho Kim,
Youngjoon Kwon (Yonsei U.)
- Insung Yeo (KISTI)
France Group
Marc Verderi (LLR, IN2P3)
Davide Mancusi (CEA)

5. Geant4 Collaboration 5 5

6. Purpose of the Project
To collaborate on beam simulations based on Geant4
Beam here = secondary particles produced by collision on a fixed target
Eg: isotope production by proton beam on carbide uranium target
Initial motivation is for the Korean “Rare Isotope Science Project” (RISP) project, at the “Institute for Basic Science” (IBS) in Daejeon .
Interest in Nuclear physics, Nuclear data for fast neutrons, Material science, Nuclear astrophysics, Atomic & particle physics, Medical and biological science.
Proton, oxygen, xenon & uranium beams of a few 100MeV/u
Under construction, expected start up in 2021
Goals:
Assess Geant4 performances in predicting isotope production.
Use it to anticipate isotope natures and production yields.
Foresee what measurements apparatus would be appropriate
Provide Geant4 profiling and benchmark for the medical physics
Note that the study interest is not limited to RISP.
Present activity
New 6

7. Group activities The Korean and French teams
=> Developed Geant4 R&D within Geant4 collaborations
=> Contributions on Geant release (Dec. 10, 2016)
The Korean team
=> Geant4 Quality and Assurance
Profiling and benchmark for medical physics
=> Also Geant4 beam simulations for secondary beam
The French team
=> Developing an ultra-thin beam profiler
=> Developing the “event biasing” in Geant4
=> Developing the INCLXX Geant4 model

8. Published paper

9. Face-to-face meeting Aim:.
Gean4 Collaboration meeting
University of Ferrara, Italia (Sep.12~16, 2016)
Aim:
- To attend the collaboration meeting and report our development of Geant4
- To outreach our activities and to communicate better Geant4 beam simulation
France Group
- Status of Generic Biasing
- Collaboration wide efforts
Korea Group
- Performance profiling and
Benchmark for medical physics

10. The int’l Geant4 Tutorial in Korea 2016.
KISTI, Daejeon, Korea (Dec. 8~10, 2016)
Aim:
- To outreach our activities to establish the contact between our teams
- To communicate better Geant4 beam simulation we are working on
=>The tutorial brings Geant4 users to discuss and survey the Geant4 results
Agenda
- Thursday, Dec. 8, 2016
Geant4 Collaboration meeting in Korea
- Friday, Dec. 9, 2016
Physics Overview
- Saturday, Dec. 10, 2016
EM physics

11. Products Beam Simulation
- Kihyeon Cho and Marc Verderi, The 5th FKPPL-FJPPL
workshop, Korea, May 18~20, 2016
Training on Students
- Chanyoung Lee (Ph.D student): Visited KISTI for one month (February, 2017) to be trained on beam simulations

12. Korean Group Activity - Beam Simulation
- Profiling for medical physics

13. Beam Simulation Cesium Isotopes Francium Isotopes
Reliability of Geant4 models in producing spallation fragmentation species
Cesium Isotopes
Number of mass
Francium Isotopes
FTFP_BERT
FTFP_BERT_HP
QGSP_BERT
QGSP_BERT_HP
QGSP_BIC
QGSP_BIC_HP
FTFP_INCLXX
FTFP_INCLXX_HP
QGSP_INCLXX
QGSP_INCLXX_HP
Number of mass
=> Selected FTFP_INCLXX

14. Beam Simulation (con’t)
Application in astrophysics, nuclear imaging, …
cross section[mb]
Atomic number(Z)
Proton beam with U Target
- 1 GeV
- 200 MeV
- 100 MeV
cross section[mb]
Atomic mass(A)

15. Profiling for medical physics
New !
Addition to HEP benchmarks
Using Brachytheray simulation(Low Energy)
- cf. Brachytherapy(MeV) vs. SimplifiedCarlo(TeV)
- To check CPU and Memory size
- To check profiling on mesh size

16. 1. CPU time
(second)

17. 2. Memory size

18. 3. Profiling on Mesh size Future => Linear depending on mesh size
To usage: Geant4 profiling test => G4 Q&A
Version dependency
Scalability for new computing architecture (KISTI supercomputer)

19. French Group Activity

20. French group activity (1/2)
Ultra-thin beam profiler (< 15 mm water equivalent)
Initially motivated by medical needs
But appears to be of wider interest
Principles experimentally validated this year
Patent on the technique developed considered

21. French group activity (2/2)
Development of “event biasing” techniques in Geant4
Expect to provide biasing functionalities at the level of other existing simulation packages
With the advantage of Object Oriented technologies: the user can extend the functionalities, not only use them.
Revised and uniformised existing Geant4 techniques
And provided flexible framework to extend to other techniques:
Biasing of physics process interaction law
Biasing in final state production
Both
Development released in last Geant4 version 10.3
Development of the Liège cascade model INCLXX of Geant4

22. Plan => To achieve common goals On the scientific side
To continue with beam simulation
To study optimization on beam
Outreach and off-line meeting
- Geant4 Tutorial in Seoul 2017 (July, 2017)
2017 Geant4 Collaboration meeting, Australia(Sep )
=> To achieve common goals

23. Thank you.