Studies of dynamics of electron clouds in STAR silicon drift detectors STAR-SVT Collaboration

R. Bellwied, R. Beuttenmuller, N. Brandon, H. Caines, W. Chen, D. DiMassimo, H. Dyke, J. R. Hall, D. Hardtke, G. W. Hoffmann, T. J. Humanic, A. I. Kotova, I. V. Kotov, H. W. Kraner, Z. Li, D. Lynn, P. Middelkamp, G. Ott, S. U. Pandey, C. PruneauV. L. Rykov, J. Schambach, J. Sedlmeir, E. Sugarbaker, J. Takahashi, W. K. Wilson

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The dynamics of electrons generated in silicon drift detectors was studied using an IR LED. Electrons were generated at different drift distances. In this way, the evolution of the cloud as a function of drift time was measured. Two methods were used to measure the cloud size. The method of cumulative functions was used to extract the electron cloud profiles. Another method obtains the cloud width from measurements of the charge collected on a single anode as a function of coordinate of the light spot. The evolution of the electron cloud width with drift time is compared with theoretical calculations. Experimental results agreed with theoretical expectations.

Original languageEnglish
Pages (from-to)507-512
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume439
Issue number2-3
DOIs
StatePublished - Jan 11 2000
Externally publishedYes

Funding

We thank D. Fiske for his help in data analysis. This work was supported in part by the US Department of Energy grants DE-AC02-76CH00016 and DE-FG03-94ER-40485, NSF grant PHY-9511850, STAR R&D funds and Robert A. Welch Foundation.

Keywords

  • Drift detectors
  • Ionizing particles

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