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公开(公告)号：EP0044067A3
公开(公告)日：1982-01-27
申请号：EP81105468
申请日：1981-07-13
发明人： Heinz, Lothar
摘要： The collimator assembly comprises a collimator shielding block for blocking undesired X-rays and an insert piece inserted into the shielding block. The insert piece, which is made of a material of high atomic number, has an inner conical surface which defines the X-ray cone transmitting the insert piece and therefore the maximum field size which can be obtained for medical treatment. In order to supply different maximum field sizes, there are provided means for easily interchanging the insert in the collimator shielding block with another insert having a different interior conical dimension. By using inserts of different cone angles, which can easily be inserted into the shielding block, for instance by means of a screw thread from below the shielding block, moribd tissues of different sizes can be treated while the surrounding healthy tissue is fully protected.
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公开(公告)号：EP0196913A3
公开(公告)日：1987-11-25
申请号：EP86302405
申请日：1986-04-01
发明人： Whitham, Kenneth
CPC分类号： H05H9/04
摘要： @ A linear accelerator includes cascaded standing wave main cavities with approximately the same resonant frequency and plural side cavities. A charged particle beam travels longitudinally through the main cavities. An electromagnetic wave excites the cavities with a frequency that is approximately the same as the resonant frequency of the main cavities. There is normally a fixed electromagnetic energy phase shift in adjacent main cavities. The resonant frequency of at least one side cavity is adjusted so it differs from the electromagnetic wave frequency. The detuned side cavity resonant frequency causes: (a) a change in the normal fixed phase shift of the main cavities adjacent the one side cavity and (b) a decrease in electric field strength in cavities electromagnetically downstream of the one side cavity relative to the electric field strength in cavities electromagnetically upstream of the one side cavity. In different embodiments, the electromagnetic wave is injected into a cavity where the particle beam is upstream and downstream of the one side cavity, respectively.
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公开(公告)号：EP0040751A3
公开(公告)日：1983-06-08
申请号：EP81103650
申请日：1981-05-12
发明人： Gibson, Robert
摘要： The X-ray interlock system is designed for a linear accelerator having no electron beam bending system. The accelerator emits electron pulses which are directed to a target for generation of X-ray pulses. The interlock system contains an ionization chamber, a discriminator and a switch. The chamber is exposed to the X-ray pulses for measuring their intensity distribution. It comprises a control electrode and a plurality of electrode segments. The discriminator is connected for detecting energy inhomogeneities in the X-ray pulses. The switch which is operated by the discriminator is connected to switch the accelerator on and off. The energy interlock system is addapted to be used with linear accelerators in medical treatment.
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公开(公告)号：EP0202097A3
公开(公告)日：1987-12-02
申请号：EP86303603
申请日：1986-05-12
发明人： Tanabe, Eiji , Bayer, Matthew , Trail, Mark
摘要： @ A compact, small diameter, standing-wave linear accelerator structure suitable for industrial and medical applications is disclosed. The novel structure utilizes a new type of coupling cavity for Pi/2 mode, standing-wave operation. The coupling cavity fits into the webs between the accelerating cavities substantially within the diameter of the accelerating cavities. This is made possible by keeping the center section of the cavity thin to concentrate the electric field vector at the center of a section of the cavity and by enlarging the ends of a section of the coupling cavity to accommodate the magnetic field vector. This structure offers a significant reduction in overall diameter over the side-coupled, annular ring, and existing coaxial coupled structures, while maintaining a high shunt impedance and large nearest neighbor coupling (high group velocity). A prototype 4 MeV, 36 cm long, S-band accelerator incorporating the new structure has been built and tested.
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公开(公告)号：EP0136216A3
公开(公告)日：1985-05-02
申请号：EP84401699
申请日：1984-08-21
申请人： C.G.R. MeV
发明人： Tronc, Dominique
IPC分类号： H05H07/00
CPC分类号： H05H7/18
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