<html><body>Hi Elton,<div><br></div><div><br></div><div>We have 2 types Hamamatsu units which were are testing. These are H10570 SEL which uses an 8 stage R9779 tube and H10534 SEL which uses a 10 stage R9779 tube. We are focusing our studies on the 10 stage units for use in the TOF. </div><div><br></div><div><div>H10534 SEL</div><div>[ 2" Head On PMT for TOF, R9779 w/ 10</div><div>stages, selected for gain min = 1E+06,</div><div>Bialkali photocathode, , 1.8nS rise</div><div>time, 250pS TTS, active voltage divider</div><div>for high linearity, magnetic, per</div><div>attached drawing; </div></div><div><br></div><div><br><div apple-content-edited="true"> <div><div><div><div>--</div><div>Prof. Paul Eugenio</div><div>Florida State University</div><div>Department of Physics</div><div>Tallahassee, Florida, USA 32306</div><div><br></div><div>(850) 644-2585</div><div><a href="mailto:eugenio@fsu.edu">eugenio@fsu.edu</a></div><div><br></div></div></div></div><br class="Apple-interchange-newline"> </div><br></div><div></div></body></html>