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Seminar by Dr. Allard van Marle from UNIST in Shouth Korea thumbnail

Seminar by Dr. Allard van Marle from UNIST in Shouth Korea

2019-06-20

Dr. Allard Jan van Marle visited ABBL and iTHEMS this week from his home institute of UNIST in South Korea. On Monday, June 17, he gave a seminar about his work in astrophysics, on particle acceleration and particle-shock interactions. This is a very difficult topic to study because of the very different scales (length, time, and energy) involved. Low-energy electrons and ions create the magnetic field turbulence that lets particle acceleration take place, so numerical simulations should resolve their motion. But accelerated particles have energies orders of magnitude higher, which means the numerical grid must be much larger to track them. Dr. van Marle presented a new numerical method that partially resolves this tension. This "particle in [MHD] cell" code averages out the majority of the low-energy electrons/ions, freeing up computational resources to track the higher-energy particles that are of more interest to most astrophysicists. Shock fronts are everywhere in the universe, but they come in a large variety of speeds, sizes, and locations. The work presented by Dr. van Marle will help to determine how (or if) all of these different shocks behave as natural particle accelerators.

Upcoming Events

Colloquium

iTHEMS Colloquium

Spacetime Geometry of Black Holes, Wormholes, and Time Machines

July 2 at 15:30 - 17:00, 2019

Prof. Pei-Ming Ho (Department of Physics, National Taiwan University)

Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria), RIKEN

Broadcast: R511, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN / SUURI-COOL (Kyoto), #204-205, 2F Maskawa Building for Education and Research, North Campus, Kyoto University / SUURI-COOL (Sendai), #303, 3F AIMR Main Building, Advanced Institute for Materials Research (AIMR), Tohoku University

Event Official Language: English

Workshop

1-day Workshop on Quantum Gravity

July 4 at 9:30 - 18:00, 2019

In order to construct a quantum theory of gravity, it is currently required to study freely from various viewpoints. In this small workshop, we will discuss various different topics such as field theory, string theory, quantum black hole, quantum universe and so on, and will consider future directions to quantum gravity casually but deeply. Let's enjoy exciting discussions!

Venue: #132, 1F, Main Research Building, RIKEN

Event Official Language: English

Workshop

Workshop on Sine-square deformation and related topics 2019 thumbnail

Workshop on Sine-square deformation and related topics 2019

July 11 at 10:00 - 18:00, 2019

Sine-Square Deformation (SSD) is a newly found boundary condition that involves the spatial modulation of the coupling constant of quantum systems.
Since its discovery, it has received broad attention in the context of various research field. This workshop aims at offering the opportunities for the researchers interested in SSD to convene and exchange ideas on the subject.

Venue: #435-437, Main Research Building, RIKEN

Event Official Language: Japanese

External Event

Dr. Don Warren thumbnail

Interstellar Memes

July 25 at 20:00 - 21:30, 2019

Dr. Don Warren (Research Scientist, iTHEMS)

Memes are to cultures what genes are to people: ideas, behaviors, or styles that are transmitted within the culture and can propagate or die out. The universe is a big place. How much of it knows about Grumpy Cat? Tale of Genji? Earth?

Cost: JPY1,500 including a drink

Venue: Good Heavens Bar (2F 5-32-5 Daizawa, Setagaya-ku, Tokyo 155-0032)

Event Official Language: English

Workshop

Co-hosted by iTHEMSSUURI-COOL (Kyoto)

RIMS-iTHEMS joint WS on "Math of Jets"

July 29 - 31, 2019

Co-hosted by RIMS Kyoto University and iTHEMS RIKEN.

Venue: Kyoto University, Main Campus Research Bldg No 15, #201

Event Official Language: Japanese

Workshop

Math-Life Workshop

August 19 - 20, 2019

Organizers
Masaharu Nagayama (MSC, Hokkaido Univ.)
Tetsuo Hatsuda (iTHEMS, RIKEN)
Hiroshi Suito (AIMR, Tohoku Univ.)
Takayuki Sakajyo (SACRA, Kyoto Univ.)

Venue: 1F Seminar Room, Frontier Research in Applied Sciences Building, Hokkaido Univ.

Event Official Language: Japanese

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