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Klapdor‐Kleingrothaus, H. V.

doi:10.1023/a:1025653108273

Cited by 11 publications

(20 citation statements)

References 34 publications

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“…The first four naked detectors (in total 10 kg) were installed on May 5, 2003 (GENIUS-TF-I). This has been reported in CERN Courier 13 and in. 14 In 14 first energy calibration spectra are shown which demonstrate the (initial) good energy resolution obtained.…”

Section: Introductionsupporting

confidence: 63%

“…The high-purity liquid nitrogen used, is produced by the BOREXINO nitrogen plant, which has been extended for increase of the production capacity to be able to provide enough nitrogen also for GENIUS-TF (see 11,14 ).…”

Section: Genius-tf-ii In Gran Sasso Italymentioning

confidence: 99%

“…A detailed description of the GENIUS-TF project is given in. 12,14 The GENIUS-Test-Facility has been approved by the Gran Sasso Scientific Committee in March 2001.…”

Section: Introductionmentioning

confidence: 99%

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DREAMS AND REALITY OF USING NAKED Ge DETECTORS IN LIQUID NITROGEN, STATUS (LONG-TERM STABILITY) OF GENIUS-TF

Krivosheina¹,

Klapdor‐Kleingrothaus²

2008

Dark Matter in Astroparticle and Particle Physics

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GENIUS-TF-II is a setup of six naked high purity Ge detectors (15 kg) in liquid nitrogen in Gran Sasso. It has been installed in October, 2004-after the first four naked Ge detectors had been installed on May 5, 2003 (GENIUS-TF-I). The GENIUS-Test-Facility (GENIUS-TF) is the first and up to now only setup ever testing the novel technique aiming at extreme background reduction in search for rare decays in particular underground. The goal of GENIUS-TF was to test some key operational parameters of the full GENIUS project in 1997. 1-6 Simultaneous physical goal was to search for the annual modulation of the Dark Matter signal. 12,25 After operation of GENIUS-TF over three years with finally six naked Ge detectors (15 kg) in liquid nitrogen in Gran Sasso we realize serious problems for realization of a full-size GENIUS-like experiment: 1. Background from 222 Rn diffusing into the setup, on a level far beyond the expectation. 2. Limited long-term stability of naked detectors in liquid nitrogen as result of increasing leakage current. None of the six detectors is running after three years with the nominal leakage current. Three of the six detectors do not work any more at all. The results of our three years of investigation of the long-term stability casts serious doubt on the possibility to perform a full GENIUS projector its copies GERDA or CAMEO/GEM.

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Section: Introductionsupporting

confidence: 63%

Section: Genius-tf-ii In Gran Sasso Italymentioning

confidence: 99%

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DREAMS AND REALITY OF USING NAKED Ge DETECTORS IN LIQUID NITROGEN, STATUS (LONG-TERM STABILITY) OF GENIUS-TF

Krivosheina¹,

Klapdor‐Kleingrothaus²

2008

Dark Matter in Astroparticle and Particle Physics

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“…1-upper part). This has been reported in Cern Courier and [6]. The data acquisition system we developed in 2002 for GENIUS-TF and GENIUS is decribed in detail in [7].…”

Section: The Genius-tf-ii Setupmentioning

confidence: 99%

“…A small scale version of GENIUS, the GENIUS-Test-Facility has the goal to confirm the claimed evidence for WIMP dark matter from the DAMA experiment [9]. A detailed description of the GENIUS-TF project is given in [5,6]. In Sect.…”

Section: Introductionmentioning

confidence: 99%

The GENIUS-Test-Facility and the HDMS Detector in GRAN SASSO

Klapdor‐Kleingrothaus

Krivosheina

Dark Matter in Astro- And Particle Physics

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After the installation of the first four naked high purity Germanium detectors in liquid nitrogen in the GRAN SASSO Underground Laboratory in the GENIUS-Test-Facility (GENIUS-TF-I) on May 5, 2003, an improved setup GENIUS-TF-II with now six detectors (15 kg), has been installed on October 14, 2004. This is the only setup existing worldwide until now (April 2005) which applies this novel technique aiming at extreme background reduction in search for rare decays underground. The GENIUS-TF experiment, aims to search for the annual modulation of the Dark Matter signal. The HDMS (Heidelberg Dark Matter Search experiment) is the only experiment worldwide, operating an enriched 73 Ge detector and is looking for spin-dependent WIMP-neutron interactions. Results for the measurement Febr. 2001-July 2003 are presented. They improve the best existing present limits for low WIMP masses.

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