SPLFréjus
J-E CampagneLinear Accelerator Laboratory – Orsay – France
Thanks: A. Cazes, M. Mezzetto, Th. Schwetz and the GLoBES team and AM Lombardi, R. Garoby
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
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
NuFact 05 J.E Campagne 4
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
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
NuFact 05 J.E Campagne 6
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
NuFact 05 J.E Campagne 7
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
NuFact 05 J.E Campagne 8
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)
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
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
NuFact 05 J.E Campagne 11
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
NuFact 05 J.E Campagne 12
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)
NuFact 05 J.E Campagne 13
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
NuFact 05 J.E Campagne 14
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
NuFact 05 J.E Campagne 15
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)
NuFact 05 J.E Campagne 16
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
NuFact 05 J.E Campagne 17
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
NuFact 05 J.E Campagne 18
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
NuFact 05 J.E Campagne 19
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.
NuFact 05 J.E Campagne 20
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
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
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)
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
END
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
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
NuFact 05 J.E Campagne 27
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)
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
NuFact 05 J.E Campagne 29
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
NuFact 05 J.E Campagne 30
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
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