1. Chen Yong 陈勇 Institute of High Energy Physics， CAS 2017 03 21
eXTP mission design coordination meeting
IHEP，Bejing
Overview of the SFA
Chen Yong 陈勇
Institute of High Energy Physics， CAS

3. SFA requirements
item
requirements
goal

4. SFA configuration thermal baffle mirror module X-ray baffle
electron deflector
detector

7. Main issues of the optics
Mass budget
Angular resolution
1 arcmin (HPD); 3 arcmin (W90)
Effective area optimization
A thin Carbon layer for nickel approach?

9. SDD module
Pre-amplify
SDD
With 100nm(TBC)

10. Particle Background Level Estimate using Geant4
ACD off : 9.3e-4 counts/s/keV/cm2
ACD on : 6.2e-4counts/s/keV/cm2
Charged particle background level

11. Thermal control of the detector
Helium pulse tube refrigerator

12. Main issues of the detector
Shielding
Need an active shielding?
Movable focal plane detector (SFA & PFA)?
Up to 13 SFA for timing and spectrum obs.
and up to 13 PFA for polarimetry obs.

13. Product tree

14. Thanks！

15. SFA requirements Item SFA (9 or 11modules) Focal length 5.25 m
Field of View
12′
Angular res.
<1′ (HPD), <3′ (W90)
Mirror Effective Collecting Area
(1 module)
>800 2 keV
>500 6 keV
Energy range
keV
Energy resolution
<180
Working temperature
20±2℃