An International Pellet Ablation Database L.R. Baylor, A. Geraud * , W.A. Houlberg, D. Frigione + , M. Gadeberg # , T.C. Jernigan, J.de Kloe @ , P. Kupschus # , B. Kuteev § , P. Lang ++ , A.A.M.Oomens @ , A.L. Qualls, K. Sato & , G.L. Schmidt † Oak Ridge National Laboratory, Oak Ridge, TN, USA * Association Euratom - CEA, C.E. Cadarache, St-Paul-Lez-Durance, France + Associazione EURATOM-ENEA, C.R.E. Frascati, Italy # JET Joint Undertaking, Abingdon, OXON, UK § State Technical University, St. Petersburg, Russia ++ Max-Planck Institut fur Plasmaphysik, EURATOM Association, Garching, Germany @ Association Euratom-FOM,FOM-Intituut voor Plasmafysica, Rijnhuizen, The Netherlands & National Institute for Fusion Science, Nagoya, Japan † Princeton Plasma Physics Laboratory, Princeton, NJ, USA Abstract This paper describes the contents of an international pellet ablation database (IPADBASE) that has been assembled to enable studies of pellet ablation theories that are used to describe the physics of an ablating fuel pellet in a tokamak plasma. The database represents an international effort to assemble data from several tokamaks of different magnetic configuration and auxiliary heating methods. In the initial configuration, data from JET, Tore Supra, DIII-D, FTU, TFTR, ASDEX-U, JIPP T-IIU, RTP, and T-10 have been included. The database contains measurements of deuterium and hydrogen pellet ablation, including pellet mass and speed, plasma electron density and temperature profiles, and pellet ablation light emission. A summary of the database contents and a scaling analysis of the data are presented. 1. Introduction In order to predict the effect of fueling the plasma with pellets in a next generation tokamak such as International Thermonuclear Experimental Reactor (ITER), it is essential to have a pellet ablation model that adequately describes the experimental data in the current generation of devices. To date, most studies of experimental pellet ablation have concentrated on data from a single device [1-3] and therefore may not accurately reflect the general applicability of a particular theoretical model. An earlier effort to benchmark pellet ablation models with data from several different tokamaks was performed by Gouge [4] but was limited by the quantity and quality of ablation data. Another recent analysis by Kuteev [5] also examined a limited set of data from several devices. A more controlled set of experimental pellet ablation data is needed in which the pellet speed and size are known accurately and the background plasma parameters (temperature and density profiles) are well measured. It is the purpose of this effort, originating from discussions during the IAEA Technical