PLATO Focal Plane Assemblies (FPA)

Roser Urquí

Centro de Astrobiología (CSIC-INTA )

PLATO Focal Plane Assemblies (FPA)

  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 Kick off meeting November 2010 Roser Urqui 2

FPA design

   A preliminary design has been produced Design is mainly driven by interface constraints and budgets Design refinement still on-going Thermal Strap (4x) Mask CCD (4x) Flexi (4x) Baseplate Thermal Strap Clamp (4x) Support Ring PLATO Kick off meeting November 2010 Roser Urqui 3

FPA design

FPA PLATO Kick off meeting November 2010 TOU Roser Urqui 4

FPA design

Thermal Straps (4x) CCDs (detector side, 4x) Mask PLATO Kick off meeting November 2010 Support Ring Roser Urqui 5

FPA design

Baseplate CCD packages back side (4x) PLATO Kick off meeting November 2010 Thermal Strap Clamps (4x) Roser Urqui 6

FPA design

Support Ring PLATO Kick off meeting November 2010 Flexies (4x) Roser Urqui 7

FPA status

 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) •

If CCDs mass ~ 225 g,

– CCD Temperature 1.49 Kg (< 1.6 Kg)

~1.69 Kg

< 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.

PLATO Kick off meeting November 2010 Roser Urqui 8

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 PLATO Kick off meeting November 2010 Roser Urqui 9