|GENIUS-TF: A Test Facility for the GENIUS-Project|
|The first four naked high-purity Germanium detectors were installed successfully in liquid nitrogen in the GENIUS-Test-Facility in the GRAN SASSO Underground Laboratory on May 5, 2003. This is the first time ever that this novel technique aiming at extreme background reduction in search for rare decays is going to be tested underground. First operational parameters are presented.|
The first contacted four naked detectors
in the low-level holder in which they are put into the shielded
liquid nitrogen container of GENIUS-TF.
Cross section of the setup (GENIUS-TF-I).
Collaboration for GENIUS-TF
Design of the GENIUS-TF setup. The HPGe crystals are located inside a polystyrene box, which is serving as the liquid nitrogen dewar. To minimize the influence of the intrinsic polystyrene impurities, an additional inner shielding layer of zone-refined Germanium is used. The box is surrounded by a subsequent layer of low-level lead or copper which is enclosed in a borated polyethylene shield.
We propose to install a setup with up to 14 HPGe-detectors corresponding to an active mass of ~ 40 kg on small scale. The 14 detectors would provide one module (or a modular part) of the final support structure for GENIUS. The desing is shown in Figure.
The background considerations and simulations suggest that a reduction of the background by a factor of ~ 5 with respect to the HEIDELBERG-MOSCOW experiment can be attained with the proposed setup. This would lead to a background index of ~ 4 counts/(kg keV y) for the GENIUS-TF.
|The GENIUS-TF could clearly identify the annual modulation signature favored by the recent DAMA data within some years.|
For more information, please look into articles:
" 'Naked' crystals go underground"
, hep-ph/ /0307???,
CERN CUERIER 43, Number 6 , Page 9 (2003)
H.V. Klapdor-Kleingrothaus, I. V. Krivosheina, H. Strecker and
"First 10 kg of naked Germanium detectors in liquid nitrogen installed in
hep-ph/ /0307???, Nucl. Instrum. Meth.
A 511, Issue 3 (2003) 341-346
H.V. Klapdor-Kleingrothaus and C. Tomei
85Kr and 39Ar Background in GENIUS",
Nucl. Instrum. Meth. A 508, Issue 3 (2003) 337-342
C. Tomei, A. Dietz,
I. Krivosheina and H.V. Klapdor-Kleingrothaus
"Searching for the Annual Modulation of Dark Matter Signal with the
, hep-ph/ 0306257,
Nucl. Instrum. Meth. A 508, Issue 3 (2003) 343 - 352
T. Kihm, V.F. Bobrakov, H.V. Klapdor-Kleingrothaus
"A digital multi-channel spectroscopy system with 100 MHz flash ADC
module for the GENIUS-TF and GENIUS projects"
Nucl. Instrum. Meth. A 498 (2002) 334-339
"Search for Dark Matter by GENIUS-TF and GENIUS"
Nucl. Phys. Proc. Suppl. 110 (2002) 58 - 60
H.V. Klapdor-Kleingrothaus, L. Baudis, A. Dietz, G. Heusser, B. Majorovits,
"GENIUS-TF: A TEST FACILITY FOR THE GENIUS PROJECT"
Nucl. Instrum. Meth. A 481 (2002) 149-159
H.V. Klapdor-Kleingrothaus, L. Baudis, A. Dietz, G. Heusser, I. Krivosheina, B. Majorovits, H. Strecker , H. Tu, S.T. Belyaev, V.I. Lebedev and coworkers "GENIUS-TF: A TEST FACILITY for the GENIUS-Project", MPI - REPORT (2000)
Please ask for the GENIUS proposal. We would be happy to send you a hardcopy.
I.Krivosheina Last Modification: 26.08.2009