Novel Materials for Particle Acceleration and EM Wave ...€¦ · Novel Materials for Particle...
Transcript of Novel Materials for Particle Acceleration and EM Wave ...€¦ · Novel Materials for Particle...
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Novel Materials for Particle Acceleration and EM Wave Production
Prof. Rebecca Seviour
Royal Holloway
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
𝒗𝒃𝒆𝒂𝒎 ≲ 𝒗𝒈Energy Transfer from Wave to Beam
𝒗𝒃𝒆𝒂𝒎 ≳ 𝒗𝒈Energy Transfer from Beam to Wave
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Phase constant
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Effective Media
Metamaterial - Pendry/Smith 1990- Veselago 1968
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Effective Media
Kock 1940’s
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Aleksey Tolstoy (1914)
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
<< λ
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
μ
ε
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Wave propagation
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
RFin RFout
Electron Beam
20
dm c γ e vdt
� E
20 1 0
dm c γ e vdt
� E
22 1
1 dγ γ2 dγ
' '
in
20
21
in
out
PeIcmΔγ
dγd
21
PΔP
�
1st order perturbation >> Spontaneous emission
2nd order perturbation >> Stimulated emission
Madey’s Theory
Lorentz's Force
Tan & Seviour, Europhys.Lett.87:34005,2009
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Phase constantTan & Seviour, Europhys.Lett.87:34005,2009
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
20
dm c γ e vdt
� E
20 1 0
dm c γ e vdt
� E
22 1
1 dγ γ2 dγ
' '
in
20
21
in
out
PeIcmΔγ
dγd
21
PΔP
�
1st order perturbation >> Spontaneous emission
2nd order perturbation >> Stimulated emission
Madey’s Theory
Lorentz's Force
Frequency [GHz]
X determined by wave/beam velocity,
X > 0 𝑣𝑏𝑒𝑎𝑚 < 𝑣𝑔
Tan & Seviour, Europhys.Lett.87:34005,2009
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
E field 9.6 GHz π - Mode
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
50 KeV upgrade to our existing electron system
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Yiming Xu and Rebecca Seviour 2012 New J. Phys. 14 013014 doi:10.1088/1367-2630/14/1/013014
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Yiming Xu and Rebecca Seviour 2012 New J. Phys. 14 013014 doi:10.1088/1367-2630/14/1/013014
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
Yiming Xu and Rebecca Seviour 2012 New J. Phys. 14 013014 doi:10.1088/1367-2630/14/1/013014
![Page 27: Novel Materials for Particle Acceleration and EM Wave ...€¦ · Novel Materials for Particle Acceleration and EM Wave Production R. Seviour RF in RF out Electron Beam 2 0 d mc γev](https://reader036.fdocuments.us/reader036/viewer/2022062602/5eacb963e6a87d6bd75d6056/html5/thumbnails/27.jpg)
Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
1 pC, 10 ps short electron bunches,initial energy 16MeV, repetition frequency 3.429GHz
E B
Peak E field 46.8MV/m Peak B field 120.2 kA/m
acceleration gradient of 32MV/m
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour
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Novel Materials for Particle Acceleration and EM Wave ProductionR. Seviour