|Message: Re: High energy PB ion physics?||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)|
Hello Paul, We do not have any model implemented in Geant4 for inelastic collisions of ions at high energies. Developments for this are under discussion, but any implementation will take some time. We are also discussing to implement interfaces to existing external codes , especially for ion induced reactions. This could be available on a shorter timescale, but we would only provide an interface, not the needed external code. A college has an interface for JQMD; this is able to handle ion interaction, but according to documentation not at the energies you would need. I believe QGSJET is valid for at your energies, but we do not have an interface; there is interest in this however elsewhere within the collaboration. Please contact me directly to discuss options how to proceed. Regards, Gunter Paul Anton wrote: > *** Discussion title: Hadronic Processes > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/hadronprocess/843"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Hello, > > I am currently investigating energy deposition in a beam scraper (a > small "collimator") in CERN's SPS accelerator. Basically, I want to see > what happens when a beam of 177 GeV/nucleon Pb-82+ hits this beam > scraper, made of copper. > > I have already done simulations with 450 GeV protons, and it looks > fairly good. The problem is that I use the QGSP physics list, and for > generic ions this list only includes the processes G4MultipleScattering > and G4ionIonisation. ( URL : > http://geant4.web.cern.ch/geant4/support/proc_mod_catalog/physics_lists/hadronic/QGSP.html#GenIon > ) I would also like to see some nuclear inelastic collisions. Ten-digit > accuracy is not interesting, but as a minimum I would like to find the > average energy deposited in the beam scraper per lead ion, plus/minus, > say, 25%. I have a feeling that inelastic collisions will add a huge > amount of energy deposited (this is at least the case with protons!!) > > I have searched this forum, but the only relevant discussion I see is > from 2004 and concludes that there is no such physics functionality yet. > Appreciate any help on this! > -- Gunter Folger e-mail: firstname.lastname@example.org CERN PH/SFT phone: (41)-22-76 79 778
|Inline Depth:||Outline Depth:||Add message:|