PLATO Focal Plane Assemblies (FPA)

Roser Urquí

Centro de Astrobiología (CSIC-INTA)

PLATO Kick off meeting November 2010 Roser Urqui 2

FPA design present status FPA development planning

Drivers: High rigidity and mechanical stability Low mass (32+2 units are needed!) CCD temperature <-70 C, with passive cooling

PLATO Focal Plane Assemblies (FPA)

PLATO Kick off meeting November 2010

A preliminary design has been produced Design is mainly driven by interface constraints and budgets Design refinement still on-going

CCD (4x)

Thermal Strap (4x)

Flexi (4x)

Support Ring

Mask

Baseplate

Thermal StrapClamp (4x)

FPA design

3Roser Urqui

PLATO Kick off meeting November 2010

FPA design

4Roser Urqui

FPA

TOU

PLATO Kick off meeting November 2010

FPA design

5Roser Urqui

CCDs (detector side, 4x)

Thermal Straps (4x)

Support Ring

Mask

PLATO Kick off meeting November 2010

FPA design

6Roser Urqui

Baseplate

Thermal StrapClamps (4x)

CCD packages back side (4x)

PLATO Kick off meeting November 2010

FPA design

7Roser Urqui

Support Ring

Flexies (4x)

PLATO Kick off meeting November 2010

Current design is close to fulfill all requirements– First eigenfrequency 255 Hz (> 300 Hz)

• Margin still available to increase the frequency.

– Mass (including 4xCCDs - 180g each) 1.49 Kg (< 1.6 Kg)• If CCDs mass ~ 225 g, ~1.69 Kg

– CCD Temperature <-73 ºC (<-70 ºC)– Only NORMAL FPAs considered up to now.

Interfaces– CCD-FPA Interface has already been agreed– FPA-TOU I/F still open

• Current interface would impose a weird design. Trade off in progress.

FPA status

8Roser Urqui

PLATO Kick off meeting November 2010 Roser Urqui 9

Next steps

Design Refinement until late November– Further Mass reduction– Adapt to updated Requirements and Interfaces

Mock-Up Start of Manufacturing mid December– After CDR/MRR

Mock-Up Delivery mid March No delays are foreseen