#ifndef CONSTANTS_HPP
#define CONSTANTS_HPP

namespace constants {
    const double k_e = 1.38935333e5; // Unit: u * um^3 / (us^2 * e^2), Coulomb's constant
    const double tesla = 9.64852558e1; // Conversion factor from tesla to u/(us * e)
    const double volt = 9.64852558e7; // Conversion factor from volt to u * um^2 / (us^2 * e)
    const double meter = 1e6; // Conversion factor from meter to micrometer
    const double second = 1e6; // Conversion factor from second to microsecond
    const double amu = 1.0; // Atomic mass unit in terms of itself (u)
    const double elementary_charge = 1.0; // Elementary charge in terms of itself (e)
}
#endif