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Test of feasibility of a novel high precision test of time reversal invariance

Abstract

The first results of a feasibility test of a novel high precision test of time reversal invariance are reported. The Time Reversal Invariance test at COSY (TRIC) was planned to measure the time reversal violating observable A{sub y,xz} with an accuracy of 10{sup -6} in proton-deuteron (p-d) scattering. A novel technique for measuring total cross sections is introduced and the achievable precision of this measuring technique is tested. The correlation coefficient A{sub y,y} in p-d scattering fakes a time-reversal violating effect. This work reports the feasibility test of the novel method in the measurement of A{sub y,y} in p-p scattering. The first step in the experimental design was the development of a hard real-time data acquisition system. To meet stringent latency requirements, the capabilities of Windows XP had to be augmented with a real-time subsystem. The remote control feature of the data acquisition enables users to operate it from any place via an internet connection. The data acquisition proved its reliability in several beam times without any failures. The analysis of the data showed the presence of 1/f noise which substantially limits the quality of our measurements. The origin of 1/f noise was traced and found to be the Barkhausen  More>>
Authors:
Publication Date:
Jul 01, 2007
Product Type:
Thesis/Dissertation
Report Number:
INIS-DE-0597
Resource Relation:
Other Information: TH: Diss. (Dr.rer.nat.)
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; T INVARIANCE; PROTONS; REMOTE CONTROL; RELIABILITY; PROTON BEAMS; BACKGROUND NOISE; BEAM CURRENTS; PROTON REACTIONS; DEUTERIUM TARGET; SYMMETRY BREAKING; POLARIZATION-ASYMMETRY RATIO; FEASIBILITY STUDIES; COSY STORAGE RING; POLARIMETRY; REAL TIME SYSTEMS; DATA ACQUISITION SYSTEMS; DATA ACQUISITION; MAXIMUM-LIKELIHOOD FIT; DATA PROCESSING; COMPUTER CODES; DATA ANALYSIS; FOURIER TRANSFORMATION; BEAM MONITORS; DEUTERON BEAMS; COLLIDING BEAMS; CORRELATIONS; ERRORS; SPIN ORIENTATION
OSTI ID:
21155038
Research Organizations:
Rheinische Friedrich-Wilhelm Univ., Bonn (Germany). Mathematisch-Naturwissenschaftliche Fakultaet
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
TRN: DE09F3527
Availability:
Commercial reproduction prohibited; INIS; OSTI as DE21155038
Submitting Site:
DEN
Size:
103 pages
Announcement Date:
May 21, 2009

Citation Formats

Samuel, Deepak. Test of feasibility of a novel high precision test of time reversal invariance. Germany: N. p., 2007. Web.
Samuel, Deepak. Test of feasibility of a novel high precision test of time reversal invariance. Germany.
Samuel, Deepak. 2007. "Test of feasibility of a novel high precision test of time reversal invariance." Germany.
@misc{etde_21155038,
title = {Test of feasibility of a novel high precision test of time reversal invariance}
author = {Samuel, Deepak}
abstractNote = {The first results of a feasibility test of a novel high precision test of time reversal invariance are reported. The Time Reversal Invariance test at COSY (TRIC) was planned to measure the time reversal violating observable A{sub y,xz} with an accuracy of 10{sup -6} in proton-deuteron (p-d) scattering. A novel technique for measuring total cross sections is introduced and the achievable precision of this measuring technique is tested. The correlation coefficient A{sub y,y} in p-d scattering fakes a time-reversal violating effect. This work reports the feasibility test of the novel method in the measurement of A{sub y,y} in p-p scattering. The first step in the experimental design was the development of a hard real-time data acquisition system. To meet stringent latency requirements, the capabilities of Windows XP had to be augmented with a real-time subsystem. The remote control feature of the data acquisition enables users to operate it from any place via an internet connection. The data acquisition proved its reliability in several beam times without any failures. The analysis of the data showed the presence of 1/f noise which substantially limits the quality of our measurements. The origin of 1/f noise was traced and found to be the Barkhausen noise from the ferrite core of the beam current transformer (BCT). A global weighted fitting technique based on a modified Wiener-Khinchin method was developed and used to suppress the influence of 1/f noise, which increased the error bar of the results by a factor 3. This is the only deviation from our expectations. The results are presented and discussed. (orig.)}
place = {Germany}
year = {2007}
month = {Jul}
}