Under the auspices of the IEEE Nuclear Science Symposium, the Deutsches Elektronen Synchrotron (DESY) will host a Joint Workshop on Detector Development for Future Photon Science and High Energy Particle Physics Experiments at DESY in Hamburg, on October 16-17, 2008. The main objective for this joint workshop is to bring together detector experts from both fields, to foster their mutual understanding, and trigger ideas for cooperation. There is a huge potential for cross-fertilization with benefits for both the photon science and particle physics communities. To achieve this, it is important to first understand the different needs of the two communities and identify those areas of development that are of mutual benefit. The workshop will consists of invited talks only, with plenty of opportunities for discussion. At the end of the workshop a round table discussion involving all speakers will take place to address the challenge of "how to build the bridge" between the two communities. This discussion will help point the way forward to bring the often quoted "synergies" to reality. The opening address will be given by Rolf-Dieter Heuer, the 2008 NSS Program Chair.