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

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

The French and Korean LIA teams

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)

Geant4 Collaboration 5 5

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

Group activities The Korean and French teams => Developed Geant4 R&D within Geant4 collaborations => Contributions on Geant4.10.3 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

Published paper

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

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

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

Korean Group Activity - Beam Simulation - Profiling for medical physics

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

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)

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

1. CPU time (second)

2. Memory size

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)

French Group Activity

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

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

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. 2017) => To achieve common goals

Thank you.