ICPEAC2025 1st Announcement

Welcome

Welcome to ICPEAC2025, the XXXIV International Conference on Photonic, Electronic and Atomic Collisions, held in Sapporo, Hokkaido, Japan. It is held from 29 July to 5 August 2025 at the Sapporo Convention Center in the heart of the city.

The ICPEAC covers collisions involving photons, electrons, atoms, ions, molecules, clusters, surfaces, and exotic particles, and extends dramatically to the forefront of the developments in ultracold, attosecond, and strong-field atomic and molecular physics and related areas. The scientific program of the ICPEAC XXXIV includes tutorials and plenary lecturers, progress reports, and hot topics selected by the International Program Committee. More than several hundred posters are presented. The ICPEAC conference series began in New York, USA, in 1958 and has been held every other year since 1961. This is the third time it has been held in Japan, following Kyoto in 1979 and Sendai in 1999. Sapporo is one of the largest cities in Japan, located in the heart of the northern island Hokkaido.

The conference was approved at the 31st ICPEAC held at Deauville, France in 2019. Since then, careful preparations have continued to welcome participants from all over the world: more than a hundred of the local committee members and friends have come together to make it a great conference. After a long period of various difficulties due to the COVID-19, we are back to the on-site conference. We believe in the importance of the meeting where participants getting together from different locations can communicate directly with each other and exchange valuable information. The role of direct communication has not lost its significance but rather has increased despite the availability of modern tools such as web-conference devices or various social network services.

We guarantee the safe and comfortable atmosphere of Japan with relatively stable commodity prices so far. You can also enjoy another aspect of our country at Hokkaido by getting in touch with nature in Hokkaido and having a cultural experience that includes delicious food and drink. See you soon at Sapporo.

Chair and Co-chairs of the local organizing committee
Toshiyuki Azuma
Kenichi Ishikawa
Masahiko Takahashi
Naoki Watanabe

Important Dates

2nd announcement & call for abstracts	January, 2025
Registration	opens in January, 2025
Abstract submission deadline	March 7th, 2025
Early registration deadline	May 29th, 2025

Main Topics

• Photon impact-weak fields (synchrotron, FEL)
• Photon impact-strong fields (femto/attosecond physics)
• Electronic collisions with atoms, molecules, and ions
• Collisions between ions, atoms, and molecules
• Antimatter and other exotic particle collisions
• Field assisted collisions
• Ultracold atomic and molecular physics
• Collisions involving surfaces and condensed matter
• Experimental technique

… and related topics

Program

Plenary Lectures

An overview of heavy ion interaction: from fundamental science to application

Ronnie Hoekstra
Zernike Institute for Advanced Materials, University of Groningen
Advanced Research Center for Nanolithography (ARCNL), The Netherlands

Positronium physics

Yasuyuki Nagashima
Department of Physics, Tokyo University of Science, Japan

VUV photodynamics in chiral systems

Laurent Nahon
Synchrotron SOLEIL, France

Rydberg atoms: from spectroscopy to quantum technologies

Hossein Sadeghpour
ITAMP, Center for Astrophysics, Harvard & Smithsonian, USA

Femtosecond and attosecond dynamics in liquid water

Linda Young
Argonne National Laboratory, USA
The James Franck Institute and Department of Physics, The University of Chicago, USA

Progress Reports (Invited Speakers) (Confirmed)

Photon

Lepton

Heavy Particles, Cold Matter

Tutorial

Public Lecture

The City of Sapporo and Travel information

The city of Sapporo, one of the largest cities in Japan with a population of over 1 million, locates in the heart of the northern Island Hokkaido in Japan.
Located in the north of Japan, Sapporo is relatively comfortable even in summer. ( 17–26 °C (63–79 °F) ) It is a convenient place to get in touch with nature and offers cultural experiences, including good food and drink that you can't get in the main island of Japan. It has hosted the Winter Olympic Games in 1972.

From overseas, access is convenient via Haneda/Narita Airports (Tokyo) or Kansai Airport (Osaka/Kyoto). Sapporo is very accessible for convention participants as several international and domestic air routes are directly connected to New Chitose Airport. Connecting flights via Tokyo, Osaka, and Nagoya within the same day to Sapporo are available for many major international flights.

Accommodation

Sapporo offers a broad range of hotels. More detailed information is available on the Accommodation page.

Conference Venue

Sapporo Convention Center (Sapporo, Hokkaido, Japan)
The venue is in the city center, being convenient to access using subway.
More detailed information is available on the conference venue page.

Satellite Meetings

ICPEAC has a long tradition of being accompanied by thematically focused satellite meetings. During the days just before and after ICPEAC 2025, we expect the following satellite meetings to be organized in Japan. Up-to-date information is available on the Satellite Meetings page.

ISWAMP2025

8th International Symposium on Intense Field, Short Wavelength Atomic and Molecular Processes
25-27 July 2025, Nagoya, Japan

ISIAC2025

29th International Symposium on Ion-Atom Collisions
25-27 July 2025, Kyoto, Japan

EPIC-MAN 2025

3rd meeting on Electron, Photon, and Ion Collisions with Molecular and Atomic Nanostructures
28 July 2025, Sapporo, Japan

COPIAMC 2025

23rd International Symposium on Correlation, Polarization and Ionization in Atomic and Molecular Collisions
7-9 August 2025, Tokyo, Japan

POSMOL2025

XXII International Workshop on Low-Energy Positron and Positronium Physics and XXIV International Symposium on Electron-Molecule Collisions and Swarms
7-10 August 2025, Matsue, Japan

Related Meeting

Up-to-date information is available on the Related Meeting page.

APiP2025

22nd International Conference on Atomic Processes in Plasmas
21-25 July 2025, Tokyo, Japan

ICPEAC Committees

Executive Committee members

Local Organizing Committee officers

	Name	Affiliation	Country	Website
Chair	Toshiyuki Azuma	RIKEN, Japan	Japan	RIKEN, Japan
Co-Chair	Kenichi Ishikawa	Univ. Tokyo, Japan	Japan	Univ. Tokyo, Japan
	Masahiko Takahashi	Tohoku Univ., Japan	Japan	Tohoku Univ., Japan
	Naoki Watanabe	Hokkaido Univ., Japan	Japan	Hokkaido Univ., Japan

General Committee members

Name	Country	Name	Country
Bobby Antony	India	Michael Lestinsky	Germany
Dariusz Banas	Poland	Chetan Limbachiya	India
Alessandra Barbosa	Brazil	Igor Litvinyuk	Australia
Sadia Bari	Germany	Aleksandar Milosavljevic	France
Diego Boll	Argentina	Toru Morishita	Japan
Iva Brezinova	Austria	Takashi Mukaiyama	Japan
Xiangjun Chen	China	Minna Patenan	Finland
James Cryan	USA	Antonio Picon	Spain
Jan Marcus Dahlström	Sweden	Oksana Plekan	Italy
Alicja Domaracka	France	Chitra Rangan	Canada
Nirit Dudovich	Israel	Daniel Rolles	USA
Agapi Emmanouilidou	UK	Thomas Schlathölter	Netherlands
Rosario González-Férez	Spain	Henning Schmidt	Sweden
Dermot Green	UK	Kirsten Schnorr	Switzerland
Elena Gryzlova	Russia	Lucas Sigaud	Brazil
Alisher Kadyrov	Australia	Filipe da Silva	Portugal
Yasushi Kino	Japan	Andrey Surzhykov	Germany
Jaroslav Kocisek	Czech	Jianmin Yuan	China
Janina Kopyra	Poland	Tanya Zelevinsky	USA
Allen Landers	USA	Shaofeng Zhang	China
Franck Lepine	France