Time-correlated single-photon counting (TCSPC) techniques have been used for bunch purity measurement since the Advanced Photon Source (APS) started operations. Recent improvements of the monitor have increased the signal-to-noise ratio and dynamic range to about 100 billion. Resolution improvements of commercial TCSPC components to under 50 ps FWHM allowed us to measure the longitudinal profil...

The analytical treatment previously described [1] has been extended to include the important effect of magnetic quadrupole transverse displacements, the chromatic variation of the magnetic focusing, the energy spread along the bunch and possible microwave quadrupoles, the last two in relation to BNS damping. Both, the longitudinal and transverse equations of motion are solved, the second by usi...

The ANKA storage ring offers different operation modes including the short-bunch mode with bunch lengths tuned down to a few picoseconds. This can lead to the occurrence of micro-bunching instabilities coupled to the emission of coherent synchrotron radiation (CSR) in so-called ’bursts’. To study this CSR instability we use several turn-by-turn enabled detector systems to synchronously measure ...

This paper presents an overview of the bunch-by-bunch feedback kickers designed for the BESSY II storage ring. Simulation results for the longitudinal kicker cavity and for the transverse stripline kicker are discussed.

We present initial experimental results showing the excitation of plasma wakefields by a train of two drive bunches. These wakefields are experienced by a trailing witness bunch that gains energy while retaining a finite energy spread. These well controlled plasma wakefield accelerator (PWFA) experiments are important to test the theory of the PWFA and serve as a testbed for techniques that wil...

Volume fraction of fibres (A), aspect ratio of fibres (B) and fibres orientation (C) are considered as control factors in the determination of hardness strength, hardness strength of plantain fiber reinforced polyester composites (PFR P). These properties were determined for plantain empty fruit bunch (PEFB) and plantain pseudo stem (PPS). Hardness tests were conducted on the replicated samples...

A 100 MeV ‘turn-key’ injector electron linac for the Swiss Light Source (SLS) is under construction at ACCEL Instruments. The system will be installed, commissioned and handed over to the SLS in late 1999, after a 18 month design and production period. This paper will present the special needs of an injector for a third generation synchrotron light source and the two specific modes of operation...

the date palm bunch fading disorder/disease is one of the greatest challenges faced by date palm growers. in the present study, the effect of appropriate orchard management on some qualitative and quantitative features of date palm bunch was studied. for this purpose, two orchards of cv ‘kabkab’ with a history of previous incidence were selected in two districts of bushehr province; tangestan a...

abstract tuberose is one of the most important cut flowers in iran and the world. in this experiment, effect of microelements fe, zn, cu and mn on inflorescence length, inflorescence bunch length, number and diameter of floret, diameter of inflorescence bunch and vase life of tuberose flowers were studied. this study was based on four separate completely randomized experimental design with four...