Electric Fields Flashcards
Left hand grip rule
Middle finger = Current Direction
First finger = Magnetic field direction
Thumb = Force direction
Right Hand Grip Rule
Thumb is direction of the current
Fingers curl in magnetic field direction
Towards = Anti-Clockwise lines
Away = Clockwise lines
Linear Accelerator Advantages and Disadvantages
High cost as a result of shielding and building requirements because Accelerator must be long
Cyclotron advantages and disadvantages
Smaller than linear accelerator - cheaper to build
- Path radius increases as particle increases velocity - moves towards Dee edge
At high velocity relativistic effects interfere with efficiency making it difficult to adapt fields in line with particle
Synchrotron (type of cyclotron) advantages/disadvantages
Energy loss caused by synchrotron radiation being emitted
Synchrotron built to produce this at certain frequencies for scientific and medical purposes
Rather than accelerate particles
Which accelerator is used to produce high energy photons across a range of frequencies?
Synchrotron
Synchrotron Description
Electric fields adapted to produce energetic, narrow ring of charged particles at high energies
Magnets bend and focus particles
Particles accelerated and forced to collide
Remnants detected and analysed
Linear Accelerator description
Charged particle attracted towards drift tube plate
Passes through and us accelerated towards next tube…next tube
Field in between each tube must change rapidly so that each new tube attracts particle leaving previous one
Kept in line by magnets
Cyclotron description
Magnets keep circular orbit
High frequency supply accelerates particles
Two Dee’s with small gap and high Potential difference in between
Charged particle accelerated across and bent inside a dee until in opposite direction
Goes between dees until at correct energy to be released
Phenomenon which provided evidence for the particulate nature of light
Photoelectric effect
Why an ALTERNATING voltage is used in a cyclotron?
Used to change the direction of the force on protons
Electric field must change direction in order to accelerate the protons because direction which protons are crossing gap keeps changing
Why an ALTERNATING voltage is used in a cyclotron?
Used to change the direction of the force on protons
Electric field must change direction in order to accelerate the protons because direction which protons are crossing gap keeps changing
