| Paper | Title | Page |
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| WEPC017 | Short X-ray Pulse Generation in Taiwan Photon Source Using Deflecting Cavity | 2025 |
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| We have purposed to use deflecting cavity for short X-ray pulses production in 3 GeV Taiwan Photon Source (TPS). Typical electron bunch length in TPS for 1.1MV RF gap voltage is about 5.7mm. Deflecting cavity generates correlation between longitudinal position and vertical momentum of particles in a bunch. Vertical kick of particle separates the photons that emit from ID vertically. Slit and asymmetric crystal in TPS beam line are used to compress the photon pulse duration. For a 60 m beam line of TPS, the operating of deflecting cavity up to 6MV voltage and eighth harmonic yields an FWHM pulse duration of radiated X-ray of about 0.48 ps for users. | ||
| THPC003 | Sum of Emittance in the Presence of a Linear Coupling | 2975 |
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In this article, the influence of linear coupling due to skew quadrupoles on the transverse equations of motion and emittances in accelerators is studied*. We first introduce the definition of the transverse single particle emittances using the Floquet transformation in alternating gradient as well as the constant focusing rings, then in the presence of the linear coupling, due to skew quadrupoles we introduce the coupled differential equations governing the particles motion and try to solve them by a direct method and also using the normal modes of motion to find the relation between the two transverse emittances. Based on smooth approximation and using the normal modes** we solve the equations of motion of a test charged particle and derive two new formulas for the sum of the emittances, and the conditions under which this sum is invariant.
*P. J.Bryant, CERN Acclerator School, CERN, PROCEEDINGS, 94-01, Vol. I. |