%0 Journal Article %1 2009AngloherComissioningRun %A Angloher, G. %A Bauer, M. %A Bavykina, I. %A Bento, A. %A Brown, A. %A Bucci, C. %A Ciemniak, C. %A Coppi, C. %A Deuter, G. %A von Feilitzsch, F. %A Hauff, D. %A Henry, S. %A Huff, P. %A Imber, J. %A Ingleby, S. %A Isaila, C. %A Jochum, J. %A Kiefer, M. %A Kimmerle, M. %A Kraus, H. %A Lanfranchi, J.-C. %A Lang, R.F. %A Majorovits, B. %A Malek, M. %A McGowan, R. %A Mikhailik, V.B. %A Pantic, E. %A Petricca, F. %A Pfister, S. %A Potzel, W. %A Pröbst, F. %A Rau, W. %A Roth, S. %A Rottler, K. %A Sailer, C. %A Schäffner, K. %A Schmaler, J. %A Scholl, S. %A Seidel, W. %A Stodolsky, L. %A Tolhurst, A.J.B. %A Usherov, I. %A Westphal, W. %D 2009 %J Astroparticle Physics %K cresst darkmatter %N 4 %P 270 - 276 %R http://dx.doi.org/10.1016/j.astropartphys.2009.02.007 %T Commissioning run of the CRESST-II dark matter search %U http://www.sciencedirect.com/science/article/pii/S0927650509000358 %V 31 %X The \CRESST\ cryogenic direct dark matter search at Gran Sasso, searching for \WIMPs\ via nuclear recoil, has been upgraded to CRESST-II by several changes and improvements. The upgrade includes a new detector support structure capable of accommodating 33 modules, the associated multichannel readout with 66 \SQUID\ channels, a neutron shield, a calibration source lift, and the installation of a muon veto. We present the results of a commissioning run carried out in 2007. The basic element of CRESST-II is a detector module consisting of a large ( ∼ 300 g ) CaWO 4 crystal and a very sensitive smaller ( ∼ 2 g ) light detector to detect the scintillation light from the CaWO 4 . The large crystal gives an accurate total energy measurement. The light detector permits a determination of the light yield for an event, allowing an effective separation of nuclear recoils from electron–photon backgrounds. Furthermore, information from light-quenching factor studies allows the definition of a region of the energy-light yield plane which corresponds to tungsten recoils. A neutron test is reported which supports the principle of using the light yield to identify the recoiling nucleus. Data obtained with two detector modules for a total exposure of 48 kg-days are presented. Judging by the rate of events in the “all nuclear recoils” acceptance region the apparatus shows a factor ∼10 improvement with respect to previous results, which we attribute principally to the presence of the neutron shield. In the “tungsten recoils” acceptance region three events are found, corresponding to a rate of 0.063 per kg-day. Standard assumptions on the dark matter flux, coherent or spin independent interactions, then yield a limit for WIMP-nucleon scattering of 4.8 × 10 - 7 pb , at M \WIMP\ ∼ 50 GeV .

@article{2009AngloherComissioningRun, abstract = {The \{CRESST\} cryogenic direct dark matter search at Gran Sasso, searching for \{WIMPs\} via nuclear recoil, has been upgraded to CRESST-II by several changes and improvements. The upgrade includes a new detector support structure capable of accommodating 33 modules, the associated multichannel readout with 66 \{SQUID\} channels, a neutron shield, a calibration source lift, and the installation of a muon veto. We present the results of a commissioning run carried out in 2007. The basic element of CRESST-II is a detector module consisting of a large ( ∼ 300 g ) CaWO 4 crystal and a very sensitive smaller ( ∼ 2 g ) light detector to detect the scintillation light from the CaWO 4 . The large crystal gives an accurate total energy measurement. The light detector permits a determination of the light yield for an event, allowing an effective separation of nuclear recoils from electron–photon backgrounds. Furthermore, information from light-quenching factor studies allows the definition of a region of the energy-light yield plane which corresponds to tungsten recoils. A neutron test is reported which supports the principle of using the light yield to identify the recoiling nucleus. Data obtained with two detector modules for a total exposure of 48 kg-days are presented. Judging by the rate of events in the “all nuclear recoils” acceptance region the apparatus shows a factor ∼10 improvement with respect to previous results, which we attribute principally to the presence of the neutron shield. In the “tungsten recoils” acceptance region three events are found, corresponding to a rate of 0.063 per kg-day. Standard assumptions on the dark matter flux, coherent or spin independent interactions, then yield a limit for WIMP-nucleon scattering of 4.8 × 10 - 7 pb , at M \{WIMP\} ∼ 50 GeV . }, added-at = {2016-03-11T17:40:42.000+0100}, author = {Angloher, G. and Bauer, M. and Bavykina, I. and Bento, A. and Brown, A. and Bucci, C. and Ciemniak, C. and Coppi, C. and Deuter, G. and von Feilitzsch, F. and Hauff, D. and Henry, S. and Huff, P. and Imber, J. and Ingleby, S. and Isaila, C. and Jochum, J. and Kiefer, M. and Kimmerle, M. and Kraus, H. and Lanfranchi, J.-C. and Lang, R.F. and Majorovits, B. and Malek, M. and McGowan, R. and Mikhailik, V.B. and Pantic, E. and Petricca, F. and Pfister, S. and Potzel, W. and Pröbst, F. and Rau, W. and Roth, S. and Rottler, K. and Sailer, C. and Schäffner, K. and Schmaler, J. and Scholl, S. and Seidel, W. and Stodolsky, L. and Tolhurst, A.J.B. and Usherov, I. and Westphal, W.}, biburl = {https://www.bibsonomy.org/bibtex/2465a177d1c7314ec6a763925157b346b/strandhagen}, doi = {http://dx.doi.org/10.1016/j.astropartphys.2009.02.007}, interhash = {36699c2ed33b6b13bf4bad4fb7cdcba6}, intrahash = {465a177d1c7314ec6a763925157b346b}, issn = {0927-6505}, journal = {Astroparticle Physics }, keywords = {cresst darkmatter}, number = 4, pages = {270 - 276}, timestamp = {2016-03-11T17:40:42.000+0100}, title = {Commissioning run of the CRESST-II dark matter search }, url = {http://www.sciencedirect.com/science/article/pii/S0927650509000358}, volume = 31, year = 2009 }