Diamond Light Source Proceedings

Poster paper

Thermo-mechanical analyses of beryllium compound refractive lens for NSLS-II beamline

V. Ravindranatha1 c1, S. Sharmaa1, O. Chubara1, Y. Caia1 and S. Coburna1

a1 National Synchrotron Light Source II BNL, Upton, NY 11973-5000, USA

Abstract

In this paper we discuss the finite-element analysis (FEA) of a one-dimensional beryllium compound refractive lens (Be-CRL) that was undertaken to study the feasibility of installing the CRL in the Inelastic X-ray Scattering (IXS) beamline of National Synchrotron Light Source-II (NSLS-II) (a new state-of-the-art medium-energy third-generation storage ring). The current insertion device for this beamline is an IVU22-6m in-vacuum planar undulator delivering a total power of ~9 kW with a peak power density of ~90 kW/mrad2. Through analysis, based on calculation of spectral angular distribution of undulator radiation from IVU22, we determined that it is essential to install a 30 µm graphite filter upstream of the CRL in order to restrict the temperature rise in the CRL to 65°C for acceptable thermal strain.

(Received June 14 2010)

(Revised December 02 2010)

(Accepted February 21 2011)

(Online publication April 12 2011)

Correspondence

c1 Email address for correspondence: vishy@bnl.gov