Dzhelepov Laboratory of Nuclear Problems

DLNP joint laboratory seminar

Date and Time: Thursday, 9 June 2022, at 11:00 AM

Venue: DLNP Conference Hall, Dzhelepov Laboratory of Nuclear Problems, online on Zoom

Information about seminar and link to join online

1. Seminar topic: “Increasing critical currents of HTS tapes by proton irradiation”

   Speaker: Mikhail Novikov (VBLHEP)

   Abstract:

   Adding artificial pinning centers (APCs) to a superconductor, the maximum critical current can be achieved under the required magnetic field (the concentration of APCs is selected) and at a given operating temperature (the size of APCs). It is necessary to increase the critical current of a modern HTS tape by 2-3 times at 65 K in 2 T for new Nuclotron magnets and medical cyclotrons. Proton cyclotrons with large flows are convenient for the formation of defects in long pieces of HTS tapes. The Phasotron facility has already obtained an increase in the critical current at 65 K in 2 T more than twice. On the prototype of the industrial APC technology, with rewinding of long pieces of the HTS tape through the beam, the optimal dose and spectrum of protons will be found. The winding for a portable proton accelerator up to 15 MeV (to create APCs) is considered, wound from a proton-modified HTS tape.

2. Seminar topic: “Prospects for the application of high-temperature superconductivity in cyclotrons”

   Speaker: Oleg Karamyshev

   Abstract:

   High-temperature superconductivity (HTS) technologies are developing rapidly and are almost ready for use in cyclotron magnets, which can be especially useful in the development of medical cyclotrons. However, the still high cost of HTSs limits their application. The concept of a cyclotron is proposed which has the minimal power consumption and as a result, allows minimizing the consumption of a conductor to create a magnet winding. The design features significantly lower weight and power consumption compared to the majority of existing cyclotrons for the same energy.