PX156 - K4 - synchrotron

• a 'classical accelerator'

• essentially an inverse cyclotron

• particles are accelerated at a constant radius, kept constant by a changing magnetic field

• a circle lined with accelerating RF cavities and magnets to guide the beam

• the strength of the $B$-field changes as the beam particle changes speed

• great for high energy beams

• charged particles under acceleration radiate power: synchrotron radiation

• particles lose energy going around a ring

• energy loss:

• $\frac{1}{r}:$ higher energy loss for small radius
• $(\frac{E}{m}):$ very inefficient to accelerate electrons in a synchrotron

types

• large electron positron collider (LEP)
• HERA - electron-proton collider
• tevatron, fermilab - proton-antiproton collider
• large hadron collider (LHC), CERN - pp collider
• DIAMOND synchrotron light source (SRS)