ICIS2003 is the 10th in a series of international conferences on ion sources. The biennial conference brings together scientists working on all aspects of ion sources and their application. ICIS2003 is expected to attract about 200 scientists and engineers from ion source communities all over the world. The primary goal of the conference is to foster the exchange of ideas, results, theories, and techniques in different subfields and areas of application among workers from laboratories and industries around the world. At the conference all topics regarding ion sources will be covered, including ion production, beam transport, ion source-relevant plasma physics, novel techniques in ion sources and related apparatus as well as applications of ion sources and beams.