00001 // -*- C++ -*- 00002 // $Id: SystemOfUnits.h,v 1.3 2007/09/24 15:11:47 hmd Exp $ 00003 // ---------------------------------------------------------------------- 00004 // HEP coherent system of Units 00005 // 00006 // This file has been provided to CLHEP by Geant4 (simulation toolkit for HEP). 00007 // 00008 // The basic units are : 00009 // millimeter (millimeter) 00010 // nanosecond (nanosecond) 00011 // Mega electron Volt (MeV) 00012 // positron charge (eplus) 00013 // degree Kelvin (kelvin) 00014 // the amount of substance (mole) 00015 // luminous intensity (candela) 00016 // radian (radian) 00017 // steradian (steradian) 00018 // 00019 // Below is a non exhaustive list of derived and pratical units 00020 // (i.e. mostly the SI units). 00021 // You can add your own units. 00022 // 00023 // The SI numerical value of the positron charge is defined here, 00024 // as it is needed for conversion factor : positron charge = e_SI (coulomb) 00025 // 00026 // The others physical constants are defined in the header file : 00027 // PhysicalConstants.h 00028 // 00029 // Authors: M.Maire, S.Giani 00030 // 00031 // History: 00032 // 00033 // 06.02.96 Created. 00034 // 28.03.96 Added miscellaneous constants. 00035 // 05.12.97 E.Tcherniaev: Redefined pascal (to avoid warnings on WinNT) 00036 // 20.05.98 names: meter, second, gram, radian, degree 00037 // (from Brian.Lasiuk@yale.edu (STAR)). Added luminous units. 00038 // 05.08.98 angstrom, picobarn, microsecond, picosecond, petaelectronvolt 00039 // 01.03.01 parsec 00040 // 28.04.06 import from CLHEP to GaudiKernel -- HD 00041 // 11.05.06 Rename pascal to Pa to avoid warnings on Windows - MC 00042 00043 #ifndef GAUDI_SYSTEM_OF_UNITS_H 00044 #define GAUDI_SYSTEM_OF_UNITS_H 00045 00046 00047 namespace Gaudi { 00048 namespace Units { 00049 00050 // 00051 // Length [L] 00052 // 00053 static const double millimeter = 1.; 00054 static const double millimeter2 = millimeter*millimeter; 00055 static const double millimeter3 = millimeter*millimeter*millimeter; 00056 00057 static const double centimeter = 10.*millimeter; 00058 static const double centimeter2 = centimeter*centimeter; 00059 static const double centimeter3 = centimeter*centimeter*centimeter; 00060 00061 static const double meter = 1000.*millimeter; 00062 static const double meter2 = meter*meter; 00063 static const double meter3 = meter*meter*meter; 00064 00065 static const double kilometer = 1000.*meter; 00066 static const double kilometer2 = kilometer*kilometer; 00067 static const double kilometer3 = kilometer*kilometer*kilometer; 00068 00069 static const double parsec = 3.0856775807e+16*meter; 00070 00071 static const double micrometer = 1.e-6 *meter; 00072 static const double nanometer = 1.e-9 *meter; 00073 static const double angstrom = 1.e-10*meter; 00074 static const double fermi = 1.e-15*meter; 00075 00076 static const double barn = 1.e-28*meter2; 00077 static const double millibarn = 1.e-3 *barn; 00078 static const double microbarn = 1.e-6 *barn; 00079 static const double nanobarn = 1.e-9 *barn; 00080 static const double picobarn = 1.e-12*barn; 00081 00082 // symbols 00083 static const double nm = nanometer; 00084 static const double um = micrometer; 00085 00086 static const double mm = millimeter; 00087 static const double mm2 = millimeter2; 00088 static const double mm3 = millimeter3; 00089 00090 static const double cm = centimeter; 00091 static const double cm2 = centimeter2; 00092 static const double cm3 = centimeter3; 00093 00094 static const double m = meter; 00095 static const double m2 = meter2; 00096 static const double m3 = meter3; 00097 00098 static const double km = kilometer; 00099 static const double km2 = kilometer2; 00100 static const double km3 = kilometer3; 00101 00102 static const double pc = parsec; 00103 00104 // 00105 // Angle 00106 // 00107 static const double radian = 1.; 00108 static const double milliradian = 1.e-3*radian; 00109 static const double degree = (3.14159265358979323846/180.0)*radian; 00110 00111 static const double steradian = 1.; 00112 00113 // symbols 00114 static const double rad = radian; 00115 static const double mrad = milliradian; 00116 static const double sr = steradian; 00117 static const double deg = degree; 00118 00119 // 00120 // Time [T] 00121 // 00122 static const double nanosecond = 1.; 00123 static const double second = 1.e+9 *nanosecond; 00124 static const double millisecond = 1.e-3 *second; 00125 static const double microsecond = 1.e-6 *second; 00126 static const double picosecond = 1.e-12*second; 00127 static const double femtosecond = 1.e-15*second; 00128 00129 static const double hertz = 1./second; 00130 static const double kilohertz = 1.e+3*hertz; 00131 static const double megahertz = 1.e+6*hertz; 00132 00133 // symbols 00134 static const double ns = nanosecond; 00135 static const double s = second; 00136 static const double ms = millisecond; 00137 00138 // 00139 // Electric charge [Q] 00140 // 00141 static const double eplus = 1. ; // positron charge 00142 static const double e_SI = 1.60217733e-19; // positron charge in coulomb 00143 static const double coulomb = eplus/e_SI; // coulomb = 6.24150 e+18 * eplus 00144 00145 // 00146 // Energy [E] 00147 // 00148 static const double megaelectronvolt = 1. ; 00149 static const double electronvolt = 1.e-6*megaelectronvolt; 00150 static const double kiloelectronvolt = 1.e-3*megaelectronvolt; 00151 static const double gigaelectronvolt = 1.e+3*megaelectronvolt; 00152 static const double teraelectronvolt = 1.e+6*megaelectronvolt; 00153 static const double petaelectronvolt = 1.e+9*megaelectronvolt; 00154 00155 static const double joule = electronvolt/e_SI; // joule = 6.24150 e+12 * MeV 00156 00157 // symbols 00158 static const double MeV = megaelectronvolt; 00159 static const double eV = electronvolt; 00160 static const double keV = kiloelectronvolt; 00161 static const double GeV = gigaelectronvolt; 00162 static const double TeV = teraelectronvolt; 00163 static const double PeV = petaelectronvolt; 00164 00165 // 00166 // Mass [E][T^2][L^-2] 00167 // 00168 static const double kilogram = joule*second*second/(meter*meter); 00169 static const double gram = 1.e-3*kilogram; 00170 static const double milligram = 1.e-3*gram; 00171 00172 // symbols 00173 static const double kg = kilogram; 00174 static const double g = gram; 00175 static const double mg = milligram; 00176 00177 // 00178 // Power [E][T^-1] 00179 // 00180 static const double watt = joule/second; // watt = 6.24150 e+3 * MeV/ns 00181 00182 // 00183 // Force [E][L^-1] 00184 // 00185 static const double newton = joule/meter; // newton = 6.24150 e+9 * MeV/mm 00186 00187 // 00188 // Pressure [E][L^-3] 00189 // 00190 static const double Pa = newton/m2; // pascal = 6.24150 e+3 * MeV/mm3 00191 static const double bar = 100000*Pa; // bar = 6.24150 e+8 * MeV/mm3 00192 static const double atmosphere = 101325*Pa; // atm = 6.32420 e+8 * MeV/mm3 00193 00194 // 00195 // Electric current [Q][T^-1] 00196 // 00197 static const double ampere = coulomb/second; // ampere = 6.24150 e+9 * eplus/ns 00198 static const double milliampere = 1.e-3*ampere; 00199 static const double microampere = 1.e-6*ampere; 00200 static const double nanoampere = 1.e-9*ampere; 00201 00202 // 00203 // Electric potential [E][Q^-1] 00204 // 00205 static const double megavolt = megaelectronvolt/eplus; 00206 static const double kilovolt = 1.e-3*megavolt; 00207 static const double volt = 1.e-6*megavolt; 00208 00209 // 00210 // Electric resistance [E][T][Q^-2] 00211 // 00212 static const double ohm = volt/ampere; // ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns) 00213 00214 // 00215 // Electric capacitance [Q^2][E^-1] 00216 // 00217 static const double farad = coulomb/volt; // farad = 6.24150e+24 * eplus/Megavolt 00218 static const double millifarad = 1.e-3*farad; 00219 static const double microfarad = 1.e-6*farad; 00220 static const double nanofarad = 1.e-9*farad; 00221 static const double picofarad = 1.e-12*farad; 00222 00223 // 00224 // Magnetic Flux [T][E][Q^-1] 00225 // 00226 static const double weber = volt*second; // weber = 1000*megavolt*ns 00227 00228 // 00229 // Magnetic Field [T][E][Q^-1][L^-2] 00230 // 00231 static const double tesla = volt*second/meter2; // tesla =0.001*megavolt*ns/mm2 00232 00233 static const double gauss = 1.e-4*tesla; 00234 static const double kilogauss = 1.e-1*tesla; 00235 00236 // 00237 // Inductance [T^2][E][Q^-2] 00238 // 00239 static const double henry = weber/ampere; // henry = 1.60217e-7*MeV*(ns/eplus)**2 00240 00241 // 00242 // Temperature 00243 // 00244 static const double kelvin = 1.; 00245 00246 // 00247 // Amount of substance 00248 // 00249 static const double mole = 1.; 00250 00251 // 00252 // Activity [T^-1] 00253 // 00254 static const double becquerel = 1./second ; 00255 static const double curie = 3.7e+10 * becquerel; 00256 00257 // 00258 // Absorbed dose [L^2][T^-2] 00259 // 00260 static const double gray = joule/kilogram ; 00261 00262 // 00263 // Luminous intensity [I] 00264 // 00265 static const double candela = 1.; 00266 00267 // 00268 // Luminous flux [I] 00269 // 00270 static const double lumen = candela*steradian; 00271 00272 // 00273 // Illuminance [I][L^-2] 00274 // 00275 static const double lux = lumen/meter2; 00276 00277 // 00278 // Miscellaneous 00279 // 00280 static const double perCent = 0.01 ; 00281 static const double perThousand = 0.001; 00282 static const double perMillion = 0.000001; 00283 00284 } // namespace Units 00285 } // namespace Gaudi 00286 00287 00288 #endif /* GAUDI_SYSTEM_OF_UNITS_H */
1.4.7