particle.py 1.96 KB
 Breno Rilho Lemos committed Nov 22, 2019 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 ``````# -*- coding: utf-8 -*- # Sample Particle class and function that creates N particles, returning a list of particles import math import random # Basic particle class to store bascic information class Particle: def __init__(self, index, x = 0, y = 0, z = 0, charge = 1, mass=0.94): self.iDx=index self.x=x self.y=y self.z=z self.charge=charge self.mass = mass def SetType(self): p_mass = {"Electron":0.000510999, "Pion":0.13957, "Muon":0.105658, "Proton":0.938272, "Kaon":0.493677} self.p_type = "Unknown" for p_type in p_mass: if p_mass[p_type] == self.mass: self.p_type = p_type def PrintPosition(self): print(str(self.x) + " ; " + str(self.y) + " ; " + str(self.z)) def GetPosition(self): return self.x, self.y, self.z # Derived class to computes the time evolution particle positions class ParticlePropagator(Particle): def SetMagneticField(self, B = 0.5): self.B = B def SetProperties(self, Px, Py, Pz): self.Px = Px # unit: Gev/c self.Py = Py # unit: Gev/c self.Pz = Pz # unit: Gev/c self.Velocity = 1/math.sqrt(1+self.mass*self.mass/(Px*Px+Py*Py+Pz*Pz)) # unit: []c self.LorentzFactor = 1 / math.sqrt( 1 - self.Velocity * self.Velocity ) self.Vz = 300 * Pz / self.LorentzFactor / self.mass # unit: meters/micro seconds def Propagate(self, time): Rx = self.Px / (self.charge * self.B) * 3.335641 # unit conversion to meters Ry = self.Py / (self.charge * self.B) * 3.335641 # unit conversion to meters omega = self.charge * self.B / ( self.LorentzFactor * self.mass ) * 89.876 # Angular frequency (unit: radians/micro seconds) Xprop = self.x + Rx * math.sin(omega*time) - Ry * ( math.cos(omega*time) - 1 ) Yprop = self.y + Ry * math.sin(omega*time) + Rx * ( math.cos(omega*time) - 1 ) Zprop = self.z + self.Vz * time return Xprop, Yprop, Zprop``````