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CRESST

Published online by Cambridge University Press:  30 May 2009

G. Angloher
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
M. Bauer
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
I. Bavykina
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
A. Bento
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
A. Brown
Affiliation:
Department of Physics, University of Oxford, Oxford OX1 3RH, UK
C. Bucci
Affiliation:
INFN, Laboratori Nazionali del Gran Sasso, 67010 Assergi, Italy
C. Ciemniak
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
C. Coppi
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
G. Deuter
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
F. von Feilitzsch
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
D. Hauff
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
S. Henry
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
P. Huff
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
J. Imber
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
S. Ingleby
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
C. Isaila
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
J. Jochum
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
M. Kiefer
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
M. Kimmerle
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
H. Kraus
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
J.-C. Lanfranchi
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
R.F. Lang
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
B. Majorovits
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
M. Malek
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
R. McGowan
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
V.B. Mikhailik
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
E. Pantic
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
F. Petricca
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
S. Pfister
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
W. Potzel
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
F. Pröbst
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
W. Rau
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany Now at: Department of Physics, Queen's University, Ontario K7L 3N6, Canada
S. Roth
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany
K. Rottler
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
C. Sailer
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
K. Schäffner
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
J. Schmaler
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
S. Scholl
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
W. Seidel
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
L. Stodolsky
Affiliation:
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
A.J.B. Tolhurst
Affiliation:
On leave from: Departamento de Fisica, Universidade de Coimbra, 3004 516 Coimbra, Portugal
I. Usherov
Affiliation:
Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
W. Westphal
Affiliation:
Physik-Department E15, Technische Universität München, 85747 Garching, Germany Deceased
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Abstract

The CRESST-II direct Dark Matter search is located in the Gran Sasso underground laboratories, Italy. CaWO4 crystals are used as scintillating targets for WIMP (weakly interacting massive particle) interactions. They are operated as cryogenic calorimeters in combination with a second cryogenic detector used to measure the scintillation light produced in the target crystal. For each particle interaction, the combination of phonon and light signals provides an event by event discrimination which allows to distinguish known particles (alphas, betas, gammas, neutrons) from the expected signal of WIMPs. A major upgrade of the setup comprises modifications of the shielding, installation of a muon-veto, and new read out electronics, as well as a new detector-support structure to accommodate up to 33 detector modules, i.e. 10 kg of target mass. The experiment was thereafter successfully commissioned in 2007. Data obtained during this commissioning phase from 2 detector modules are presented here. Combining the data collected with these two detector modules with data from one single module obtained during the CRESST-I phase, the experiment could already place a limit of ~6 × 10-7 pb for the spin independent WIMP-nucleon scattering cross section at a WIMP mass of ~60 GeV/c2.

Type
Research Article
Copyright
© EAS, EDP Sciences, 2009

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References

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