COMMISSIONING OF THE STORAGE RING FOR THE KHARKOV GENERATOR OF X-RAY RADIATION NESTOR V. Androsov, S. Bazarov, V. Berezka, A. Bezdetko, A. Cherkashin, A. Dovbnya, A. Gevchuk, P. Gladkikh, S. Gokov, A. Gordienko, V. Grevtsev, A. Gvozd, V. Ivashenko, A. Kalamayko, I.I. Karnaukhov, I.M. Karnaukhov, V. Kozin, V. Lyashchenko, V. Margin, N. Mocheshnikov, M. Moisieienko, A. Mytsykov, F. Peev, A. Rezaev, V. Sergienko, A. Shcherbakov, V. Shpagina, N. Shul’ga, V. Skomorokhov, D.Tarasov, V. Trotsenko, V. Tsyats'ko, A. Zelinsky, A. Zolochevskiy, O. Zvonaryova, NSC KIPT, 61108, Kharkov, Ukraine J.I.M. Botman, Eindhoven University of Technology, Netherlands Abstract During 2015-2017 the X-ray source NESTOR (New Electron STOrage Ring) based on a storage ring with low beam energy and Compton scattering of intense laser beam is under commissioning at the National Science Center "Kharkov Institute of Physics and Technology Institute" (NSC KIPT). The start-up of the injector and storage ring is one of the basic task for the facility commissioning. In the paper, the results of the NESTOR X-ray source 200 MeV electron storage ring commissioning are described and further plans are discussed. INTRODUCTION Compton backscattering is the most efficient photon energy amplifier. The energy of the scattered photons can be describe by the formula: 0 2 4 γ γ ε γ ε ≈ CBS , (1) where ε γ0 is the energy of colliding photons and ε γCBS is the energy of scattered photons , γ = E 0 / mc 2 , E 0 is the relativistic electron beam energy and mc 2 is the rest energy of the electron. For example, using an electron beam with an energy of 50 MeV and a laser with a photon energy of 1 eV, one can obtain the hard X-ray radiation necessary for X-ray angiography. The total intensity of scattered photons is: c r l e C CBS f N N N 2 4 πσ σ γ ≈ , (2) where σ C is the Compton cross section, N e , N l are the number of the particles on both bunches (electrons and photons), f c is repetition frequency of the interaction and σ r is the transverse spot size. X-RAY GENERATOR NESTOR The last several years the source of the X-rays NESTOR (New Electron STOrage Ring) based on a storage ring with low beam energy and Compton scattering of intense laser beam is under testing and commissioning at the National Science Center "Kharkov Institute of Physics and Technology Institute" (NSC KIPT) [1-3]. The facility consists of the compact 40-225 MeV storage ring, linear 35-90 MeV electron accelerator as an injector, beam transportation system, Nd:Yag laser system and optical cavity. It is expected that the facility will generate X-rays flux of about 10 13 phot/s. The main facility design specifications are listed in Table 1. Table 1: Design Specifications Parameter Value Storage ring circumference, m 15.418 Electron beam energy range, MeV 40-225 Betatron horizontal tune, Qx 3.155 Betatron vertical tune, Qy 2.082 Amplitude functions βx , βz at IP, m 0.14, 0.12 Linear momentum compaction factor α1 0.01-0.08 RF acceptance, % >5 RF frequency, MHz 700 Electron bunch current, mA 100 Number of circulating electron bunches 1,2,3,4, 36 LINAC Inj. channel HECTOP IP Gamma-rays Object Figure 1: Scheme of the X-ray generator NESTOR. Figure 2:NESTOR storage ring lattice layout. B1-B4 are dipole magnets with combined focusing function, Q1-Q10 are quadrupole magnets, S1-S7 are sextupole magnets, OS1-OS2 are octupole magnets combined with sextupole magnets. 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing ISBN: 978-3-95450-184-7 doi:10.18429/JACoW-IPAC2018-THPMK008 02 Photon Sources and Electron Accelerators A04 Circular Accelerators THPMK008 4307 Content from this work may be used under the terms of the CC BY 3.0 licence (© 2018). Any distribution of this work must maintain attribution to the author(s), title of the work, publisher, and DOI.