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The CDF-II silicon tracking system

Description: The CDF silicon tracking system for Run II of the Fermilab Tevatron consists of eight layers arranged in cylinders spanning radii from 1.35cm to 28cm, and lengths from 90cm to nearly two meters for a total of six square meters of silicon and 722,000 readout channels. With an innermost layer (Layer 00) utilizing radiation tolerant p{sup +}-in-n silicon and low-mass readout cables between the sensors and readout electronics, double-sided vertexing layers (SVXII) designed for use with a deadtimele… more
Date: December 7, 2001
Creator: Nelson, Timothy K.
Item Type: Refine your search to only Article
open access

The CDF layer 00 detector

Description: The CDF Layer 00 detector consists of single-sided silicon sensors assembled on the beampipe, forming the innermost of eight silicon layers in the CDF detector for Run II of the Fermilab Tevatron. Radiation tolerant p-in-n silicon with 25(50) {micro}m implant(readout) pitch are mounted on a lightweight, cooled support structure and connect to electronics outside the tracking volume via long, fine-pitch cables. Layer 00 will significantly improve the impact parameter resolution and enhance the l… more
Date: December 7, 2001
Creator: Nelson, Timothy K.
Item Type: Refine your search to only Article
open access

EMSP Project Number 65015 Final Report: Three-dimensional position-sensitive germanium detectors

Description: Critical to the DOE effort to deactivate and decommission the weapons complex facilities is the characterization of contaminated equipment and building structures. This characterization includes the isotopic identification of radioactive contaminants and the spatial mapping of these deposits. The penetrating nature of the gamma rays emitted by the radioactive contaminants provides a means to accomplish this task in a passive, non-destructive and non-intrusive manner. Through conventional gamma-… more
Date: December 7, 2001
Creator: Amman, Mark & Luke, Paul N.
Item Type: Refine your search to only Report
open access

An energy efficiency guide for use in cleanroom programming

Description: This guide was developed to provide ideas for considering energy efficiency in the early stages of a cleanroom design project. Use of this guide will facilitate selection of design features that will improve energy efficiency in cleanrooms. Cleanroom owners and designers can use the guide to focus on energy intensive items in the design of a cleanroom facility.
Date: December 7, 2001
Creator: Tschudi, Bill; Xu, Tengfang & Sartor, Dale
Item Type: Refine your search to only Report
open access

Heavy-quark parton distribution functions and their uncertainties

Description: We investigate the uncertainties of the heavy-quark parton distribution functions in the variable avor number scheme. Because the charm- and bottom-quark parton distribution functions (PDFs) are constructed predominantly from the gluon PDF, it is a common practice to assume that the heavy-quark and gluon uncertainties are the same. We show that this approximation is a reasonable first guess, but it is better for bottom quarks than charm quarks. We calculate the PDF uncertainty for t-channel sin… more
Date: December 7, 2001
Creator: Sullivan, Z. & Nadolsky, P. M.
Item Type: Refine your search to only Article
open access

Localized CO2 Laser Treatment for Mitigation of 3(omega) Damage Growth in Fused Silica

Description: A technique for inhibiting the growth of laser-induced surface damage on fused silica, initiated and propagated at the 351 nm laser wavelength, has been investigated. The technique exposes the damage sites to single pulses of a CO{sub 2} laser operating at the 10.6 {micro}m wavelength at or near beam focus. This method results in a very localized treatment of the laser damage site and modifies the site such that laser damage does not propagate further. A laser damage site initiated with a singl… more
Date: December 7, 2001
Creator: Brusasco, R M; Penetrante, B M; Butler, J A & Hrubesh, L W
Item Type: Refine your search to only Article
open access

Microbiologically-Facilitated Effects on the Surface Composition of Alloy 22, A Candidate Nuclear Waste Packaging Material

Description: The effects of microbiological activities on the surface composition of Alloy 22 was investigated. Prior studies suggesting microbially-generated selective dissolution of chromium from Alloy 22 were based solely on analyzing solubilized Alloy 22 elements. These and other investigations point to the insufficiencies of analyzing solubilized (or solubilized and reprecipitated) alloying elements to discern between homogeneous/stoichiometric dissolution and selective/non-stoichiometric dissolution o… more
Date: December 7, 2001
Creator: Horn, J; Lian, T & Martin, S I
Item Type: Refine your search to only Article
open access

Operation and physics potential of Tevatron Run 2

Description: The Tevatron Run 2 has begun. The Tevatron program in the next six years offers a real opportunity to significantly advance our understanding of the fundamental properties of the universe. It is an exciting, challenging program that goes straight to the highest priorities of high energy physics worldwide. The accelerator and detectors are being commissioned and seem to be performing well. We anticipate first physics results in the summer of 2002.
Date: December 7, 2001
Creator: Womersley, John
Item Type: Refine your search to only Article
open access

Recent results from CDF and status of CDF-II

Description: The CDF detector collected during 1992-95 (Run I) a data sample of 110 pb{sup -1} p{bar p} collisions at a center of mass energy {radical}s = 1.8 TeV. A large variety of physical studies and measurements has been performed using these data. The current paper wants to review results obtained using this data sample as well as discuss the CDF-II upgrades and physical potential of the upgraded CDF Detector (CDF-II) in the Run II.
Date: December 7, 2001
Creator: Pagliarone, C.
Item Type: Refine your search to only Article
open access

Single event effects in the pixel readout chip for BTeV

Description: In future experiments the readout electronics for pixel detectors is required to be resistant to a very high radiation level. In this paper we report on irradiation tests performed on several preFPIX2 prototype pixel readout chips for the BTeV experiment exposed to a 200 MeV proton beam. The prototype chips have been implemented in commercial 0.25 {micro}m CMOS processes following radiation tolerant design rules. The results show that this ASIC design tolerates a large total radiation dose, and… more
Date: December 7, 2001
Creator: al., Gabriele Chiodini et
Item Type: Refine your search to only Article
open access

Uncertainty of Pyrometers in a Casting Facility

Description: This work has established uncertainty limits for the EUO filament pyrometers, digital pyrometers, two-color automatic pyrometers, and the standards used to certify these instruments (Table 1). If symmetrical limits are used, filament pyrometers calibrated in Production have certification uncertainties of not more than {+-}20.5 C traceable to NIST over the certification period. Uncertainties of these pyrometers were roughly {+-}14.7 C before introduction of the working standard that allowed cert… more
Date: December 7, 2001
Creator: Mee, D. K.; Elkins, J. E.; Fleenor, R. M.; Morrision, J. M.; Sherrill, M. W. & Seiber, L. E.
Item Type: Refine your search to only Report
open access

The underlying event in jet and minimum bias events at the Tevatron

Description: We describe a study of the underlying event in jet and minimum bias events using data from the CDF detector. The underlying event contribution to the jet energy has been calculated in jet events and compared to the results of two Monte Carlo programs: Herwig and Pythia. The analysis has been carried out at two different center of mass energies: {radical}s = 1800 and 630 GeV. For most observables, good agreement is obtained with at least one of the Monte Carlo programs. Neither program describes… more
Date: December 7, 2001
Creator: Tano, V.
Item Type: Refine your search to only Article
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