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A new concept for the control of a slow-extracted beam in a line with rotational optics, 2

For pt.I see ibid., vol.430, p.512-22, 1999. The current trend in hadron therapy is towards high-precision, conformal scanning of tumours with a `pencil' beam of light ions or protons, delivered by a synchrotron using slow extraction. The particular shape of the slow- extracted beam segment in...

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Detalles Bibliográficos
Autores principales: Benedikt, Michael, Bryant, P J, Pullia, M
Lenguaje:eng
Publicado: 1999
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0168-9002(99)00207-7
http://cds.cern.ch/record/409290
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author Benedikt, Michael
Bryant, P J
Pullia, M
author_facet Benedikt, Michael
Bryant, P J
Pullia, M
author_sort Benedikt, Michael
collection CERN
description For pt.I see ibid., vol.430, p.512-22, 1999. The current trend in hadron therapy is towards high-precision, conformal scanning of tumours with a `pencil' beam of light ions or protons, delivered by a synchrotron using slow extraction. The particular shape of the slow- extracted beam segment in phase space and the need to vary the beam size in a lattice with rotating optical elements create a special problem for the design of the extraction transfer line and gantry. The design concept presented in this report is based on telescope modules with integer- pi phase advances in both transverse planes. The beam size in the plane of the extraction is controlled by altering the phase advance and hence the rotation of the extracted beam segment in phase space. The vertical beam size is controlled by stepping the vertical betatron amplitude function over a range of values and passing the changed beam size from `hand-to-hand' through the telescope modules to the various treatment rooms. In the example given, a combined phase shifter and `stepper', at a point close to the synchrotron, controls both of these functions for all treatment rooms in the complex. The modular nature of the design makes it easy to extend the complex. (5 refs).
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
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spelling cern-4092902019-09-30T06:29:59Zdoi:10.1016/S0168-9002(99)00207-7http://cds.cern.ch/record/409290engBenedikt, MichaelBryant, P JPullia, MA new concept for the control of a slow-extracted beam in a line with rotational optics, 2Accelerators and Storage RingsFor pt.I see ibid., vol.430, p.512-22, 1999. The current trend in hadron therapy is towards high-precision, conformal scanning of tumours with a `pencil' beam of light ions or protons, delivered by a synchrotron using slow extraction. The particular shape of the slow- extracted beam segment in phase space and the need to vary the beam size in a lattice with rotating optical elements create a special problem for the design of the extraction transfer line and gantry. The design concept presented in this report is based on telescope modules with integer- pi phase advances in both transverse planes. The beam size in the plane of the extraction is controlled by altering the phase advance and hence the rotation of the extracted beam segment in phase space. The vertical beam size is controlled by stepping the vertical betatron amplitude function over a range of values and passing the changed beam size from `hand-to-hand' through the telescope modules to the various treatment rooms. In the example given, a combined phase shifter and `stepper', at a point close to the synchrotron, controls both of these functions for all treatment rooms in the complex. The modular nature of the design makes it easy to extend the complex. (5 refs).oai:cds.cern.ch:4092901999
spellingShingle Accelerators and Storage Rings
Benedikt, Michael
Bryant, P J
Pullia, M
A new concept for the control of a slow-extracted beam in a line with rotational optics, 2
title A new concept for the control of a slow-extracted beam in a line with rotational optics, 2
title_full A new concept for the control of a slow-extracted beam in a line with rotational optics, 2
title_fullStr A new concept for the control of a slow-extracted beam in a line with rotational optics, 2
title_full_unstemmed A new concept for the control of a slow-extracted beam in a line with rotational optics, 2
title_short A new concept for the control of a slow-extracted beam in a line with rotational optics, 2
title_sort new concept for the control of a slow-extracted beam in a line with rotational optics, 2
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1016/S0168-9002(99)00207-7
http://cds.cern.ch/record/409290
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