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![Page 1: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/1.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
The GERDA Experiment at Gran Sasso
Grzegorz ZuzelInstitute of Physics, Jagellonian University, Cracow, Poland
on behalf of the GERDA Collaboration
![Page 2: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/2.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Outlook
• Goals of GERDA• Design of the experiment• Present status• Future plans and conclusions
![Page 3: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/3.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Goals of GERDA
GERDA’s goals
Present status
Deign
• GERDA (GERmanium Detector Array) has been designed to investigate neutrino-less double beta decay of 76Ge
- Ge mono-crystals are very pure - Ge detectors have excellent energy resolution - Detector = source - Enrichment required (7.4 % 86 %)
• Background level: 10-2 – 10-3 cts/(kg keV y)
• Realization in phases: - Phase I: 17.8 kg (8 diodes) of 76Ge from HdM & IGEX experiments available - Phase II: adding new detectors (37.5 kg of enriched material in hand, two technologies pursued: n-type segmented or p-type BEGe detectors) - Phase III: world-wide collaboration, O(500 kg) of 76Ge
Conclusions
![Page 4: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/4.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
GERDA’s goals
Present status
Deign
Conclusions
Sensitivities
KKDC
0.01
0.001
<mßß> ~ 0.1- 0.2 eV
phase II
phase I
![Page 5: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/5.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
GERDA’s goals
Present status
Deign
Conclusions
Sensitivities
mass hierarchy
inverted
normal
degenerate
A.S
tru
mia
& F
.Vis
san
i, h
ep
-ph
/ 0
50
32
46
Maj
ora
na
mas
s
phase II
phase I
phase III
mee
(ev
)
![Page 6: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/6.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Design of the experiment
GERDA’s goals
Present status
Deign
Conclusions
clean room
lock
water tank + veto
cryostat
cryo-mu-lab
control room
water plantRn monitor
![Page 7: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/7.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Cryostat
GERDA’s goals
Present status
Deign
Conclusionst=3/6 cm copper
Ø 4.2 m
h 8
.9 m
active cooling
V = 65 m3
Heat load: 200 W Active cooling with LN
Internal copper shield
Detailed radio assay- Construction materials- 222Rn emnation
![Page 8: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/8.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Cryostat
GERDA’s goals
Present status
Deign
Conclusionst=3/6 cm copper
Ø 4.2 m
h 8
.9 m
active cooling
V = 65 m3
Heat load: 200 W Active cooling with LN
Internal copper shield
Detailed radio assay- Construction materials- 222Rn emnation
Rn shroud of 30 μm copperØ 0.8m , 3m heightto prevent convective transport of Rn from walls/copper to Ge diodes
B ~ 1.5 10-4 cts / (keV۰kg۰y)
![Page 9: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/9.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Unloading of cryostat
GERDA’s goals
Present status
Deign
Conclusions
6 Mar 08
![Page 10: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/10.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Construction of water tank
GERDA’s goals
Present status
Deign
Conclusions
Water tank:
Ø 10 m h = 9.5 m
V = 650 m3
19 May 08
![Page 11: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/11.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Construction of clean room
GERDA’s goals
Present status
Deign
Conclusions
27 Feb 09
![Page 12: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/12.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Muon veto in water tank
GERDA’s goals
Present status
Deign
Conclusions
12 Aug 09
![Page 13: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/13.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
Present status of the experiment
GERDA’s goals
Present status
Deign
Conclusions
• GERDA construction completed in the LNGS Hall A
• Integration test of the Phase I detector string, FE electronics, active cooling, commissioning lock and Phase I DAQ successfully completed
• Filling with LAr completed
• All Phase I detectors (8 diodes, 17.8 kg) refurbished and ready
• Enriched/depleted material for phase II detectors in hand, tests of n-type segmented and p-type un-segmented BEGe detectors ongoing
• Low background test stand LArGe installed (investigation of new background reduction techniques)
![Page 14: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/14.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
• GERDA moving from construction phase to commissioning & operational mode
• Water filling to be started in Feb 2010
• Deployment of the first non-enriched detector string in Feb/March 2010, preparations for the enriched detectors deployment
• Down selection of the Phase II detectors in summer 2010, production in 2011
• Very close collaboration with the Majorana project (exchange information, development of MaGe)
• CERN Council: GERDA nominated as European Strategy Project
Future plans and conclusions
GERDA’s goals
Present status
Deign
Conclusions
![Page 15: Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland The GERDA Experiment at Gran.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c0041a28abf838cc4935/html5/thumbnails/15.jpg)
Cracow Epiphany Conference on Physics in Underground Laboratories and its Connection with LHC 05-08.01.2010 Cracow, Poland
~ 95 physicists from 17 institutions
The GERmanium Detector Array Collaboration http: //www.mpi-hd.mpg.de/GERDA
http: //www.mpi-hd.mpg.de/GERDA
GERDA collaboration excited to start-up