|Message: Re: Different perfomance on Linux and Windows||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
On Sun, 17 Dec 2006, Gorelick Sergey wrote: > *** Discussion title: Hadronic Processes > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/hadronprocess/615"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Hello, > > I don't know really know where this question belongs, but seems to me > that hadronic processes/installation and configuration are the most > related. > > I simulate passage of protons through a system of slits. The material of > the slits is Tantalum. I have Geant4 installed both on a Windows and a > Linux system. The configuration is as follows: > > Windows XP, geant4.8.0.p01, Laptop, Visual C++ compiler Linux Mandriva, > geant4.8.1.p01, Desktop, gcc 4.0.1 > > When the same source code is compiled under Linux and Windows the > results of calcuations performed by the same simulation differ very > significantly. For instance, range of proton (which should be in > principle well established value) in Tantalum are: > > Linux: 1 MeV - approx. 4.6 um (cut-value 100 nm); 2 MeV - approx 14.78 um (cut-value 200 nm) > Windows: 1 MeV - approx. 6.15 um (cut-value 100 nm); 2 MeV - approx. 16.36 um (cut-value 200 nm) > > The differences are in the range of 10-30% and cannot be ignored. The > values for the range given by SRIM are 6.34 um for 1 MeV and 16.9 um for > 2 MeV proton in Tantalum. Value for ranges are the closest for those > calculated using Win-compiled code. > > This strange behavior of the simulation puzzles me and does not allow me > continue calculations. I would be most grateful if you provide me with a > hint of what could be the source of the inconsistency, and how it could > be beaten. > > Thank you. > Hello, I have tried 2 MeV protons in tantalum using Example/extended/electromagnetic/TestEm7 and standrad PhysList. For both cases 1 mm and 0.5 um cut the projectile range is seems to be corrcet. I am using 8.2, however this place should not be changed between 8.1 and 8.2. Now my questions: - do you use standard physics? - why you need such low cuts? VI
|Inline Depth:||Outline Depth:||Add message:|