A beam driven plasma wakefield linear collider pwfa lc from higgs factory to multi tev
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A Beam Driven Plasma-Wakefield Linear Collider: PWFA-LC From Higgs Factory to Multi- TeV. J.P Delahaye / SLAC On behalf of the E200 Collaboration

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A beam driven plasma wakefield linear collider pwfa lc from higgs factory to multi tev

A Beam Driven Plasma-Wakefield Linear Collider:PWFA-LCFrom Higgs Factory to Multi-TeV

J.P Delahaye / SLAC

On behalf of the E200 Collaboration

E.Adli, M.J. Hogan, S. Corde, R.J. England, J. Frederico, S.J. Gessner, S. Li, M.D. Litos, T.Raubenheimer, Z. Wu, (SLAC, Stanford, USA),

C. Joshi, W. An, C.E. Clayton, K.A. Marsh, W. Mori, N. Vafaei-Najafabadi

(UCLA, Los Angeles, USA),

W. Lu (Tsinghua Univ. of Beijing, China and UCLA)

P. Muggli (MPI, Munich, Germany)

Thanks for slides from

M.Hogan, E.Adli, S.Gessner


A beam driven plasma wakefield linear collider pwfa lc from higgs factory to multi tev

Energy reach

e-

e+

Luminosity

source

main linac

beam delivery

Multi-TeV Linear Colliders challenges

  • Limitation by practicalities:

    • Wall plug power: mitigation power to beam transfer efficiency

      • Wall plug power <300MW @ 3TeV,

  • L0.01 = 2.1034 20 MW/beam

    • Cost : mitigation by high accelerating gradient

      • Total extension < 10km @ 3TeV

      • Each linac < 2.5 km

Wall plug to beam

efficiency > 13%

Effective Accelerating

Gradient ~ 1 GV/m



Gradient and efficiency in linear colliders
Gradient and efficiency in Linear Colliders

Beam-driven Plasma

Wake-Field Accelerator

(PWFA)


Plasma acceleration beam driven or laser driven
Plasma Acceleration(Beam-driven or Laser-driven)

Laser pulse or

Witness bunch

>10GV/m

Extremely strong focusing:

Bf=2pehpr

> MT/m

Drive bunch

Excellent power transfer efficiency:

hdrive to plasma ~ 76%,

hplasma to main ~ 66%

hdrive to main > 50%


Facet facility at slac
FACET facility at SLAC

Simulation of 25GeV PWFA stage


10 gvm fields achieved in facet at slac first experimental run april june 2012

E. Adli

@ IPAC'12

>10 GVm fields achieved in FACET at SLAC(First experimental run (April-June 2012)

  • 28 cm plasma cell with fractions of beam

  • decelerated (left) by up to 4 GeV.

  • accelerated (right) by up to 5 GeV,

  • corresponding to a gradient > 10 GV/m.

By varying the imaging energy of the imaging quads we can focus onto the different energy particles. This confirms that the tails observed are actually deceleration and acceleration :


Design of an optimum plasma cell quickpic simulation idre ucla
Design of an optimumPlasma cell QuickPICsimulation(IDRE/UCLA)

hdriveto plasma ~ 76%,

hplasma to main ~ 66%

hdrive to main > 50%


Witness bunch evolution
Witness bunch evolution

(up to granularity of simulation)


Novel concept of a beam driven pwfa linear collider a 2 5km higgs factory 250m acceleration
Novel concept of a beam driven PWFA Linear Collider : A 2.5km HIGGS Factory (250m acceleration)


A beam driven plasma wakefield linear collider pwfa lc from higgs factory to multi tev

  • Beam parameters and luminosity similar to ILC but in a single bunch operation mode with flexible time interval

  • CW mode at high repetition frequency and large interval/bunches:

    • 12.5kHz repetition frequency (80ms)

  • One main bunch accelerated by one drive bunch per stage (25 GeV)

  • Drive beam accelerated to 25 GeV by 2*3.6 SC CW recirculating linac (a la CEBAF)

    • excellent efficiency (40%) and reasonable cryogenics (16MW)

  • Reduced dimensions due to high plasma acceleration gradients:

    • 7.6 GV/m with 13% filling factor thus effective accelerating field of 1 GV/m

  • Excellent efficiency

    • Beam acceleration: 20%

    • Overall wall-plug to beam: 9%@ 250GeV to 15%@ 3TeV

  • Upgradable over large energy range from HIGGS factory to 3 TeV


Lepton colliders main parameters higgs factory
Lepton colliders main parameters HIGGS factory single bunch operation mode with flexible time interval


Pwfa main parameters
PWFA main parameters single bunch operation mode with flexible time interval


Luminosity
Luminosity single bunch operation mode with flexible time interval


Drive beam wall plug power and efficiency
Drive beam , wall plug power and efficiency single bunch operation mode with flexible time interval


Efficiency versus accelerating gradient
Efficiency versus accelerating gradient single bunch operation mode with flexible time interval


Wall plug
Wall plug single bunch operation mode with flexible time interval


Pulsed mode
Pulsed mode single bunch operation mode with flexible time interval

Drive linac

feasibility?

Similar bunch structure and beam parameters as the ILC


An alternative ilc upgrade by pwfa from 250gev to 1 tev and beyond
An alternative ILC upgrade by PWFA single bunch operation mode with flexible time intervalfrom 250GeV to 1 TeVand beyond?

400m

ILC TeV

upgrade

One possible scenario could be:

1) Build & operate the ILC as presently proposed up to 250 GeV (125 GeV/beam): total extension 21km

Develop the PFWA technology in the meantime (up to 2025?)

When ILC upgrade requested by Physics (say up to 1 TeV), decide for ILC or PWFA technology:

4) Do not extend the ILC tunnel but remove latest 400m of ILC linac (beam energy reduced by 8 GeV)

5) Install a bunch length compressor and 16 plasma cells in latest part of each linac in the same tunnel for a 375+8 GeVPWFA beam acceleration (382m)

6) Reuse the return loop of the ILC main beam as return loop of the PWFA drive beam


Ilc upgrade from 250 gev to 1 tev by pwfa
ILC upgrade from 250 single bunch operation mode with flexible time intervalGeV to 1 TeV by PWFA


Issues and challenges to be addressed by specific r d
Issues and challenges single bunch operation mode with flexible time intervalto be addressed by specific R&D

  • Witness bunch acceleration by separate drive bunch

  • Beam loading scenarios with low momentum spread

  • Emittance preservation during acceleration

  • Drive to main beam power transfer efficiency

  • Multi-stage acceleration

  • Alignment tolerances and instabilities (hose, head erosion)

  • Positron acceleration

  • Plasma recovery between pulse and heat deposition

  • Multi-MW Super-conducting linac for drive beam generation and limitation by stored energy (specially in pulsed mode)


A beam driven plasma wakefield linear collider pwfa lc from higgs factory to multi tev

Challenges for Positron single bunch operation mode with flexible time interval

Plasma Wakefield Acceleration

Positron Witness Bunch

Electron Drive Bunch

Positive Ion Background

Accelerating and Defocusing

Field for Positrons

Decelerating and Focusing

Field for Electrons

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Conclusions
Conclusions single bunch operation mode with flexible time interval

PWFA a very promising technology:

Very high accelerating fields: effective 1 GV/m

Excellent power efficiency ( Wall-plug to beam 20%)

  • Great flexibility of time interval

    • CW or pulsed mode of operation

    • An alternative for ILC energy upgrade?

  • Many challenges still to be addressed;

    • Beam quality preservation, efficiency, positrons?

    • Ambitious test facilities: FACET and FACET2

    • Feasibility addressed early next decade?

  • Thanks to excellent and expert collaboration: E200