Jack Salvesen receives the Adams Prize

Award recognizes high performance during the first year of his D.Phil. studies

Jack Salvesen at FCC Week June 2023


I am delighted to have been awarded the John Adams Prize, for my performance during the first year of my DPhil studies in particle physics, focussing on accelerator sciences.


Since arriving to Oxford in October, I have undertaken taught courses in accelerator sciences as part of the John Adams Institute for Accelerator Sciences (JAI), taken lectures in particle physics, statistics and public speaking from the Oxford Physics postgraduate course, been a part of the JAI student design project and moved to CERN to begin my Doctoral studentship and start my research in earnest.


My personal research topic is the design of an Interaction Point feedback system for the Future Circular Lepton Collider, FCCee. This work is part of the Future Circular Collider Innovation Study (FCCIS) [WP2: Collider Design, Task 2.3: Interaction Region and Machine Detector Interface Design].  The Future Circular Lepton Collider (FCCee) is a proposed 91km electron positron collider, located at CERN, Switzerland. The collider is proposed to take precision measurements at 4 key working points (Z, WW, ZH, tt), producing large statistics to aid in our understanding of these particles. The proposed machine parameters have beam sizes on the scale of nanometer height, micrometer width and millimeter length. As such, keeping the beams in precise collision is key to achieving the design luminosity.


My work thus far has involved simulations using the software GUINEA-PIG, to perform strong-strong beam simulations for FCCee across the 4 proposed working points. One key issue is the impact of vibrations, and as such, initial simulations have analysed the effects of offsets in both x and y on the luminosity, beam-beam deflection angle, photon power and pair production rate at the Interaction point. This information aids in determining what input signals are possible for a fast feedback system. Some analysis into the energy spectra of the produced radiation, and emissions angles has also been undertaken. This work, formed the basis of my Transfer of Status at the university of Oxford, and also the basis of a poster I presented at FCC Week 2023 in London (“Initial Studies on Input signals for FCCee Interaction Point Fast Feedback Systems”).


Looking forward, further simulations with more realistic errors and particle bunch distributions have already begun, starting with modelling the “crab waist” collision optics. Looking further forward, the coming months will involve a full analysis of previous and existing feedback systems to support the proposal of a future feedback system. This work will have a significant focus on the system in place (and future developments) at SuperKEKB, Tsukuba, Japan. This machine features similar crab waist collision optics and has a high machine luminosity.