<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><p class="MsoNormal"><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">Hi all<font face="宋体">，</font></span><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">I</span><span style="mso-spacerun:'yes'; font-family:'Times New Roman'; mso-fareast-font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">’</span><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">ve conducted a virtual experiment of residual stress neutron diffractometer by McStas 1.12c. The sample is shell-like: the outermost material is Al with 6mm thickness , the middle is Fe with 3mm thickness, and the innermost is </span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">solid cylinder of Al. In order to save simulation time for different sample sets, the code has been split into two </span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">parts. Ncount for part 1 is 10E9 and nrepeat for part 2 is 10E4.The simulation result, however, seems abnormal. The</span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; "> intensity detected by final PSD is about 22205.9 n/s with no beam spot found(see figure below)! In the case of </span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">ignoring the outermost Al shell, the intensity is around several hundreds with normal beam spot. So I doubt whether </span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">McStas could deal with more than 2 shells samples.</span></div><div><img src="cid:30aa7deb$1$14e28ac2e55$Coremail$wokaoyan1981$126.com" orgwidth="1403" orgheight="474" data-image="1" style="width: 1203px; height: 406px; border: none;"></div><p class="MsoNormal" style="text-align:center; "><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; "> </span></p><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">I have already attached the two parts of code in enclosure, and will anybody kindly take a few minutes to review them</span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; "> and give a solution to this problem? I am looking forward to your reply. Thank you!</span></div><div><span style="font-family: 宋体; font-size: 10.5pt; line-height: 1.7;">Sincerely yours,</span></div><div><span style="font-family: 宋体; font-size: 10.5pt; line-height: 1.7;">Tom</span></div><div><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; "><br></span></div><p class="MsoNormal"><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; ">Tom</span><span style="mso-spacerun:'yes'; font-family:宋体; font-size:10.5000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p></div><div id="divNeteaseBigAttach" style="clear:both;margin-top:10px;margin-bottom:15px;background:#DEE8F2;padding:4px;font-family:verdana,Arial,Helvetica,sans-serif"><div style="font-size:14px;padding:4px 8px 8px 8px;line-height:16px"><b>从网易126邮箱发来的云附件</b></div><div style="background:#fff;padding:4px"><div style="clear:both;height:36px;padding:6px 4px"><div style="float:left;width:36px"><a href="http://fs.163.com/fs/display/?p=X-NETEASE-HUGE-ATTACHMENT&file=wTI4018NZUW2vElD2_FjreMxu4oK4b69m7cOyYUT34HWJeKdASqfLKiIFl9aRpI89nWJI-w2W8jfVSlI4OXWWw&title=abnormal%20result%20of%20virtual%20experiment"><img border="0" src="http://mimg.127.net/xm/all/fj/ico-bfile-28.gif"></a></div><div><div style="padding:0px;font-size:12px;line-height:14px"><a href="http://fs.163.com/fs/display/?p=X-NETEASE-HUGE-ATTACHMENT&file=wTI4018NZUW2vElD2_FjreMxu4oK4b69m7cOyYUT34HWJeKdASqfLKiIFl9aRpI89nWJI-w2W8jfVSlI4OXWWw&title=abnormal%20result%20of%20virtual%20experiment" download="http://fs.163.com/fs/display/?p=X-NETEASE-HUGE-ATTACHMENT&file=wTI4018NZUW2vElD2_FjreMxu4oK4b69m7cOyYUT34HWJeKdASqfLKiIFl9aRpI89nWJI-w2W8jfVSlI4OXWWw&title=abnormal%20result%20of%20virtual%20experiment" preview="" fileid="undefined" filename="Mysource.dat" filesize="36633055" expiretime="1437793159701" target="_blank" style="color:#000;text-decoration:none">Mysource.dat</a><span style="color:#bbb"> (34.94M, 2015年7月25日 10:59 到期)</span></div><div style="padding:4px 0px;font-size:12px;line-height:14px"><a href="http://fs.163.com/fs/display/?p=X-NETEASE-HUGE-ATTACHMENT&file=wTI4018NZUW2vElD2_FjreMxu4oK4b69m7cOyYUT34HWJeKdASqfLKiIFl9aRpI89nWJI-w2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