Factors affecting the performance of detectors that use secondary electron emission from a thin foil to determine ion impact position

被引：23

作者：

Shapira, D ^{[1
]}

Lewis, TA

Hulett, LD

Ciao, Z

机构：

[1] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37830 USA

[2] Oak Ridge Natl Lab, Div Instrumentat & Controls, Oak Ridge, TN 37830 USA

[3] Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37830 USA

[4] Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA

[5] Univ Tennessee, Dept Mech Engn, Knoxville, TN USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2000年 / 449卷 / 1-2期

关键词：

timing and position measurement; ions and nuclei; electron emission from surfaces; electron acceleration and detection; limits to time and position resolution; micro channel plate detectors;

D O I：

10.1016/S0168-9002(99)01444-8

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The factors affecting the performance of a Position-Sensitive Timing Detector (PSTD), based on the detection of secondary electrons ejected from a thin foil by the passing ion, were investigated. Different contributions to the observed (generally poor) position resolution were investigated. The effects of multiple scattering in the foil were determined first. We then measured the contribution of the position-sensitive detector and signal-handling electronics. Finally, the effect of electron transport, from the point of emission at the foil surface to the micro-channel plate detector (MCP) surface, was measured and evaluated. Our measurements, as well as a simulation of the electron transport, lead us to conclude that for detectors with foil-to-MCP distance greater than or equal to 5 cm, electron transport limits the devices currently in use to resolution worse than 2 mm (FWHM). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：396 / 407

页数：12

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