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Experimental data on collection efficiency of ionization chamber in pulsed-swept beam

Technical Report:

Abstract

The correction factor accounting for recombination losses of ionization in a chamber becomes quite significant when the instantaneous dose-rate present in the beam is very high, as happens in linear accelerators used for radiation therapy. This is particularly the case of pulsed-swept linacs, where the field homogeneity is obtained by scanning the whole area with a relatively small electron beam. This contribution describes some methods for taking into account recombination effects and presents some experimental results obtained on a pulsed-swept electron beam by using both an ionization chamber and other detectors which are dose-rate independent, such as Fricke solution and thermoluminescent dosemeters (TLD).
Publication Date:
Dec 31, 1991
Product Type:
Technical Report
Report Number:
ETDE-IT-93-22; CONF-9110142-1
Reference Number:
SCA: 550603; 430100; 440102; PA: ITAN-93:000040; SN: 93000925449
Resource Relation:
Conference: Radiation physics meeting,Budapest (Hungary),14-18 Oct 1991; Other Information: PBD: 1991
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; 43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; IONIZATION CHAMBERS; PERFORMANCE; COLLECTIVE ACCELERATORS; RADIOTHERAPY; LINEAR ACCELERATORS; PULSED IRRADIATION; RECOMBINATION; LOSSES; CHEMICAL DOSEMETERS; THERMOLUMINESCENT DOSEMETERS; EXPERIMENTAL DATA; 550603; 430100; 440102; EXTERNAL RADIATION IN THERAPY; DESIGN, DEVELOPMENT, AND OPERATION; RADIATION DOSEMETERS
OSTI ID:
10118504
Research Organizations:
ENEA, Casaccia (Italy). Area Energia Ambiente e Salute; Florence Univ. (Italy)
Country of Origin:
Italy
Language:
English
Other Identifying Numbers:
Other: ON: DE93758935; TRN: 93:000040
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
ITAN
Size:
12 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Scarpa, G, Milano, F, Moscati, M, and Renzi, R. Experimental data on collection efficiency of ionization chamber in pulsed-swept beam. Italy: N. p., 1991. Web.
Scarpa, G, Milano, F, Moscati, M, & Renzi, R. Experimental data on collection efficiency of ionization chamber in pulsed-swept beam. Italy.
Scarpa, G, Milano, F, Moscati, M, and Renzi, R. 1991. "Experimental data on collection efficiency of ionization chamber in pulsed-swept beam." Italy.
@misc{etde_10118504,
title = {Experimental data on collection efficiency of ionization chamber in pulsed-swept beam}
author = {Scarpa, G, Milano, F, Moscati, M, and Renzi, R}
abstractNote = {The correction factor accounting for recombination losses of ionization in a chamber becomes quite significant when the instantaneous dose-rate present in the beam is very high, as happens in linear accelerators used for radiation therapy. This is particularly the case of pulsed-swept linacs, where the field homogeneity is obtained by scanning the whole area with a relatively small electron beam. This contribution describes some methods for taking into account recombination effects and presents some experimental results obtained on a pulsed-swept electron beam by using both an ionization chamber and other detectors which are dose-rate independent, such as Fricke solution and thermoluminescent dosemeters (TLD).}
place = {Italy}
year = {1991}
month = {Dec}
}