Abstract

The thin target could be used for beam diagnostics by means the radiation that is induced by interaction of beam particles with target matter. The electron beams used in modern applications (as, for example, modern FELs) have very large brightness, small emittance as well as very short bunch length. For example, the bunch length of XFEL is about of 25 um at bunch charge order of 1 nC and with electrons energy of 17.5 GeV. The passage of this powerful short bunches could damage the target or even completely destroy it. In the presented work the train of such bunches passages through the target is investigated. It is shown the target works in extreme regime close to phase transition temperature.

Highlights

  • Intense ultrashort soft and hard X-ray pulses will give rise to new opportunities for studies in time-resolved spectroscopy, diffraction, and imaging. These pulses can be generated from freeelectron lasers (FELs) such as FLASH (DESY, Germany) [1], LCLS (SLAC, USA) [2], SACLA (Spring-8, Japan) [3], or the European XFEL (DESY, Germany) [4]

  • The applicability of beam diagnostics schemes that use the radiation in solid targets at FELs parameters demands the additional investigations

  • In this paper the heating of thin target was investigated when it is irradiated by the train of short powerful electron bunches

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Summary

Introduction

Intense ultrashort soft and hard X-ray pulses will give rise to new opportunities for studies in time-resolved spectroscopy, diffraction, and imaging These pulses can be generated from freeelectron lasers (FELs) such as FLASH (DESY, Germany) [1], LCLS (SLAC, USA) [2], SACLA (Spring-8, Japan) [3], or the European XFEL (DESY, Germany) [4]. The applicability of beam diagnostics schemes that use the radiation in solid targets at FELs parameters demands the additional investigations. The interaction of the short powerful bunches with a solid medium leads to fast and significant local heating in the small volume of target. This work is devoted to the investigation of the target heating at FELs electron beam parameters. Than the simulations are carried out to estimate possible thermal damage of the target as well as to find the safe regime of the beam passage

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