INTERNATIONAL ISO/ASTM STANDARD 51608 Third edition 2015-03-15 Practice for dosimetry in an X-ray (bremsstrahlung) facility for radiation processing at energies between 50 Kev and 7.5 MeV Pratique de la dosimetrie dans une installation de traitementpar desrayonsX(bremsstrahlung)entre50KeVet7,5MeV Referencenumber ISO/ASTM 51608:2015(E) ISO ISO/ASTMInternational2015 INTERNATIONAL ISO/ASTM51608:2015(E) PDF disclaimer In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. Neither the IsO Central Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to_create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters wereoptimizedforprinting.Everycare has beentaken to ensure that the file is suitable foruse by Isomemberbodies International at the addresses given below. @ISO/ASTMInternational2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the ISO copyright office ASTM International,100 Barr Harbor Drive, PO Box C700. Case postale 56 · CH-1211 Geneva 20 West Conshohocken, PA 19428-2959, USA Tel. +41 22 749 01 11 Tel. +610 832 9634 Fax +41 22 749 09 47 Fax +610 832 9635 E-mail [email protected] E-mail [email protected] Web www.iso.org Web www.astm.org Published in Switzerland = @ ISO/ASTM International 2015 -All rights reserved ISO/ASTM51608:2015(E) Contents Page Scope. 1 2 Referenced documents... 1 3 Terminology .. 2 Significance and use 3 4 Radiationsourcecharacteristics. 4 6 Types of facilities.. 4 Selection and calibration of dosimetry system.. 4 Process parameters. 8 4 9 Installation qualification. 5 10 Operational qualification.... 5 11 Performance qualification.. 7 12 Routine product processing .. 8 13 Certification .... 9 14 Measurement dose uncertaintyand process variability 10 15 Keywords.... 10 10 Annex. Figure A1.1 Beam current density distributions along the scan direction (wide curves) and perpendicular to the scan direction (narrow curves) of No. 1 accelerator of JAERI Takasaki (Fig: 2.1 from Ref (61).... 11 Figure A1.2 X-ray intensity per 2 MeV electron incident perpendicularly on a tantalum target with thickness of one CSDA electron range as a function of emitting angle calculated by the ETRAN code (Fig. 3.3 from Ref (61)) .... 11 Figure A1.3 X-ray intensity per 5 MeV electron incident perpendicularly on a tantalum target with thickness of one CSDAelectron range as a function of emitting angle calculated by ETRAN code (Fig 3.4 from Ref (61)... 11 Figure A1.4 X-ray emission rates from high-Z targets (Fig. E 1 from Ref (76)) 12 Figure A1.5 Spectrum of transmitted photons (Fig 2a from Ref (21)) 12 Figure A1.6 Spectrum of reflected photons (Fig. 2b from Ref (21)) 12 Figure A1.7 Depth dose distributions (Fig. 1 from Ref (9)... 12 Figure A1.8 Dose contour map, moving exposure (Fig.3 from Ref (62) 13 Figure A1.9 Measured attenuation curvesfor5MeVX-Rays in absorbers of various densities, with moving conveyor and scanning beam (Fig.5from Ref (3)) 13 Figure A1.10 Measurement of a high-resolution attenuation curve for 5 MeV X-rays in the heaviest absorber (chipboard) with moving conveyor and scanning (Fig. 6 from Ref (3). 13 @ ISO/ASTM International 2015 All rights reserved ISO/ASTM51608:2015(E) Foreword ISO (the International Organizationfor Standardization)is a worldwidefederationofnationalstandardsbodies International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote. procedures. A project between IS