Geant4 9.6.0
Toolkit for the simulation of the passage of particles through matter
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G4SIunits.hh
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1//
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24// ********************************************************************
25//
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//
72static const double meter = 1.;
73static const double meter2 = meter*meter;
74static const double meter3 = meter*meter*meter;
75
76static const double millimeter = 0.001*meter;
77static const double millimeter2 = millimeter*millimeter;
78static const double millimeter3 = millimeter*millimeter*millimeter;
79
80static const double centimeter = 10.*millimeter;
81static const double centimeter2 = centimeter*centimeter;
82static const double centimeter3 = centimeter*centimeter*centimeter;
83
84static const double kilometer = 1000.*meter;
85static const double kilometer2 = kilometer*kilometer;
86static const double kilometer3 = kilometer*kilometer*kilometer;
87
88static const double parsec = 3.0856775807e+16*meter;
89
90static const double micrometer = 1.e-6 *meter;
91static const double nanometer = 1.e-9 *meter;
92static const double angstrom = 1.e-10*meter;
93static const double fermi = 1.e-15*meter;
94
95static const double barn = 1.e-28*meter2;
96static const double millibarn = 1.e-3 *barn;
97static const double microbarn = 1.e-6 *barn;
98static const double nanobarn = 1.e-9 *barn;
99static const double picobarn = 1.e-12*barn;
100
101// symbols
102static const double mm = millimeter;
103static const double mm2 = millimeter2;
104static const double mm3 = millimeter3;
105
106static const double cm = centimeter;
107static const double cm2 = centimeter2;
108static const double cm3 = centimeter3;
109
110static const double m = meter;
111static const double m2 = meter2;
112static const double m3 = meter3;
113
114static const double km = kilometer;
115static const double km2 = kilometer2;
116static const double km3 = kilometer3;
117
118static const double pc = parsec;
119
120//
121// Angle
122//
123static const double radian = 1.;
124static const double milliradian = 1.e-3*radian;
125static const double degree = (3.14159265358979323846/180.0)*radian;
126
127static const double steradian = 1.;
128
129// symbols
130static const double rad = radian;
131static const double mrad = milliradian;
132static const double sr = steradian;
133static const double deg = degree;
134
135//
136// Time [T]
137//
138static const double second = 1.;
139static const double nanosecond = 1.e-9 *second;
140static const double millisecond = 1.e-3 *second;
141static const double microsecond = 1.e-6 *second;
142static const double picosecond = 1.e-12*second;
143
144static const double hertz = 1./second;
145static const double kilohertz = 1.e+3*hertz;
146static const double megahertz = 1.e+6*hertz;
147
148// symbols
149static const double ns = nanosecond;
150static const double s = second;
151static const double ms = millisecond;
152
153//
154// Mass [E][T^2][L^-2]
155//
156static const double kilogram = 1.;
157static const double gram = 1.e-3*kilogram;
158static const double milligram = 1.e-3*gram;
159
160// symbols
161static const double kg = kilogram;
162static const double g = gram;
163static const double mg = milligram;
164
165//
166// Electric current [Q][T^-1]
167//
168static const double ampere = 1.;
169static const double milliampere = 1.e-3*ampere;
170static const double microampere = 1.e-6*ampere;
171static const double nanoampere = 1.e-9*ampere;
172
173//
174// Electric charge [Q]
175//
176static const double coulomb = ampere*second;
177static const double e_SI = 1.60217733e-19; // positron charge in coulomb
178static const double eplus = e_SI*coulomb ; // positron charge
179
180//
181// Energy [E]
182//
183static const double joule = kg*m*m/(s*s);
184
185static const double electronvolt = e_SI*joule;
186static const double kiloelectronvolt = 1.e+3*electronvolt;
187static const double megaelectronvolt = 1.e+6*electronvolt;
188static const double gigaelectronvolt = 1.e+9*electronvolt;
189static const double teraelectronvolt = 1.e+12*electronvolt;
190static const double petaelectronvolt = 1.e+15*electronvolt;
191
192// symbols
193static const double MeV = megaelectronvolt;
194static const double eV = electronvolt;
195static const double keV = kiloelectronvolt;
196static const double GeV = gigaelectronvolt;
197static const double TeV = teraelectronvolt;
198static const double PeV = petaelectronvolt;
199
200//
201// Power [E][T^-1]
202//
203static const double watt = joule/second; // watt = 6.24150 e+3 * MeV/ns
204
205//
206// Force [E][L^-1]
207//
208static 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
214static const double hep_pascal = newton/m2; // pascal = 6.24150 e+3 * MeV/mm3
215static const double bar = 100000*pascal; // bar = 6.24150 e+8 * MeV/mm3
216static const double atmosphere = 101325*pascal; // atm = 6.32420 e+8 * MeV/mm3
217
218//
219// Electric potential [E][Q^-1]
220//
221static const double megavolt = megaelectronvolt/eplus;
222static const double kilovolt = 1.e-3*megavolt;
223static const double volt = 1.e-6*megavolt;
224
225//
226// Electric resistance [E][T][Q^-2]
227//
228static const double ohm = volt/ampere; // ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns)
229
230//
231// Electric capacitance [Q^2][E^-1]
232//
233static const double farad = coulomb/volt; // farad = 6.24150e+24 * eplus/Megavolt
234static const double millifarad = 1.e-3*farad;
235static const double microfarad = 1.e-6*farad;
236static const double nanofarad = 1.e-9*farad;
237static const double picofarad = 1.e-12*farad;
238
239//
240// Magnetic Flux [T][E][Q^-1]
241//
242static const double weber = volt*second; // weber = 1000*megavolt*ns
243
244//
245// Magnetic Field [T][E][Q^-1][L^-2]
246//
247static const double tesla = volt*second/meter2; // tesla =0.001*megavolt*ns/mm2
248
249static const double gauss = 1.e-4*tesla;
250static const double kilogauss = 1.e-1*tesla;
251
252//
253// Inductance [T^2][E][Q^-2]
254//
255static const double henry = weber/ampere; // henry = 1.60217e-7*MeV*(ns/eplus)**2
256
257//
258// Temperature
259//
260static const double kelvin = 1.;
261
262//
263// Amount of substance
264//
265static const double mole = 1.;
266
267//
268// Activity [T^-1]
269//
270static const double becquerel = 1./second ;
271static const double curie = 3.7e+10 * becquerel;
272
273//
274// Absorbed dose [L^2][T^-2]
275//
276static const double gray = joule/kilogram ;
277
278//
279// Luminous intensity [I]
280//
281static const double candela = 1.;
282
283//
284// Luminous flux [I]
285//
286static const double lumen = candela*steradian;
287
288//
289// Illuminance [I][L^-2]
290//
291static const double lux = lumen/meter2;
292
293//
294// Miscellaneous
295//
296static const double perCent = 0.01 ;
297static const double perThousand = 0.001;
298static const double perMillion = 0.000001;
299
300#endif /* G4UNITSTEST_HH */
pascal
#define pascal
Definition: G4SIunits.hh:213
ns
#define ns
Definition: xmlparse.cc:597