The CERN NEUTRINO FACILITY
Marzio Nessi & Rende Steerenberg
On behalf of the CENF study/project team
IEFC, 22 February 2013
Contents
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Why a new CERN Neutrino Facility and how ?
The Four Main Facility Components
Project status, organisation, planning and cost
Summary
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
2
•
•
•
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Why a new CERN Neutrino Facility and how ?
The Four Main Facility Components
Project status, organisation, planning and cost
Summary
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
3
Why a new CERN Neutrino Facility?
• Interesting experimental proposal by ICARUS-NESSiE
(SPSC-P-347) for the search to sterile neutrinos.
• Demonstrate new generation of neutrino detectors of
double phase LAr TPC proto-type by the LAGUNALBNO consortium.
• New opportunity for the experimental European
neutrino community to reorganize itself.
• Extract of European strategy document: “CERN should
develop a neutrino program to pave the way for a
substantial European role in future long-baseline
experiments.”
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Main Physics Requirements
• Near and far detectors locations, positioned at
the correct L/E.
• Central νμ energy of ~ 2 GeV.
• About 4.5x1019 protons on target per year for
at least 3 years.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Protons on Target forecast
• Weekly/daily time sharing between NA and CENF required.
– Fast extraction and slow extraction from LSS2 will not be possible in
the same super cycle.
– No realistic concept has been identified to date to solve this problem.
More and extensive studies will need to be made, for example on
whether a non-local slow extraction with ZS in LSS6 could work.
Intensity Comparison as Func on of NF-FT Time Sharing Ra o
2011 / 2012
(CNGS)
5E+19
4E+19
Intensity
• 200 physics days to be
shared between NA
and CENF.
• With 60% time share
for CENF and ~ 70 days
dedicated running
4.5x1019 pot/yr can be
in reach.
6E+19
2011 / 2012
(Fixed target)
3E+19
NF dedicated integrated Intensity
FT dedicated Integrated Intensity
2E+19
FT combined integrated intensity
NF combined integrated intensity
1E+19
0
0
10
20
30
40
50
60
70
80
90
100
NF me share [%]
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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•
•
•
•
Why a new CERN Neutrino Facility and how ?
The Four Main Facility Components
Project status, organisation, planning and cost
Summary
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
7
The Four Main Facility Components
Primary beam
Near Detector Facility
~600m from target area
@456m from target,
EHN1 extension
Secondary beam
In front of EHN1
Primary beam
line
Target
facility
Near
detectors
facility
Far Detector Facility
@1600m from target
Far
detectors
facility
EHN1
460 m
450 m
440 m
TT20
0
M. Nessi - R. Steerenberg
500 m
MORAINE
MOLASSE
Neutrino beam
Slope 1.5804 %
1000 m
IEFC - 22 February 2013
1500 m
2000 m
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Primary Beam: Production & Extraction
Neutrino
beam
North
Area beam
Magnetic septa
(MST+MSE)
•
•
•
•
Inj. kicker
(MKP)
Beam production scheme and beam
structure similar to CNGS.
Successfully tested non-local fast
extraction concept from LSS1 & LSS2.
Incompatible with simultaneous slow
extraction  Time sharing.
Major upgrade/consolidation of machine
protection system (BIS) required.
50 ms
2nd Injection
from PS
100 GeV
1st Injection
from PS
14 GeV
1.2 s
Cycle / Pulse 3.6 sec. (every 6 seconds)
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
10.5 μs
2100 bunches
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Primary Beam: Transfer
• Branch-off from TT20 (with minimum impact).
• New transfer tunnel and line to be designed and build
(TT26).
• 66 existing magnets to be refurbished / consolidated.
• 2 new switching magnets to be build from existing design.
• ~ 39 new power converters
required.
• 9 high power DC and nonstandard converters
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Primary Beam: Beam Line
• Many other systems required :
–
–
–
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Beam instrumentation system, many new to be build
Vacuum system
Access and safety system
Beam interlock system…
• Upgrade/consolidation of TT20 to deal with fast extracted beams and to
add TT26.
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–
–
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Beam instrumentation
Beam interlock system
Warm interlock system
Optics to be adapted
• Surface building required:
– Power converters and other beam line related systems
– Ventilation and water cooling systems (spare capacity TT20 available?)
• The primary beam is a very challenging part of the project
• The aim is to minimize impact on already planned LS1 activities.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Secondary Beam: Facility Layout
• Design to minimise impact on environment
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–
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Target and decay pipe in helium vessel
Angle, distance and depth optimised to keep dose rate in EHN1 ≤ 1 μSv/h
Target shielding such that dose rates in the target building are ≤ 15 μSv/h
Water draining receives much attention
Target Cavern
and Building
Existing EHN1
Hadron Stopper and
muon detectors
Decay pipe
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Secondary Beam: Target Cavern
• Primary cooling and morgue
included in shielding of target
cavern.
• The “chase” design allows accessing the equipment from
above, minimising the volume around the target etc.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Secondary Beam: Focusing
• Focus pions at ~ 5 GeV
• Target partly inserted in horn
followed by reflector
• Far detector νμ spectrum
– Red: hypothetical perfect
focusing.
– Green: present design.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Secondary Beam: Hadron Stopper
• Graphite core with thick iron
shielding
– Aim to have low dose rates in EHN1.
– Suppress muons for near detectors.
• 1st layer of muon chambers inserted
in hadron stopper for low energy
muon detection.
• 2nd layer of muon chambers to allow
with 1st layer for neutrino beam
steering.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Near Detector Facility
• Extension of EHN1
LAGUNA-PROTO
requires also
charged particle
beam
ICARUS 150T
Use existing EHN1 services and
infrastructure where possible
NESSiE
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Near Detector Facility: EHN1 extension
• 3 detectors with space for a 4th
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Far Detector Facility
NESSiE
ICARUS 600T
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Far Detector Facility
• Just outside CERN fence, but still on CERN
territory
• ICARUS and NESSiE air core magnet assembled
elsewhere at CERN and lowered through the
roof.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Civil Engineering: overview
• New Junction cavern TT20-TT26.
• New beam line tunnel and shafts (TT26).
• New target, decay pipe and hadron stopper
facility.
• EHN1 extension.
• New far detector facility building.
• Roads, surface building, technical
galleries/trenches.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Civil Engineering: challenges
• In general: Environmental impact study.
• Building permits for all parts.
• Coring and radiation sampling is planned for
March.
• Example: Junction cavern is very time critical
• About 1 year of CE
work.
• Can only be done
when NA is
stopped (LS1).
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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•
•
•
•
Why a new CERN Neutrino Facility and how ?
The Four Main Facility Components
Project status, organisation, planning and cost
Summary
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
22
Project Planning
• Very challenging project planning
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Cost Estimate
• Preliminary cost estimate was made for LOI.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Present Status and Next Steps
• Presentation SPSC (15/01)  very positively received.
• LOI delivery to and Meeting with DG (11/02)
– LOI available in EDMS 1260766.
– Very positively received.
– Core cost should not be higher than 100 MCHF (25 MCHF
per year over 4 years.
• Presentation at upcoming Research Board
– RB delayed from 27/02 to 04/03 for CENF.
– Once approved by RB, integration in MTP.
• Goal: CERN Council approval in June.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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Project Organisation and Urgent Items
• Proper project structure to be setup
– Central project office.
– Manage all more general work packages.
• Three sub-projects:
– Primary beam.
– Secondary beam.
– Detector facilities (near and far).
• Urgent Items that require resources:
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–
–
–
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Junction cavern TT20-TT26 (design and planning).
Environmental impact study.
Detailed CE designs for permit and tender documents.
High-power and non-standard power converters design.
TT20 instrumentation and cabling.
Detailed horn and reflector design.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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•
•
•
•
Why a new CERN Neutrino Facility and how ?
The Four Main Facility Components
Project status, organisation, planning and cost
Summary
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
27
Summary
• A well thought basic design of the CENF is available
together with a cost estimate and (challenging)
planning.
• Physics requirements can be met.
• LOI positively received by DG and enlarged CERN
management.
• Much work ahead of us and urgent items are identified.
• The aim is to minimise the impact on planned LS1
activities, but some will be unavoidable.
• More detailed discussions with different departments
are ongoing or will start soon.
M. Nessi - R. Steerenberg
IEFC - 22 February 2013
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