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G4SIunits.hh
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26 //
27 // $Id$
28 //
29 // ----------------------------------------------------------------------
30 //
31 // Class description:
32 //
33 // This file is a modified version of SystemOfUnits.h
34 // It is provided for checking the overall 'units coherence' of the
35 // Geant4 kernel.
36 // -------
37 // Warning: if you use it, do not forget to recompile the whole Geant4 kernel
38 // -------
39 // The basic units are those of the International System:
40 //
41 // meter
42 // second
43 // kilogram
44 // ampere
45 // degree kelvin
46 // the amount of substance (mole)
47 // luminous intensity (candela)
48 // radian
49 // steradian
50 //
51 //
52 // The SI numerical value of the positron charge is defined here,
53 // as it is needed for conversion factor : positron charge = e_SI (coulomb)
54 //
55 // The others physical constants are defined in the header file :
56 // PhysicalConstants.h
57 //
58 
59 // Authors: M.Maire, S.Giani
60 //
61 // History:
62 //
63 // 10.03.99 created
64 // 01.03.01 parsec
65 
66 #ifndef G4UNITSTEST_HH
67 #define G4UNITSTEST_HH
68 
69 //
70 // Length [L]
71 //
72 static const double meter = 1.;
73 static const double meter2 = meter*meter;
74 static const double meter3 = meter*meter*meter;
75 
76 static const double millimeter = 0.001*meter;
77 static const double millimeter2 = millimeter*millimeter;
78 static const double millimeter3 = millimeter*millimeter*millimeter;
79 
80 static const double centimeter = 10.*millimeter;
81 static const double centimeter2 = centimeter*centimeter;
82 static const double centimeter3 = centimeter*centimeter*centimeter;
83 
84 static const double kilometer = 1000.*meter;
85 static const double kilometer2 = kilometer*kilometer;
86 static const double kilometer3 = kilometer*kilometer*kilometer;
87 
88 static const double parsec = 3.0856775807e+16*meter;
89 
90 static const double micrometer = 1.e-6 *meter;
91 static const double nanometer = 1.e-9 *meter;
92 static const double angstrom = 1.e-10*meter;
93 static const double fermi = 1.e-15*meter;
94 
95 static const double barn = 1.e-28*meter2;
96 static const double millibarn = 1.e-3 *barn;
97 static const double microbarn = 1.e-6 *barn;
98 static const double nanobarn = 1.e-9 *barn;
99 static const double picobarn = 1.e-12*barn;
100 
101 // symbols
102 static const double mm = millimeter;
103 static const double mm2 = millimeter2;
104 static const double mm3 = millimeter3;
105 
106 static const double cm = centimeter;
107 static const double cm2 = centimeter2;
108 static const double cm3 = centimeter3;
109 
110 static const double m = meter;
111 static const double m2 = meter2;
112 static const double m3 = meter3;
113 
114 static const double km = kilometer;
115 static const double km2 = kilometer2;
116 static const double km3 = kilometer3;
117 
118 static const double pc = parsec;
119 
120 //
121 // Angle
122 //
123 static const double radian = 1.;
124 static const double milliradian = 1.e-3*radian;
125 static const double degree = (3.14159265358979323846/180.0)*radian;
126 
127 static const double steradian = 1.;
128 
129 // symbols
130 static const double rad = radian;
131 static const double mrad = milliradian;
132 static const double sr = steradian;
133 static const double deg = degree;
134 
135 //
136 // Time [T]
137 //
138 static const double second = 1.;
139 static const double nanosecond = 1.e-9 *second;
140 static const double millisecond = 1.e-3 *second;
141 static const double microsecond = 1.e-6 *second;
142 static const double picosecond = 1.e-12*second;
143 
144 static const double hertz = 1./second;
145 static const double kilohertz = 1.e+3*hertz;
146 static const double megahertz = 1.e+6*hertz;
147 
148 // symbols
149 static const double ns = nanosecond;
150 static const double s = second;
151 static const double ms = millisecond;
152 
153 //
154 // Mass [E][T^2][L^-2]
155 //
156 static const double kilogram = 1.;
157 static const double gram = 1.e-3*kilogram;
158 static const double milligram = 1.e-3*gram;
159 
160 // symbols
161 static const double kg = kilogram;
162 static const double g = gram;
163 static const double mg = milligram;
164 
165 //
166 // Electric current [Q][T^-1]
167 //
168 static const double ampere = 1.;
169 static const double milliampere = 1.e-3*ampere;
170 static const double microampere = 1.e-6*ampere;
171 static const double nanoampere = 1.e-9*ampere;
172 
173 //
174 // Electric charge [Q]
175 //
176 static const double coulomb = ampere*second;
177 static const double e_SI = 1.60217733e-19; // positron charge in coulomb
178 static const double eplus = e_SI*coulomb ; // positron charge
179 
180 //
181 // Energy [E]
182 //
183 static const double joule = kg*m*m/(s*s);
184 
185 static const double electronvolt = e_SI*joule;
186 static const double kiloelectronvolt = 1.e+3*electronvolt;
187 static const double megaelectronvolt = 1.e+6*electronvolt;
188 static const double gigaelectronvolt = 1.e+9*electronvolt;
189 static const double teraelectronvolt = 1.e+12*electronvolt;
190 static const double petaelectronvolt = 1.e+15*electronvolt;
191 
192 // symbols
193 static const double MeV = megaelectronvolt;
194 static const double eV = electronvolt;
195 static const double keV = kiloelectronvolt;
196 static const double GeV = gigaelectronvolt;
197 static const double TeV = teraelectronvolt;
198 static const double PeV = petaelectronvolt;
199 
200 //
201 // Power [E][T^-1]
202 //
203 static const double watt = joule/second; // watt = 6.24150 e+3 * MeV/ns
204 
205 //
206 // Force [E][L^-1]
207 //
208 static const double newton = joule/meter; // newton = 6.24150 e+9 * MeV/mm
209 
210 //
211 // Pressure [E][L^-3]
212 //
213 #define pascal hep_pascal // a trick to avoid warnings
214 static const double hep_pascal = newton/m2; // pascal = 6.24150 e+3 * MeV/mm3
215 static const double bar = 100000*pascal; // bar = 6.24150 e+8 * MeV/mm3
216 static const double atmosphere = 101325*pascal; // atm = 6.32420 e+8 * MeV/mm3
217 
218 //
219 // Electric potential [E][Q^-1]
220 //
221 static const double megavolt = megaelectronvolt/eplus;
222 static const double kilovolt = 1.e-3*megavolt;
223 static const double volt = 1.e-6*megavolt;
224 
225 //
226 // Electric resistance [E][T][Q^-2]
227 //
228 static const double ohm = volt/ampere; // ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns)
229 
230 //
231 // Electric capacitance [Q^2][E^-1]
232 //
233 static const double farad = coulomb/volt; // farad = 6.24150e+24 * eplus/Megavolt
234 static const double millifarad = 1.e-3*farad;
235 static const double microfarad = 1.e-6*farad;
236 static const double nanofarad = 1.e-9*farad;
237 static const double picofarad = 1.e-12*farad;
238 
239 //
240 // Magnetic Flux [T][E][Q^-1]
241 //
242 static const double weber = volt*second; // weber = 1000*megavolt*ns
243 
244 //
245 // Magnetic Field [T][E][Q^-1][L^-2]
246 //
247 static const double tesla = volt*second/meter2; // tesla =0.001*megavolt*ns/mm2
248 
249 static const double gauss = 1.e-4*tesla;
250 static const double kilogauss = 1.e-1*tesla;
251 
252 //
253 // Inductance [T^2][E][Q^-2]
254 //
255 static const double henry = weber/ampere; // henry = 1.60217e-7*MeV*(ns/eplus)**2
256 
257 //
258 // Temperature
259 //
260 static const double kelvin = 1.;
261 
262 //
263 // Amount of substance
264 //
265 static const double mole = 1.;
266 
267 //
268 // Activity [T^-1]
269 //
270 static const double becquerel = 1./second ;
271 static const double curie = 3.7e+10 * becquerel;
272 
273 //
274 // Absorbed dose [L^2][T^-2]
275 //
276 static const double gray = joule/kilogram ;
277 
278 //
279 // Luminous intensity [I]
280 //
281 static const double candela = 1.;
282 
283 //
284 // Luminous flux [I]
285 //
286 static const double lumen = candela*steradian;
287 
288 //
289 // Illuminance [I][L^-2]
290 //
291 static const double lux = lumen/meter2;
292 
293 //
294 // Miscellaneous
295 //
296 static const double perCent = 0.01 ;
297 static const double perThousand = 0.001;
298 static const double perMillion = 0.000001;
299 
300 #endif /* G4UNITSTEST_HH */