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Title: Method and apparatus for laser-controlled proton beam radiology

Abstract

A proton beam radiology system provides cancer treatment and proton radiography. The system includes an accelerator for producing an H.sup.- beam and a laser source for generating a laser beam. A photodetachment module is located proximate the periphery of the accelerator. The photodetachment module combines the H.sup.- beam and laser beam to produce a neutral beam therefrom within a subsection of the H.sup.- beam. The photodetachment module emits the neutral beam along a trajectory defined by the laser beam. The photodetachment module includes a stripping foil which forms a proton beam from the neutral beam. The proton beam is delivered to a conveyance segment which transports the proton beam to a patient treatment station. The photodetachment module further includes a laser scanner which moves the laser beam along a path transverse to the cross-section of the H.sup.- beam in order to form the neutral beam in subsections of the H.sup.- beam. As the scanning laser moves across the H.sup.- beam, it similarly varies the trajectory of the proton beam emitted from the photodetachment module and in turn varies the target location of the proton beam upon the patient. Intensity modulation of the proton beam can also be achieved by controllingmore » the output of the laser.« less

Inventors:
 [1]
  1. Warrenville, IL
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
OSTI Identifier:
871597
Patent Number(s):
US 5760395
Assignee:
Universities Research Assoc., Inc. (Washington, DC)
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; laser-controlled; proton; beam; radiology; provides; cancer; treatment; radiography; accelerator; producing; laser; source; generating; photodetachment; module; located; proximate; periphery; combines; produce; neutral; therefrom; subsection; emits; trajectory; defined; stripping; foil; forms; delivered; conveyance; segment; transports; patient; station; scanner; moves; path; transverse; cross-section; form; subsections; scanning; similarly; varies; emitted; target; location; intensity; modulation; achieved; controlling; output; proton beam; laser beam; laser source; neutral beam; proton radiography; scanning laser; cancer treatment; target location; located proximate; laser scanner; proton radiograph; beam radiology; laser scan; /250/

Citation Formats

Johnstone, Carol J. Method and apparatus for laser-controlled proton beam radiology. United States: N. p., 1998. Web.
Johnstone, Carol J. Method and apparatus for laser-controlled proton beam radiology. United States.
Johnstone, Carol J. 1998. "Method and apparatus for laser-controlled proton beam radiology". United States. https://www.osti.gov/servlets/purl/871597.
@article{osti_871597,
title = {Method and apparatus for laser-controlled proton beam radiology},
author = {Johnstone, Carol J},
abstractNote = {A proton beam radiology system provides cancer treatment and proton radiography. The system includes an accelerator for producing an H.sup.- beam and a laser source for generating a laser beam. A photodetachment module is located proximate the periphery of the accelerator. The photodetachment module combines the H.sup.- beam and laser beam to produce a neutral beam therefrom within a subsection of the H.sup.- beam. The photodetachment module emits the neutral beam along a trajectory defined by the laser beam. The photodetachment module includes a stripping foil which forms a proton beam from the neutral beam. The proton beam is delivered to a conveyance segment which transports the proton beam to a patient treatment station. The photodetachment module further includes a laser scanner which moves the laser beam along a path transverse to the cross-section of the H.sup.- beam in order to form the neutral beam in subsections of the H.sup.- beam. As the scanning laser moves across the H.sup.- beam, it similarly varies the trajectory of the proton beam emitted from the photodetachment module and in turn varies the target location of the proton beam upon the patient. Intensity modulation of the proton beam can also be achieved by controlling the output of the laser.},
doi = {},
url = {https://www.osti.gov/biblio/871597}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {6}
}

Works referenced in this record:

Observation of Two-Electron Photoionization of the H Ion near Threshold
journal, May 1982


Production of Pulsed Particle Beams by Photodetachment of H
journal, December 1971


Effects of strong electric fields on resonant structures in H photodetachment
journal, June 1983


Observation of Resonances near 11 eV in the Photodetachment Cross Section of the H Ion
journal, January 1977


Test of the special-relativistic Doppler formula at β=0.84
journal, January 1986


Energy measurement of the lowest P 0 1 Feshbach resonance in H
journal, September 1985


Observation of Narrow Resonances in the H Photodetachment Cross Section near the n = 3 Threshold
journal, December 1979


Effect of an Electric Field upon Resonances in the H Ion
journal, January 1978


Observation of multiphoton detachment of the H ion
journal, June 1989


Shape Resonances in the Hydrogen Stark Effect in Fields up to 3 MV/cm
journal, August 1984


Resonant Two-Photon Detachment through the Lowest Singlet D State in H
journal, October 1995


Observation of motional-field-induced ripples in the photodetachment cross section of H
journal, June 1987


Stability of the o 1 shape resonance in H in moderate electric fields
journal, February 1987


Effects of electric fields on the photodetachment cross section of the H ion near threshold
journal, December 1988


Response of the P o 1 resonance near n= 3 in the H continuum to external electric fields
journal, November 1987


Further studies of H photodetachment in electric fields
journal, June 1990