nawrodt 23/03/2011 experimental approaches for the einstein telescope ronny nawrodt on behalf of the...
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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
beneficial
high laser power beneficial
CONFLICT?
#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 wfC
1Tk4)T,f(S
[Liu, Thorne 2000])T,f(S'C)T,f(S ITMTE
2FTM
FTMTE
[Braginsky 1999]
)T,f(Yw
1
f
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
Y
Y
'Y
Yw
d
f
Tk2)T,f(S ||22
Bx
[Braginsky, Fejer et al. 2004]
)(g1C
C
w
d
f
Tk8)T,f(S
2~2
sS
FS22
2B
TE
2
AVGSS
SFS
S2~
1E
E)21(
1
1
1C2
C
FF
F
F isinhRicosh
isinh
i
1Im)(g
2SS
2FF
2
F C
CRand
d
#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
[Na
wro
dt,
U J
en
a]
#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]
300C
600 C
800
C
400C
800
C
800
C
600 C
800
C
600 C
800
C
600 C
800
C
400C
600 C
800
C
400C
600 C
800
C
300C400C
600 C
800
C
[I.
Ma
rtin
, U
Gla
sgo
w]
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
ois
e [m
/ H
z]
bulk Brownianbulk TEcoating Browniancoating TEcoating TRtotal
20 K
100
101
102
103
104
10-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
100
101
102
103
104
10-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
8 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
10 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
12 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
14 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
16 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
18 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
20 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
22 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
24 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
26 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
28 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
30 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
40 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
50 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
60 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
70 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
80 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
90 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
100 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
110 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
115 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
120 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
125 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
130 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
140 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
150 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
200 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
250 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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]
CT
E [1
/K]
300 K10
010
110
210
310
410
-24
10-22
10-20
10-18
frequency [Hz]
the
rma
l no
ise
[m/
Hz]
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.
Bra
ccin
i et
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.
Pu
pp
o,
Ro
me
]
#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
#56/61
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
#59/61
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