کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1832026 1027510 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transverse beam sizes and quasi emittances for linearly coupled optics
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Transverse beam sizes and quasi emittances for linearly coupled optics
چکیده انگلیسی
Two transverse eigenmode rms emittances are defined statistically in the uncoupled normalized coordinate system. They are assumed to be adiabatic invariants. With linear coupling's action-angle parameterization, the strict expression for the beam size matrix in the laboratory coordinate system is obtained. It can be expressed in matrix P defined in the action-angle parameterization or in Twiss and coupling parameters defined in Edwards-Teng's parameterization, along with the eigenmode rms emittances. Numerical simulation calculations are carried out to check the analytical expressions and to verify the adiabatic eigenmode rms emittance invariants during the skew quadrupole magnet ramping. With linear coupling's matrix perturbation approach, the strict expressions of the horizontal and vertical beam sizes in the laboratory coordinate system are approximated to give the quasi horizontal and vertical beam emittances under the weak linear difference coupling situation. The predictions of quasi horizontal and vertical beam emittances from different approximations are presented and discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 562, Issue 1, 15 June 2006, Pages 57-64
نویسندگان
,