Systematic study of micro-discharge characteristics of ATLAS barrel silicon microstrip modules
نویسندگان
چکیده
Among the 981 silicon microstrip modules fabricated by the ATLAS SCT Japan group, 111 modules showed a micro-discharge, a rapid leakage current increase when the bias is raised, below 500V bias at least once in the series of the quality assurance testing. We have conducted a systematic study to understand the causes, including the hot spot localization using an infrared sensitive camera, and measurement of leakage current decay time. r 2007 Elsevier B.V. All rights reserved. PACS: 29.40.Gx; 29.40.Wk
منابع مشابه
Construction of the ATLAS semi-conductor tracker (SCT) barrel modules in Japan
We have developed a semi-automated assembly system and constructed 124 silicon microstrip modules so far for the ATLAS SCT barrel. This article describes the assembly procedure, evaluations of precisions and the module survey results. A precision of B2 mm is achievable with this assembly system. r 2003 Elsevier B.V. All rights reserved.
متن کاملConstruction and performance of the ATLAS silicon microstrip barrel modules
The ATLAS Semiconductor Tracker (SCT) consists of four barrel cylinders and 18 end-cap disks. This paper describes the SCT modules of the barrel region, of which more than 2000 are about to be constructed. The module design is fixed. Its design concept is given together with the electrical, thermal and mechanical specifications. The preseries production of the barrel modules is underway using m...
متن کاملTest of ATLAS SCT barrel modules with Nd:YAG laser
As a part of the quality assurance procedure of the ATLAS SCT (Semiconductor Tracker) barrel modules, the response of the microstrip detector is measured by injecting focused Nd:YAG laser at each strip. The test is sensitive to sensor originated problems and a cross check to the results obtained from the electrical tests performed with the test pulse system implemented in the readout ASICs. Com...
متن کاملBeamtest of Non-irradiated and Irradiated ATLAS SCT Microstrip Modules at KEK
-Non-irradiated and irradiated ATLAS SCT barrel and endcap modules have been beamtested with 4 GeV/c pions. Pulse shapes confirmed the peaking time of the amplifier to be 22 ns with slight deterioration in the irradiated modules. Median charges saturated around 3.8 fC both in the non-irradiated and irradiated modules. Signal/Noise ratios, using the noise estimates from the in-situ calibration, ...
متن کاملDetector modules for the ATLAS SCT endcaps
1976 double-sided detector modules are needed to equip the endcaps of the silicon microstrip tracker SCT of the ATLAS experiment at the LHC. This paper describes their design and presents results from a series of prototype
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007