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Discrimination of Recoil Backgrounds in Scintillating Calorimeters

(2009)

Authors:

RF Lang, G Angloher, M Bauer, I Bavykina, A Bento, A Brown, C Bucci, C Ciemniak, C Coppi, G Deuter, F von Feilitzsch, D Hauff, S Henry, P Huff, J Imber, S Ingleby, C Isaila, J Jochum, M Kiefer, M Kimmerle, H Kraus, J-C Lanfranchi, M Malek, R McGowan, VB Mikhailik, E Pantic, F Petricca, S Pfister, W Potzel, F Pröbst, S Roth, K Rottler, C Sailer, K Schäffner, J Schmaler, S Scholl, W Seidel, L Stodolsky, AJB Tolhurst, I Usherov, W Westphal
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ZnWO4 scintillators for cryogenic dark matter experiments

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 600:3 (2009) 594-598

Authors:

H Kraus, FA Danevich, S Henry, VV Kobychev, VB Mikhailik, VM Mokina, SS Nagorny, OG Polischuk, VI Tretyak

Abstract:

The scintillation properties of a zinc tungstate crystal, shaped as a hexagonal prism (height 40 mm, diagonal 40 mm) were determined. An energy resolution of 10.7% for the 662 keV γ-line of 137Cs was measured with the scintillator placed in a light collection setup similar to that used by the CRESST dark matter search. The light output and decay kinetics of ZnWO4 were examined over the temperature range 7-300 K and confirmed to be competitive with those of CaWO4. The radioactive contaminations of the ZnWO4 scintillator measured in the Solotvina Underground Laboratory do not exceed 0.1-10 mBq/kg (depending on radionuclide). Our study highlights the excellent feasibility of this ZnWO4 scintillator for a cryogenic dark matter experiment. © 2008 Elsevier B.V. All rights reserved.
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Efficient VUV sensitization of Eu3+ emission by Tb3+ in potassium rare-earth double phosphate

Physica Status Solidi - Rapid Research Letters 3:1 (2009) 13-15

Authors:

VB Mikhailik, H Kraus, P Dorenbos

Abstract:

The luminescence properties of K3Tb(PO4)2 activated by Eu3+ were studied at excitation over the 120-300 nm wavelength range. It is demonstrated that Tb3+ ions, exhibiting a strong absorption band in the vacuum-ultraviolet (VUV), can provide efficient sensitisation of Eu3+ emission in this wave length range, giving rise to intense red luminescence at 150 nm excitation. A proof is given for the concept of VUV sensitisation enabling the engineering of luminescence materials with enhanced conversion efficiency of VUV radiation into visible light. © 2009 WILEY-VCH Verlag GmbH&Co. KGaA, Weinheim.
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Eureca - The future of cryogenic dark matter detection in Europe

EAS Publications Series 36 (2009) 249-255

Authors:

H Kraus, B Armengaud, M Bauer, I Bavykina, A Benoit, A Bento, J Blümer, L Bornschein, A Broniatowski, G Burghart, P Camus, A Chantelauze, M Chapellier, G Chardin, C Ciemniak, C Coppi, N Coron, O Crauste, FA Danevich, M De Jésus, P De Marcillac, E Daw, X Defay, G Deuter, J Domange, P Di Stefano, G Drexlin, L Dumoulin, K Eitel, F Von Feilitzsch, D Filosofov, P Gandit, E Garcia, J Gascon, G Gerbier, J Gironnet, H Godfrin, S Grohmann, M Gros, M Hannewald, D Hauff, F Haug, S Henry, P Huff, J Imber, S Ingleby, C Isaila, J Jochum, A Juillard, M Kiefer, M Kimmerle, H Kluck, VV Kobychev, V Kozlov, VM Kudovbenko, AV Kudryavtsev, T Lachenmaier, JC Lanfranchi, RF Lang, P Loaiza, A Lubashevsky, M Malek, S Marnieros, R McGowan, V Mikhailik, A Monfardini, XF Navick, T Niinikoski, AS Nikolaiko, L Oberauer, E Olivieri, Y Ortigoza, E Pantic, P Pari, B Paul, G Perinic, F Petricca, S Pfister, C Pobes, DV Poda, RB Podviyanuk, OG Polischuk, W Potzel, F Pröbst, J Puimedon, M Robinson, S Roth, K Rottler, S Rozov, C Sailer, A Salinas, V Sanglard, ML Sarsa, K Schäffner, S Scholl, S Scorza, A Smolnikov, W Seidel, S Semikh, M Stern

Abstract:

EURECA (European Underground Rare Event Calorimeter Array) is an astro-particle physics facility aiming to directly detect galactic dark matter. The Laboratoire Souterrain de Modane has been selected as host laboratory. The EURECA collaboration unites CRESST, EDELWEISS and the Spanish-French experiment ROSEBUD, thus concentrating and focussing effort on cryogenic detector research in Europe into a single facility. EURECA will use a target mass of up to one ton, enough to explore WIMP - nucleon scalar scattering cross sections in the region of 10-9 - 10-10 picobarn. A major advantage of EURECA is the planned use of more than just one target material (multi target experiment for WIMP identification). © EAS, EDP Sciences 2009.
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Searching for dark matter with CRESST

Proceedings of the 5th Patras Workshop on Axions, WIMPs and WISPs, PATRAS 2009 (2009) 11-15

Authors:

H Kraus, G Angloher, M Bauer, I Bavykina, A Bento, A Brown, C Bucci, C Ciemniak, C Coppi, G Deuter, F Von Feilitzsch, D Hauff, S Henry, P Huff, J Imber, S Ingleby, C Isaila, J Jochum, M Kiefer, M Kimmerle, JC Lanfranchi, RF Lang, B Majorovits, M Malek, R McGowan, VB Mikhailik, E Pantic, F Petricca, S Pfister, W Potzel, F Pröbst, S Roth, K Rottler, C Sailer, K Schäffner, J Schmaler, S Scholl, W Seidel, M Von Sivers, L Stodolsky, C Strandhagen, R Strauss, AJB Tolhurst, I Usherov, W Westphal

Abstract:

The CRESST II experiment is a dark matter search using cryogenic phonon-scintillation detectors, aiming to detect WIMP dark matter particle interactions. The detector consists of individual, modular and scintillating (CaWO4or ZnWO4) target crystals, each equipped with a phonon sensor for precise determination of the energy deposited in the crystals. Each module is further equipped with a separate cryogenic scintillation light detector, allowing event-by-event background discrimination. An extended commissioning run during 2007 has set an upper limit on theWIMP-nucleon scattering cross section. Attention is currently focussed on the interpretation of a few remaining nuclear recoils candidate events.
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