Development of Micro-Pore Optics at NAOC MPO research group X-ray Imaging Laboratory, NAOC Presented by Chen Zhang.

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Presentation transcript:

Development of Micro-Pore Optics at NAOC MPO research group X-ray Imaging Laboratory, NAOC Presented by Chen Zhang

Outline The MPO imaging technology development at NAOC – Ray-tracing software – LIGA manufacturing technology – Mounting and test facility

Micro-pole optics (MPO) Small FOV ( ～ 1 degree), fabricated with heavy materials Lobster-eye optics Wolter-I type optics Low weitgh Angel (1979) For large and homogeneous FOV coverage

MPO configurations Aperture size 280 mm Curvature 4000 mm; 1333 mm 2800 mm750 mm Focal length 1000 mm 1400 mm375 mm Focal plane: 20*20 mm 2 FOV: about 1 degree Focal plane: 19*19 mm 2 FOV: about 1 degree Focal plane: 140*140 mm 2 FOV: about 20 degree Wolter I K-B for narrow FOV Lobster-eye for wide FOV

Unified Geant4 model for MPO optics The ray-trace simulation based on Geant4 framework: the X-ray tracing toolbox Applied for MPO optics principle design as well as performance simulations Further integrated with background simulation and shielding design Applied to other kinds of optics Solid: G4 simulation ； dash: Q (authorized by LU) Deviation less than <1% Q G4

Can be used for Proton reflection simulations, even debris Can be used for charged particle interaction simulation

Optic assembly quality estimation from FEA data

25-30 degree temperature change

Finite Element Analysis Single pieces of glass under 5g gravitySingle pieces of glass piece temperature changes from degree, with fixed support A MPO unit with Ti structure with temperature changes from degree

The MPO Assembly The assembly is divided into 16 unit, each of which mounted on the main supporting grid Unit supporting grid: 2*2 MPO pieces each The MPO assembly piece Unit supporting grid Main supporting grid To simplify the fabrication and mounting process Each MPO unit almost identical To lower the mounting risk Finite element analysis for the MPO pieces?

The mounting procedure Auto-collimated telescope La se r Auto-collimated telescope La se r Unit Supporting grid standby Supporting feet standby Supporting feet pushed out and glue with MPO Adjust the MPO piece Unit supporting grid move close to the MPO and adjusted along the sphere

The mounting facility The laser beam and the auto-collimated telescope determine the optical axis of the facility. The MPO pieces are aligned along the laser, the unit supporter be rotated along the sphere surface of the same curvature as the MPO pieces The datum mirror

MPO manufacture with LIGA

LIGA for MPO Electron beam + LIGA + Charged particle beam polishing RMS<5 nm Normalized to relativity of perfect surface

The Silicon based detectors developed by IHEP Silicon Pin-Diode array Energy resolution: keV Timing resolution: 100 μs Working temperature: -50 degree Array size: 10*10, with 2 mm for each pixel Thickness: 300 or 500 μm 10*10 prototypeRead out electronics

Summary Micro-pore optics will be applied for EP and XTP mission MPO telescope is under development at NAOC: Simulation, design, FEA analysis, mounting under development.