4 * this program tries helping to understand the amorphous depuration
5 * and recrystallization of SiCx while ion implanation. hopefully the program
6 * will simulate the stabilization of the selforganizing structure in the
10 * - J. K. N. Lindner. Habilationsschrift, Universitaet Augsburg.
11 * - Maik Haeberlen. Diplomarbeit, Universitaet Augsburg.
17 #include <sys/types.h>
21 /* important defines */
24 /* function prototypes */
28 /* global variables */
29 u32 sum_z_cells,sum_c_dist;
30 int random_fd; /* /dev/urandom file descriptor */
36 printf("-a <value> \t slope of nuclear energy loss (default %d)\n",DEFAULT_SLOPE_NEL);
37 printf("-c <value> \t nuclear enery loss at depths 0 (default %d)\n",DEFAULT_START_NEL);
38 printf("-x <value> \t # x cells (default %d)\n",DEFAULT_X_SEG);
39 printf("-y <value> \t # y cells (default %d)\n",DEFAULT_Y_SEG);
40 printf("-z <value> \t # z cells (default %d)\n",DEFAULT_Z_SEG);
41 printf("-s <value> \t # steps to calculate (default %d)\n",DEFAULT_STEPS);
42 puts("-X <value> \t display area intercept point x (default # x celss / 2)");
43 puts("-Y <value> \t display area intercept point y (default # y cells / 2)");
44 puts("-Z <value> \t display area intercept point z (default # z cells / 2)");
45 printf("-d <value> \t refresh every <value> loops (default %d)\n",DEFAULT_DISPLAY_REF_RATE);
46 printf("-r <value> \t pressure range from amorphous SiCx (default %d)\n",DEFAULT_A_P_RANGE);
47 printf("-f <value> \t faktor for pressure from amorphous SiCx (default %f)\n",DEFAULT_A_P_FAKTOR);
48 printf("-p <value> \t p0 for probability of cell getting amorph (default %f)\n",DEFAULT_A_P_P0);
49 printf("-C <value> \t C start concentration (default %d)\n",DEFAULT_C_START_CONC);
50 printf("-S <value> \t slope of linear C distribution (default %d)\n",DEFAULT_C_SLOPE);
54 int make_amorph(cell *cell)
60 int make_cryst(cell *cell)
62 cell->status&=~AMORPH;
66 int distrib_c_conc(cell *cell_p,u32 c_c0,u32 c_slope,int add_c,u32 x_max,u32 y_max,u32 z_max)
68 /* cryst. c to distribute */
72 for(i=0;i<x_max*y_max*z_max;i++) if(!(cell_p+i)->status&AMORPH) cryst_c+=(cell_p+i)->conc;
75 for(j=0;j<x_max*y_max;j++)
77 if(!(cell_p+j+i*x_max*y_max)->status&AMORPH)
82 /* look at cell ... */
83 int process_cell(cell *cell_p,u32 x,u32 y,u32 z,u32 x_max,u32 y_max,u32 z_max,int range,double faktor,double p0)
88 this_cell=cell_p+x+y*x_max+z*x_max*y_max;
89 pressure=p0*URAND_2BYTE_MAX;
90 for(i=-range;i<=range;i++)
92 for(j=-range;j<=range;j++)
94 for(k=-range;k<=range;k++)
96 if(!(i==0 && j==0 && k==0))
98 if((cell_p+((x+x_max+i)%x_max)+((y+j+y_max)%y_max)*x_max+((z+k+z_max)%z_max)*x_max*y_max)->status&AMORPH) pressure+=faktor*URAND_2BYTE_MAX/(i*i+j*j+k*k);
103 if(this_cell->status&AMORPH)
105 /* wrong probability! just test by now ...*/
106 if(rand_get(URAND_2BYTE_MAX)>pressure) make_cryst(this_cell);
109 if(rand_get(URAND_2BYTE_MAX)<=pressure) make_amorph(this_cell);
114 int main(int argc,char **argv)
116 u32 x_cell,y_cell,z_cell; /* amount of segments */
117 u32 x,y,z; /* cells */
118 int i,gr; /* for counting */
119 int slope_nel,start_nel; /* nuclear energy loss: slope, constant */
120 int a_p_range; /* p. range of amorphous sic */
121 double a_p_faktor,a_p_p0; /* p0 and faktor of amorphous sic */
122 u32 c_c0,c_slope; /* c start concentration and linear slope of c distribution */
123 int steps; /* # steps */
125 struct __display display;
126 u32 display_x,display_y,display_z; /* intercept point of diplayed areas */
127 u32 display_refresh_rate; /* refresh rate for display */
128 int quit=0; /* continue/quit status */
130 printfd("debug: sizeof my u32 variable: %d\n",sizeof(u32));
131 printfd("debug: sizeof my cell struct: %d\n",sizeof(cell));
134 x_cell=DEFAULT_X_SEG;
135 y_cell=DEFAULT_Y_SEG;
136 z_cell=DEFAULT_Z_SEG;
137 slope_nel=DEFAULT_SLOPE_NEL;
138 start_nel=DEFAULT_START_NEL;
139 a_p_range=DEFAULT_A_P_RANGE;
140 a_p_faktor=DEFAULT_A_P_FAKTOR;
141 a_p_p0=DEFAULT_A_P_P0;
142 c_c0=DEFAULT_C_START_CONC;
143 c_slope=DEFAULT_C_SLOPE;
148 display_refresh_rate=DEFAULT_DISPLAY_REF_RATE;
150 /* parse command args */
162 slope_nel=atoi(argv[++i]);
165 start_nel=atoi(argv[++i]);
168 x_cell=atoi(argv[++i]);
171 y_cell=atoi(argv[++i]);
174 z_cell=atoi(argv[++i]);
177 steps=atoi(argv[++i]);
180 display_x=atoi(argv[++i]);
183 display_y=atoi(argv[++i]);
186 display_z=atoi(argv[++i]);
189 display_refresh_rate=atoi(argv[++i]);
192 a_p_range=atoi(argv[++i]);
195 a_p_faktor=atof(argv[++i]);
198 a_p_p0=atof(argv[++i]);
201 c_c0=atoi(argv[++i]);
204 c_slope=atoi(argv[++i]);
214 if((random_fd=open("/dev/urandom",O_RDONLY))<0)
216 puts("cannot open /dev/urandom\n");
220 /* calculate sum_z_cells one time! */
222 for(i=1;i<=z_cell;i++) gr+=i;
223 sum_z_cells=z_cell*start_nel+slope_nel*gr;
224 sum_c_dist=z_cell*c_c0+c_slope*gr;
225 printfd("debug: sum_z_cells -> %u\ndebug: sum_c_dist -> %u\n",sum_z_cells,sum_c_dist);
230 printf("malloc will free %d bytes now ...\n",x_cell*y_cell*z_cell*sizeof(cell));
231 if((cell_p=(cell *)malloc(x_cell*y_cell*z_cell*sizeof(cell)))==NULL)
233 puts("failed allocating memory for cells\n");
236 memset(cell_p,0,x_cell*y_cell*z_cell*sizeof(cell));
239 display_init(x_cell,y_cell,z_cell,&display,cell_p,&argc,argv);
246 z=rand_get_lgp(slope_nel,start_nel);
249 distrib_c_conc(cell_p,c_c0,c_slope,i,x_cell,y_cell,z_cell);
251 // process_cell(cell_p+x+y*x_cell+z*x_cell*y_cell);
252 process_cell(cell_p,x,y,z,x_cell,y_cell,z_cell,a_p_range,a_p_faktor,a_p_p0);
255 if((i%display_refresh_rate)==0)
256 display_draw(&display,display_x,display_y,display_z);
259 /* display again and listen for events */
260 display_draw(&display,display_x,display_y,display_z);
261 display_event_init(&display);
265 display_scan_event(&display,&display_x,&display_y,&display_z,&quit);
266 display_draw(&display,display_x,display_y,display_z);
269 display_release(&display);