Instruments and Experimental Techniques最新文献

The linear accelerator (linac) with a mass-to-charge ratio of A/Z = 8, an energy of 4 MeV/n and a current of 10 mA is under develop at the National Research Center Kurchatov Institute. The linac consists of an accelerator with radio frequency quadrupole (RFQ) operating at a frequency of 40 MHz, and two accelerating structures with drift tubes DTL₁ and DTL₂ operating at frequencies of 80 and 160 MHz, respectively. It is assumed that the accelerating structure of DTL₁ will consist of 12 two-gap quarter-wave resonators.

A concept of an energy-saving synchrotron radiation source is being developed at the Budker Institute of Nuclear Physics. One of the main differences between the new radiation source and the existing ones is the absence of DC power supplies and water-cooled coils for most elements of the magnetic system that use permanent magnets. To test this new technical solution, prototypes of bending magnets were designed and are being manufactured. This paper describes the measurement technique and presents the preliminary results of measuring the parameters of permanent magnets.

The article presents new applications of bent crystals in accelerator science, which can stimulate new experiments in high-energy physics: particle channels of new type made for positive secondary particles and production of high-energy neutrino beams and a crystalline muon collider. Proposals were formulated for the use of crystals in large hadron colliders, which were confirmed by experimental studies both at CERN accelerators and at the domestic U-70 accelerator.

The method of inverse Compton scattering of laser photons is an effective method for obtaining energy-tunable and quasi-monochromatic gamma-quanta. To obtain such photon beams, Compton sources based on electron storage rings are used. This paper describes a design for a storage ring with a maximum electron energy of 2 GeV to obtain Compton gamma quanta in a wide energy range.

A concept of a 16 : 1 combiner with a continuous-wave high-frequency 500-kW power at a frequency of 500 MHz, which is based on a WR1800 rectangular waveguide, and its 4 : 1 prototype, is discussed. The combiner operates at 32-kW continuous power supplied to each of the inputs and is equipped with a water-cooling system for the antennas. Cooling is implemented through a shorted segment of the coaxial line, and the RF power is supplied through a side line. The results of studying the characteristics and features of the 16 : 1 power combiner and its 4 : 1 prototype are presented.

The NICA accelerator complex consists of three superconducting rings: the Nuclotron synchrotron, which has been in operation since 1993, the Booster synchrotron, which has been commissioned since 2021, and the collider under construction. The paper presents the production status of elements of the NICA collider magnetic-cryostat system and the results of cryogenic tests of superconducting magnets, including training of superconducting coils, measurements of magnetic field parameters, measurements of static heat leak and dynamic heat releases.

The production of Al and Ti ion beams were investigated using different methods. The experiments were performed with the DECRIS-2M and DECRIS-PM ion sources at the test bench of the electron-cyclotron resonance (ECR) sources and at the DC-280 cyclotron.

A design for a high-brightness X-ray source with low (an order of magnitude lower than existing and currently under construction) energy consumption is considered. Such qualitative gains are achieved through the use of new technologies. The magnetic system of the electron storage ring, which uses electromagnets in existing sources, is built on the basis of permanent magnets made of neodymium-iron-boron alloy. In addition to zero power consumption, the permanent magnet magnetic system ensures high stability of radiation parameters since the magnetic field in it is never switched off.

Compact RF cavities are designed to generate a magnetic RF field that induces RF transitions between the spin states of hydrogen and deuterium atoms in sources of polarized ions. The cavities operate either at a frequency of ~380 MHz for polarized deuterium atoms or at a frequency of ~1480 MHz for polarized hydrogen atoms. In both cases, a single plane of particle polarization is provided. A uniform distribution of the magnetic RF field is formed with a minimal parasitic component transverse to the polarization plane. Options for the technical implementation of cavities are considered.

The linear accelerator (linac) with a mass-to-charge ratio of A/Z = 8, an energy of 4 MeV/n, and a current of 10 mA is under develop at the National Research Center Kurchatov Institute. The linac consists of an accelerator with radio frequency quadrupole (RFQ) operating at a frequency of 40 MHz, and two accelerating structures with drift tubes DTL₁ and DTL₂ operating at frequencies of 80 and 160 MHz, respectively. It is assumed that the accelerating structure of DTL₂ will consist of 28 five-gap quarter-wave resonators.