| Autor: |
L. Passamonti, L. Trasatti, F. L. Fabbri, V. Lucherini, C. Guaraldo, N. Qaisar, A. Ghezzo, P. Locchi, M. Giardoni, S. Sarwar, V. Serdyouk, J. Lu, E. Pace, A. Zia, Stefano Bianco, Luisa Benussi, A. Mecozzi, M. Bertani, A. Volkov, Paola Gianotti, Armando Lanaro, A. Ricciardi |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 419:648-653 |
| ISSN: |
0168-9002 |
| Popis: |
An array of 2424 2.6 m-long, 15 mm-diameter mylar straw tubes, arranged in two axial and four stereo layers, has been assembled. The array covers a cylindrical tracking surface of 18 m 2 and provides coordinate measurement in the drift direction and along the wire. A correction of the systematic effects which are introduced by gravitational sag and electrostatics, thus dominating the detector performance especially with long straws, allows to determine wire position from drift-time distribution. The correction has been applied to reach a space resolution of 40 μm with DME, 100 μm with Ar+C 2 H 6 , and 100–200 μm with CO 2 . Such a resolution is the best ever obtained for straws of these dimensions. A study of the gas leakage for the straw system has been performed, and results are reported. The array is being commissioned as a subdetector of the FINUDA spectrometer, and tracking performances are being studied with cosmic rays. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect