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Title: Radiation experience with the CDF silicon detectors

Abstract

The silicon detectors of the CDF experiment at the Tevatron collider are operated in a harsh radiation environment. The lifetime of the silicon detectors is limited by radiation damage, and beam-related incidents are an additional risk. This article describes the impact of beam-related incidents on detector operation and the effects of radiation damage on electronics noise and the silicon sensors. From measurements of the depletion voltage as a function of the integrated luminosity, estimates of the silicon detector lifetime are derived.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
892261
Report Number(s):
FERMILAB-CONF-05-606-E
TRN: US0701364
DOE Contract Number:
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Journal Name: Nucl.Instrum.Meth.A569:65-68,2006; Conference: Presented at VERTEX 2005, Chuzenji Lake, Nikko, Japan, 7-11 Nov 2005
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; LIFETIME; LUMINOSITY; RADIATIONS; SILICON; Instrumentation

Citation Formats

Husemann, Ulrich, and /Rochester U. Radiation experience with the CDF silicon detectors. United States: N. p., 2005. Web.
Husemann, Ulrich, & /Rochester U. Radiation experience with the CDF silicon detectors. United States.
Husemann, Ulrich, and /Rochester U. Tue . "Radiation experience with the CDF silicon detectors". United States. doi:. https://www.osti.gov/servlets/purl/892261.
@article{osti_892261,
title = {Radiation experience with the CDF silicon detectors},
author = {Husemann, Ulrich and /Rochester U.},
abstractNote = {The silicon detectors of the CDF experiment at the Tevatron collider are operated in a harsh radiation environment. The lifetime of the silicon detectors is limited by radiation damage, and beam-related incidents are an additional risk. This article describes the impact of beam-related incidents on detector operation and the effects of radiation damage on electronics noise and the silicon sensors. From measurements of the depletion voltage as a function of the integrated luminosity, estimates of the silicon detector lifetime are derived.},
doi = {},
journal = {Nucl.Instrum.Meth.A569:65-68,2006},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 2005},
month = {Tue Nov 01 00:00:00 EST 2005}
}

Conference:
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  • We report on initial experience with the CDF Layer 00 Detector. Layer 00 is an innovative, low-mass, silicon detector installed in CDF during the upgrade for Run 2A of the Tevatron. Noise pickup present during operation at CDF is discussed. An event-by-event pedestal correction implemented by CDF is presented. This off-line solution prevents L00 from being used in the current incarnation of the on-line displaced track trigger. Preliminary performance of Layer 00 is described.
  • The Dense Optical Interface Module (DOIM) is a byte-wide optical link developed for the Run II upgrade of the CDF silicon tracking system [1]. The module consists of a transmitter with a laser-diode array for conversion of digitized detector signals to light outputs, a 22 m optical fiber ribbon cable for light transmission, and a receiver converting the light pulses back to electrical signals. We report on the design feature, characteristics, and radiation tolerance.
  • The CDF Run II Silicon Detector is the largest operating silicon detector in High Energy Physics. Its 722,000 channels spread over 7 m{sup 2} of silicon micro-strip sensors allow precision tracking and vertexing. The CDF silicon detector played a critical role in the discovery of B{sub s} mixing and is used extensively for the current Higgs Boson searches. Over the last 7 years, the detector efficiency has remained stable at 95% after the Run II commissioning period. The infrastructure (cooling, power supplies) problems dealt with are discussed.
  • A substantial portion of the Run IIa silicon detectors of the CDF experiment will not perform adequately for the duration of Run IIb (15 fb{sup -1}) because of radiation damage. The Silicon Vertex Detector (SVX-II) and Layer 00 will be fully replaced at the end of Run IIa. The Run IIb silicon tracker has a baseline design that safely achieves the required radiation tolerance by using single sided sensors that are actively cooled. The new Run IIb castellated layout contains more silicon surface area and has a more uniform radial distribution. It minimizes the number of hybrid and sensor varietiesmore » providing quick construction and assembly. The total mass in the tracking volume is reduced by eliminating unnecessary the passive material from the CDF volume.« less
  • In 2001, an upgraded silicon detector system was installed in the CDF II experiment on the Tevatron at Fermilab. The complete system consists of three silicon micro-strip detectors: SVX II with five layers for precision tracking, Layer 00 with one beampipe-mounted layer for vertexing, and two Intermediate Silicon Layers located between SVX II and the main CDF II tracking chamber. Currently all detectors in the system are operating at or near design levels. The performance of the combined silicon system is excellent in the context of CDF tracking algorithms,and the first useful physics results from the innermost Layer 00 detectormore » have been recently documented. Operational and monitoring efforts have also been strengthened to maintain silicon efficiency through the end of Run 2 at the Tevatron.« less