1. X-ray Timing and Polarization mission & instrumentation DONG Yongwei Center for Particle Astrophysics Institute of High Energy Physics, Chinese Academy of Sciences

2. XTP Scientific objectives  Scientific Problems  One Singularity (BH),  Two Stars (NS and magnetar),  Three Extremes (gravity, density, magnetism)  The effective area of focusing telescope has been confirmed to be the breakthrough capability of the merged mission.  The unique polarization measurement capability has been selected as the distinguishing feature. XTP will open a new window using its powerful capability of polarization observation.

3. XTP payload configuration 3 FL: 4.5m, FoV 16’,0.5~15keV 5000cm 2 @2~6keV FL: 5.5m, FoV 16’,1~30keV 4000cm 2 @2~6keV, 300cm 2 @30keV 1°×1°,8-100 keV 2500 cm 2

4. Summary of focal payload HFALFA Optics Mirror Quasi-Wolter I, nested,Multi-layer Shell substrate ： Al foil or slumped glass Quasi-Wolter I, nested Shell substrate ： Al foil or slumped glass Focal length5.5m4.5m FOV16’ HPD2’ Energy range1~30keV0.5~15keV Effective Area 4000cm2@2~6keV 300cm2@30keV 5000cm2@2~6keV Units 5(3GEM-TPC+CZT, 2SDD/DEPFET) 10 Focal plane detector GEM-TPC(top)+CZT(focal point): CZT(1mm*1mm*1mm) ： 16*16 SPD(or DEPFET): 10×10 pixels, 1mm×1mm×0.5mm SDD(or DEPFET): 10×10 pixels 1mm×1mm×0.5mm Energy resolution CZT ： 600 eV@5.9 keV SDD/DEPFET ： 150eV@5.9keV 150eV@5.9keV

5.  Nested quasi-wolter I type  Mirror length 100 mm  Thickness 0.2 mm  F/D ~ 10  Inner: W/Si; outer Ir  Slumped Glass/ Al foil X-ray optics

6. Focal plane detectors  SDD/SPD, or DePFET(MPE) 7 SDD detectors. FWHM=160eV@5.9keVFWHM=160eV@5.9keV at room temp. 100-pixel Si-PIN detectors. FWHM=1.1keV@60keVFWHM=1.1keV@60keV at room temp.

7. Polarization meas. using GEM-TPC  Cross-section of photoelectric effect

8. Transmissive design of GEM-TPC @Tsinghua University Focal plane Focused beam

9. High energy X-ray Collimating Array Sketch map of One HCA module CZT detector is applied. The collimator is made using Lithographie - Galanoformung - Abformung (LIGA) technique. Nickel, hole size 170*170μm, Grid thickness 30μm, Height 0.6mm

10. Wide Field Camera  The WFC is to monitor the transient X-ray sources and to localize them with an accuracy of 5 arcmin.  With the slew of platform, other instruments will be guided to make follow-up observations.

11. XTP area and background XTP effective area

12. Launcher  LM-3C, 2 boosters. 12

13. LM-3C launch capability  The launch capability of the LM-3C for LEO mission into a 200 km circular orbit with an inclination of 28.5 deg is 9,100 kg.  550km & 28.5 deg ~ 6 t.  Altitude easy to be changed. Inclination angle NOT! 13 LM-3C launch capa. for GTO orbit

14. XTP orbit  Basic para.  Altitude 550 km  Inclination angle 28 degree (14 degree as backup). It depends on the particle background, particle flux, SAA crossing time, earth occulation, ground stations

15. Miscellaneous  Mass: <3200 kg (satellite); ~1100kg (payload)  Power: 1300W (platform); 1000W(payload)  Launch time: ~2020  Lifetime: 5 years (expected, 10 years)  XTP has been selected as a background project by the Strategic Pioneer Program (SPP) on Space Science of the Chinese Academy of Sciences.  X band data: rely satellite or international collaboration (if the inclination angle is too small)  Focal plane detectors & collimating detectors Thanks!