The beam breakup instability in quadrupole and solenoidal electron‐beam transport systems
نویسندگان
چکیده
منابع مشابه
The beam breakup instability in quadrupole and solenoidal electron-beam transport systems
Dispersion relations are derived to determine the growth rate, dominant wavelength, and group velocity of disturbances caused by the beam breakup instability. Considerations include weak and strong focusing, x-y coupling in solenoidal transport, the spacing of accelerator cavities, and periodically pulsed beams. Beam breakup growth is minimum when the cavity spacing equals an integral number of...
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In solenoidal beam transport systems, motions in the x and y directions are coupled by the vXB force. A two-dimensional coupled mode description of the beam breakup (BBU) instability is presented; its dispersion relation is derived and compared with the one-dimensional BBU dispersion relation. In the two-dimensional description, instability growth is doubled and two additional wave modes are fo...
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The beam breakup (BBU) instability has been investigated in high-current, long-pulse electron beams propagating through microwave cavities. Experiments are performed using a relativistic electron-beam generator with diode parameters: 0.7-0.8 MV, 1-15 kA, and OS-l.5 ps. The magnitude of the solenoidal magnetic field places these experiments in an intermediate regime between strong focusing and w...
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054401-1 Here we will derive the general theory of the beam-breakup instability in recirculating linear accelerators, in which the bunches do not have to be at the same rf phase during each recirculation turn. This is important for the description of energy recovery linacs where bunches are recirculated at a decelerating phase of the rf wave and for other recirculator arrangements where differe...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 1992
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.351000