SPL Fréjus

31
SPLFréju s J-E Campagne Linear Accelerator Laboratory – Orsay – France Thanks: A. Cazes, M. Mezzetto, Th. Schwetz and the GLoBES team and AM Lombardi, R. Garoby

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SPL  Fréjus. J-E Campagne Linear Accelerator Laboratory – Orsay – France Thanks: A. Cazes, M. Mezzetto, Th. Schwetz and the GLoBES team and AM Lombardi, R. Garoby. CERN SPL. LSM-Fréjus. Near detector. 130km. TRE. A possible schema. Related talks. - PowerPoint PPT Presentation

Transcript of SPL Fréjus

Page 1: SPL  Fréjus

SPLFréjus

J-E CampagneLinear Accelerator Laboratory – Orsay – France

Thanks: A. Cazes, M. Mezzetto, Th. Schwetz and the GLoBES team and AM Lombardi, R. Garoby

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NuFact 05 J.E Campagne 2

A possible schema

+ BetaBeam: see M. Mezzetto+ ATM see Th. Schwetz

Machines R. Garoby & M. Lindroos

TRE

CERN SPLLSM-Fréjus

Near detector

130km

Related talks

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NuFact 05 J.E Campagne 3

SPL block diagram (CDR 1)Characteristics (Conceptual Design Report 1):

are “optimized” for a neutrino factoryassume the use of LEP cavities & klystrons up to the highest energy

2.2GeV

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Gradients at 700 MHz

Last test performed in CryHoLab (July 04):5-cells 700 MHz ß=0.65 Nb cavity A5-01from CEA/Saclay and IPN-Orsay

from Stephane Chel, HIPPI04, Frankfurt, sep04

LEP cavities may have worked 350MHz & 3.6MV/m effective gradientNuFact Note 040

1E+08

1E+09

1E+10

1E+11

0 2 4 6 8 10 12 14 16 18 20

Eacc ( MV/m )

Q0

Vertical Cryostat (Fast Cooling)

Horizontal Test in CryHoLab (B1)

quench

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NuFact 05 J.E Campagne 5

New optimization questioned @ MMW04*Particle production

Horn design optimisation

Decay tunnel parameter optimisation

Flux computation at Fréjus

and CP sensitivity. LAL – 04-102 submitted to EPJC

p

*: Multi MegaWatt Workshop at CERN 26-28 May 04

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Particle production

Proton beam :1. Pencil like2. Ek=2.2GeV, 3.5GeV…

Target : 1. 30cm long cylinder, 15mm in Liq. Hg2. FLUKA 2002.4

Normalized to a power of 4MW:1.14 1023 pot/yr @ 2.2GeV0.71 1023 pot/yr @ 3.5GeV

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SuperBeam vs Fact Optics

px/pz

x

20 mrad

2 m

Super Beam

Spot size @ 130kmDecay tunnel size

px/pz

x

½ rad

30cm

Fact

Decay channel solenoidsAperture and B strength

Thanks S. Gilardoni

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Pion productionp (2.2GeV)

Hg

Fact SB

at the exit of the target

Horn optimisation by S. Gilardoni

This new optimisation

2 105 pot

Rule of thumb: E/3~ E(GeV)2.L(km)

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NuFact 05 J.E Campagne 9

Kaon production?

at 2.2GeV : 0.26 +/s 0.8 10-3 K+/s

see BENE meeting 11/09/03

at 3.5GeV : 0.29 +/s 2.8 10-3 K+/s

at 4.5GeV : 0.32 +/s 5.2 10-3 K+/s

Ep(GeV) Ep(GeV)

+

-

K+

K-

K0Not physical dip !!!Not Used…

3.52.2Fo

r 5

00

00

0 p

ot

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NuFact 05 J.E Campagne 10

Horn design parameter

140 cm 220 cm

80 cm

HORNHORN

inner radius

3.4cm

neck length

40cm

outer radius

20.5cm

total length

140cm

REFLECTOR

outer radius

40cm

total length

220cm

E~300MeVE~800MeV

Conductor thickness : 3mmhorn : 300kAmps

reflector : 600kAmpsChallenging!!!

Using Geant 3.2.1NuFact-Note 138

Drawing from the horn built at CERNOptimized for Super Beam

+ or - focusing

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Decay Tunnel Parameters

LengthLength1. modify purity2. L=10m, 20m, 40m

and 60m have been tested.

3. 10m40m , + 50% to 70%

e , e + 50% to 100%

4. 40m60m , + 5%

e , e + 20%

40m seems better40m seems better

RadiusRadius1. modify acceptance2. R=1m, 1.5m and

2m have been Tested

3. 1m 2m (L=40) , +50%

e , e +50% to 70%

Larger is better (2m)…Larger is better (2m)…This results have been checked on sensitivity to 13 and CP

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Fluxes comparison @ 130km

<E> ~ 275 MeV, 4.5 1013/100m2/yrOld Fact optimum

<E> ~ 300 MeV, 1.2 1014/100m2/yr

3.5GeV SPL optimum

<E> ~ 245 MeV, 7.5 1013/100m2/yr2.2GeV SPL optimum

~95 CC/kT/yr*

*: Lipari x-sect. (see later)

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Flux @ 130km: + focusing

x1/140

x1/17

x1/3000

+

-

+

~1/2 -~1/2 K0

e3

http://opera.web.lal.in2p3.fr/horn/Simu/index.htm

3.5GeV Kinetic p beam~800MeVfocusing40m decay tunnel length2m decay tunnel radius

e

e

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The X-sections

B is an ideal tool to measure these cross-sections and a 2% systematic error on both signal and background are used.

---: Lipari et al. on H20

SPL

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Analysis: GLoBES + M. Mezzetto’s parameterization file

e (Sig)

13 = 1° 13 = 3° sin2213= 0.05

33 (/2)

330(/2)

2200 (/2)

3670 ()

e (Bkg)

1500

e e CC 0 from NC

CC

( missId)

e e CC

Frac. of Bkg 90% 6% 3% 1%

Reduction Factor

0.707(1060)

6.5 10-

4(90)5.4 10-4(45) 0.677(15)

(Sig)64950

(/2)64414 ()

(Bkg) 3 (4.310-5 CC)

440kT x 5yrs: 2,2 Mt.yrs (+)

sin2212=0.82, 23=/4, m221=8.1 10-5eV2, m2

31=2.2 10-

3eV2Reduction factor and efficiencies taken from SK simulation (D. Casper) and a

tight cut for e/ misId. (cf. hep-ph/0105297)

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e (Sig)

13 = 1°

sin2213= 0.001

13 = 3°

sin2213= 0.01

sin2213= 0.05

110(/2)

390(/2)

1300(/2)

1140()

e (Bkg)

490

e e CC e e CC 0 from NC CC

( missId)

Frac. of Bkg 45% 35% 18% 2%

Reduction Factor

0.677(220) 0.707(170) 2.5 10-3(90) 5.4 10-4(10)

(Sig)

/2)19590 ()

(Bkg) 1 (4.310-5 CC)

440kT x 8yrs: 3,5 Mt.yrs (-)

sin2212=0.82, 23=/4, m221=8.1 10-5eV2, m2

31=2.2 10-

3eV2

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Some physics performances440kT water Č, 4MW SPL, opti. Fluxes

2% syst. on signal & bkg

(2(2dof)=4.6 or 11.83)*: 5 bins [0.08,1.08] GeV

Sin2213(90%CL) = 610-3 (0.7°)

5yrs (+)CP=0

preliminary

90%CL

New Opt.Old Opt.

True values: (m23, sin2213)

sin2212=0.82, 23=/4, m221=8.1 10-

5eV2

5% external precision on 12 and m221

and use SPL disappearance channel and spectrum

analysis*

sizeable improvement

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Some physics performancesTrue values: CP=0, 13=0, sin2212=0.82, 23=/4, m2

21=8.1 10-5, m231=2.2

10-3

5% external precision on 12 and m221 and use SPL disappearance

channel

2% syst. on signal & bkg Improve T2K-I

2yrs ()8yrs ()

preliminary

T2K-I

Rate onlySpectrum analysis (prelim.)

90%CL (2(2dof)=4.6)

5yrs ()

Old SPL

x10

2yrs ()8yrs ()

preliminary

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Some physics performances

Use glbChiDelta and 2 (1dof)=9

True values (CP,

Tests CP=0 and CP=

sin2212=0.82, 23=/4,

m221=8.1 10-5, m2

31=2.2 10-3

5% external precision on 12 and m2

21

use SPL disappearance channel2% syst on signal & bkg

CP discovery @ 3

2yrs (+)8yrs (-)

preliminary

Old Opti.

New Opti.

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Evolution of the performances

True values: CP/ =-0.85, sin2213=0.03, sin223=0.4,

5% external precison on m221=8.1 10-5, m2

31=2.2 10-3, 23

2yrs , 8 yrs

0.02 0.04 0.06

sin2213

-1

-0.5

0

0.5

“Fact opt.”

0.02 0.04 0.06

sin2213

-1

-0.5

0

0.5

“ 3.5 GeV opt.”

trueWrong 23

Wrong hierarchy

Wrong hierarchy and

23

90%CL

Solid: SPL+ATMDashed: SPL only

NNN05 New Prelim.

cf. Th. Schwetz

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NuFact 05 J.E Campagne 21

CDR2 block diagrams

H-

RFQ RFQ1 chop. RFQ2DTL-CCDTL-SCL 0.65 0.8 1

dump

Source Front End Normal Conducting Superconducting

95 keV 3 MeV 180 MeV 3.5 GeV

40MeV 90MeV

10 m 83 m ~ 350 m

Stretching andcollimation line

3.5 GeV to PS &Accumulator Ring(Neutrino Facility)

Debunching

400 MeV

chopp.

LINAC 4

352 MHz 704 MHz

900 MeV

1

1 - 2 GeV toEURISOL

SPL CDR2 Preliminary Layout 15.3.2005Work in progress!

1-2GeVEurisol, B

2-3.5GeVSuperB,

NuFact

CERN proton complex

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NuFact 05 J.E Campagne 22

3 MeV test place ready

Linac4 approval

SPL approval

RF tests in SM 18 of prototype structures*

for Linac4

CDR 2

Global planning (R.G courtesy)

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NuFact 05 J.E Campagne 23

Summary

Higher proton energy & SB Horn specific1. new baseline: 3.5GeV/2m/40m

13 sensitivity:1. sensitivity to 13 = 0.7° (5yrs +): gain +25% wrt old result 2. down to 13 = 1.4° with the 10yrs mixed scenario

independently of CP 3. Improve T2K-I by a factor 10 at CP = 0 (5yrs +)

Can discover CP violationCan solve ambiguities alone and result is improved

thanks to ATM(Th. Schwetz ‘s talk)

Complementary to BetaBeam to cross check the background and improve CP sensitivity (M. Mezzetto’s talk)

Thank you

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END

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NuFact 05 J.E Campagne 25

13 and CP Sensitivity computation

Use GLoBES v2.0.11 and M. Mezzetto SPL.glb file detector:

1. Water Cerenkov2. 440 kt3. at Fréjus (130 km from CERN)

Run:1. 5 years +

2. 1 year + + 4 years - 3. 2 years + + 8 years -

Computed with CP=0 (standard benchmark) and = 0

other parameters…. m23 = 2.5 10-3eV2

2. m12 = 7.1 10-5eV2

Same duration Same statistics

sin2223 = 1.0sin2212 = 0.82

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NuFact 05 J.E Campagne 26

3.5GeV Kinetic p beam~800MeVfocusing40m decay tunnel length2m decay tunnel radius

x1/200

x1/1

0

x1/1

300

+

-

1/3 +1/3 K0

e3

1/3 K+e3

-

Flux @ 130km: - focusing

e

e

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5 years positive focusing

Best sin2213 > 7.1 10-4 Ek = 4.5GeVE=300MeV

tunnel : 40m long2m radius

Energy comparison Focusing comparison

CP = 0

10-3 sin221

3

m2

23

(eV

2)

10-3

E~260MeV

CP = 010-3 sin221

3

10-3

m2

23

(eV

2)

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NuFact 05 J.E Campagne 28

positive focusing vs 10 years mixed scenario.

10-310-4 10-310-4 10-310-410-310-4

5y+

5y+

2y+8y-

2y+8y-

Energy comparison Focusing comparison

2.2GeV 3.5GeV 4.5GeV 8GeV

-100

-50

0

50

-150

-100

-50

0

-150

300MeV 4.5GeV 300MeV 3.5GeV 260MeV 3.5GeV

Best sin2213 > 2.02 10-3 Ek = 3.5GeVE=300MeV

tunnel : 40m long2m radius 90%CL

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General comparison.

for 10 years in mixed focusing, sensitivity around 13~1°

Clear complementarily between positive scenario and beam (CP>0)

5y mixed focusing10y mixed focusing5y positive focusing

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Neutrino Flux 100km away

Ekine (GeV) Ekine (GeV)

evts

/10

0m

2/y

Ekine (GeV) Ekine (GeV)

from and

from K0

from K

Ek=3.5GeVE ~300MeVL = 40m,R=2m

+ focusing

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NuFact 05 J.E Campagne 31

MARS vs FLUKA

At the entrance of the SB decay tunnel (after the horn focusing)

Discrepancies reduced in the beam line R = 1mNo angular cut

A. Cazes thesis