Results on the DELPHI microvertex alignment from a precise 3-D mapping

Andreazza, A.; Biffi, P.; Meroni, C.; Stocchi, A.

doi:10.1016/0168-9002(92)90192-7

Cited by 4 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The internal alignment of the Silicon Tracker is based on a mechanical survey, during which the components and the whole structure were measured by optical or mechanical means. The survey was done in two steps [7]. First a measurement of each individual module was done to fix the position of a sensor within a module to a level of 1-2 µm.…”

Section: Internal Vd Alignmentmentioning

confidence: 99%

The DELPHI Silicon Tracker in the global pattern recognition

Elsing

2000

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

ALEPH and DELPHI were the first experiments operating a silicon vertex detector at LEP. During the past 10 years of data taking the DELPHI Silicon Tracker was upgraded three times to follow the different tracking requirements for LEP 1 and LEP 2 as well as to improve the tracking performance. Several steps in the development of the pattern recognition software were done in order to understand and fully exploit the silicon tracker information. This article gives an overview of the final algorithms and concepts of the track reconstruction using the Silicon Tracker in DELPHI.Comment: Talk given at the 8th International Workshop on Vertex Detectors, Vertex'99, Texel, Nederland

show abstract

Section: Internal Vd Alignmentmentioning

confidence: 99%

The DELPHI Silicon Tracker in the global pattern recognition

Elsing

2000

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…The survey stage [28] is di erent for the di erent detector components and it requires both optical and mechanical measurements. Barrel and ministrip modules are individually measured by a camera 11 mounted on the same 3D machine 12 used for the mechanical survey.…”

Section: Survey Of the Silicon Trackermentioning

confidence: 99%

The DELPHI Silicon Tracker at LEP2

Chochula

Rosinský

Andreazza

et al. 1998

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

Yves was one of the driving forces during the design and construction of the Silicon Tracker. He was killed in an avalanche on the Pointe Percee in January 1996, a victim of his passion for the high mountains. We would like to dedicate this paper to his memory. AbstractThe DELPHI Silicon Tracker, an ensemble of microstrips, ministrips and pixels, was completed in 1997 and has accumulated over 70 pb 1 of high energy data. The Tracker is optimised for the LEP2 physics programme. It consists of a silicon microstrip barrel and endcaps with layers of silicon pixel and ministrip detectors. In the barrel part, three dimensional b tagging information is available down to a polar angle of 25 . Impact parameter resolutions have been measured of 28 m 71= (p sin 3 2 ) m i n R and 34 m 69=p m i n Rz, where p is the track momentum in GeV=c. The amount of material has been kept low with the use of double-sided detectors, double-metal readout, and light mechanics. The pixels have dimensions of 330 330 m 2 and the ministrips have a readout pitch of 200 m. The forward part of the detector shows average e ciencies of more than 96%, has signal-to-noise ratios of up to 40 in the ministrips, and noise levels at the level of less than one part per million in the pixels. Measurements of space points with low backgrounds are provided, leading to a vastly improved tracking e ciency for the region with polar angle less than 25 .3

show abstract