AWAKE Primary Beamlines

C. Bracco, J. Bauche, B. Goddard, E. Gschwendtner, G. Le Godec, L. Jensen,

M. Meddahi, J.A. Osborne, A. Pardons, H. Vincke

Outline TT61 Option:

Preliminary Layout and Optics Studies RP and Geometric Constraints Limitations and Possible Solutions Requirements and Time Estimates

CNGS Option: Requirements and Time Estimates

Electron Beam Line

AWAKE in TT61 Line

TT60 from SPS

TI 2 to LHC

HiRadMat facility

TT61 tunnel to west hall

HiRadMat primary beam line (TT66)

AWAKE in TT61 LineBeam from SPS

HiRadMat primary beam line (TT66), fully operational, no changes in layout expected

New AWAKE beam line. Large slope of 8.5 % of TT61 tunnel some equipment of previous H3 beam line in TT61 tunnel still present

Modification of TT66

8 new switching magnets

T1 target shielding dismantled available free space for switch magnets

TT61 Existing Tunnel

8.5% slope = 4.85°

Old line: 200 GeV beam Br ~ 670 T m (protons)

New line: 450 GeV beam Br ~ 1530 T m (protons)

~1.2 m

TT61 Gallery cross section

TT4-TT5: RP Constraints

Dump 2 m underground Beam deflected by 2°

Lase

r

Plasma

Cell

Dump

1 QTLD

3MBA

2 QTLF

2 QTLF

3 QTLD

1MBB

2°

MBB and MBA: B = 2.1 T

Beam from TT61: 0 vertical angle Floor

Civil engineering works required!

TT4-TT5 TL Optics Studies Final Focusing

QD QD QD QD

QF QF QF QFMBA MBA MBA MBB

Plasma Cell

At Plasma cell entrance:bx=by=5 max=ay=0 m

QD QD QD QD

QF QF QF QFMBA MBA MBA MBB

Plasma Cell

At Plasma cell entrance:Dx = 0 mDy =-0.2 m

Beam size at Plasma cell entrance: 1 sx = 190 mm1 sy = 280 mm(Dp/p =1E-3)

TT4-TT5 TL Optics Studies Final Focusing

TT4-TT5 Area Layout

Plasma Cell

Dump E. Gschwendtner, MSWG 12/10/2012

TT5TT4

New Service gallery

TT4-TT5 Area Layout

Plasma Cell

Dump E. Gschwendtner, MSWG 12/10/2012

TT5TT4

New Service gallery

Start digging the trench after the service gallery beam higher exit from TT61 at ~2 m (old 200GeV beam exit at ~1.25 m) impact on dump depth!!

Preliminary Beamline Design

+ Old Line•New Line- Tunnel

Magnets:• 8 MBS• 20 vertical bending magnets• 2 horizontal bending magnets• ~ 30 Quads (~20 in TT61 + final focusing)PC:• ~ 10 units

Preliminary Proton Beamline Design

+ Old Line•New Line- Tunnel

TT5 TT4 TT61

The 450 GeV beam does not fit in the existing tunnel !!

dump

Possible solutions

Fit the 450 GeV beam in TT61 impact on beam angle in TT4-TT5 and on dump depth RP studies!

Reduce the beam energy to respect all the geometric and RP constraints check impact on experiment

450 GeV Beam in TT61

+ Old Line•New Line- Tunnel

Magnets:• 8 MBS• 20 vertical bending magnets• 1-2 horizontal bending magnets• ~ 30 Quads (~20 in TT61 + final focusing)PC:• ~ 10 units

450 GeV Beam in TT61+ Old Line•New Line- Tunnel

dump

TT5 TT4 TT61

~1.2° angleDump depth: ~0.5 mLimit in operation (t.b.d. by RP)

Lower Energy: 300 GeV

dump

~2° angleDump depth: 1.5 m

Magnets:• 8 MBS• ~17 vertical bending magnets• 1 horizontal bending magnets• ~ 30 Quads (~20 in TT61 + final focusing)PC:• ~ 10 units

Impact on Beam Size at 300 GeVGeometric emittance e = 10.9 nm instead of e = 7.2

nm b = 5m = 234 s mm instead of 200 mm b = 3.7 m = 200 s mm: feasible!

Plasma Cell

At Plasma cell entrance:bx=by=3.7 max=ay=0 m

Aperture ok

Magnets and Power Converters

Magnets: 8 Switches ~ 20 vertical bending magnets 1-2 horizontal bending magnets # Horizontal and vertical correctors t.b.d ~ 30 Quadrupoles

Power Converters: ~10 units

Two options: Design and build new magnets and PC 3 years from

specifications + cabling Re-use existing equipment (inventory needed) cabling anyhow

needed (no manpower available during LS1) In both cases: first beam in 2017

CNGS Option

Minor modifications of the final focusing system Magnets and PC already available and in place Beam instrumentation already available and in

place Re-cabling and new services needed (?) Possible to increase the energy from 400 GeV to

440 GeV (some margin from 450GeV LHC beam needed for interlock system) really needed?

First beam in 2015 might be feasible (depending on re-cabling/services)!

Electron Beam Line

No studies have been performed up to now Normally less critical than proton beam (low

energy electrons) Design and production of magnets and PC:

TT61: in the noise of works for proton beam magnets CNGS: if new design needed first e-beam in

~2016(?)

To be defined now: electrons injected from the side of the plasma cell or

at the beginning impact on interface Laser+protons+electrons

Beam parameters

Conclusions

TT61 Option: Feasibility studies indicate that only lower beam energy can be

envisaged (tunnel size, CE work, RP constraints....) From preliminary study of lower energy beam: beam operation not

before 2017 (magnets, all beam line equipments and general services...)

CNGS Option: Most attractive to meet a sooner beam operation Less expensive as beam line and equipment already available Could be staged-installation of the experimental area towards reaching

a complete test facility

If CDR to be ready by March 2013, need to conclude during this collaboration meeting on the beam energy (and Co...) so work can proceed