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Studies on the intercalibration as well as construction and test of a gas-flow monitoring facility of the SAPHIR shower detector; Untersuchungen zur Interkalibration sowie Aufbau und Test einer Gasflussueberwachungsanlage des SAPHIR-Schauerdetektors

Abstract

At the SAPHIR detector a large electromagnetic calorimeter has been built to detect photons in forward direction. This photon detection system consists of 98 identical gas sampling calorimeters with signal wires perpendicular to the converters. For a single calorimeter module an energy resoltuion of {sigma}(E)/E*{radical}E(GeV) = 13.6% was achieved. Measurements to determine the relative calibration factors of the calorimeter channels have been made. To examine the influence of saturation effects on these factors, data of ionisation tracks directed parallel and perpendicular to the signal wires have been taken. The MOP algorithm is discussed as a possible method of finding a relevant physical quantity for the calculation of the calibration factors. The results of both measurements are compared. The second part of this paper describes the arrangement of the gas flow control of the photon detection system at SAPHIR. Each of nine gas flows can be selected by a special developed gas switch and is conducted to a thermic mass flow meter. There are 11 such gas switches. A computer takes control over the selection and the periodic measurements. The data are available at any time and give the experimentalist reliable information on the gas flow of all 98 calorimeter moduls.  More>>
Authors:
Publication Date:
Sep 01, 1991
Product Type:
Thesis/Dissertation
Report Number:
BONN-IR-91-53
Reference Number:
SCA: 440104; PA: DEN-92:000700; SN: 92000645579
Resource Relation:
Other Information: TH: Diploma Thesis; PBD: Sep 1991
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CALORIMETERS; PROPORTIONAL COUNTERS; CALIBRATION; MONITORS; GAMMA DETECTION; SHOWER COUNTERS; ENERGY RESOLUTION; ENERGY DEPENDENCE; ALGORITHMS; M CODES; DATA PROCESSING; PARTICLE TRACKS; IONIZATION; GAS FLOW; REMOTE CONTROL; MUON DETECTION; ELECTRONIC GUIDANCE; 440104; HIGH ENERGY PHYSICS INSTRUMENTATION
OSTI ID:
10112699
Research Organizations:
Bonn Univ. (Germany). Physikalisches Inst.; Bonn Univ. (Germany). Mathematisch-Naturwissenschaftliche Fakultaet
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: ON: DE92759281; TRN: DE9200700
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
69 p.
Announcement Date:
Jun 30, 2005

Citation Formats

Ritz, B. Studies on the intercalibration as well as construction and test of a gas-flow monitoring facility of the SAPHIR shower detector; Untersuchungen zur Interkalibration sowie Aufbau und Test einer Gasflussueberwachungsanlage des SAPHIR-Schauerdetektors. Germany: N. p., 1991. Web.
Ritz, B. Studies on the intercalibration as well as construction and test of a gas-flow monitoring facility of the SAPHIR shower detector; Untersuchungen zur Interkalibration sowie Aufbau und Test einer Gasflussueberwachungsanlage des SAPHIR-Schauerdetektors. Germany.
Ritz, B. 1991. "Studies on the intercalibration as well as construction and test of a gas-flow monitoring facility of the SAPHIR shower detector; Untersuchungen zur Interkalibration sowie Aufbau und Test einer Gasflussueberwachungsanlage des SAPHIR-Schauerdetektors." Germany.
@misc{etde_10112699,
title = {Studies on the intercalibration as well as construction and test of a gas-flow monitoring facility of the SAPHIR shower detector; Untersuchungen zur Interkalibration sowie Aufbau und Test einer Gasflussueberwachungsanlage des SAPHIR-Schauerdetektors}
author = {Ritz, B}
abstractNote = {At the SAPHIR detector a large electromagnetic calorimeter has been built to detect photons in forward direction. This photon detection system consists of 98 identical gas sampling calorimeters with signal wires perpendicular to the converters. For a single calorimeter module an energy resoltuion of {sigma}(E)/E*{radical}E(GeV) = 13.6% was achieved. Measurements to determine the relative calibration factors of the calorimeter channels have been made. To examine the influence of saturation effects on these factors, data of ionisation tracks directed parallel and perpendicular to the signal wires have been taken. The MOP algorithm is discussed as a possible method of finding a relevant physical quantity for the calculation of the calibration factors. The results of both measurements are compared. The second part of this paper describes the arrangement of the gas flow control of the photon detection system at SAPHIR. Each of nine gas flows can be selected by a special developed gas switch and is conducted to a thermic mass flow meter. There are 11 such gas switches. A computer takes control over the selection and the periodic measurements. The data are available at any time and give the experimentalist reliable information on the gas flow of all 98 calorimeter moduls. (orig.). [Deutsch] Im Rahmen der Bestimmung der Eichfaktoren einzelner Drahtkanaele zur Verbesserung der Energieaufloesung wurde ein Modul mit Hilfe kosmischer Hoehenstrahlung getestet. Die Impulshoehenspektren der parallel zum Signaldraht verlaufenden Ionisationsspuren waren gaussverteilt und zur Bestimmung der Eichfaktoren wurde das Maximum der gefitteten Gausskurve herangezogen. Ein Zusammenhang zwischen den Eichfaktoren von senkrecht und parallel zum Signaldraht verlaufenden Spuren konnte nicht ermittelt werden, weil sich die Faktoren mal in der einen und mal in der anderen Richtung aendern. In den meisten Faellen sind die Abweichungen kleiner als 5% und nur in wenigen Faellen liegen sie zwischen 5% und 9%. Die Elektronik fuer die rechnergesteuerte Gasflussueberwachungsanlage am Photonennachweissystem des SAPHIR-Detektors wurde weiterentwickelt. Ueber einen speziell hierfuer entwickelten Gasschalter wird einer von neun Zufluessen ausgewaehlt und zur Durchflussmessung zu einem Messkopf weitergeleitet. Von den Messdaten wird fuer jedes Modul getrennt ein Histogramm erstellt, aus dem der zeitliche Verlauf des Gasflusses erkennbar ist. Auf diese Weise kann waehrend eines Messruns der Gasfluss eines jeden Moduls jederzeit kontrolliert werden. (orig./HSI).}
place = {Germany}
year = {1991}
month = {Sep}
}