arXiv subjects

B. Militsyn

Publications and source records attributed to B. Militsyn.

3 recordsLinked to original sources

arXiv2022

European Strategy for Particle Physics -- Accelerator R&D Roadmap

The 2020 update of the European Strategy for Particle Physics emphasised the importance of an intensified and well-coordinated programme of accelerator R&D, supporting the design and delivery of future particle accelerators in a timely, affordable and sustainable way. This report sets out a roadmap for European accelerator R&D for the next five to ten years, covering five topical areas identified in the Strategy update. The R&D objectives include: improvement of the performance and cost-performance of magnet and radio-frequency acceleration systems; investigations of the potential of laser / plasma acceleration and energy-recovery linac techniques; and development of new concepts for muon beams and muon colliders. The goal of the roadmap is to document the collective view of the field on the next steps for the R&D programme, and to provide the evidence base to support subsequent decisions on prioritisation, resourcing and implementation.

physics.acc-ph↗

arXiv2018

Procedure of simulations for Evaluations of Transient Parameters Stability for RF Cavities Due to Effects of Pulsed RF Heating

The Pulsed RF Heating (PRFH) is the well known effect in the development of high gradient accelerating cavities. There is a lot of research dedicated to the tolerable strength of electromagnetic field and the corresponding temperature rise leading to the surface degradation and cavity performance violation. To provide high quality of electron bunches, RF gun cavities operate in electron sources with high electric, and hence, magnetic RF fields. Being at the safe side with respect to cavity surface degradation, related to the PRFH result for S band in essentially transient thermal deformations, leading to the cavity frequency shift and quality factor change even within a few microseconds in the RF pulse. Thermo-elastic deformations consist of slow heat propagation from the cavity surface and fast elastic wave propagation from the very thin heated surface layer inside the cavity body with different in five orders typical velocities. For simulations of PRFH effects for more or less practical cavity design we can get results only in direct numerical simulations with certified software like ANSYS. The critical issue for such direct simulations is to combine in a single model the possibility of correct description for such qualitatively different process and to prove the reasonable precision of simulations. This report describes the procedure for simulation of PRFH related transient thermo-elastic deformations in S band cavities. The results of test simulations are presented to show the relative precision of simulations.

physics.acc-ph↗

arXiv2017

PERLE: Powerful Energy Recovery Linac for Experiments - Conceptual Design Report

A conceptual design is presented of a novel ERL facility for the development and application of the energy recovery technique to linear electron accelerators in the multi-turn, large current and large energy regime. The main characteristics of the powerful energy recovery linac experiment facility (PERLE) are derived from the design of the Large Hadron electron Collider, an electron beam upgrade under study for the LHC, for which it would be the key demonstrator. PERLE is thus projected as a facility to investigate efficient, high current (> 10 mA) ERL operation with three re-circulation passages through newly designed SCRF cavities, at 801.58 MHz frequency, and following deceleration over another three re-circulations. In its fully equipped configuration, PERLE provides an electron beam of approximately 1 GeV energy. A physics programme possibly associated with PERLE is sketched, consisting of high precision elastic electron-proton scattering experiments, as well as photo-nuclear reactions of unprecedented intensities with up to 30 MeV photon beam energy as may be obtained using Fabry-Perot cavities. The facility has further applications as a general technology test bed that can investigate and validate novel superconducting magnets (beam induced quench tests) and superconducting RF structures (structure tests with high current beams, beam loading and transients). Besides a chapter on operation aspects, the report contains detailed considerations on the choices for the SCRF structure, optics and lattice design, solutions for arc magnets, source and injector and on further essential components. A suitable configuration derived from the here presented design concept may next be moved forward to a technical design and possibly be built by an international collaboration which is being established.

physics.acc-ph↗