PLASMED X: COMPACT TUNABLE X-RAY SOURCE - Simon Bohlen, Theresa Brümmer, Florian Grüner, Martin Meisel, DESY Indico
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7th Matter & Technology Meeting | 02.02.2021
PLASMED X: COMPACT TUNABLE X-RAY SOURCE
Simon Bohlen, Theresa Brümmer, Florian Grüner, Martin Meisel,
Lucas Schaper, Theresa Staufer, Jon Wood, Kristjan Põder, Jens Osterho
Research Group for Plasma Wake eld Accelerators
Deutsches Elektronen-Synchrotron DESY, Machine Division, Hamburg, Germany
Accelerator Research and Development, Matter and Technologies
Helmholtz Association of German Research Centres, Berlin, Germany
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A new light source for XFI
Innovation Pool project to unlock the many bene ts of XFI
> X-Ray Fluorescence Imaging (1) provides key advantages
> High X-Ray energy reduces dose
> No false positives
> Excellent spatial resolution
> Ability to functionalise nanoparticles
> X-Ray beam must be low divergence, narrowband, bright
> Microfocus tubes: high divergence and bandwidth
> Synchrotrons: inaccessible scale and cost
> …? 10 0
> Compact and a ordable X-ray source required!
> PLASMED X project
> BMBF InnovationPool, 2019-2020 10 -1
Transmission
> Demonstrate an all-optical X-Ray source for XFI of a mouse
phantom
10 -2
1 cm
5 cm
10 cm
10 -3
10 1 10 2
Photon energy / keV
(1) Grüner et al, Sci Rep 8, 16561 (2018) 2
Dr Kristjan Põder | 7th, Virtual MT Meeting | 02.02.2021 | Page 00
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The PLASMED X light source
A unique combination of novel technologies results in a peerless light source
> Laser driven electron source - ultra-compact
> Plasma based electron optics for beam manipulation X-rays
> Allows for restricted bandwidth and tuning
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> Very strong focussing elds - ultra-compact ag
le m
> Thomson scattering for X-ray generation Scattering laser i p o
D
> Undulator with a period of microns - ultra-compact
> X-ray energy predominantly determined by electron
beam
> Radiation with low divergence
LPA laser
Active plasma
lens
2
Plasma 2 (1 cos ↵) 2
source ~! = ~!L ⇠ 4 ~!L
1 + a20 /2 + 2 ✓2
3
Dr Kristjan Põder | 7th, Virtual MT Meeting | 02.02.2021 | Page 00
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Compact, narrowband, tunable X-ray source
First demonstration of LPA and APL combination for X-ray generation
> Commissioned a robust laser plasma accelerator electron
source (1)
> Stable operation over 8 h demonstrated
> Developed theoretical concept showing bandwidth
narrowing (2) and tuning (3) with active plasma
a lens (4)
> Constructed proof-of-principle machine with APL enabled Compton
spectrum control interaction
> First demonstration of restricted bandwidth! (5)
> First demonstration of X-ray tuning (5) Plasma lens
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Gas jet
la ter
FA se
at
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Sc
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(1) Bohlen et al, in preparation
(2) Brümmer et al, PRAB 23 (2020)
(3) Brümmer et al, in preparation
(4) van Tilborg et al, PRL 115 (2015)
4
Dr Kristjan Põder | 7th, Virtual MT Meeting | 02.02.2021 | Page 00
(5) Meisel et al, in preparation
Successful detection of uorescence signal
PLASMED X source shown to excite uorescence in medically-used nanoparticles
> Proof-of-principle experiments with the PLASMED X
source
> Detection of uorescence from gold nanoparticles
> Detection of uorescence from gadolinium
nanoparticles
> XFI imaging of mouse phantom upcoming
> Foreseen in Q1 2021
> Custom-designed detectors to be tested in Q2 2021
5
Dr Kristjan Põder | 7th, Virtual MT Meeting | 02.02.2021 | Page 00
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flPLASMED X all-optical X-ray source for XFI
Successful demonstration of compact tunable light source for medical imaging
> Proof-of-principle demonstration of an all-optical X-Ray
source for XFI on a mouse phantom
> BMBF InnovationPool 2019-2020
> Aim to continue with 3rd party technology-transfer funding
> Robust laser plasma accelerator electron source commissioned
> Successfully detected uorescence from medically-used
nanoparticles
> First demonstration of bandwidth narrowing and tunability by an
APL
> Custom-designed X-ray detectors from KIT to be tested Q2 2021
> Next step: Imaging of mouse phantom
> Future: high rep rate implementation @ KALDERA
2 2 (1 cos ↵) 2
~! = ~!L ⇠4 ~!L 6
Dr Kristjan Põder | 7th, Virtual MT Meeting | 02.02.2021 | Page 00
1 + a20 /2 + 2 ✓2
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