6 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Instrumentation,Inst"  
Results: 1 - 6
open access

A High-resolution TOF Detector - A Possible Way to Compete with a RICH Detector

Description: Using two identical 64-pixel Burle/Photonis MCP-PMTs to provide start and stop signals, they have achieved a timing resolution of {sigma}{sub Single{_}detector} {approx} 7.2 ps for N{sub pe} {approx} 50 photoelectrons (N{sub pe}) with a laser diode providing a 1 mm spot on the MCP window. The limiting resolution achieved was {sigma}{sub Single{_}detector} {approx} 5.0 ps for N{sub pe} {approx} 180, for which they estimate the MCP-PMT contribution of {sigma}{sub MCP-PMT} {approx} 4.5 ps. The ele… more
Date: July 25, 2008
Creator: Va'vra, J; Ertley, C.; Leith, D. W. G. S.; Ratcliff, B. & Schwiening, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Studies of Helium Based Gas Mixtures Using a Small Cell Drift Chamber

Description: An international collaboration is currently working on the construction and design of an asymmetric B Factory at the Stanford Linear Accelerator Center that will be ready to collect data in 1999. The main physics motivation for such a facility is to test the description and mechanism of CP violation in the Standard Model of particle physics and provide insight into the question of why more matter than antimatter is observed in the universe today. In particular, this experiment will measure CP v… more
Date: July 7, 2006
Creator: Heise, Jaret & U., /British Columbia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A 30 ps Timing Resolution for Single Photons with Multi-pixel Burle MCP-PMT

Description: We have achieved {approx}30 psec single-photoelectron and {approx}12ps for multi-photoelectron timing resolution with a new 64 pixel Burle MCP-PMT with 10 micron microchannel holes. We have also demonstrated that this detector works in a magnetic field of 15kG, and achieved a single-photoelectron timing resolution of better than 60 psec. The study is relevant for a new focusing DIRC RICH detector for particle identification at future Colliders such as the super B-factory or ILC, and for future … more
Date: July 5, 2006
Creator: Va'vra, J.; Benitez, J.; Coleman, J.; Leith, D. W. G. S.; Mazaheri, G.; Ratcliff, B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Resolution Photon Timing with MCP-PMTs: A Comparison of a Commercial Constant Fraction Discriminator (CFD) with the ASIC-based Waveform Digitizers TARGET and WaveCatcher

Description: There is a considerable interest to develop new time-of-flight detectors using, for example, micro-channel-plate photodetectors (MCP-PMTs). The question we pose in this paper is if new waveform digitizer ASICs, such as the WaveCatcher and TARGET, operating with a sampling rate of 2-3 GSa/s can compete with 1GHz BW CFD/TDC/ADC electronics. We have performed a series of measurements with these waveform digitizers coupled to MCP-PMTs operating at low gain and with a signal equivalent to {approx}40… more
Date: July 14, 2011
Creator: Breton, D.; /Orsay, LAL; Delagnes, E.; /DAPNIA, Saclay; Maalmi, J.; /Orsay, LAL et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Why Pi And Mrad

Description: Today it is generally accepted in the ion source and accelerator communities to communicate emittance data with units of {pi} mm mrad or {pi} cm mrad. The emittance of a beam with 2 cm diameter or width and an opening angle of 200 mrad then is written as E=100 {pi} cm mrad. This example shows that {pi} has not been involved when calculating the half-axis product which is the numerical definition for the emittance. Why should we add {pi} to the dimensions? We will explain that this convention is… more
Date: July 7, 2006
Creator: Becker, R.; U., /Frankfurt & Herrmannsfeldt, W.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance of 2nd Generation BaBar Resistive Plate Chambers

Description: The BaBar detector has operated nearly 200 Resistive Plate Chambers (RPCs), constructed as part of an upgrade of the forward endcap muon detector, for the past two years. The RPCs experience widely different background and luminosity-driven singles rates (0.01-10 Hz/cm{sup 2}) depending on position within the endcap. Some regions have integrated over 0.3 C/cm{sup 2}. RPC efficiency measured with cosmic rays is high and stable. The average efficiency measured with beam is also high. However, a f… more
Date: July 12, 2005
Creator: Anulli, F.; Baldini, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Patteri, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen