Reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals

W. Scandale; L. S. Esposito; M. Garattini; R. Rossi; V. Zhovkovska; A. Natochii; F. Addesa; F. Iacoangeli; F. Galluccio; F. Murtas; A. G. Afonin; Yu. A. Chesnokov; A. A. Durum; V. A. Maisheev; Yu. E. Sandomirskiy; A. A. Yanovich; G. I. Smirnov; Yu. A. Gavrikov; Yu. M. Ivanov; M. A. Koznov; M. V. Malkov; L. G. Malyarenko; I. G. Mamunct; J. Borg; T. James; G. Hall; M. Pesaresi

doi:10.1140/epjc/s10052-019-7515-8

2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2019) 79: 993
https://doi.org/10.1140/epjc/s10052-019-7515-8

Regular Article - Experimental Physics

Reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals

W. Scandale¹, L. S. Esposito¹, M. Garattini¹^,9, R. Rossi¹, V. Zhovkovska¹, A. Natochii², F. Addesa³, F. Iacoangeli³, F. Galluccio⁴, F. Murtas⁵, A. G. Afonin⁶, Yu. A. Chesnokov⁶, A. A. Durum⁶, V. A. Maisheev⁶^*, Yu. E. Sandomirskiy⁶, A. A. Yanovich⁶, G. I. Smirnov¹^,7, Yu. A. Gavrikov⁸, Yu. M. Ivanov⁸, M. A. Koznov⁸, M. V. Malkov⁸, L. G. Malyarenko⁸, I. G. Mamunct⁸, J. Borg⁹, T. James⁹, G. Hall⁹ and M. Pesaresi⁹

¹ CERN, European Organization for Nuclear Research, 1211, Geneva 23, Switzerland
² Laboratore de l’Accelerateur Lineaire (LAL), Universite Paris Sud Orsay, Orsay, France
³ INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185, Rome, Italy
⁴ INFN Sezione di Napoli, 80126, Naples, Italy
⁵ INFN, LNF, Via Fermi, 40, 00044, Frascati, Rome, Italy
⁶ NRC Kurchatov Institute-IHEP, 142281, Protvino, Russia
⁷ Joint Institute for Nuclear Research, Joliot-Curie 6, 141980, Dubna, Russia
⁸ Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300, Gatchina, Russia
⁹ Blackett Laboratory, Imperial College, London, SW7 2AZ, UK

^* e-mail: maisheev@ihep.ru

Received: 13 April 2019
Accepted: 28 November 2019
Published online: 9 December 2019

Abstract

We present the experimental observation of the reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals. According to our measurements the rms angle of multiple scattering in the plane orthogonal to the plane of the channeling is less than half that for non-channeled particles moving in the same crystal. In the experiment we use focusing bent single crystals. Such crystals have a variable thickness in the direction of beam propagation. This allows us to measure rms angles of scattering as a function of thickness for channeled and non-channeled particles. The behaviour with thickness of non-channeled particles is in agreement with expectations whereas the behaviour of channeled particles has unexpected features.

© The Author(s), 2019