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 language | English |
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Pages (from-to) | 507-512 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 439 |
Issue number | 2-3 |
DOIs | |
State | Published - Jan 11 2000 |
Externally published | Yes |
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