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S.R Golwala,
R Abusaidi, D.S Akerib,
P.D Barnes,
D.A Bauer,
A Bolozdynya,
P Brink,
B Cabrera,
D.O Caldwell,
J.P Castle, [......],
T Saab,
B Sadoulet,
R.W Schnee,
P Shestople,
T Shutt,
A Smith,
A.H Sonnenschein,
A.L Spadafora,
S Yellin,
B.A Young
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ABSTRACT: The Cryogenic Dark Matter Search (CDMS) employs massive ionization- and phonon-mediated detectors to search for WIMPs via their elastic scattering interactions with nuclei while discriminating against interactions by other background particles. Limits on the WIMP-nucleon scattering cross-section, based on 3.1 kg d of exposure, exclude new parameter space in the 10–30 GeV WIMP mass region and also a portion of the region allowed by the DAMA annual modulation search (Bernabei, Phys. Lett. 450 (1999) 448).
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
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R.W Schnee, D.S Akerib,
P.D.Barnes Jr,
D.A Bauer,
P.L Brink,
B Cabrera,
D.O Caldwell,
R.M Clarke,
P Colling,
M.B Crisler, [......],
T.A Perera,
R.R Ross,
B Sadoulet,
T Shutt,
A Smith,
A.H Sonnenschein,
A.L Spadafora,
W.K Stockwell,
S Yellin,
B.A Young
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ABSTRACT: The Cryogenic Dark Matter Search experiment uses cooled germanium and silicon detectors for a direct search for weakly interacting massive particles in our Galaxy. The novel detectors allow a high degree of background rejection by discriminating between electron and nuclear recoils through the simultaneous measurement of the energy deposited in phonons and ionization. Exposures on the order of one kilogram-day from initial runs of our experiment yield (preliminary) upper limits on the WIMP-nucleon cross section that are comparable to much longer runs of other experiments. Current and future runs promise significant improvement, primarily due to improved detectors and reduced surface-electron backgrounds.
Physics Reports.
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ABSTRACT: A new data acquisition system has been installed to readout the CLEO II detector at the Cornell Electron Storage Ring (CESR). This involves digitizing and collecting data from 40 front-end detector crates, sparsifying to remove unwanted information, formatting the fragments into complete events, and distributing these to a workstation cluster. The VME-based system has a low front-end deadtime and a high data throughput, allowing us to take advantage of increases in CESR luminosity and to broaden the scope of our physics program by loosening online event-selection criteria. The modular system is easily expanded to accommodate additional detector subsystems.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
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T Shutt, D.S Akerib,
P.D Barnes,
A Cummings,
A Da Silva,
R Diaz,
J Emes,
S.R Golwala,
E.E Haller,
K Itoh, [......],
F Quiennec,
R.R Ross,
B Sadoulet,
D Seitz,
G Smith,
W Stockwell,
T Trumbull,
R Therrien,
S White,
B.A Young
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ABSTRACT: We report on recent results with a 62 g Ge cryogenic detector that combines simultaneous ionization and phonon measurements to allow rejection of radioactive background in a dark matter experiment. This detector has FWHM baseline resolutions of 500 eV in phonons and 1200 eV in ionization. A simplified charge collection scheme has been employed to improve the efficiency of the background rejection. Based on the success of this detector we are currently building six 165 g detectors as part of the CDMS experiment.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
