AWAKE Beam Line Window: Beam Emittance Blow up Studies
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Transcript of AWAKE Beam Line Window: Beam Emittance Blow up Studies
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AWAKE Beam Line Window:Beam Emittance Blow up Studies
AWAKE Physics Board Meeting
02.07.2014A. Manousos, V. Vlachoudis
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AWAKE WindowIntroduction
AWAKE Physics Board Meeting 02/07/2014
Window: Possible locations.
@ QTSD-QTLD
Beam Parameters: Protons at 400GeV/c Dp/p = 0.1% Np = 3.5 1011 p+ per bunch
1 bunch Gaussian beam Optics Parameters provided by Chiara Normalized Emittances: 3.5mm mrad with dispersion
Geometry: Geometry :
Graphite Cylinder (1.55g/cm3, R=3.5cm, L=0.3cm)
@ QTSD-QTLD
bx 138.599339
ax 10.674844
Dx -0.386052
Dpx
0.030349
by 107.626697
ay -0.023327
Dy 0.072676
Dpy
0.001146
With Dispersion
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AWAKE WindowMirror Position
02/07/2014AWAKE Physics Board Meeting
9.2e+005 protons hit the Mirror
2.9e+008 protons hit the Mirror
300 times larger
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AWAKE Physics Board Meeting4
AWAKE WindowMirror Position
02/07/2014
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AWAKE WindowMirror Position
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowMirror Position
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowMirror Position
02/07/2014AWAKE Physics Board Meeting
Electrons
Photons
Pions+-
GeV/c
GeV/c
GeV/c
From Pions0
Δ(N
part
icle
s/bunch
)Ε/Δ
Ε
Δ(N
part
icle
s/bunch
)Ε/Δ
Ε
Δ(N
part
icle
s/bunch
)Ε/Δ
Ε
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AWAKE Physics Board Meeting8
Conclusions
02/07/2014
Majority of secondary protons still have large energies ~100 GeV -> is this a problem for the mirror?
~100 GeV protons should create a lot of additional secondary particles in that mirror
New Simulations are needed, where the mirror should be included.
Bigger the spot size → Higher the blow-up
Particle maps are available for further tracking studies
Procedure for the evaluation of the Em. Blow up is still under revision
What is really important for what’s downstream?Are the tails important for the plasma cell?Can they perturb the plasma?
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AWAKE Physics Board Meeting9
The End..!!
02/07/2014
Thank You !!!
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AWAKE Physics Board Meeting10
Backup Slides
02/07/2014
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AWAKE Physics Board Meeting11
AWAKE WindowBefore Plasma
02/07/2014
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AWAKE Physics Board Meeting12
AWAKE WindowBefore Plasma
02/07/2014
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AWAKE WindowBefore Plasma
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowBefore Plasma
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowBefore Plasma
02/07/2014AWAKE Physics Board Meeting
Photons
Pions+-
GeV/c
GeV/c
GeV/c
From Pions0
Δ(N
part
icle
s/bunch
)Ε /
ΔΕ
Δ(N
part
icle
s/bunch
)Ε /
ΔΕ
Δ(N
part
icle
s/bunch
)Ε
/Δ Ε
Electrons
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AWAKE Physics Board Meeting16
AWAKE WindowAfter Plasma
02/07/2014
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AWAKE WindowAfter Plasma
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowAfter Plasma
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowAfter Plasma
02/07/2014AWAKE Physics Board Meeting
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AWAKE WindowAfter Plasma
02/07/2014AWAKE Physics Board Meeting
Electrons
Photons
Pions+-
GeV/c
GeV/c
GeV/c
Δ(N
part
icle
s/bunch
)Ε /
ΔΕ
Δ(N
part
icle
s/bunch
)Ε /
ΔΕ
Δ(N
part
icle
s/bunch
)Ε /
Δ
Ε