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BMy. CepHH 3. OH3HKA. ACTPOHOMHfl. 2022. №2
Undulators and Light Production
with the XLS-CompactLight Design Study
F. Nguyen1'", M. Carpanese1, A Petralia1, A Bernhard2, J Arnsberg2, S Fatehi2, J Gethmann2, S Grohmann2, B Krasch2, T Schmidt3, M Calvi3, S Danner3, K Zhang3, N Thompson4, J.A Clarke4, H.M Castaneda Cortés?4,
D.J Dunning4, A Hinton4, B Shepherd4, R Geometrante5, M Kokole6, T Milharcic6, J Pockar6, A Aksoy6, Z Nergiz7'8, J Marcos9, F Perez9, A.W Cross10, L Zhang10, D Zhu11, S.C Richter12, A Latina12, A Cianchi13,
V Goryashko14, G D'Auria15, S Di Mitri15, R Rochow15 E-mail: afederico.nguyen@enea.it
1 ENEA-Frascati, Frascati, Italy. 2Karlsruhe Institute of Technology, Karlsruhe, Germany. 3Paul Scherrer Institut, Villigen, Switzerland. 4STFC Daresbury Laboratory, Daresbury, United Kingdom. 5Kyma SpA, Trieste, Italy. 6Kyma Tehnologija d.o.o., Sezana, Slovenia. 7Ankara University, Ankara, Turkey. 8Nigde Omer Halisdemir University, Nigde, Turkey. 9ALBA Synchrotron — CELLS, Barcelona, Spain. 10 University of Strathclyde, Glasgow, United Kingdom. 11ANSTO, Lucas Heights, Australia. 12CERN, Geneva, Switzerland. 13University of Roma Tor Vergata, Roma, Italy. 14 Uppsala University, Uppsala, Sweden. 15Elettra-Sincrotrone Trieste, Trieste, Italy.
Received February 22, 2022
Free Electron Laser (FEL) facilities provide broadly tunable and highly coherent photon beams. These machines still have an unexplored potential and development. The XLS-CompactLight design aims at a flexible Hard plus Soft X-ray FEL facility exploiting the latest concepts in terms of short period magnetic undulators, paving the road towards more compact photon sources.
Keywords: free-electron laser; undulator magnet.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 241-244.
Anisotropic Flow Measurements in MPD Experiment Using Two- and Three-Particle Correlation Scalar Product Method
Petr Parfenov E-mail: PEParfenov@mephi.ru
National Research Nuclear University MEPhl Moscow, Russia Received January 16, 2022
Multi-Purpose Detector (MPD) experiment at NICA collider has the potential of discoveries in the QCD phase diagram region with high net-baryon densities and moderate temperatures. Anisotropic elliptic flow v2 flow is one of the key observables to study the properties of matter created in heavy-ion collisions. The application of two- and three-particle correlation scalar product methods for elliptic flow measurements in MPD is discussed in this work.
Keywords: heavy ion collisions, anisotropic flow, MPD experiment, NICA.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 245-246.
Evidence for the Chiral Anomaly in the Coherent Scattering of Kaons
on Copper Nuclei
A.Yu. Polyarush (OKA collaboration) E-mail: polyarush@yandex.ru
Institute for Nuclear Research, Russian Academy of Sciences. Moscow, Russia Received January 16, 2022
On the statistics of ~ 1.7 • 108 interactions of positively charged kaons on copper nuclei coherent events of the K+n0-system production are selected. Cross sections for the Coulomb, coherent strong components and their interference in the region of K*(892)-meson are measured.
When studying the mass spectrum of the K+n0-system, an effect is found, which can be interpreted as the interference of the chiral anomaly and the K*(892) s-channel amplitudes. This gives an estimate for the ratio of the observed amplitude of the chiral anomaly to the theoretical one: Aexp/Ath =0.90 ± 0.24 (stat.) ±0.3 (syst.). Keywords: kaon, QCD, chiral anomaly.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 250-251.
