Nuclear And Particle Physics Flashcards
How is a linac arranged
Cylindrical metal tubes (electrodes) in a straight line
Why do linac electrodes increase in length
So particles spend the same amount of time in each, length increases with velocity
Explain the changing charges of linac electrodes
Adjacent electrodes are connected to the opposite polarity of an alternating voltage
How are electrons released into a linac
Thermionic emission
Where do particles accelerate in a linac
In the gaps due to the resultant force from the electric fields
What is the arrangement of a cyclotron
Two semicircular electrodes called dees with a gap between them
What runs perpendicular to the plane of the dees
A magnetic field
What’s runs across the dees
A high frequency alternating potential dofference
Why does the radius of the particle increase
The particles acceleration in the gap due to the resultant force from electric field
What happens when the particle crosses over from one dee
The electric field changes polarities
What is pair production
A photon is converted into an equal amount of matter and anti-matter
What is the condition of pair production
The photon must have more energy than the total rest energy of both particles
What is annihilation
A particle and it’s corresponding anti-particle collide, resulting in their masses converting into energy and move in opposite direction to conserve momentum
Three baryons
Proton, neutron and lambda particle
Two mesons
Pion and kaon
