The 20th European Conference on the Atomic and Molecular Physics of Ionized Gases (ESCAMPIG XX) is organized by the Institute of Physics, Belgrade, Serbia. The conference will take place in Novi Sad, Serbia, on July 13 - 17, 2010, beginning with a welcome reception on Tuesday evening, July the 13th and ending with a workshop on Saturday afternoon, July the 17th.

The ESCAMPIG conference focuses on topics that range from atomic and molecular processes in plasmas and plasma-surface interaction to self-organization in plasmas or to the new research lines with low and high pressure plasma sources. Research in natural plasmas such as space plasmas and the emerging research field of discharge plasmas in the Earth upper atmosphere are also covered.

The first ESCAMPIG was organized in Versailles from 3rd to 5th of April 1973. The members of the committee were J. Berland and C. Manus from France; R. Bleekrode from The Netherlands; P. Lukac from Czechoslovakia; J.B. Hasted and M.C. Sexton from UK and J. Uhlenbusch from Germany. In the years to come ESCAMPIG has expanded, both the list of nations represented in the committee, number of participants and its scope.

Post-conference website contains all accepted abstracts submitted to the conference. This is the final version of the proceedings. A special section of papers stemming from the invited and hot topic papers will be prepared and published in Plasma Sources Science and Technology in the first half of 2011.

The organizers wish to thank all those who found strength, funds and time to attend the meeting in spite global financial crisis, overlapping conferences (and competing) and summer holidays. We also thank the invited speakers for the excellent research that fuels the conference and the International Scientific Committee for their choice of program and general guidance.