A detector module with highly efficient surface-alpha event rejection operated in CRESST-II Phase 2
Creators
- Strauss, R.1, 2
- Angloher, G.2
- Ferreiro, N.2
- Hauff, D.2
- Kiefer, M.2
- Petricca, F.2
- Proebst, F.2
- Reindl, F.2
- Seidel, W.2
- Stodolsky, L.2
- Tanzke, A.2
- Wuestrich, M.2
- Bento, A.3
- Bucci, C.4
- Canonica, L.4
- Gorla, P.4
- Schaeffner, K.4
- Erb, A.5, 1
- Feilitzsch, F. von1
- Guetlein, A.1
- Lanfranchi, J.C.1
- Muenster, A.1
- Potzel, W.1
- Roth, S.1
- Schoenert, S.1
- Stanger, M.1
- Ulrich, A.1
- Wawoczny, S.1
- Willers, M.1
- Zoeller, A.1
- Jochum, J.6
- Loebell, J.6
- Rottler, K.6
- Sailer, C.6
- Scholl, S.6
- Strandhagen, C.6
- Uffinger, M.6
- Usherov, I.6
- Kluck, H.7, 8
- Kraus, H.9
- Schieck, J.8
- Sivers, M. von10, 1
- 1. Technische Universitaet Muenchen, Physik-Department, Garching (Germany)
- 2. Max-Planck-Institut fuer Physik, Munich (Germany)
- 3. Universidade de Coimbra, CIUC, Departamento de Fisica, Coimbra (Portugal)
- 4. Laboratori Nazionali del Gran Sasso, INFN, Assergi (Italy)
- 5. Walther-Meissner-Institut fuer Tieftemperaturforschung, Garching (Germany)
- 6. Eberhard-Karls-Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany)
- 7. Vienna University of Technology, Atominstitut, Wien (Austria)
- 8. Institut fuer Hochenergiephysik der Oesterreichischen Akademie der Wissenschaften, Wien (Austria)
- 9. University of Oxford, Department of Physics, Oxford (United Kingdom)
- 10. University of Bern, Albert Einstein Center for Fundamental Physics, Bern (Switzerland)
Description
The cryogenic dark matter experiment CRESSTII aims at the direct detection of WIMPs via elastic scattering off nuclei in scintillating CaWO4 crystals. We present a new, highly improved, detector design installed in the current run of CRESST-II Phase 2 with an efficient active rejection of surface-alpha backgrounds. Using CaWO4 sticks instead of metal clamps to hold the target crystal, a detector housing with fully-scintillating inner surface could be realized. The presented detector (TUM40) provides an excellent threshold of ∝0.60 keV and a resolution of σ ∼ 0.090 keV (at 2.60 keV).With significantly reduced background levels, TUM40 sets stringent limits on the spin-independent WIMP nucleon scattering cross section and probes a new region of parameter space for WIMP masses below 3GeV/c2. In this paper, we discuss the novel detector design and the surface-alpha event rejection in detail. (orig.)
Availability note (English)
Available from: http://dx.doi.org/10.1140/epjc/s10052-015-3572-9Additional details
Identifiers
Publishing Information
- Journal Title
- European Physical Journal. C, Particles and Fields (Online)
- Journal Volume
- 75
- Journal Issue
- 8
- Journal Page Range
- p. 1-8
- ISSN
- 1434-6052
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 46116884
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Descriptors DEI
- ALPHA DETECTION; BETA DETECTION; CALCIUM TUNGSTATES; CRYSTALS; ENERGY RESOLUTION; GAMMA DETECTION; KEV RANGE 100-1000; KEV RANGE 10-100; MODULAR STRUCTURES; PARTICLE DISCRIMINATION; SOLID SCINTILLATION DETECTORS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CHARGED PARTICLE DETECTION; DETECTION; ENERGY RANGE; INORGANIC PHOSPHORS; KEV RANGE; MEASURING INSTRUMENTS; OXYGEN COMPOUNDS; PARTICLE IDENTIFICATION; PHOSPHORS; RADIATION DETECTION; RADIATION DETECTORS; REFRACTORY METAL COMPOUNDS; RESOLUTION; SCINTILLATION COUNTERS; TRANSITION ELEMENT COMPOUNDS; TUNGSTATES; TUNGSTEN COMPOUNDS