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Title: Time-of-flight measurements

Abstract

Time of flight (TOF) measurements are used in high energy particle physics experiments to: (1) distinguish background from events and (2) identify particle types. An example of background separation is shown. These data come from a coincidence electro-production experiment performed at SLAC. The reaction being studied was e + p ..-->.. e' + p' + X where the e(p) stand for an initial and detected electron (proton) and X is a produced but undetected final state with a mass in the rho meson region. The relative time between the detection of an electron and a proton in two of the spectrometers in End Station A is plotted. Data for two different kinematic settings taken in the experiment are shown. The time resolution has been partially corrected for the various flight paths through the instruments and the difference in time resolutions between the two settings results mainly from the incompleteness of this correction. The signal height above the background depends on the time resolution, ..delta.. tau. The chance background is proportional to the product of the electron counting rate, the proton counting rate, and ..delta.. tau. Smaller ..delta.. tau means that higher electron and proton counting rates may be tolerated andmore » result in a similar signal-to-noise ratio.« less

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, CA (USA)
OSTI Identifier:
6797403
Alternate Identifier(s):
OSTI ID: 6797403
Report Number(s):
SLAC-PUB-2620
TRN: 81-001140
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; PARTICLE IDENTIFICATION; TIME-OF-FLIGHT METHOD; PERFORMANCE; RESOLUTION; REVIEWS; SCINTILLATION COUNTERS; SPARK COUNTERS; DOCUMENT TYPES; MEASURING INSTRUMENTS; RADIATION DETECTORS 440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation

Citation Formats

Atwood, W.B. Time-of-flight measurements. United States: N. p., 1980. Web. doi:10.2172/6797403.
Atwood, W.B. Time-of-flight measurements. United States. doi:10.2172/6797403.
Atwood, W.B. Wed . "Time-of-flight measurements". United States. doi:10.2172/6797403. https://www.osti.gov/servlets/purl/6797403.
@article{osti_6797403,
title = {Time-of-flight measurements},
author = {Atwood, W.B.},
abstractNote = {Time of flight (TOF) measurements are used in high energy particle physics experiments to: (1) distinguish background from events and (2) identify particle types. An example of background separation is shown. These data come from a coincidence electro-production experiment performed at SLAC. The reaction being studied was e + p ..-->.. e' + p' + X where the e(p) stand for an initial and detected electron (proton) and X is a produced but undetected final state with a mass in the rho meson region. The relative time between the detection of an electron and a proton in two of the spectrometers in End Station A is plotted. Data for two different kinematic settings taken in the experiment are shown. The time resolution has been partially corrected for the various flight paths through the instruments and the difference in time resolutions between the two settings results mainly from the incompleteness of this correction. The signal height above the background depends on the time resolution, ..delta.. tau. The chance background is proportional to the product of the electron counting rate, the proton counting rate, and ..delta.. tau. Smaller ..delta.. tau means that higher electron and proton counting rates may be tolerated and result in a similar signal-to-noise ratio.},
doi = {10.2172/6797403},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1980},
month = {Wed Oct 01 00:00:00 EDT 1980}
}

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