1. Dr. Zafer Nergiz Nigde University THE STATUS OF TURKISH LIGHT SOURCE

2. Outline The Goals of the machine New storage ring design parameters Synchrotron radiation Comparison of other light sources with TURKAY Conclusion 2 Zafer Nergiz, UPHUK-5, 07.09.2013

3. The goals of the storage ring suggested after LSUM- 2012 (Light Source User Meeting) 3 GeV electron beam energy Low emittance; below 1 nm rad Short circumference; below 500 m A new ring is designed according to the suggestions in user meeting Linear and nonlinear effects are investigated The radiation properties are investigated. Some special cases (such as 0 dispersion) options are compared 3 Zafer Nergiz, UPHUK-5, 07.09.2013

4. The Parameters and Lattice of The storage ring The storage ring is composed with 18 main cells Main cell consists of 4 bending magnets and 4 different type 16 quadrupol magnets. The circumference is 467 m Natural horizantal emittance is 0.68 nm rad. The number of straight section is 18 Zafer Nergiz, UPHUK-5, 07.09.2013 4

5. Beam Parameters ParameterValue Energy (GeV)3 Circumference (m)467.08 Beam Current (mA)500 mA Bet. Tunes Q x /Q y 31.24/6.17 Nat. Chromaticity x 0x /x 0y -68/-35 Cor. Chromaticity x 0x /x 0y 0.4/0.6 Energy loss / turn (keV)347.4 H. emittance (nm)0.68 V. emittance (nm)0.0068 Betaxmax (m)15.7 Betaymax (m)26.9 Betax in the mid. of straight sect.(m)13.9 Betay in the mid. of straight sect. (m)6.6 Dispx in the middle of straight sect.0.14 Number of straight section18 Length of straight section (m)6 Rf Voltage (MV)3.5 Harmonic number778 Max. Number of bunch778 Bunch charge (nC)1.0 RMS Bunch length (mm)2.28 RMS Energy Spread (%)0.056 Momentum Acceptence (%)4.3 Coupling (%)1 Touschek Life time (h)10.2 The working point is chosen where the third order resonance driving terms and tune shifts are as small as possible. 6 families of sextupol are used to correct chromaticity and to compensate nonlinearities. The length of straight sections is 6 m. The bending magnets are 1.8 m length and the magnetic field in the bending magnets is 0.48 T Zafer Nergiz, UPHUK-5, 07.09.2013 5

6. Beam Parameters vs. Momentum offset  Qx and  Qy,Emittance, Betax, Betay, vs. momentum deviation 6 Zafer Nergiz, UPHUK-5, 07.09.2013

7. Touschek Lifetime One of the issues of a low emittance storage ring is Touschek lifetime Touschek lifetime is 10.2 h for 3.5 MV rf voltage. It is planned to operate the machine in top-up mode Zafer Nergiz, UPHUK-5, 07.09.2013 7

8. Nonlinear Beam Dynamics: Tracking According to MADX simulation the shape deformation of phase ellipse start x=0.015 m and y=0.01 m Phase space tracking in the horizontal and vertical plane at the center of straight section (1000 turn) Zafer Nergiz, UPHUK-5, 07.09.2013 8

9. Nonlinear Beam Dynamics: Dynamic aperture The dynamic aperture is the stable transverse area for the particle safely without getting defused or lost. a) Dynamical aperture for different momentum offset without magnet error (%3, %0, %-3) b) Effects of magnet errors to the dynamical aperture (1024 turn) Zafer Nergiz, UPHUK-5, 07.09.2013 9

10. Nonlinear Beam Dynamics: FMA Frequency Map Analysis (FMA) is a numerical method which is a possible way to understand the effect of resonance to the dynamic aperture. Diffusion rate of frequency map analyses from tracking results. (the colors are for log 10 (  x +  y )) (1024 turn). Zafer Nergiz, UPHUK-5, 07.09.2013 10

11. Synchrotron Radiation ParametersCU18SU15IU28U90 u (cm)1.81.52.89 NpNp 2506716031 Gap(mm)55.6735 K ymax 2.252.102.3510 L (m)4.481.0054.485.4 Photon Energy(keV)1.4-201.8-230.8-120.1-3 In-vacuum undulator (IU), Cryogenic permanent-magnet undulator (CU) Superconducting insertion devices (SU) Zafer Nergiz, UPHUK-5, 07.09.2013 11

12. Effects of the insertion devices Effects of the ID to the emittance and energy spreead investigated by the formula; where Effect of the CU18 to the emittance and energy spread Zafer Nergiz, UPHUK-5, 07.09.2013 12

13. Zero dispersion option In zero dispersion option the emittance is 1.18 nm rad Betax=17 m, Betay=7 m Other parameters approx same Zafer Nergiz, UPHUK-5, 07.09.2013 13

14. Middle dispersion option In middle dispersion option the emittance is 0.85 nm rad Betax=15 m, Betay=7 m, Dx=0.06 m Other parameters approx. same Zafer Nergiz, UPHUK-5, 07.09.2013 14

15. Ref: Nom Namkung IPAC2010 Presentation TAC-SI The Emittance and Circumference vs. Energy for The Different Light Sources Around the world Zafer Nergiz, UPHUK-5, 07.09.2013 15

16. Conclusions Low emittance storage ring is designed. It is reached to 0.67 nm rad emittance with 467 m ring circumference Nonlinear effects also investigated Different options are compared. It is planned to complete the machine report including main sub- systems up to mid of next year in paralel to the scientific case report. Thanks for your attentions Zafer Nergiz, UPHUK-5, 07.09.2013 16