Advanced concepts for particle acceleration, beam diagnostics and - PowerPoint PPT Presentation

Advanced concepts for particle acceleration, beam diagnostics and novel sources of coherent radiation Prof I.V. Konoplev John Adams Institute, Department of Physics, University of Oxford, Oxford, UK Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 1

Introduction Volga Oka Volga Oka Nizhny Novgorod, Russia • Education: 1990-1994 : B.Sc. in Physics (First Class, Distinction) Nizhny Novgorod State University, Russia 1994-1996 : M.Sc. in Physics of Plasmas and High-Power RF (First class, Distinction) Nizhny Novgorod State University & Institute of Applied Physics, Russian Academy of Science (RAS), Russia 1996-1997 : M.Phil. in Physics University of Strathclyde (UK) & Institute of Applied Physics, Russian Academy of Science (Russia) 1997- 2001 : Ph.D. in Physics: “Free-Electron Maser with two-dimensional distributed feedback” University of Strathclyde (UK) Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 2

Introduction Glasgow, Scotland, UK Oxford, UK • Research Appointments: 02/2001 – 02/2003: Research Assistant, Department of Physics, University of Strathclyde (HP, 2D FEM) 02/2003 – 04/2005: Research Fellow, Department of Physics, University of Strathclyde (HP, 2D FEM) 04/2005 – 09/2011: Senior Research Fellow, Department of Physics, University of Strathclyde (RF Pulse compression; HP, 2D FEM) 09/2011 – 01/2013: University Lecturer of Accelerator Science, Department of Physics, University of Oxford (cSPr) 01/2013 – present: Associate Professor of Accelerator Science, Department of Physics, University of Oxford (cSPr, UH-FLUX, Medical LINAC) Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 3

At John Adams Institute for Accelerator Science • The JAI's mission is to work with other national (UK) and international accelerator laboratories and institutes, to promote and develop accelerator science. The main objectives of John Adams Institute are: – To train a new generation of accelerator scientists and engineers – To disseminate knowledge about the benefits of accelerator technology to a wide community through outreach projects – To develop novel and advanced accelerator technologies for particle physics and other applications – Commercialisations of the applied accelerator technologies (medical, energy etc.) – To make major contributions to the design and development of new accelerator facilities for particle and nuclear physics – To develop new: scientific facilities such as new light and neutron sources; synergy and collaborations with PP and NP teams Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 4

Advanced concepts for particle acceleration, beam diagnostics and novel sources of coherent radiation Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 5

LINAC-FEL Research at UH 1 . Linac: up to 45MeV, train 1-2ps bunches by with period 350ps, 60pC, s ^ » 100µm Thermionic cathode 2.865GHz ~10keV 3µm with and without feed forward stabilisation system 2 . UH FEL and IC to generate x-ray (10 6 photons per second phase 1 and 10 11 photons in phase 2) Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 6

Outline (1) cSPr single shot non-destructive (2) SRF Dual axis asymmetric bunch profile and microbunching cavity for ERL monitor (sub-ps, fs resolution) Phys. Rev. AB, 19, 083502 (2016) Phys. Rev. AB, 20, 103501 (2017) Appl. Phys. Lett., 113, 243503 (2018) Phys. Rev. ST AB, 17, 052802 (2014) Phys. Rev. AB, 19, 032801 (2016) Appl. Phys. Lett., 111, 043505 (2017) (4) Generation of coherent EM Appl. Phys. Lett. 112, 053501 (2018) fields mediated periodic structures (5) Laser plasma interaction: high (3) Robust LINAC for RT Cancer intensity B fields; microbunching treatment (X-ray bulb) HP tunable cSPr THz radiation sources for society Appl. Phys. Lett., 102, 141106 (2013) Phys. of Plasmas, 25 (4), 043111 (2018) Clinical Oncology, 31, pp.352-355 (2019) Phys. Rev. Appl., 11 (3), 034034 (2019) Scientific Reports, 6, 36139 (2016) https://cerncourier.com/a/developing- J. Phys. D: Appl. Phys., 53, 105501 (2020) Plasma Phys. Control. Fus., 60, 075012 (2018) medical-linacs-for-challenging-regions/ Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 7

Microbunched beam monitoring and bunch profiling using coherent radiation spectrum analysis Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 8

Coherent Smith-Purcell radiation (cSPr) Planar 1D periodic structure Electron beam Metallic grating x æ ö ! 1 ç ÷ observer l = - q cos ç ÷ b q m è ø e-bunch y z Dispersion relation links radiated wavelength and observation angle q x 0 Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 9

Experimental data Experiments at LUCX, KEK facility (<100pC, ~8MeV, 1-2ps long bunches) Spectrum measurements Frequency (THz) Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 10

Single-shot monitor: Concept Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 11

Multi-grating layout • Background radiation is subtracted via polarisation measurements and analysis • Gratings will be longitudinally spaced to avoid geometry problems • Rotated around azimuthal angle to reduce length of the apparatus Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 12

Single-shot design Experimental data and punch profile from FACET, SLAC, USA Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 13

Distance between 2 micro-bunches Experimental set-up Theoretical concept 0.3THz Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 14

Experimental data (KEK) If we assume the conservation of the initial separation (black dotted line). The red line is the experimental data. Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 15

Experimental data: step two To draw theoretical curve (black line) the model has to be adjusted : Position of the individual bunch in respect with the wave Change of the single micro-bunch energy Distance between micro-bunches 16 Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 16

UH-FLUX project High Current Asymmetric Energy Recovery Linac Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 17

UH-FLUX project Scientific Impact : High Current ERLs: for light sources and isotope production, high-energy nuclear physics and high-energy particle physics Magneto-optical system Cryo-module Accelerating section Interaction point ~0.5m ~2m ~0.6m ~5m Decelerating section X-ray, EUV/THz Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 18

UH-FLUX: AERL 7 Cell cavity ! = 1.279688 )*+ ! = 1.099712 )*+ ! = 1.300144 )*+ Operating mode Parasitic asymmetric mode Coupling bridge mode Results observed using CST- Microwave studio Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 19

UH-FLUX: AERL • Aim – To surpass any existing designs of ERL in the e-beam current handling capabilities and footprint Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 20

Scaled down prototype of the cavity 7 cells cavity: 3- accelerating; 3 decelerating and coupling cavity Bead pull pillars 7 cells asymmetric cavity made from 2 blocks of solid aluminium Accelerating section Decelerating section Resonant coupler VNA Bead pull RF measurements test bench Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 21

HOMs measurements HOMs localisation at one or another axis The RF coupler is located on one axis (active) while the field measurements are conducted on both axes Red line active axis Blue line passive axis Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 22

centre of the bridge 14 first HOMs and the Bridge mode Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 23

Cavity optimisation LL&TT+LL cavity TT&LL cavity TT&LL+TT cavity Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 24

UH-FLUX project Surface periodic structures for particle acceleration and THz radiation generation Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 25

Research –overview Coherent EM fields mediated by 2D PSL High impedance surface all metal structures for wakefield acceleration (All Metal Wakefield Accelerator AMWA) and generation of HP coherent THz radiation Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 26

Research –overview High Power MM and sub-MM sources of coherent radiation – Develop tuneable (0.1THz to 3THz) sources of high power (up to 10kW) THz radiation for medical, industrial applications and security – Develop high power mm sources of coherent radiation for Radar, security and research 2D surface lattice Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 27

Concept of tuneable THz radiation source Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 28

Industrial application Application in Ultra-High Intensity source of coherent radiation THz Application : security Quality and contents control >50% of advanced composite materials Seminar at University of Chicago, 10 Nov 2015, A. Seryi, JAI 29