<html><head></head><body><div><div><br></div><div><br></div><div>On May 25, 2010, at 2:36 PM, Paul Eugenio wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><div><br><br class="Apple-interchange-newline"><blockquote type="cite"><div><b>From: </b>Mukesh Saini <<a href="mailto:msaini@fsu.edu">msaini@fsu.edu</a>><br></div><div><b>Date: </b>May 25, 2010 2:05:04 PM EDT<br></div><div><b>To: </b><a href="mailto:g12@jlab.org">g12@jlab.org</a><br></div><div><b>Subject: </b><b>[G12] GSIM Queries</b><br></div><br><div>Hi All,<br><br>I am trying to setup my Monte-Carlo analysis at FSU. I am unfamiliar with the software and its output and I have questions about the following.<br><br>1) <br>I have the Target defined as g11a in the ffread file:<br><br>MAGTYPE 2<br>MAGSCALE 0.502 0.000<br>PTGIFIELD 0<br><br>STTYPE 1<br>STZOFF -90.0<br>TGPOS 0. 0. 0.<br><br>TARGET 'g11a'<br>TGMATE 'PROT'<br><br>But the code redefines the target material to be He3 *Look Below*. Is that a cause of concern?<br></div></blockquote></div></div></blockquote><div><br></div><div>I don't think that the warning message actually means that your target material was replaced by LHe. It means that somewhere in the code LIQ HELIUM is defined, and then re-defined elsewehere.</div><br><blockquote type="cite"><div><div><blockquote type="cite"><div><br>2)<br>It also says that it is using the slow code. I am assuming there is an option or a way to use the fast code. What is the difference between the two? <br><br>"geom_sc.c I: Using the SLOW CODE !. "<br></div></blockquote></div></div></blockquote><div><br></div><div>When the code was written computers were about 50 times slower than now. Every cpu second counted. Some parts of the code have a "SLOW" = more accurate and "FAST" = quick and dirty, segment of the code. Usually the SLOW code is more reliable.</div><br><blockquote type="cite"><div><div><blockquote type="cite"><div><br>3)<br>In some cases it abandon's tracking and has a huge number of e-/e+ in th event. Does it mean something is wrong or is it a part and parcel of the process? <br><br></div></blockquote></div></div></blockquote><div><br></div><div>You simply have a low energy electron or positron spinning endlessly in the magnetic field. You really do not care to keep tracking it, so it is killed.</div><div><br></div><br><blockquote type="cite"><div><div><blockquote type="cite"><div>=======================================================================================<br><br>*** GSMATE ***: Warning, material redefinition: <br>0MATERIAL A Z DENSITY RADIAT L ABSORP L NMIXT<br><br>3 LIQ HELIUM4 4.000 2.000 0.125 0.755E+03 0.478E+03 1 <br>3 LIQ HELIUM4 4.000 2.000 0.146 0.755E+03 0.613E+03 1 <br>INIT_MG I: *** Starting to set up magnetic field *** <br>INIT_MG I: Magtype used is: 2 <br>INIT_MG I: Ptg_ifield value is: 0 <br>INIT_MG I: reading in magnetic field map from /d/home/clas/g12/parms/bgrid_t.fpk <br>file[ 0]->/d/home/clas/g12/parms/bgrid_t.fpk<-<br>INIT_MG I: Grid used is: 652761 652761 61 41 87 <br>bosClose : close local file<br>bosClose : Call cclose(stream=1,iobptr=0,medium=2)<br>-100<br>INIT_MG I: *** Done reading magnetic field map *** <br>calib_connect: RunIndex_table = "calib_user.RunIndexg12"<br>calib_connect: using server=clasdb.jlab.org (default)<br><br><br>=========================================================================================<br><br>GEOM_EC1_INI: EC1 geometry read normally <br>GEOM_EC1_INI: Attenuation length for all strips replaced with mean value 350 <br>geom_sc.c I: New SC Geometry for 6 independent sectors.<br><br>geom_sc.c I: Using the SLOW CODE !.<br><br>set_sc_version_constants for run 10: flag=1<br><br>=========================================================================================<br><br>*** GTRACK *** More than 10000 steps, tracking abandoned! <br>IEVENT= 88 IDEVT= 88 Random Seeds = 795126914 922246445 <br>Track 5 stack 13 NTMULT 417 POSITRON Time of flight 18.583 ns <br><br><br>*** GTRACK *** More than 10000 steps, tracking abandoned! <br>IEVENT= 97 IDEVT= 97 Random Seeds = 1768665208 1495083300 <br>Track 2 stack 3 NTMULT 32 ELECTRON Time of flight 90.443 ns <br><br><br>*** GTRACK *** More than 10000 steps, tracking abandoned! <br>IEVENT= 111 IDEVT= 111 Random Seeds = 874856696 1948523405 <br>Track 3 stack 7 NTMULT 85 POSITRON Time of flight 19.476 ns <br><br><br>*** GTRACK *** More than 10000 steps, tracking abandoned! <br>IEVENT= 111 IDEVT= 111 Random Seeds = 874856696 1948523405 <br>Track 3 stack 6 NTMULT 86 ELECTRON Time of flight 19.126 ns <br>==========================================================================================<br><br>Apologies for the long copy-pasted info. <br>Mukesh,<br>Graduate Student,<br>Florida State University.<br>_______________________________________________<br>G12 mailing list<br><a href="mailto:G12@jlab.org">G12@jlab.org</a><br><a href="https://mailman.jlab.org/mailman/listinfo/g12">https://mailman.jlab.org/mailman/listinfo/g12</a><br></div></blockquote></div><br></div>_______________________________________________<br>Clas_offline mailing list<br><a href="mailto:Clas_offline@jlab.org">Clas_offline@jlab.org</a><br>https://mailman.jlab.org/mailman/listinfo/clas_offline</blockquote></div><br></body></html>