Details

Autor(en) / Beteiligte

• Strauss, R.
• Angloher, G.
• Bento, A.
• Bucci, C.
• Canonica, L.
• Erb, A.
• von Feilitzsch, F.
• Ferreiro, N.
• Gorla, P.
• Gütlein, A.
• Hauff, D.
• Jochum, J.
• Kiefer, M.
• Kluck, H.
• Kraus, H.
• Lanfranchi, J.-C.
• Loebell, J.
• Münster, A.
• Petricca, F.
• Potzel, W.
• Pröbst, F.
• Reindl, F.
• Roth, S.
• Rottler, K.
• Sailer, C.
• Schäffner, K.
• Schieck, J.
• Scholl, S.
• Schönert, S.
• Seidel, W.
• von Sivers, M.
• Stanger, M.
• Stodolsky, L.
• Strandhagen, C.
• Tanzke, A.
• Uffinger, M.
• Ulrich, A.
• Usherov, I.
• Wawoczny, S.
• Willers, M.
• Wüstrich, M.
• Zöller, A.

Titel

A detector module with highly efficient surface-alpha event rejection operated in CRESST-II Phase 2

Ist Teil von

• The European physical journal. C, Particles and fields, 2015-08, Vol.75 (8), p.1-8, Article 352

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2015

Quelle

SpringerLink

Beschreibungen/Notizen

• The cryogenic dark matter experiment CRESST-II aims at the direct detection of WIMPs via elastic scattering off nuclei in scintillating CaWO 4 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 CaWO 4 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 3 GeV/c 2 . In this paper, we discuss the novel detector design and the surface-alpha event rejection in detail.