The Accelerator Validating Antimatter Physics (AVA) Project

Cosylab
Cosylab
Jun 17 · 5 min read

The Accelerator Validating Antimatter physics (AVA) project is a mix between a research accelerator project and a training program for young researchers funded by the European Union via the H2020 Marie Skłodowska-Curie Actions. This article presents some notions of antimatter and some insight into this exciting program from the point of view of an AVA fellow being mentored at Cosylab.

By Adélaïde Grimaud, Cosylab

What is Antimatter?

Antiparticles are mirror-images of particles with nearly the same properties, except for an opposite electric charge and some other quantum numbers, e.g. the positron is the ‘anti-electron’. When a particle and its antiparticle meet, they annihilate into pure energy.

Figure 1: Particle and Antiparticle

The existence of antiparticles was first theoretically predicted by Paul Dirac in 1928 when he described the behavior of electrons moving near the speed of light. The first antiparticles (positrons) were observed 4 years later and we had to wait until 1955 for antiprotons. Later, we discovered that antiparticles are actually quite commonly created in high-energy natural events such as thunderstorms or radioactive decay.

Why is Antimatter Such a Hot Physics Topic?

Obviously, we are missing something….

Current State of Antimatter Research

Figure 2: A promising research field

Researchers are tackling the question of antimatter by measuring and comparing properties of antiparticles to their matter equivalent.

CERN is at the epicenter of the research community thanks to the AD (Antiproton Decelerator) facility and the ELENA (Extra-Low ENergy Antiproton) project and will be backed by FLAIR (Facility for Low-energy Antiproton and Heavy-Ion Research) at GSI.

ELENA manages to cool the antiparticles down to 100 keV, feeding the different experiments. The main focus is currently on the effect of gravity on antimatter (GBAR and AEGIS), antihydrogen (ALPHA and ATRAP), fundamental symmetries (ASACUSA) and magnetic moments (BASE).

The current technologies used to create antiprotons in the AD, trap them and for their storage are very inefficient. More than 99% of the antiparticles are lost, so there is room for improvement and that’s where the AVA project finds its place.

What is AVA?

The AVA project groups fifteen fellows organized around three work packages tackling the current limitations of antimatter research:

  • design and optimization where the focus is on improving a key part of the accelerator, e.g. the electron gun or control system
  • beam diagnostics where the focus is on detectors to measure the beam profile, position and/or intensity
  • antimatter experiments to design experiments or improve existing experiments to measure the properties of antiparticles.
Figure 3: AVA fellows, and invited speakers at the second AVA workshop in GSI

Life as an AVA Fellow

In addition, the AVA project places great emphasis on scientific outreach to raise public awareness. In partnership with the Institut Image where I did my Masters on virtual reality in 2017, we developed a prototype application to explore a particle accelerator in virtual reality.

Fellows are currently getting ready for the 2nd AVA school and symposium happening in June 2019 in Liverpool by preparing outreach demonstrations and posters explaining our work.

Even though AVA fellows are spread out across Europe collaboration is highly encouraged. We meet every three months for workshops and training schools, where researchers and people from the industry are also invited to share and discuss their work. Cosylab will be hosting the third AVA workshop on human-machine interaction in October 2019.


Dig Deeper

The AVA Partners

Antimatter:

CERN experiments: https://home.cern/science/experiments


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