SLEGS Proto type on SINAP LINAC

1. SLEGS Proto type on SINAP LINAC Jin-Gen Chen& SLEGS Collaboration

2. Outline • A brief introduction of Shanghai Synchrotron Radiation Facility (SSRF) & Shanghai Laser Electron Gamma Source (SLEGS) • SINAP LINAC and Candidate lasers • The simulated results for backscattering • Progress in setup of proto type of SLEGS The 6th China Japan Nuclear Physics Symposium

3. SSRF Layout • 100MeV Linac injector • 3.5GeV Booster • 3.5GeV Storage Ring CharacteristicsofSSRF • Wide range of wave length • High power and high brightness • Small pulse length • High linear or circular polarization • High efficiency • High flexibility The 6th China Japan Nuclear Physics Symposium

4. SLEGS @ SSRF Physics Goals • Astro-nuclear physics (e.g. 3a process) • Spin-physics • Hadron & Nuclear physics • Photo-disintegration • (g,n) reactions • Nuclear Fluorescent • Application for material science • New photon sources with quantum technologies … The 6th China Japan Nuclear Physics Symposium

5. SLEGS @SSRF 1-25MeV, will be made by SINAP in 2008 at SSRF, China • rather flat energy distribution with small spreading • high linear- or circular-polarization The 6th China Japan Nuclear Physics Symposium

6. 100 MeV LINAC At present, SLEGS construction is under its primary stage. We now carrying out the construction of its proto type----a x-ray facility at 100 MeV LINAC. The 6th China Japan Nuclear Physics Symposium

7. Main features of LINAC- present • single bunch mode; • Energy: 100 [MeV]; • Energy resolution: 0.9%; • Pulse length: 1 [ns] (FWHM), 1.28 [A]; • 1s Normalized emittance: 107 (x), 137 (y) [pmmrad]; The 6th China Japan Nuclear Physics Symposium

8. Candidate lasers The 6th China Japan Nuclear Physics Symposium

9. 100 MeV LINAC vs. CO2 laser as a sample • CO2 laser: • l=10.64 [mm]  Infrared. • Waist radius: down to ~10 [mm] • Power of CW laser: up to ~1500 [W] • Well-developed and generally-used in industry. • Relatively low cost. The 6th China Japan Nuclear Physics Symposium

10. The differential flux changes sharply with the transform of interaction position if waist width is very small but becomes insensitive when waist width of laser is large enough. • Total luminous flux increases and then decreases with increase of waist width of laser. In addition, a longer wave length laser corresponds a larger total luminous flux at the same waist width of laser. The 6th China Japan Nuclear Physics Symposium

11. 反射镜 准直孔Ф0.5mm 约1m CO2激光入射窗 检验共轴 观察窗 CO2激光入射窗 观察窗 做一垂直标记 反射镜 反射镜 生成准直孔Ф0.5mm 准直孔Ф0.5mm 电子束流 准直光路 约1m 约1m CO2激光光路 The collimation of laser and electron 1. To give a collimation initialization via the transport of electron beam2. Co-axis of the collimated laser and the co2 laser 3. Readjustment of the co2 laser after the co2 being fixed at the LINAC4. Readjustment of the electron beam The 6th China Japan Nuclear Physics Symposium

12. Ideal results real results The 6th China Japan Nuclear Physics Symposium

13. The 6th China Japan Nuclear Physics Symposium

14. Estimation of background Background from synchrotron radiation Background from bremsstrahlung of electron and air The 6th China Japan Nuclear Physics Symposium

15. Other relevant equipments 1. Data acquirement system 2. Control system 3. Detector system 4. Chamber of target The 6th China Japan Nuclear Physics Symposium

16. Schedule The 6th China Japan Nuclear Physics Symposium

17. Budget The 6th China Japan Nuclear Physics Symposium

18. Thank you very much!