A Grid testbed has been established using resources at 12 sites across Canada involving researchers from particle physics as well as other fields of science. We describe our use of the testbed with the BaBar Monte Carlo production and the ATLAS data challenge software. In each case the remote sites have no application-specific software stored locally and instead access the software and data via AFS and/or GridFTP from servers located in Victoria. In the case of BaBar, an Objectivity database server was used for data storage. We present the results of a series of initial tests of the Grid testbed using both BaBar and ATLAS applications. The initial results demonstrate the feasibility of using generic Grid resources for HEP applications.
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