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RING-RING DESIGNMiriam Fitterer, CERN - KIT

for the LHeC study group

e

DIS 2011, Newport News 12.04.2011Miriam Fitterer - LHeC Ring-Ring Design

e LHeC Design Options


e LHeC Design OptionsLinac-Ring


e LHeC Design OptionsLinac-Ring

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24

UJ 2 7 UA2 7 Point 2

Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS

LHeCe-injecto

r

RF

RF

e

p

Ring-Ring


e General Layout


e General Layout

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24


Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS


e General Layout

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24


Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS

e-injecto

r

LHeC

RF

RF

e

p


e General Layout

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24


Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS

e-injecto

r

LHeC

RF

RF

e

p

0.6 GeVfrom EPA

4 ILC RF-units, 156 m, providing 3.13 GV

3.73 GeV

10 GeV to LHeC

~20 m

6.87 GeV


e General Layout

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24


Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS

e-injecto

r

LHeC

RF

RF

e

p

0.6 GeVfrom EPA


3.73 GeV

10 GeV to LHeC

~20 m

6.87 GeV

Bypass CMSx

z

S.BP E.BP

IP5

- 600 600

20

10

-20

-10

81 m 92 m

124 m free sections


e General Layout

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24


Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS

e-injecto

r

LHeC

RF

RF

e

p

0.6 GeVfrom EPA


3.73 GeV

10 GeV to LHeC

~20 m

6.87 GeV

Bypass CMSx

z

S.BP E.BP

IP5

- 600 600

20

10

-20

-10

81 m 92 m

124 m free sections

!"#

!$#

l*1

l*2

Detector


e InjectorLHeC requires new 10 GeV e+/e- injector

0.6 GeVfrom EPA


3.73 GeV

10 GeV to LHeC

~20 m

6.87 GeV

Injector: simplified and down scaled ELFE design:

Pre-injector: e.g. LIL+EPA type e+/e- Injector (LEP) - 0.6 GeV at extractionTotal filling

time less than

10 minutes

Recirculating linac


e

Electrons ProtonsEnergy 60 GeV 7 TeVCurrent 100 mA 860 mAPart. per bunch 2 ×1010 1.7×1011

Numb. of bunches 2808 2808εx /εy 5.0 / 2.5 nm 0.5 / 0.5 nmPγ < 50 MW

Main Ring Design Parameters


ep-ring and e-ring have to fit into the existing LHC tunnel

Main Ring - Integration I

Typical cross section of the LHC tunnel

LHeCBypasses increase the circumference

compensation by placing the ring more on the inside in respect to the LHC

Match e-ring and p-ring circumference, because:p-beam could be “heated” up by the e-beam in the case of asymmetric collision schemes [*]

[*] K. Hirata and E. Keil, “Barycenter motion of beams due to beam-beam interaction in asymmetric ring colliders,” Proc. EPAC 1990


eMain Challenges:1. QRL jumper connection at every second proton quadrupole in the main

arc and around 8 per straight section

2. Insertions, especially Dump Area, Collimation, RF, Cryogenics ...

Main Ring - Integration II

QRL jumper connection


e

0 20 40 60 80 1000

20

40

60

80

100

120

140

s�m

�Β x,Βy,100Dx100D

y��m

Main Ring - Optics

0 200 400 600 8000

50

100

150

s�m�Β x,

Βy,100Dx100D

y��m

Main Arc:• 2 LFODO, LHeC≈ LFODO, LHC

• FODO lattice with no elements at positions of QRL jumper connection

main integration interferences avoided

Insertions• similar design for even and odd insertions• exemplarily avoiding QRL jumper

connections in insertionsdetailed design for each insertions at a later stage, but no real show stoppers


e Bypass Layout

Bypass CMSx

z

S.BP E.BP

IP5

- 600 600

20

10

-20

-10

81 m 92 m

124 m free sections

-500

Bypass ATLAS

-500 500

x

z

10

20

-10

-20

S.BP1 E.BP1

free sections

38 m 50 m

42 m 42 m

IP1

Injection

arc

invertedbend

straight

normalbend

General Design:Insertion of a straight section into the lattice leads to a separation !

ΔBP LBP Lnew tunnel Ltot, straight sections

ATLAS 16.25 m 1303.3 m ≈1061 m 172 m

CMS 20.56 m 1303.3 m ≈1061 m 297 m

RF

RF


e Bypass Optics

LSSL LSSR

IRTLIR TRIR

DSLSSL DSLSSR

BP Nomenclature

0 500 1000 1500

�50

0

50

100

150

s�m


y��m 8 14 14 8

DSLSSL DSLSSR

LSSL LSSRIR

TLIR TRIR

βx, max 142βy, max 138


e Interaction Region

z [m]

x [m]

0 5 10 15 20 25 30-5-10-15-20-25-30

0

-0.1

-0.2

-0.3

0.3

0.2

0.1

Electron separatordipole

Electron finalfocusing quads

Proton finalfocusing halfquadrupole

SR Absorber

Proton beam

Electron beam

proton beam

electron beam

1 Degree

separator dipole

electron doubletproton half

quadrupole 10 Degree

synradabsorber

2×6.2 m

proton beam

electron beam

z [m]

x [m]

0 5 10 15 20 25 30-5-10-15-20-25-30

0

-0.1

-0.2

-0.3

0.3

0.2

0.1




SR Absorber

Proton beam

Electron beam

electron triplet

proton half quadrupole

synradabsorber

2×1.2 mseparator

dipole


e Parameters

High Luminosity (10 Degree)High Acceptance (1 Degree)

Electrons Protonsβx 0.4 m 4.05 mβy 0.2 m 0.97 ml* 6 m 22.96 mσx 45 µm45 µmσy 22 µm22 µmCrossing angle 1 mrad1 mradLuminosity 8.54 1032 cm-2 s-18.54 1032 cm-2 s-1

Luminosity loss factor 86%86%Luminosity 7.33 1032 cm-2 s-17.33 1032 cm-2 s-1

Pγ 51 kW51 kWEc 163 keV163 keV

Reminder:Beamsize: Beta-function (drift space)

Electrons Protonsβx 0.18 m 1.8 mβy 0.1 m 0.5 ml* 1.2 m 22.96 mσx 30 µm30 µmσy 15.8 µm15.8 µmCrossing angle 1 mrad1 mradLuminosity 1.8 1033 cm-2 s-11.8 1033 cm-2 s-1

Luminosity loss factor 75%75%Luminosity 1.34 1033 cm-2 s-11.34 1033 cm-2 s-1

Pγ 33 kW33 kWEc 126 keV126 keV

! =

!

"# !(s) = !! +l!

2

!!


e IR Optics - Electrons1 Degree

0 200 400 600 800

0

200

400

600

s�m


y��m


e

0 200 400 600 800

�50

0

50

100

150

200

250

300

s�m


y��m

IR Optics - Electrons10 Degree


e e-A Collisions

• Assume present nominal Pb beam in LHC:same beam size as protons, fewer bunches (592 bunches, Nb=7×107 208Pb82+ nuclei)

• Assume e-injector chain can provide the desired bunch pattern (592 bunches of Nb=6×1010 e-)

Lepton-nucleus and lepton-nucleon luminosity at 60 GeV and 45 MW synchrotron radiation losses

L=5×1029 cm-2s-1 ⇔ Len=1×1031 cm-2s-1


e Main Ring NC Magnet DesignDipole

Challenge:• Field reproducibility at injection (10 GeV)• Constant field quality during the ramp• Compactness• Compatibility with synchrotron radiation

power

35 cm

Beam Energy 10-60 GeVNumber of magnets 3080

Magnetic length 5.35 mMagnetic field 127 -763 Gauss

Vertical aperture 40 mmPole width 150 mm

Conductor material copper/aluminiumTotal power

consumption of all dipoles at 60 GeV

0.8 MW

Coolingair or water

(depending on tunnel ventilation)

Field reproducibility <0.1 GaussModels by BINP (silicon steel iron lamination)and CERN (interleaved iron plastic

laminations plastic: iron=2:1) achieving required field reproducibility.


e

30 cm

QuadrupoleChallenge: Compactness

Number of magnets 368 (QF) + 368 (QD)Magnetic length 1.0 m

Magnetic field 8.4 (QD)10.28 T/m (QF)

Radial aperture 30 mmWeight 700 kg

Conductor material copperTotal power (60 GeV) 2.5 kW

Cooling water

Arc quadrupole: Insertion/bypass quadrupoles:

Number of magnets 148 (QF) + 148 (QD) Magnetic length 1.0 m (QF) / 0.7 m (QD)Magnetic field approx. 18 T/mRadial aperture 30 mm

Weight 700 kg (QF) / 500 kg (QD)Conductor material copper

Total power (60 GeV) 6.0 kW (QF) / 4.5 kW (QD)Cooling water

35 cm

Main Ring NC Magnet Design


e Proton SC IR Magnets

z [m]

x [m]

0 5 10 15 20 25 30-5-10-15-20-25-30

0

-0.1

-0.2

-0.3

0.3

0.2

0.1




SR Absorber

Proton beam

Electron beam

separator dipole

proton half quadrupole

synradabsorber

Separation Scheme:

proton beam

electron beam

Magnet Design:• similar to LHC MQXA magnets, no real challenges in respect of gradient• Challenge:

- field free region for electron- allow for a minimal distance between electron and proton beam


eProton SC magnet design

Q1: Half Quadrupole with field free regions for the e-beam

0 20 40 100 120 160 180 20080 14060 180160

Q2: Single aperture

Proton SC IR Magnets

Q1 Q2Radial aperture 35 mm 36 mmB0 137 T/m 137 T/mg0 2.5 T -Beam separation 65 mm 107 mmoperation percentage on the load line of the sc 77% 73%

Bfringe e-aperture 0.03 T 0.016 Tgfringe e-aperture 0.8 T/m 0.5 T/m


e Main Ring RFSPL type cavities:• 120 cavities• 721.4 MHz• in total 500 MV• 9.8 MV/m (conservative

assumpt., SPL assumes 25 MV/m)

• 8 double cell cavities in 12 m cryomodules, 15 cryomodules total ->180 m + space for quads etc.

• feed two cavities with one 1 MW klystron

RH2 3

RH 87

UJ 4 6

UA4 7

UJ 4 7RA4 7

UW 4 5

US 4 5UL4 6

TX4 6

UJ 4 4UX4 5

RA4 3

UA4 3UL4 4

UJ 4 3 RR 53

UJ 5 3

UXC5 5

UL 54

US C5 5

P M5 4P X5 6

RZ5 4UP 5 3

UJ 5 6 1

UJ 5 7RR 57

UJ 5 6

P M5 6

UL5 6TU5 6

UD 62

UJ 62

UJ 63

P M6 5

UJ 6 4UA6 3

RA6 3

TD 62UP 62

UL6 4

P Z6 5

P X6 4

UJ 6 6

UJ 6 7

UJ 6 8

UX6 5

UA6 7

RA6 7

TD6 8

UD6 8

UP 68

UL6 6

TX6 4

UW 6 5 US 6 5

Point 7

RR7 3

RR7 7

UJ 7 6

P M7 6

TZ7 6

RA8 3

UA 83

UJ 83

UJ 8 4

UJ 8 2

Point 8 PM 85

P X8 4

P Z8 5

UX 85TX8 4

UL 84

UA8 7

RA 87UJ 86

UJ 8 7

UW 8 5

US 85

UL 86TI 8 UJ 88

PGC 8

TJ 8

RR1 3

UJ 1 3

RT1 2

UJ 1 4

US 1 5

TI 1 2

P M1 5

P X1 4

UX1 5

UL1 4

UJ 12

RE 12 RE 88

LS S 4P o in t 1 .8

PMI 2

UJ 1 7

UJ 1 8

UJ 1 6TI 1 8

RR1 7

PM 18 P X1 6 P X1 5

US A1 5

UL1 6

UJ 2 2

UJ 23UJ 2 4

UA2 3

RA2 3

TI 2

P GC2RA2 7

UJ 2 6

P X2 4

UX2 5

P M2 5

UW 2 5US 2 5

UL 26

UL 24


Point 4

P Z 3 3

P M3 2

UJ 3 2 UJ 3 3

RZ3 3

TZ3 2

Point 5

Point 6

Point 1

S P S

P X4 6P Z4 5

P M4 5

RT 18

P o in t 3 .3

P o in t 3 .2

UP 2 5

TT 40

LEPLHC

RE 32

RE 28

RE 38

RE 42

RE 48RE 52

RE 58RE 62

RE 68

RE 72

RE 78

RE 82

RE 22

RE 18

N

ATLAS

CMS

LHeCe-injecto

r

RF

RF

e

p

9 cryomodules = 108 m36 klystrons

2×3 cryomodules = 2×36 m2×12 klystrons


e Cryogenics

!"#!$%&

'()*+,&-.&/)0-%-123!4&

'()*+,&-.&/)0-%-123!4&

/)0-53$+(&

6786'&&1!(!/(-)&/$9!)+&

:)0-&53$+(&8;:&#!$%&

Bypasses:Cryogenic requirements:• SPL type cryomodules• three cryoplants (like LHC/

LEP2)• 2 K operationTotal electrical power: • approx. 5 MW

0.6 GeVfrom EPA


3.73 GeV

10 GeV to LHeC

~20 m

6.87 GeV

Injector:Cryogenic requirements:• 12 ILC (XFEL) type

cryomodules• one cryoplant of modest size• 2 K operation


e SummaryChallenges:• Integration (bypasses around the remaining p-

experiments + e-ring integration into existing LHC tunnel)

• Main arc dipole magnet design (low field and high field quality dipole magnet)

• Interaction region (beam separation)• Final focus proton magnets (quadrupoles with field

free regions for the electron beam)


e SummaryChallenges:• Integration (bypasses around the remaining p-

experiments + e-ring integration into existing LHC tunnel)

• Main arc dipole magnet design (low field and high field quality dipole magnet)

• Interaction region (beam separation)• Final focus proton magnets (quadrupoles with field

free regions for the electron beam)

High luminosity ep/A-collisions reachable with proven technology

THANK YOU FOR YOUR ATTENTION

e


e Basic Refrigerator Layout

!"#$%&'(#)&*(+&

!"#$%&'()*#

,""-.&'(#)&*(+&

/(0-.&'(#)&*(+-1&&23(#)&'(4".-11(.15&

67.4&'(4".-11(.1&

%"+*&,&-%"+#

8$1%.$*9:(;&*(+&

!9""#<&%(&1%.$;=&(>&'.<(4()9#-1&

?$;1"$.7:(;@&>.(4&/ABC&7;)&/D3&'.<(=-;$'1&2!-.=-E&F-.7.)E&,)(5&

D-&!%(.7=-&

B.()9':(;&(>&7##&&%-4"-.7%9.-&#-G-#1&>.(4&HII&J&%(&CI&J&

B.()9':(;&(>&C&J&2K7;)-4&'(#)&*(+-1L&M.&M;-&#7.=-&N2O5&P6&Q&C&J&&


e Polarization

• Polarization of 25% to 40% at 60 GeV can be reasonably aimed for with harmonic closed orbit spin matching

• precision alignment of the magnets to better of 150 µm rms needed to achieve a high polarization level

• option of having siberian snakes


e Synchrotron Radiation IR1 Degree

Power [kW]

critical energy [keV]

DL 13.9 118QL2 6.2 318QL1 5.4 294QR1 5.4 293QR2 6.3 318DR 13.9 118Total/Avg 51.1 163

e-


e Synchrotron Radiation IR10 Degree

Power [kW]

critical energy [keV]

DL 6.4 71QL3 5.3 308QL2 4.3 218QL1 0.6 95QR1 0.6 95QR2 4.4 220QR3 5.2 310DR 6.4 71Total/Avg 33.2 126

e-


e Main Ring Lattice ParametersBeam Energy 60 GeVNumb. of Part. per Bunch 2.0! 1010

Numb. of Bunches 2808Circumference 26658.8832 mSyn. Rad. Loss per Turn 437.2 MeVPower 43.72 MWDamping Partition Jx/Jy/Je 1.5/1/1.5Damping Time !x 0.016 sDamping Time !y 0.025 sDamping Time !e 0.016 sPolarization Time 61.71 minCoupling Constant " 0.5Horizontal Emittance (no coupling) 5.53 nmHorizontal Emittance (" = 0.5) 4.15 nmVertical Emittance (" = 0.5) 2.07 nmRF Voltage VRF 500 MVRF frequency fRF 721 MHzBunch Length 6.88 mmMax. Hor. Beta 141.94 mMax. Ver. Beta 138.43 m

123<Qx<2483<Qy<84

122.2 122.4 122.6 122.8 123.0

83.2

83.4

83.6

83.8

84.0

1 Deg10 Deg

possible working point

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