-- Monica Huerta Parajon Proton Beam Applications group Edificio Cosimet Paseo de Landabarri, 2, 1a Planta 48940 Leioa - Spain http://www.essbilbao.org Tfno.: +34 946 07 66 41 mhuerta_at_essbilbao.org On 3 February 2013 14:31, Paola Sala <paola.sala_at_mi.infn.it> wrote: > Dear Monica, > the available memory space for scoring is 360MB. With a 300x300x300 mesh > the occupancy is 216MB, still below but near. > The overall memory allocation is hard-wired in the library, you have no > possibility to change it. However, my suggestion would be to stick to the > approach you had at the beginning, a fine mesh where the distibutions aare > narrow, a coarse mesh covering tethe rest. Otherwise, the problem would be > not only memory, but also statistics, the "external" thin bins will never > be filled! > > Regards > Paola > > > Dear fluka users, > > > > We are trying to simulate a target room for radiobiological studies with > a > > beam line and with concrete walls and an outside room. We have tried to > > compare two different calculations of the same problem but we are > > obtaining > > different results: > > > > 1. > > > > The proton flux in the whole assembly (10x6x6 meters, 250 bins in > > x,y,z) > > 2. > > > > The proton flux just in the vicinity of the beam window (45x40x40 cm, > > 250 bins in x,y,z) > > > > While 1 offers maximum values of 10E7 protons/cm2·s, 2 offers maximum > > values of 10E9 protons/cm·s. We have assumed that this contradiction is > > due > > to poor accuracy in 1 (not enough bins). However, when trying to run more > > than 300 bins in x, y and z the following error appears: > > > > ******* Stopped in usrbin: insufficient space for allocation in blank > > common ******* > > > > We tracked down the problem and found that this message is generated > > inside libflukahp.a (more precisely, usrbin.o). The question is then if a > > modification of the library is required or if it can be fixed changing > > some > > src code in the flutil package > > > > We would be really grateful if someone could advise us about that. > > > > Thank you for your time > > > > Monica > > > > > > > > > > -- > > > > Mónica Huerta Parajón > > > > Proton Beam Applications group > > > > Edificio Cosimet > > Paseo de Landabarri, 2, 1ª Planta > > 48940 Leioa - Spain > > http://www.essbilbao.org > > > > Tfno.: +34 946 07 66 41 > > mhuerta_at_essbilbao.org > > > > > Paola Sala > INFN Milano > tel. Milano +39-0250317374 > tel. CERN +41-227679148 > > > Paola Sala INFN Milano tel. Milano +39-0250317374 tel. CERN +41-227679148Received on Wed Feb 06 2013 - 18:01:23 CET
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