<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Hi all,</div><div class=""><br class=""></div><div class="">We need some help in testing the option PRODUCTIONCUTFORVOLUMES for the simulation. Here are some ideas for volunteers:</div><div class=""><br class=""></div><div class=""><div class="">- semiinclusive (Harut)</div><div class="">- dvcs/dvmp (FX?)</div><div class="">- kLambda (Dan)</div><div class="">- 2 pi (Derek)</div></div><div class=""><br class=""></div><div class="">The production cut for volume (option PRODUCTIONCUTFORVOLUMES) is introduced to speed up simulations using generators that do not include fiducial cuts.</div><div class=""><br class=""></div><div class="">The following should be studied:</div><div class=""><br class=""></div><div class="">1. reconstruction efficiency and simulation times as a function of production cut, for the values (in mm):</div><div class=""> 100, 50, 10, 5, 2, 1</div><div class=""><br class=""></div><div class=""> This study is aimed at verifying that the option does not affect reconstruction efficiency.</div><div class=""><br class=""></div><div class="">2. DC occupancy and simulation times with luminosity beam on target, CLAS12 50% luminosity, for the above values of PRODUCTIONCUTFORVOLUMES</div><div class=""><br class=""></div><div class=""> We know that this cut, at 100mm, reduces the DC occupancy produced by geant4 background by more than a factor of 2.</div><div class=""> Perhaps there is a sweet spot of the value of this cut where the DC occupancy is not affected but the speed is significantly improved</div><div class=""><br class=""></div><div class="">The execution time can be retrieved from the end log of gemc.</div><div class=""><br class=""></div><div class="">Please contact me if you can help with this.</div><div class=""><br class=""></div><div class="">Mauri</div></body></html>