Nawrodt 23/03/2011 Experimental Approaches for the Einstein Telescope Ronny Nawrodt on behalf of the Einstein Telescope Science Team and the ET DS Writing Team Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena Sonderforschungsbereich Transregio 7 „Gravitationswellenastronomie“ Rencontres de Moriond and GPhyS Colloquium La Thuile 20-27 March 2011
Experimental Approaches for the Einstein Telescope
Feb 26, 2016
Experimental Approaches for the Einstein Telescope. Ronny Nawrodt on behalf of the Einstein Telescope Science Team and the ET DS Writing Team Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena Sonderforschungsbereich Transregio 7 „Gravitationswellenastronomie“ - PowerPoint PPT Presentation
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Nawrodt 23/03/2011
Experimental Approaches for the Einstein Telescope
Ronny Nawrodton behalf of the Einstein Telescope Science Team and the ET DS Writing Team
Institut für Festkörperphysik, Friedrich-Schiller-Universität JenaSonderforschungsbereich Transregio 7 „Gravitationswellenastronomie“
Rencontres de Moriond and GPhyS ColloquiumLa Thuile 20-27 March 2011
Nawrodt 23/03/2011
Overview
• previous talk: astro-physics with the Einstein Telescope
• aim: overview of experimental part of the design study and R&D for the Einstein Telescope
• content:
– sensitivity curve and implications for the setup– optical layout– thermal noise of optical components– suspensions– site selection and infrastructure
#2/61Moriond Meeting 2011
Nawrodt 23/03/2011
Sensitivity aims
• initial aim: sensitivity enhancement of about an order of magnitude in all of the frequency range form 1 Hz to 10 kHz
#3/61Moriond Meeting 2011
100
101
102
103
104
10-25
10-24
10-23
10-22
10-21
10-20
10-19
frequency [Hz]
h [1
/ H
z]
1st generation2nd generation3rd generation
seismicsuspensionradiation pressure
mirror thermal noise
photon shot noise
larger mass
larger beam dia.
higher laser power
Nawrodt 23/03/2011
Sensitivity aims
• To achive that goal all currently available techniques needs to be pushed to the limits and even beyond large field of upcoming R&D
• currently:– conceptual design study phase ongoing (2008 – 2011, FP7)– aim:
give a potential design for the infrastructure based on our current knowledge,summarise the astrophysical case for such a detector
– ET DS document currently put together (~350-400 pages) – presentation of the ET DS 20 May 2011 in Cascina
Moriond Meeting 2011 #4/61
Nawrodt 23/03/2011
Laser power vs. Cryogenics
Moriond Meeting 2011
100
101
102
103
104
10-25
10-24
10-23
10-22
10-21
10-20
10-19
frequency [Hz]
h [1
/ H
z]
1st generation2nd generation3rd generation
cryogenic temperatures
beneficialhigh laser
power beneficialCONFLICT?
#5/61
Nawrodt 23/03/2011
Optical layout – Xylophone concept
Moriond Meeting 2011
[S. Hild et al., CQG 27 (2010), ET note ET-0135B-10]
Low Frequency High Frequency
#6/61
Nawrodt 23/03/2011
Optical layout – Included Techniques
• high power lasers– 1064 nm for ET-HF (approx. 500 W)– 1550 nm for ET-LF (approx. 3 W)
• arm cavities– ET-HF 3 MW circulating in cavity– ET-LF 18 kW circulating in cavity
• power and signal recycling• 10dB squeezing• triangular shape, arm length 10 km• LG33 mode in ET-HF• …
Moriond Meeting 2011
[see talk by R. Schnabel afterwards]
focus on ET-LF
#7/61
[see talk by P. Kwee]
Nawrodt 23/03/2011
Thermal noise of optical components
• TN will be important for the ET-LF interferometer
• starting point: ET-LF mirror mass 211 kg (supress rad. pressure noise)(compare to ~ 40 kg in advanced detectors)
arm length: 10 km
• reduction of thermal noise by:– cryogenics– large beams– new materials– alternative techniques (e.g. replacements for classical coatings)
Moriond Meeting 2011
[see talk by F. Brückner in this session]
#8/61
Nawrodt 23/03/2011
Thermal noise - Bulk
Moriond Meeting 2011
• Thermo-elastic noise:
• Brownian thermal noise:
32222/5
222BITM
TE wfC1Tk4)T,f(S
[Liu, Thorne 2000])T,f(S'C)T,f(S ITMTE
2FTM
FTMTE
[Braginsky 1999]
)T,f(Yw
1f
Tk2)T,f(S substrate
2
2/3BITM
X
[Liu, Thorne 2000]
)T,f(SC)T,f(S ITMX
2FTM
FTMX [Bondu, Hello, Vinet 1998, Liu, Thorne 2000]
beam diameter
temperature
=0 possible for some materials, e.g. silicon (@ 18 and 125 K)
#9/61
Nawrodt 23/03/2011
Thermal noise - Coatings
Moriond Meeting 2011
beam diameter
temperature
• Thermo-elastic noise:
• Brownian thermal noise:
[Harry et al. 2002]
'Y
YY
'YYw
dfTk2)T,f(S ||22
Bx
[Braginsky, Fejer et al. 2004]
)(g1C
Cwd
fTk8)T,f(S
2~2
sS
FS22
2B
TE
2
AVGSS
SFS
S2~
1EE)21(
11
1C2C
FF
F
F isinhRicoshisinh
i1Im)(g
2SS
2FF
2
F CCRandd
#10/61
Nawrodt 23/03/2011
Thermal noise – Bulk Material
Moriond Meeting 2011
amorphous materials show a large loss peak at low temperatures
crystalline materials well suited for cryogenic use
[Naw
rodt
, U J
ena]
#11/61
Nawrodt 23/03/2011
Thermal noise – Material Choice
• two candidate materials
Moriond Meeting 2011
Sapphire Silicon
mechanical loss ++ ++
mechanical strength +(+)* ++
optical material + o
thermal conductivity ++ ++
polishing - +
size availability -…+ +…++(semicond. industry)
* bond strength might not be sufficient (silicate bonding) (further investigation needed)
#12/61
Nawrodt 23/03/2011
Thermal noise – Coatings
• coating thermal noise dominates all other thermal noise sources of the mirrors in current detectors (coating = amorphous)
• large R&D ongoing to understand loss mechanisms
Moriond Meeting 2011
[see talk by S. Rowan on Saturday]
300C600 C
800
C
400C
800
C
800
C
600 C
800
C
600 C
800
C
600 C
800
C
400C600 C
800
C
400C600 C
800
C
300C400C600 C
800
C
[I. M
artin
, U G
lasg
ow]
annealing tantala to different temperatures
#13/61
Nawrodt 23/03/2011
Thermal Noise - Estimates
Moriond Meeting 2011
100
101
102
103
104
10-24
10-22
10-20
10-18
frequency [Hz]th
erm
al n
oise
[m/
Hz]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
20 K
100
101
102
103
104
10-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
300 K
Si(111) test massHR stack (18 doublets, Ta2O5:TiO2, SiO2)
® w=90mm needed to supress coating Brownian noise® test mass dia. ~ 50cm, thickness: ~46cm (to reach 211kg)
#14/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
100
101
102
103
104
10-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
5 K
Moriond Meeting 2011 #15/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
8 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #16/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
10 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #17/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
12 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #18/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
14 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #19/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
16 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #20/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
18 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #21/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
20 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #22/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
22 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #23/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
24 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #24/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
26 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #25/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
28 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #26/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
30 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #27/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
40 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #28/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
50 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #29/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
60 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #30/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
70 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #31/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
80 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #32/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
90 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #33/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
100 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #34/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
110 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #35/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
115 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #36/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
120 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #37/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
125 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #38/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
130 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #39/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
140 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #40/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
150 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #41/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
200 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #42/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
250 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #43/61
Nawrodt 23/03/2011
Thermal Noise – Temperature Dependence
0 50 100 150 200 250 300-0.5
0
0.5
1
1.5
2
2.5
3x 10
-6
temperature [K]
CTE
[1/K
]
300 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
ther
mal
noi
se [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
Moriond Meeting 2011 #44/61
Nawrodt 23/03/2011
Thermal Noise – Choice of Temperature
• all temperatures below 20 K are suited from the point of thermal noise
• design choice: 10 K operational temperature at the mirror to allow safety in (so far) unknown/badly known material parameters
• cryogenic test mass• Si(111)• temperature 10 K• diameter: 45…50cm• thickness: 45…60cm• mass: 211kg
10 K
SEMICONDUCTORindustry
Moriond Meeting 2011 #45/61
Nawrodt 23/03/2011
Suspensions - Overview
• requirements:– suspend 211 kg of test mass– low thermal noise contribution– seismic isolation– keep the temperature constant at the test masses (10 K)– reduced gravity gradient noise (underground + GGN reduction)
• split into upper and lower suspension
Moriond Meeting 2011
seismic isolation
additionally: going underground for Newtonian noise reduction
low thermal noiseextraction of heat
#46/61
Nawrodt 23/03/2011
Suspensions – Upper suspension
Moriond Meeting 2011
• Superattenuator will be adopted to the ET requirements for the upper stage
• total height: 17 meters• 6 stages (equal dist. spacing)
#47/61
S. B
racc
ini e
t al.
GW
AD
W K
yoto
Nawrodt 23/03/2011
Suspensions – Lower Stage
Moriond Meeting 2011
modelling suspension thermal noise [P. Puppo, Rome]
investigation of surface losses in silicon [U Jena/ U Glasgow]
#48/61
Nawrodt 23/03/2011
Suspensions – Lower Stage
Moriond Meeting 2011
suspension design is compliant with the thermal noise requirements
[P. P
uppo
, Rom
e]
#49/61
Nawrodt 23/03/2011
Suspensions – Lower Stage
Moriond Meeting 2011
heat extraction through lower stage [P. Puppo, Rome]
#50/61
Nawrodt 23/03/2011
Suspensions – Lower Stage
Moriond Meeting 2011
equilibrium temperatures at the test mass
INFRASTRUCTUREsuspensions
vacuum
cryogenics
#51/61
Nawrodt 23/03/2011
Site selection and infrastructure
• scientific issues for the site selection
– low seismic activities („proper“ underground)– far away from disturbance sources (e.g. cities, shores, etc.)– possibility for infrastructure (electricity, roads, building, …)
• intensive study of seismic at different locations within the ET conceptual design study
• systematic study and modelling of seismic in different places– seismic noise– FEA based models
Moriond Meeting 2011 #52/61
Nawrodt 23/03/2011
Site selection and infrastructure
Moriond Meeting 2011 #53/61
Nawrodt 23/03/2011
Site selection and infrastructure
Moriond Meeting 2011 #54/61
Nawrodt 23/03/2011
Site selection and infrastructure
• large focus of the ET design study on infrastructure
• building the infrastructure will be the largest financial part of the observatory
• aim: to build a long term infrastructure containing upgradable instruments
Moriond Meeting 2011 #55/61
Nawrodt 23/03/2011
Site selection and infrastructure
Moriond Meeting 2011
artist view of ET
end station
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Nawrodt 23/03/2011
Site selection and infrastructure - Access
Moriond Meeting 2011
vertical vs. horizontal access
#57/61
Nawrodt 23/03/2011
Site selection and infrastructure
Moriond Meeting 2011
NIKHEF
#58/61
Nawrodt 23/03/2011
Site selection and infrastructure - Cryogenics
Moriond Meeting 2011
from: INFN
LHe cooling option
pulse tube cooling option
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Nawrodt 23/03/2011
Site selection and infrastructure - Cryogenics
Moriond Meeting 2011
cryotrap
cryogenic infrastructure
#60/61
Nawrodt 23/03/2011
Summary
• ET will be an infrastructure to host several detectors (2 IF each)• 10x more amplitude sensitivity compared to adv. detectors• ET conceptual design study very successful R&D ongoing• outcome: design study document containing science case, infra- structure, optics, suspensions, …• public day 20/05/2011 in Cascina
• ET homepage with more information: www.et-gw.eu
Moriond Meeting 2011 #61/61
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