A. V. Smirnov

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New results from the investigation of 2 T superferric model dipoles operating at 4 T/s, 1 Hz are presented. The works are performed within the R&D program on the design of the SIS100 synchrotron at GSI in Darmstadt. One of the main research goals is minimization of overall AC power losses in the magnet at 4 K level. Different modifications of the dipole(More)
NICA is a new accelerator collider complex under construction at JINR. The facility is aimed at providing collider experiments with heavy ions up to Uranium in a center of mass energy range from 4 to 11 GeV/u and an average luminosity up to 10<sup>27</sup> cm <sup>-2</sup> s<sup>-1</sup>. The collisions of polarized deuterons are also foreseen. The facility(More)
We report progress on the R&amp;D program for electron-cooling of the Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The electron source will be a superconducting RF photocathode gun. The accelerator will be a superconducting energy recovery linac. The frequency of(More)
The possibilities of construction superconducting synchrotron magnets with pulse repetition rate up to 20 Hz are analyzed. Different design concepts are considered. The expected AC power losses and the magnet cooling conditions are calculated based on the data which have been obtained under design, construction and long term tests of 2 T superferric dipoles(More)
Standard models of the intra-beam scattering (IBS) are based on the growth of the rms beam parameters for a Gaussian distribution. As a result of electron cooling, the core of beam distribution is cooled much faster than the tails, producing a denser core. In this paper, we compare various approaches to IBS treatment for such distribution. Its impact on the(More)
High-energy electron cooling of RHIC presents many unique features and challenges. An accurate estimate of the cooling times requires a detailed calculation of the cooling process, which takes place simultaneously with various diffusive mechanisms in RHIC. In addition, many unexplored effects of high-energy cooling in a collider complicate the task of(More)
* This work is supported by DOE SBIR No. DE-FG03-96ER82213. Abstract We consider novel designs that provide field flatness of fundamental mode in transverse dimensions of planar rf structures. These designs include waveguides with slotted irises and/or dielectric loaded side openings. The specially modified, advanced planar structures can be produced with(More)
We present here a design of a 15.6-GHz ceramic power extractor. Design features include an upstream parasitic mode damper with additional tapering, and a single-port coupler considered in two variants. Performance analysis includes coupler tolerances and overvoltage, dipole mode wake and BBU, as well as wakefield losses induced in the damper, tapers, and(More)
It is described a development of the microsecond E-beam generators U-2 and U-3 intended for the plasma heating experiments on the GOL-3 device [1]. Presented results are concerning to both an increase of energy content in the beam pulse and a rise of the beam power.
* This work is supported by DOE SBIR No. DE-FG03-96ER82156. Abstract Performance of a single-section, S-band, Plane-WaveTransformer (PWT) photoelectron linac is characterized by a high (multi-ampere) average current required for advanced applications such as Compton x-ray sources and linear collider. Single bunch dynamics and multi-bunch beam loading(More)