Neutrinoless double beta decay search using Xe: The …...Neutrinoless double beta decay search...
Transcript of Neutrinoless double beta decay search using Xe: The …...Neutrinoless double beta decay search...
-
Neutrinoless double beta decay search using 136Xe: The NEXT
experiment.
LAL Seminar, December 2011.
Héctor Gómez Maluenda
-
LAL Seminar. December 2011 2
OUTLINE
Neutrino and double beta decay.
The Experiment.Why HP Xe TPC?
The SOFT concept.
Present Status.Prototypes.
NEXT-μM.
NEXT-100.
Outlook.
Summary.
-
LAL Seminar. December 2011 3
NEUTRINO AND DOUBLE BETA DECAY
Neutrino oscillation experiments have shown that neutrino is a non-zero mass particle, implying the existence of Physics beyond the Standard Model of Particles.
-
LAL Seminar. December 2011 4
NEUTRINO AND DOUBLE BETA DECAY
Neutrino oscillation experiments have shown that neutrino is a non-zero mass particle, implying the existence of Physics beyond the Standard Model of Particles.
It is also known that neutrino mass could have two different mass hierarchies: normal and inverse.
Normal hierarchy: m1
∼m2
>m3 (Δm23)2
-
LAL Seminar. December 2011 5
NEUTRINO AND DOUBLE BETA DECAY
Neutrino oscillation experiments have shown that neutrino is a non-zero mass particle, implying the existence of Physics beyond the Standard Model of Particles.
It is also known that neutrino mass could have two different mass hierarchies: normal and inverse.
Unfortunately, neutrino oscillation experiments can only measure (Δmij )2.
HOW TO MEASURE THE ABSOLUTE MASS VALUE OF THE NEUTRINO?
End point study of the 3H decay energy spectrum
(KATRIN)
Upper limits from Astrophysical Observations
(SN 1987-A)
NEUTRINOLESS DOUBLE BETA DECAY DETECCTION
(0νββ)
-
LAL Seminar. December 2011 6
NEUTRINO AND DOUBLE BETA DECAY
Double beta decay processes:
d
d
u
u
W
W
e
eν
ν
x
d
d
u
u
W
W
e
eν
d
d
u
u
W
W
e
eν
ν
d
d
u
u
W
W
e
eν
ν
x
d
d
u
u
W
W
e
eν x
d
d
u
u
W
W
e
eν
( )( )2220
02222
=++→
=+++→−−−
−−−
ΔL; e)(A,Z:(A,Z)βνβ
ΔL; νe)(A,Z:(A,Z)βνβ e
( ) 21021
2
220
2
20
010
21 00
/ν/Neν
e
ννF
A
VνGTν
ν/
TFmm
mm
MggMG)(T
−
−++
=
−=→
0νββ process detection:
∑=j
jejmUm2
ν
ν Majoranaνν ⇒=
2νββ0νββ
-
LAL Seminar. December 2011 7
NEUTRINO AND DOUBLE BETA DECAY
Study of the 0νββ decay for almost 20 years. Some experiments already finished:
Experiment Isotope Technique LaboratoryResults
T1/20ν (y) (eV)
IGEX 76Ge Ge Diodes Canfranc ≥
1.57 1025 ≤
0.33-1.35
HEIDELBERG- MOSCOW
76Ge Ge Diodes Gran Sasso ≥
1.55 1025 ≤
0.35
HEIDELBERG- MOSCOW*
76Ge Ge Diodes Gran Sasso 1.20 1025 0.44
MIBETA128Te
Bolometers Gran Sasso≥
8.60 1022≤
1-2130Te ≥
1.44 1023
CUORICINO 130Te Bolometers Gran Sasso ≥
3.00 1024 ≤
0.19-0.68
NEMO 3100Mo Track
+ Calorimetry Modane
≥
1.00 1024 ≤
0.31-0.96
82Se ≥
3.2 1023 ≤
0.94-2.60
*H.V. Klapdor-Kleingrothaus
et al. Phys. Lett. B 578:54 & 586:198 (2004)
-
LAL Seminar. December 2011 8
NEUTRINO AND DOUBLE BETA DECAY
Where are we going now? New generation experiments.
Trying to reach sensitivities to explore ~ 50 meV.
Some requirements are mandatory:Big amount of ββ emitter mass.
Radiopure materials.
Placement underground.
Background events discrimination.
…
Klapdor’s claim could be checked.
50 meV
KK claim
-
LAL Seminar. December 2011 9
NEUTRINO AND DOUBLE BETA DECAY
If no signal is found:
bΓMTε
Wf.Fat
D2610174 ×=
• Isotopic abundance ↑↑
• Atomic weight ↓↓
• Detection efficiency ↑↑
• Exposure ↑↑
• Background level ↓↓
• Energy resolution ↓↓
Several techniques, isotopes and detectors proposed trying to optimize FD
.
( ) 21021 /ν/Neν TFmm −= ( )21/
DNeν FFmm−
-
LAL Seminar. December 2011 10
NEUTRINO AND DOUBLE BETA DECAY
Experiment Isotope Technique Main StrengthCANDLES 48Ca CaF2
Scintillation Background, Efficiency
CARVEL 48Ca CaWO4
Scintillation Mass, Efficiency
COBRA 130Te, 116Cd ZnCdTe
Semiconductors Resolution, Efficiency
CUORE 130Te Bolometers Resolution, EfficiencyCUORICINO 130Te Bolometers Resolution, Efficiency
DCBA 150Nd Gaseous TPC Bkg Rejection, EfficiencyEXO 136Xe TPC Ionization + Scintillation Mass, Efficiency, Final State Signal
GERDA 76Ge Ge
Diodes Resolution, Efficiency
MAJORANA 76Ge Ge
Diodes Resolution, Efficiency
MOON 100Mo Tracking + Calorimetry Compactness, Bkg RejectionNEXT 136Xe Tracking + Calorimetry Bkg Rejection, Efficiency
SNO++ 150Nd Nd
Liquid Scintillation Mass, Efficiency
SUPERNEMO 82Se, 150Nd Tracking + Calorimetry Bkg Rejection, Isotope SelectionXMASS 136Xe Liquid Xe Mass, Efficiency
YANGYANG 124Sn Sn
Liquid Scintillation Mass, Efficiency
Some new generation 0νββ experiments:
-
LAL Seminar. December 2011 11
NEUTRINO AND DOUBLE BETA DECAY
Experiment Isotope Technique Main StrengthCANDLES 48Ca CaF2
Scintillation Background, Efficiency
CARVEL 48Ca CaWO4
Scintillation Mass, Efficiency
COBRA 130Te, 116Cd ZnCdTe
Semiconductors Resolution, Efficiency
CUORE 130Te Bolometers Resolution, EfficiencyCUORICINO 130Te Bolometers Resolution, Efficiency
DCBA 150Nd Gaseous TPC Bkg Rejection, EfficiencyEXO 136Xe TPC Ionization + Scintillation Mass, Efficiency, Final State Signal
GERDA 76Ge Ge
Diodes Resolution, Efficiency
MAJORANA 76Ge Ge
Diodes Resolution, Efficiency
MOON 100Mo Tracking + Calorimetry Compactness, Bkg RejectionNEXT 136Xe Tracking + Calorimetry Bkg Rejection, Efficiency
SNO++ 150Nd Nd
Liquid Scintillation Mass, Efficiency
SUPERNEMO 82Se, 150Nd Tracking + Calorimetry Bkg Rejection, Isotope SelectionXMASS 136Xe Liquid Xe Mass, Efficiency
YANGYANG 124Sn Sn
Liquid Scintillation Mass, Efficiency
Some new generation 0νββ experiments:
-
LAL Seminar. December 2011 12
THE EXPERIMENT
The NEXT (Neutrino Experiment with a Xenon TPC) experiment expects tomeasure the 0νββ decay of 136Xe using a high pressure Xenon TPC.
U. Coimbra
U. Aveiro CEA-Saclay
JINR
IFIC, U. A. Madrid, U. GironaU. Politécnica
Valencia,
U. Santiago, U. Zaragoza.
LBNL, Texas A&M, J. Hopkins
U. Antonio Nariño, Bogotá
-
LAL Seminar. December 2011 13
bΓMTε
Wf.Fat
D2610174 ×=( ) 21/DNeν FFmm −<
THE EXPERIMENT
The NEXT (Neutrino Experiment with a Xenon TPC) experiment expects tomeasure the 0νββ decay of 136Xe using a high pressure Xenon TPC.
WHY A HP XENON TPC?Let’s try to find the answer in these equations:
-
LAL Seminar. December 2011 14
bΓMTε
Wf.Fat
D2610174 ×=( ) 21/DNeν FFmm −<
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.
-
LAL Seminar. December 2011 15
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.
( ) 21/DNeν FFmm −
-
LAL Seminar. December 2011 16
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.
( ) 21/DNeν FFmm −
-
LAL Seminar. December 2011 17
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses.
( ) 21/DNeν FFmm −
-
LAL Seminar. December 2011 18
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses. High Qββ value (2457.83 keV).
Qββ
(136Xe) = 2457.83 keVM. Redshaw
et al, PRL 98 (2007) 053003
( ) 21/DNeν FFmm −
-
LAL Seminar. December 2011 19
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses. High Qββ value (2457.83 keV).Long T1/22νββ (2.11 ± 0.048(stat.) ± 0.21(sys.) x 1021 y).
( ) 21/DNeν FFmm −<
arXiv: 1108.4193v2 [nucl-ex]
-
LAL Seminar. December 2011 20
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses. High Qββ value (2457.83 keV).Long T1/22νββ (2.11 ± 0.048(stat.) ± 0.21(sys.) x 1021 y).Possibility to detect Ionization/Scintillation and to study Tracking.
( ) 21/DNeν FFmm −
-
LAL Seminar. December 2011 21
bΓMTε
Wf.Fat
D2610174 ×=
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses. High Qββ value (2457.83 keV).Long T1/22νββ (2.11 ± 0.048(stat.) ± 0.21(sys.) x 1021 y).Possibility to detect Ionization/Scintillation and to study Tracking.Good energy resolution.
( ) 21/DNeν FFmm −
-
LAL Seminar. December 2011 22
( ) 21/DNeν FFmm −<
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses. High Qββ value (2457.83 keV).Long T1/22νββ (2.11 ± 0.048(stat.) ± 0.21(sys.) x 1021 y).Possibility to detect Ionization/Scintillation and to study Tracking.Good energy resolution.FN is worse if compared with other isotopes.
bΓMTε
Wf.Fat
D2610174 ×=
-
LAL Seminar. December 2011 23
THE EXPERIMENT
Xe is not difficult to enrich.Ability of purification and reuse of the enriched Xe.136Xe has higher Wat compared with other isotopes considered.Source = detector experiment.High pressure Bigger amount of emitter.Scalable to higher masses. High Qββ value (2457.83 keV).Long T1/22νββ (2.11 ± 0.048(stat.) ± 0.21(sys.) x 1021 y).Possibility to detect Ionization/Scintillation and to study Tracking.Good energy resolution.FN is worse if compared with other isotopes.
Difficulty to design a compact experiment.Typical problems coming from working at High Pressure (~10 bars).
( ) 21/DNeν FFmm −< bΓMTε
Wf.Fat
D2610174 ×=
-
LAL Seminar. December 2011 24
THE EXPERIMENT
The NEXT (Neutrino Experiment with a Xenon TPC) experiment expects tomeasure the 0νββ decay of 136Xe using a high pressure Xenon TPC.
Events detection is based on the SOFT TPC concept.Separated-Optimized Energy Function from Tracking
-
LAL Seminar. December 2011 25
THE EXPERIMENT
SOFT TPC: Separate-Optimized Energy Function from Tracking.
The experiment will have a better sensitivity if we are capable to obtain as accurate as possible:
Energy of the event (with good resolution).
Time of the event (t0, related to z position).
Track of all the particles of the event.
These characteristics will allow not only to determine the energy of the event, but also to reconstruct it in order to apply pattern recognition to discriminatebackground events from 0νββ ones.
-
LAL Seminar. December 2011 26
THE EXPERIMENT
SOFT TPC: Separate-Optimized Energy Function from Tracking.
Electroluminescence region (higher E)SiPM
plane
Field Cage
PMT plane
E
-
LAL Seminar. December 2011 27
THE EXPERIMENT
SOFT TPC: Separate-Optimized Energy Function from Tracking.
SiPM
plane:Electroluminescence Light Tracking
Field Cage
PMT plane:Primary scintillation t0Electroluminescence Light Energy
E
-
LAL Seminar. December 2011 28
PRESENT STATUS: PROTOTYPES
Different small and medium size TPCs to test and improve elements that will be used in the final setup.
Detectors: Energy Resolution, Time Stability…
Vessel and internal components: Outgassing, Leak rates…
DAQ
There are still decisions to be taken about some features of NEXT-100.
NEXT DBDM NEXT DEMO NEXT μM
-
LAL Seminar. December 2011 29
PRESENT STATUS: PROTOTYPES
NEXT DBDM:
Test PMTs energy resolution in HP Xe (up to 15 bar).
-
LAL Seminar. December 2011 30
PRESENT STATUS: PROTOTYPES
NEXT DBDM:
Test PMTs energy resolution in HP Xe (up to 15 bar).
Promising results.
1% FWHM @ 662 keVDrift Field: 0.05 kV/cm/bar
EL Field: 2 kV/cm/bar
Primary Scint. also observed
Work with higher Drift Fields.
Radial dependence and other points to clarify.
-
LAL Seminar. December 2011 31
PRESENT STATUS: PROTOTYPES
NEXT DEMO:
Analog to the NEXT-100 baseline detector concept.
Ø = 16 cm Vs ~ 1 lØ = 16 cm SV ~ 6 l
mXe
~ 0.34 kg @ 10 bar
-
LAL Seminar. December 2011 32
PRESENT STATUS: PROTOTYPES
NEXT DEMO:
Analog to the NEXT-100 baseline detector concept.
PMT Plane (t0
and Energy) SiPM
Plane (Tracking)
-
LAL Seminar. December 2011 33
PRESENT STATUS: PROTOTYPES
NEXT DEMO:
Analog to the NEXT-100 baseline detector concept.
Prototype just commissioned (only preliminary calibrations done).
S1 S2
-
LAL Seminar. December 2011 34
PRESENT STATUS: PROTOTYPES
NEXT μM:
Testing of different Xe-base mixtures (effects on the energy resolution).
Outgassing and Leak Rates for Feedthorughs and internal components.
But Also…
-
LAL Seminar. December 2011 35
PRESENT STATUS: PROTOTYPES
NEXT μM:
Testing of different Xe-base mixtures (effects on the energy resolution).
Outgassing and Leak Rates for Feedthorughs and internal components.
But Also…
Study of Micromegas detector as alternative to the baseline.
No operational problems in HP
Long term stability
Radiopure solution
Capable to register energy and tracking
Ongoing studies to see EL
…
-
LAL Seminar. December 2011 36
PRESENT STATUS: PROTOTYPES
NEXT μM:
Testing of different Xe-base mixtures (effects on the energy resolution).
Outgassing and Leak Rates for Feedthorughs and internal components.
But Also…
Study of Micromegas detector as alternative to the baseline.
No operational problems in HP
Long term stability
Radiopure solution
Capable to register energy and tracking
Ongoing studies to see EL
…
S. Cebrián et al, Astrop
Phys 34 (2011) 354-359
-
LAL Seminar. December 2011 37
PRESENT STATUS: PROTOTYPES
NEXT μM:
Testing of different Xe-base mixtures (effects on the energy resolution).
Outgassing and Leak Rates for Feedthorughs and internal components.
But Also…
Study of Micromegas detector as alternative to the baseline.
No operational problems in HP
Long term stability
Radiopure solution
Capable to register energy and tracking
Ongoing studies to see EL
…
-
LAL Seminar. December 2011 38
PRESENT STATUS: PROTOTYPES
NEXT μM:
~ 79 l Stainless Steel Chamber.
Ø = 28 cm and 35 cm Drift Length for 21.5 l of sensitive volume.
Up to ~1.2 kg of Xe @ 10 bar in the sensitive volume.
-
LAL Seminar. December 2011 39
PRESENT STATUS: PROTOTYPES
NEXT μM:
~ 79 l Stainless Steel Chamber.
Ø = 28 cm and 35 cm Drift Length for 21.5 l of sensitive volume.
Up to ~1.2 kg of Xe @ 10 bar in the sensitive volume.
In a first step the prototype was fully equipped with:
Bulk mM detector Ø ~ 30 cm.
Copper + Peek + Cirlex Field Cage.
Teflon + Copper HV Feedthrough.
Readout Feedthrough.
-
LAL Seminar. December 2011 40
PRESENT STATUS: PROTOTYPES
NEXT μM:
~ 79 l Stainless Steel Chamber.
Ø = 28 cm and 35 cm Drift Length for 21.5 l of sensitive volume.
Up to ~1.2 kg of Xe @ 10 bar in the sensitive volume.
In a first step the prototype was fully equipped with:
Bulk mM detector Ø ~ 30 cm.
Copper + Peek + Cirlex Field Cage.
Teflon + Copper HV Feedthrough.
Readout Feedthrough.
-
LAL Seminar. December 2011 41
PRESENT STATUS: PROTOTYPES
NEXT μM:
~ 79 l Stainless Steel Chamber.
Ø = 28 cm and 35 cm Drift Length for 21.5 l of sensitive volume.
Up to ~1.2 kg of Xe @ 10 bar in the sensitive volume.
In a first step the prototype was fully equipped with:
Bulk mM detector Ø ~ 30 cm.
Copper + Peek + Cirlex Field Cage.
Teflon + Copper HV Feedthrough.
Readout Feedthrough.
-
LAL Seminar. December 2011 42
PRESENT STATUS: PROTOTYPES
NEXT μM:
~ 79 l Stainless Steel Chamber.
Ø = 28 cm and 35 cm Drift Length for 21.5 l of sensitive volume.
Up to ~1.2 kg of Xe @ 10 bar in the sensitive volume.
In a first step the prototype was fully equipped with:
Bulk mM detector Ø ~ 30 cm.
Copper + Peek + Cirlex Field Cage.
Teflon + Copper HV Feedthrough.
Readout Feedthrough.
-
LAL Seminar. December 2011 43
PRESENT STATUS: PROTOTYPES
NEXT μM:
~ 79 l Stainless Steel Chamber.
Ø = 28 cm and 35 cm Drift Length for 21.5 l of sensitive volume.
Up to ~1.2 kg of Xe @ 10 bar in the sensitive volume.
In a first step the prototype was fully equipped with:
Bulk mM detector Ø ~ 30 cm.
Copper + Peek + Cirlex Field Cage.
Teflon + Copper HV Feedthrough.
Readout Feedthrough.
Before to measure:
Pressure Tests
Vacuum and Outgassing measurements
HV and many others…
-
LAL Seminar. December 2011 44
0 50 100 150 200 250 30010,75
10,80
10,85
10,90
10,95
11,00
11,05
NEXT I pressure (bar) Temperature (؛C)
Time (hours)
Pre
ssur
e (b
ar)
20
21
22
23
24
25
26
27
28
Temperature (؛C
)
PRESENT STATUS: PROTOTYPES
NEXT μM: Pressure Tests.
Useful to test the vessel but also the Gas System to put the gas inside the vessel (valves, flowmeters, …)
11 bar of Ar
Monitoring of P and T
-
LAL Seminar. December 2011 45
PRESENT STATUS: PROTOTYPES
NEXT μM: Pressure Tests.
Useful to test the vessel but also the Gas System to put the gas inside the vessel (valves, flowmeters, …)
0 50 100 150 200 250 3000.03660
0.03665
0.03670
0.03675
0.03680
P/T
(bar
/K)
Time (hours)
11 bar of Ar
Monitoring of P and T
11 bars
constant during
more than 10 days
-
LAL Seminar. December 2011 46
PRESENT STATUS: PROTOTYPES
NEXT μM: Vacuum and outgassing measurements.
To keep the purity of gas, elements in contact must not emanate any contaminant.
In principle the inner materials were chosen with this purpose.
Bake-out cycles To “clean” possible impurities.
0
0
ttVolume)P(P(t)
sl mbar Outgassing
−×−
=⎟⎠⎞
⎜⎝⎛ ×
0 20 40 60 80 100 120 140 160 18010-7
10-6
10-5
10-4
10-3
10-2
10-1
100
101
102
103
Time (hours)
Pre
ssur
e (m
bar)
Pressure (mbar) Control Temperature (؛C) "Environmental" Temperature (؛C)
0
20
40
60
80
100
120
140
160
180
200
Temperature (؛C
)
0 50 100 150 200 250 300 350 4000,0
2,0x10-5
4,0x10-5
6,0x10-5
8,0x10-5
1,0x10-4
Pres
sure
(mba
r)
Time (s)
P < 10-6
mbar Og
< 10-6
mbar l/s
-
LAL Seminar. December 2011 47
PRESENT STATUS: PROTOTYPES
NEXT μM: Other tests.
HV tests to check that Electric Field needed for the Drift is reachable.
Installation of the electronics close to the vessel.
DAQ based on AFTER chip.
Possibility to read mesh (E) and pixels (track) of the μM simultaneously.
-
LAL Seminar. December 2011 48
PRESENT STATUS: PROTOTYPES
NEXT μM: First measurements.222Rn source diffused in the gas (Ar-iC4H10 5%)
~ 6 MeV α inside the sensitive volume.
0 1000 2000 30000
20
40
60
80
100
120
140
160
180
200
Cou
nts/
Cha
nnel
(1.5
hou
rs)
Ch
Vpixel = 250 VVdrift = 3000 V
Mesh
Spe
ctrum
-
LAL Seminar. December 2011 49
PRESENT STATUS: PROTOTYPES
NEXT μM: First measurements.222Rn source diffused in the gas (Ar-iC4H10 5%)
~ 6 MeV α inside the sensitive volume.
-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 7510
11
12
13
14
15
16
17
18
Rat
e (H
z)
Time (hours)
R=R0 e-λt
R0 = 17.5 +- 0.05
λ = 140.55 +- 1.66 h-1
T1/2 = 4.05 +- 0.05 days
-
LAL Seminar. December 2011 50
PRESENT STATUS: PROTOTYPES
NEXT μM: First measurements.222Rn source diffused in the gas (Ar-iC4H10 5%)
~ 6 MeV α inside the sensitive volume.
3-D Energy Distribution 2-D Event Reconstruction
-
LAL Seminar. December 2011 51
PRESENT STATUS: PROTOTYPES
NEXT μM: Presents Status.
Prototype fully operative with Bulk μM.
Possible to register Energy and 2-D tracks.
Next steps:
Installation of microbulk mM LARGEST SURFACE COVERED
Complete the system to register t0 3-D tracks
-
LAL Seminar. December 2011 52
PRESENT STATUS: NEXT 100
NEXT 100 will be placed at Canfranc Underground Laboratory (LSC), in the Spanish Pyrenees (2450 m.w.e.).
-
LAL Seminar. December 2011 53
PRESENT STATUS: NEXT 100
NEXT 100 time schedule:
Commissioning of the detector along 2013.
Start data taking in 2014.
Technical Detector Report (TDR) finished:
Pressure Vessel (SS + internal Cu shielding)
-
LAL Seminar. December 2011 54
PRESENT STATUS: NEXT 100
NEXT 100 time schedule:
Commissioning of the detector along 2013.
Start data taking in 2014.
Technical Detector Report (TDR) finished:
Pressure Vessel (SS + internal Cu shielding)
Field Cage
-
LAL Seminar. December 2011 55
PRESENT STATUS: NEXT 100
NEXT 100 time schedule:
Commissioning of the detector along 2013.
Start data taking in 2014.
Technical Detector Report (TDR) finished:
Pressure Vessel (SS + internal Cu shielding)
Field Cage
PMTs and MPPCs
-
LAL Seminar. December 2011 56
PRESENT STATUS: NEXT 100
NEXT 100 time schedule:
Commissioning of the detector along 2013.
Start data taking in 2014.
Technical Detector Report (TDR) finished:
Pressure Vessel (SS + internal Cu shielding)
Field Cage
PMTs and MPPCs
Shielding
-
LAL Seminar. December 2011 57
PRESENT STATUS: NEXT 100
NEXT 100 time schedule:
Commissioning of the detector along 2013.
Start data taking in 2014.
Technical Detector Report (TDR) finished:
Pressure Vessel (SS + internal Cu shielding)
Field Cage
PMTs and MPPCs
Shielding
Radiopurity measurements Bkg Model
Simulations
…
EXPECTED TO REACH THE ~ 50 meV SENSITIVITY
-
LAL Seminar. December 2011 58
OUTLOOK
PROTOTYPES:
Data taking and test of different element and techniques that will be used in NEXT 100.
NEXT 100:
Construction and Commissioning of Shielding and Gas System (2012).
Final Design and Manufacture of Pressure Vessel (2011-2012).
Construction and Characterization of Detector Planes (2012).
Construction of Field Cage and HV Feedthroughs (2012).
Commissioning of NEXT 100 at LSC (from ~ June 2013).
Start Data Taking (2014).
-
LAL Seminar. December 2011 59
SUMMARY
0νββ is a hot topic in Particle Physics.
New generation experiments aim to explore new regions for the neutrino effective mass around 50 meV.
NEXT experiment expects to reach this sensitivity using a HP Xe TPC.
NEXT prototypes are showing that the technology chosen could be suitable for this objective.
NEXT 100 design is already finished and works to construct the setup will start in 2012.
The goal is to start the data taking in 2014.
IS A REALLY AMBICIOUS TIME LINE… BUT LET’S TRY IT
-
Neutrinoless double beta decay search using 136Xe: The NEXT
experiment.
LAL Seminar, December 2011.
Héctor Gómez Maluenda
Número de diapositiva 1Número de diapositiva 2Número de diapositiva 3Número de diapositiva 4Número de diapositiva 5Número de diapositiva 6Número de diapositiva 7Número de diapositiva 8Número de diapositiva 9Número de diapositiva 10Número de diapositiva 11Número de diapositiva 12Número de diapositiva 13Número de diapositiva 14Número de diapositiva 15Número de diapositiva 16Número de diapositiva 17Número de diapositiva 18Número de diapositiva 19Número de diapositiva 20Número de diapositiva 21Número de diapositiva 22Número de diapositiva 23Número de diapositiva 24Número de diapositiva 25Número de diapositiva 26Número de diapositiva 27Número de diapositiva 28Número de diapositiva 29Número de diapositiva 30Número de diapositiva 31Número de diapositiva 32Número de diapositiva 33Número de diapositiva 34Número de diapositiva 35Número de diapositiva 36Número de diapositiva 37Número de diapositiva 38Número de diapositiva 39Número de diapositiva 40Número de diapositiva 41Número de diapositiva 42Número de diapositiva 43Número de diapositiva 44Número de diapositiva 45Número de diapositiva 46Número de diapositiva 47Número de diapositiva 48Número de diapositiva 49Número de diapositiva 50Número de diapositiva 51Número de diapositiva 52Número de diapositiva 53Número de diapositiva 54Número de diapositiva 55Número de diapositiva 56Número de diapositiva 57Número de diapositiva 58Número de diapositiva 59Número de diapositiva 60