When people ask me what I do, I say: ‘I work on particle accelerators.’ The usual response is a nod and a polite change of subject, because ‘particle accelerator’ sounds extremely technical and slightly dangerous.
So let me fix that.
The Basic Idea
A particle accelerator takes charged particles — electrons, protons, ions — and accelerates them using electric fields. Then it uses magnetic fields to bend and focus the beam of particles.
That’s the core of it. Two types of fields: electric fields to push, magnetic fields to steer.
Why Would You Want to Do That?
Several very good reasons:
1. To study matter at the smallest scales. When particles collide at high energies, they break apart — and the debris reveals the fundamental building blocks of the universe. This is how we discovered quarks, the Higgs boson, and dozens of other particles.
2. To produce X-rays and other radiation for research. Synchrotrons — a type of accelerator — produce X-rays so bright and precise that they can image proteins at atomic resolution. This has enabled thousands of drug discoveries.
3. To treat cancer. Proton therapy uses a particle beam to destroy tumors with incredible precision — delivering maximum damage to the cancer while sparing the surrounding healthy tissue.
What I Actually Work On
My specialty is what happens when the beam doesn’t go where it should. In a perfect accelerator, all the magnets are perfectly aligned, perfectly calibrated. In reality, no magnet is perfect. Errors accumulate. The beam drifts.
My job is to measure that drift and correct it. The beam must follow its ideal path — or ‘orbit’ — with millimeter precision. I use mathematical methods to compute the exact corrections needed, then apply them in real time.
This is called orbit or trajectory correction, and it is one of the first tasks during machine commissioning — when a new accelerator is turned on for the very first time.