W. A. Wenzel
Lawrence Berkeley National Laboratory
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Featured researches published by W. A. Wenzel.
Nuclear Instruments and Methods in Physics Research | 1983
H. Aihara; M. Alston-Garnjost; D. H. Badtke; J. A. Bakken; A. Barbaro-Galtieri; A.V. Barnes; B. A. Barnett; Barry Blumenfeld; A. D. Bross; C. Buchanan; W. C. Carithers; O. Chamberlain; J. Chiba; C.Y. Chien; A. R. Clark; O. I. Dahl; C. T. Day; P. Delpierre; K. A. Derby; P. H. Eberhard; D. L. Fancher; H. Fujii; B. Gabioud; J. W. Gary; W. Gorn; N. J. Hadley; J. M. Hauptman; B. Heck; H. J. Hilke; W. Hofmann
Abstract A Geiger-mode electromagnetic shower calorimeter has been constructed for PEP-4. Six trapezoidal modules cover 75% of 4 π solid angle in a hexagonal array. Each module contains 40 sense wire planes between 0.25 radiation-length thick lead-laminates, and is divided electrically into submodules of 27 and 13 layers. Half-degree wide hodoscopic channels in projective geometry provide excellent spatial resolution. In each gap three stereo views using the sense wires as well as strips on both cathodes at ±60° to the wires provide good shower reconstruction capabilities in multi-track jet events. Calibration and data analysis procedures are outlined. The performance of the calorimeter in the measurement of Bhabha events and the reconstruction of π 0 s in jet events is in excellent agreement with Monte Carlo simulations. The π 0 mass resolution is MeV (rms).
Nuclear Physics B - Proceedings Supplements | 2001
I. Adam; R. Aleksan; D. Aston; M. Benkebil; D. Bernard; G. R. Bonneaud; F. Brochard; D. N. Brown; P. Bourgeois; J. Chauveau; J. Cohen-Tanugi; M. R. Convery; G. De Domenico; A. de Lesquen; S. Emery; S. Ferrag; A. Gaidot; T.L. Geld; G. Hamel de Monchenault; C. Hast; A. Hoecker; R. W. Kadel; J. Kadyk; H. M. Lacker; G. W. London; A. Lu; A. M. Lutz; G. Lynch; G. Mancinelli; F. Martinez-Vidal
Abstract The Ba B ar DIRC runs extremely well at design luminosities, providing excellent PID in both ring and veto modes. Machine backgrounds expected as PEP-II goes to much higher luminosities (10 34 cm 2 ·s −1 or more) in the next 5 years will require faster data acquisition electronics and further shielding of the SOB from low energy machine produced gamma rays.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2008
Tae Sung Kim; M. Freytsis; J. Button-Shafer; J. Kadyk; S.E. Vahsen; W. A. Wenzel
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