Clinical servo system for shifting the range of pion beams

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7312452

Liska, D J; Leavitt, J N; Halbig, J K; Dauelsberg, L B

An energy absorbing instrument designed for use with a linear accelerator producing a high intensity beam of negative pions is described. The system makes use of a variable column of energy absorbing fluid with depth controlled by a hydraulic servomechanism to conform to theoretically or experimentally derived sweep curves in the form of histograms or continuous functions. The dose versus depth curves which result from the vertical sweep of this instrument show excellent flattening over the stroke. The details of construction and control of a prototype ''range-shifter'' are described, as well as an innovative design for improving the form and function of the device. A unique method for command-function storage and interrupt control using programmable memories and microprocessor techniques is discussed which has proven satisfactory in applications involving human patients.

• Research Organization: Los Alamos Scientific Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7312452
• Report Number(s): LA-UR-77-544; CONF-770313-10
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ACCELERATOR FACILITIES
ACCELERATORS
BEAMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
ENERGY SPECTRA
EQUIPMENT
LAMPF LINAC
LINEAR ACCELERATORS
MESON BEAMS
MESON FACTORIES
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
PARTICLE BEAMS
PION BEAMS
SERVOMECHANISMS
SPECTRA