RuPAC 2006 - List of Authors

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Sajaev, V.

Paper	Title	Page
MONO05	X-Ray Slicing And Compression Using Deflecting Cavities In The Advanced Photon Source: A Feasibility Study V.Sajaev for the APS study team ANL, USA Conventional third-generation light sources can provide radiation pulses with duration of the order of 100 ps. However, there is growing interest within the synchrotron radiation user community in performing experiments with even shorter x-ray pulses. It was recently proposed by A. Zholents et al. to use rf orbit deflection to generate sub-ps x-ray pulses. In this scheme, two deflecting cavities are used to deliver a longitudinally dependent vertical kick to the beam, thus exciting longitudinally correlated vertical motion of the electrons. This makes it possible to spatially separate the radiation coming from different longitudinal parts of the beam. An optical slit can then be used to slice out a short part of the radiation pulse, or an asymmetrically cut crystal can be used to compress the radiation in time, or coordinate-time correlation in the x-ray pulse can possibly be used for time-dependent measurements. In this paper we present a feasibility study of this method applied to the Advanced Photon Source. We find that the pulse length can be decreased down to a 1 ps range using superconducting deflecting cavities.

Paper

Title

Page

MONO05

X-Ray Slicing And Compression Using Deflecting Cavities In The Advanced Photon Source: A Feasibility Study

V.Sajaev for the APS study team
ANL, USA

Conventional third-generation light sources can provide radiation pulses with duration of the order of 100 ps. However, there is growing interest within the synchrotron radiation user community in performing experiments with even shorter x-ray pulses. It was recently proposed by A. Zholents et al. to use rf orbit deflection to generate sub-ps x-ray pulses. In this scheme, two deflecting cavities are used to deliver a longitudinally dependent vertical kick to the beam, thus exciting longitudinally correlated vertical motion of the electrons. This makes it possible to spatially separate the radiation coming from different longitudinal parts of the beam. An optical slit can then be used to slice out a short part of the radiation pulse, or an asymmetrically cut crystal can be used to compress the radiation in time, or coordinate-time correlation in the x-ray pulse can possibly be used for time-dependent measurements. In this paper we present a feasibility study of this method applied to the Advanced Photon Source. We find that the pulse length can be decreased down to a 1 ps range using superconducting deflecting cavities.

WEJO03

Determination Of Precise Model Of A Storage Ring Using Response Matrix Fit: application to Advanced Photon Source and Tevatron

V.Sajaev, V.Lebedev, V.Nagaslaev, A.Valishev
ANL USA

Response matrix fit has proved itself as a very powerful tool for storage ring model determination and optics measurements. First application of this technique was reported at NSLS and then it was further developed at ALS. For the past several years this method was extensively used at APS for optics correction and development. The software developed at APS was also successfully employed at Tevatron, where physicists were able to increase luminosity by about 15% based on the newly developed model. In this paper we will describe the technique and show its various applications to the APS storage ring and Tevatron including transverse impedance determination at APS.