electron-tantalum c c electron beam incident on tantalum converter --> checking thickness c c -------------------------- Input Information ----------------------------- 80 c c c c ------------------------ End Input Information --------------------------- 80 c c ----------------------------- Cell Cards --------------------------------- 80 1 8 -7.85 -102 $SS Table Top 2 6 -16.65 -403 $Tantalum target 3 0 -201 $Vacuum region for tallying electrons entering in front of Ta 4 0 -202 $Vacuum region for tallying electrons entering behind Ta 5 0 -602 -600 601 $Vacuum region showing location of source 6 7 -0.001225 -101 #1 #2 #3 #4 #5 $Air inside everything, outside all other materials 7 0 101 $Particle Graveyard c --------------------------- End Cell Cards ------------------------------- 80 c ---------------------------- Surface Cards ------------------------------- 80 c ROOM AIR $Room air box: coordinates of corner followed by vectors 101 BOX -10 -10 -5 20 0 0 0 20 0 0 0 15 c Stainless Steel Table 102 BOX -5 -5 0 10 0 0 0 10 0 0 0 0.3175 $Steel table top (1/8" thick, 2'x4') c Vacuum zones for tallies 201 rcc -1.1 0 2.5 0.1 0 0 2 $region for tallying electrons entering in front of Ta 202 rcc 0 0 2.5 0.1 0 0 2 $region for tallying electrons entering behind Ta c Tantalum Target A 403 rcc -1 0 2.5 0.2 0 0 2 $Tatalum target, th ~ 0.2 cm c Cylindrical region with a Surface Source near the tantalum side 600 px -1.2 $Slightly larger radius as tantalum - volume just to show where source is located 601 px -1.3 602 c/x 0 2.5 2.01 c c -------------------------- End Surface Cards ----------------------------- 80 c ----------------------------- Data Cards --------------------------------- 80 c Materials c Material 6: "Tantalum" (-16.65 g/cm^3) c Constituents (atom %): c Ta181-73181 (1) m6 73181 1.0 c c Material 7: "Air" (-0.001225 "g/cm^3") m7 6012. 0.00015 7014. 0.784431 8016. 0.210748 18040. 0.004671 plib=.12p c c Material 8: "Stainless Steel 304" (-7.85 "g/cm^3") c Constituents (atom %): c Fe(nat)-26000 (0.71) Cr(nat)-24000 (0.18) Ni(nat)-28000 (0.08) c Mn55-25055 (0.02) Si(nat)-14000 (0.01) m8 26000 0.71 24000 0.18 28000 0.08 25055 0.02 14000 0.01 plib=.12p c c c Mode mode n e d t h s p a c c Cell Importances (total cells in CELL CARD) imp:n 1 1 1 1 1 1 0 $7 per line imp:e 1 1 1 1 1 1 0 $7 per line imp:d 1 1 1 1 1 1 0 $7 per line imp:t 1 1 1 1 1 1 0 $7 per line imp:h 1 1 1 1 1 1 0 $7 per line imp:s 1 1 1 1 1 1 0 $7 per line imp:p 1 1 1 1 1 1 0 $7 per line imp:a 1 1 1 1 1 1 0 $7 per line c c ---------------------------Phys Cards---------------------------- c format: phys:n emax emcnf iunr J J J coilf cutn J J J c i_int_model i_els_model c in phys:n here, emax = 100MeV, emcn & iunr = 0 coilf = 4 c PHYS:N 100 0 0 J J J 4 -1 J J J 0 0 PHYS:E 100 0 0 0 0 1 1 1 1 0 0 J J 0.917 0.001 $ default values right now PHYS:D 100 J J J 1 PHYS:t 100 J J J 1 phys:h 100 0 -1 j 0 j 1 j j j 0 0 0 0.917 j 0 0 phys:p 100 0 0 -1 0 j 1 c c ----------------------------------------------------------------- c ---------------------------- Sources ---------------------------- c ----------------------------------------------------------------- c Source Definition c Distribution of Energy neutrons: sdef SUR=600 POS=-1.2 0 2.5 VEC 1 0 0 RAD=d1 DIR=1 par=e erg=10 si1 H 0 2.0001 $Source radius - similar to the petri dish outer radius sp1 -21 1 $power law: proportional to radius for even areal dist. c c Histories (or Computer Time Cutoff) nps 1e6 c c ----------------------------------------------------------------- c ---------------------------- Tallies ---------------------------- c ----------------------------------------------------------------- c ----electrons fc144 tally "F144n-ErD3" f144:e ( 3 ) E144 0.1 198i 20 c Energy Bins for incoming/outgoing electrons in the vacuum space before the Tantalum zone c fc154 tally "F154n-Ta" f154:e ( 2 ) E154 0.1 198i 20 c Energy Bins for incoming/outgoing electrons in the tantalum c fc164 tally "F164n-LiD" f164:e ( 4 ) E164 0.1 198i 20 c Energy Bins for incoming/outgoing electrons in the vacuum space after the Tantalum zone c c ----photons fc174 tally "F174n-LiD" f174:p ( 4 ) E174 0.01 1998i 20 c Energy Bins for incoming/outgoing photons in the vacuum space after the Tantalum zone c c c c --------------------------- CUT Cards ------------------------------------ 80 c Below: need to specifically define lower energy cutoffs instead of defaults cut:n j 0 c cut:e j 1e-5 $ testing lost particle errors w/ new geometry cut:d j 1e-3 cut:t j 1e-3 cut:h j 1e-3 $ These are the lower limits of MCNP cut:s j 1e-3 $ This sets the lower energy cutoff to 1keV. cut:p j 1e-3 $ c c -------------------------- Trying DBCN Card------------------------------- 80 DBCN 27J 200000 $Debug card. x28 deals with bank size. c max value of DBCN is 8-byte integer, so up to >18E18? c -------------------------- Trying DBCN Card------------------------------- 80 c c L'Ecuyer 63-bit random number generator (period=9.2E18) rand gen=2 c print -85 -86 -87 -98 c c --------------------------- End Data Cards ------------------------------- 80 c End MCNP Input