Coherent synchrobetatron beam-beam modes: Experiment and simulation
نویسندگان
چکیده
منابع مشابه
Coherent synchrobetatron beam-beam modes: experiment and simulation.
Analytic calculation and numerical simulations reveal a multiline structure in the spectrum of coherent dipole oscillations in the colliding beam system due to coupled synchrobetatron beam-beam modes. The model employed in the analysis involves linearization of the beam-beam kick and takes into account the fact that the length of the colliding bunches is finite. In the present paper, we discuss...
متن کاملA Symplectic Model of Coherent Beam-Beam Quadrupole Modes
We consider a simple model to study the effects of the beam-beam force on the dynamics of colliding beams. We focus on the quadrupole modes of the coherent oscillation. The ingredients are: (1) linearized beam-beam kicks, (2) damping and noise due to synchrotron radiation, and (3) linear transport between beam-beam kicks. The dynamical variables are the 2nd-order moments of the canonical variab...
متن کاملCoherent Beam-Beam Modes in the LHC for Multiple Bunches, Different Collision Schemes and Machine Symmetries
In the LHC almost 3000 bunches in each beam will collide near several experimental regions and experience headon as well as long range beam-beam interactions. In addition to single bunch phenomena, coherent bunch oscillations can be excited. Due to the irregular filling pattern and the unsymmetric collision scheme, a large number of possible modes must be expected, with possible consequences fo...
متن کاملCoherent beam-beam tune shift of unsymmetrical beam-beam interactions with large beam-beam parameter.
Coherent beam-beam tune shift of unsymmetrical beam-beam interactions was studied experimentally and numerically in HERA, where the lepton beam has such a large beam-beam parameter (up to xi(y) = 0.272 ) that the single-particle motion is locally unstable at the origin (closed orbit). Unlike the symmetrical case of beam-beam interactions, the ratio of the coherent beam-beam tune shift and the b...
متن کاملBeam shaping using Gaussian beam modes.
A beam shaping method is presented where a diffractive optical element (DOE) is designed by optimizing the complex mode coefficient weights of a set of Gaussian beam modes. This method is compared with the more standard unidirectional approach. Differential evolution is used for the optimization in both the unidirectional and Gaussian beam mode optimization methods. For the particular transform...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2002
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.65.056502