Presentazione di PowerPoint - PowerPoint PPT Presentation

About This Presentation
Title:

Presentazione di PowerPoint

Description:

CERN restrict meeting, November 26th 2013 Luca Stanco for the NESSiE Collaboration All these groups have long experience in Neutrino Physics and Hardware – PowerPoint PPT presentation

Number of Views:58
Avg rating:3.0/5.0
Slides: 33
Provided by: LucaS168
Category:

less

Transcript and Presenter's Notes

Title: Presentazione di PowerPoint


1
CERN restrict meeting, November 26th 2013 Luca
Stanco for the NESSiE Collaboration
All these groups have long experience in Neutrino
Physics and Hardware (Chorus, Macro, Nomad,
Opera, T2K )
2
On the quest for the BLACK SWANs
if you did not see ever any black swan, does it
mean that they do not exist ?
Taleb Nassim, The Black Swan,
2007 Ex-statistician, now a very rich person, by
applying his theory of Risk Analysis to Financial
World
3
In Neutrino Physics we may face a more complicate
version
in case they exist, is there more than one
species ?
  • And our community own several opinions
  • Only one type of Black Swan exist
  • Looking for more is equivalent to suspect that
    Flying Donkeysexist even if nobody never saw
  • How to look for them ?

with this ?
or like that ?
4
In any case, everybody knows that Risk-Analysis
is a touchy and subtle operation.
Pay attention to avoid this situation
or
Looking in the wrong direction
Looking all in the same direction
5
Some facts
  1. Leptonic Flavor investigation should be a MUST
    for the HEP future
  2. CPV is in our hands given the large value of
    q13
  3. It may be a long shot, and it might be difficult
    to have more than ONE Big Project
  4. Contemporary RD and even other Physics programs
    are mandatory
  5. An SBL program may be a good possibility, with
    measurements of - ne/nm appearance/disappearance
    and neutrino cross-sections
  6. Under Gran Sasso there are equipments 10 M
    valued to be perfectly usable, with a relative
    modest investment, for Spectrometers
  • Spectrometers at a neutrino beam. Extended
    studies
  • SPSC-P-343, arXiv1111.2242
  • SPSC-P347, arXiv1203.3431
  • ESPP, arXiv1208.0862
  • LOI CENF https//edms.cern.ch/nav/PCERN-00000967
    25V0/PCERN-0000096728V0/TAB3
  • L. Stanco et al., AHEP 2013 (2013) ID 948626,
    arXiv1306.3455v2

Note increasing consensus in the Community that
Spectrometer(s) are needed either for
SBL or LBL
6
NESSiE Initial Design
  • Two Iron spectrometers (ICM), 1500 800
    t, composed by
  • 48 yoke blocks, , 4.5 x 0.6 x 1 m, 25t
  • 480 slabs, 2 3 t, 1.25m x 3.56 m
  • 1800 700 m2 of RPC
  • sandwich style assembly to be made in situ,
    one piece per time
  • 20,00012,000 digital channels
  • Two ACM preassembled andinstalled in one shot
  • Precision Trackers preassembled and installed in
    one shot
  • Near Nessie movable aside on air-pad
  • 1 0.5 MW , 10 kA, power(summed up for ACM and
    ICM)

ICM
ACM
Optimized ! Reduced by about a factor of 2 !!!
7
Another fact
Following the outcome of the European Strategy
Group, CERN committed us to start an RD program
for Neutrino Physics, in sinergy with LBL (USA or
Japan), while waiting for a granted SBL beam
Excerpt from ESPP CERN strategy, final document
approved on May 7 2013,
Endorsed by CERN Council at the end of June.
High-priority large-scale scientific activities
(c-d-e-f)
8
(from recent P5 DG presentation)
CENF/CERN
WA104 (NESSiE)
NeDe/LBNE
SBL/FNAL
9
Which scenarios ?
  • Use OPERA Spectrometers to explore 1-2 orders of
    magnitude innm disappearance(Need CENF-like nm
    beam, or new tunnels/caverns in NuMI)
  • Use NESSiE-original (ICMACM) plus a target (LAr
    or Scintillators)to also measure NC, and
    cross-sections(Need CENF-like nm beam for
    PhysicsEnough FNAL Booster just for
    cross-sections)
  • Use large-ACM superconducting in LAr (5x3x2) to
    couple ACM and target.ICM also present, for
    Physics. How much RD ?(Need Charged Beams, nm
    beams for Physics as in (2))
  • Use LAr tank of order 100 ton, with magnetized
    SC-ACM, and/or ACM-saPrototype useful for one of
    the LNBE-Nears(Need Charged Beams, need
    CENF-like nm beam and T600 for Physics)

10
SBL nm disappearance search()
Scenario (1)
  • - Focus the physics goal to gain an order of
    magnitude in nm disappearance limit at eV
    scale for Dm2
  • Set the issue of using only iron magnets, with
    a small scintillator target to measure NC
  • Define a way to extract oscillation by using a
    new variable

() LS et al. AHEP 2013 (2013) ID 948626,
arXiv1306.3455v2.
10
11
SPECTROMETERS ONLY
nm beam
Double ratio (F/N)data / (F/N)no-osci
anti-nm beam
Non oscillation hypothesis is tested with a c2
test to a flat ( 1) distribution
New variable log10(1/E)
11
12
What is this ?
http//arxiv.org/pdf/1311.4750.pdf
T2K, end 2012, ND, data vs Simulation,
http//arxiv.org/pdf/1211.0469.pdf
13
Re-arrangement using OPERA Spectrs
NESSiE Footprints NEAR Site FAR Site
Height (along y) 5.47 m 6.65 m
Length (along z) 10.06 m 10.06 m
Transverse (along x) 9.75 m 13.5 m
14
Conductor Al Coil Cross Section 72x72 mm2 Hole
(cooling) 30 mm Ø B0.12T
NESSiE ACM NEAR Site FAR Site
Nb of coils 39 51
Conductor Length/coil 14,8 m 22,3 m
Power 230 kW 450 kW
Compare e.g. with ISS-Detectors,
http//arxiv.org/pdf/0712.4129v1.pdf
14
15
Sensitivities for the present NESSiE
configuration (full simulation, with neutrino
beam)
Charge ID
Best, ever, sensitivity for m detection with
similar apparata over large area (and few MCHF
cost)
(goal 250 MeV)
Momentum
Momentum measured by range (ICM) up to 3.5 GeV,
then ACM and ICM provide 30
(goal 250 MeV)
16
However recent developments on SuperConducting
cables or even the use of SC coils à la ATLAS
allow us to think to a different approach in
magnetization. RD on magnetization of LAr
tank Pros - best detector for both muons and
electrons - similar Near and Far detector
sites for the LBNE project - couple ACM
with target Cons - structural forces (depending
of the magnetic field) - insulation
structures - cost ? - long way
?
17
RD planning
1) Prototype ACM-warm (conditionally funded by
INFN) 2) Tracking Detectors in Magnetic Field RD
3) Evaluation ACM-cold 4) Collaboration with LAr
activities/groups
18
CONCLUSION/VISION
  • Neutrino Physics is a MUST for Particle Physics
  • (neutrino mass, Majorana/Fermi,
    astroparticle connection, window for BSM)
  • CERN/Europe should be a MAJOR actor
  • (facilities, past experience, major partner
    in the Global picture)
  • Large and experienced community
  • (knowledge, motivation, largeness)
  • A Global Coherent Strategy is MANDATORY
  • (increasing bigness of the experiments)
  • Prioritization or Compromise ?
  • (multi-year projects, limited resources)

In our case bad luck will correspond to bad
planning
19
Thank you !
20
Backup slides
21
Fringe Magnetic Field upstream the ACM No
shielding
B (Gauss)
22 Gauss
z (beam axis, m)
LAr ACM (z - 3.5 m)
10
22
Fringe Magnetic Field upstream the ACM With
shielding
0.7 Gauss
B (Gauss)
z (beam axis, m)
LAr ACM (z - 3.5 m)
11
23
Shielding 2 iron slabs (5 cm thick) 1
Vacoflux-50 slab (1 cm thick) Vacoflux
Colbalt-Iron Alloy with maximum saturation at
2.35 T
y
z
12
24
New configuration (to be optimized) Iron Core
Magnet gt 1 higher iron slab (50 cm thick)
y
z
y (m)
13
25
New configuration (to be optimized) Iron Core
Magnet gt 1 higher iron slab (50 cm thick)
z (beam axis, m)
LAr ACM (z - 3.5 m)
14
26
Power/Spending review
In the first design the power consuption
was PNEAR 600 kW PFAR 1630 kW The
design was optimized in order to reduce the
power consuption but keeping the required muon
charge ID Full cross section 72 x 72
mm2 Cooling hole f 30 mm gt Conductor
cross-section S 4477 mm2 Coil length L
17.2 m Coil number N 39 rAl 0.027 W mm2
/ m I 8100 A gt B 0.12 T PNEAR N
I2 rAl L /S 270 kW ( PFAR 760 kW )
16
27
OPERA re-use (under pressure of SPSC and INFN)
  • 2 Spectrometers available, with Detectors and
    Servicing
  • Possibility to full re-use for Far AND Near ICM
  • Need two new sets of Yokes (Top Bottom)
    new Electronics for RPC
    Mechanical Tools PT detectors
  • Scintillators
  • Other ACMs

Under discussion in OPERA possible start
dismantling begin 2015
28
MONEY estimation and Opera endowment
(dismantling in 2015)
Iron magnets in-kind value 5940 K (from OPERA
MoU) Cost for transportation to CERN and
refurbishing 3000 K In-kind value of Precision
Tracker 1900 K possible
refurbishing 700 K In-kind value of
Scintillators 1900 K possible
refurbishing 300 K Cost ACM 1000 (Near) 1200
(Far) TOTAL 3111 6 M
ACM-NEAR, including RD, designs, certifications
ACM-FAR might be staged at 2nd phase (after LS2)
28
29
Top view
Side view
30
FNAL options under investigation
Booster Beam (at 700 m) (realistic simulation
with fluxes, cross-sections, GEANI 2.6)
31
Muon momentum distributionPositive polarity
(compare all)
  • The spectrum at FNAL is softer than CERN but the
    rate including the numi off-axis are comparable.
  • In positive polarity the anti-nu from from
    defocused mesons are small
  • The various component test different L/E

32
New Beam for LBNE (at 700 m) (fluxes comparison,
to be evaluated for the LBL-Near Detector)
Write a Comment
User Comments (0)
About PowerShow.com