In　this　article,　the　preliminary　studies　of　coherent　stimulated　terahertz　radiation　from　intense,　subnanosecond　electron　beam　are　presented.　The　mechanism　of　terahertz　pulse　generation　is　associated　with　self-bunching　of　the　beam　and　slippage　of　the　wave　over　the　whole　electron　flow　This　so-called　Cherenkov　superradiance　(SR)　was　used　to　propose　a　compact　terahertz　generator　with　high　peak　power　A　large　cross　section　(overmoded).　slow　wave　structure　was　designed　to　support　the　high　power　handling　capability,　and　the　mode　competition　was　avoided　by　operating　the　device　in　the　surface　wave　status　With　2.5D　particle-in-cell　simulation,　we　investigated　the　＂hot＂　characteristics　of　the　proposed　superradiant　terahertz　generator　and　found　that　the　SR　peak　power　could　be　further　increased　by　optimizing　the　amplitude　profile　of　electron　pulse　(C)　2010　Wiley　Periodicals.　Inc　Microwave　Opt　Technol　Lett　52　657-662.　2010,　Published　online　in　Wiley　InterScience　(www.interscience.wiley.com)　DOI　10.1002/mop.25019