THEMIS Instrument CDR 1 UCB, April 19-20, 2004

Flux Gate Magnetometer and BoomThermal

Christopher SmithThermal Engineer

csmith@ssl.berkeley.edu510-642-2461

THEMIS Instrument CDR 2 UCB, April 19-20, 2004

FGM

• Two carbon fiber tubes joined by an elbow hinge

• Frangibolt release on the base hinge

• Elbow hinge is capture only, no release

THEMIS Instrument CDR 3 UCB, April 19-20, 2004

FGM Geometry Model

FGM Model

Deployed

Stowed

THEMIS Instrument CDR 4 UCB, April 19-20, 2004

FGM / Map

MLI30% AZ2000IECW White Paint

70% VDA Tape

= 0.5 to 0.9

AZ2000IECW White Paint

Alodined Aluminum on Undersides

THEMIS Instrument CDR 5 UCB, April 19-20, 2004

FGM Model Inputs

• Optical materials– MLI– Vapor Deposited Aluminum Tape– AZ 2000 IECW White Paint– Alodined Aluminum

• Thermophysical materials– Aluminum, 6061– M55J– ULTEM– Dexter Hysol 9349

• Heaters– None in current model though provisions have been made for deployment heaters if needed and it

looks like we will need them.

• Conductors– Deck Hinge ULTEM isolators, 0.0078 < G < .0133 W/C each– Conductance through deck hinge, 0< G <.02 W/C– Conductance through adhesive to boom tube, 6.6 W/C– Conductance through adhesive at elbow hinge, 4.9 W/C– Conductance through elbow hinge, 0< G < 0.04 W/C– Conductance through adhesive to Sensor, 3.3 W/C– G10 Isolation mounts at FGM sensor, 0.01 W/C– Elbow Latch Tower ULTEM isolators, 0.0078 < G < .0133 W/C each

• Power Dissipation– 0 Watts Nominal

Elbow Hinge

THEMIS Instrument CDR 6 UCB, April 19-20, 2004

FGM Case Sets

• Identical case sets to the SCM

* UCB model eclipse time, boundary conditions do not yet include eclipse

THEMIS Instrument CDR 7 UCB, April 19-20, 2004

FGM Deployed – Nominal Plot

-100

-80

-60

-40

-20

0

20

50K 100K 150K 200K 250K 300K

FGM - 30% AZ 2000 70% VDA (04/14/04)SAA 103 Hot - SAA 90 Cold - SAA 77 Cold - SAA 77 Cold Low Power

Tem

pera

ture

Time

INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE SENSOR TOPDECK INNER BOOM OUTER BOOM

DECK HINGE ELBOW HINGE SENSOR TOPDECK INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE

SENSOR TOPDECK INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE SENSOR TOPDECK

THEMIS Instrument CDR 8 UCB, April 19-20, 2004

FGM Deployed – Top and Bottom to Sun Plot

-80

-60

-40

-20

0

20

40

60

80

100

40K 50K 60K 70K 80K 90K 100K 110K

FGM - 30% AZ 2000 70% VDA (04/14/04)SAA 0 Hot - SAA 180 Cold

Tem

pera

ture

Time

TOPDECK INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE SENSOR

TOPDECK INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE SENSOR

THEMIS Instrument CDR 9 UCB, April 19-20, 2004

FGM Stowed – Nominal Plots

-100

-80

-60

-40

-20

0

20

40

60

80

100

20K 40K 60K 80K 100K 120K 140K 160K 180K 200K

FGM Stowed - 30% AZ 2000 70% VDA (04/14/04)SAA 103 Hot - SAA 77 Cold - SAA 0 Hot - SAA 180 Cold

Tem

pera

ture

Time

TOPDECK INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE SENSOR TOPDECK

INNER BOOM OUTER BOOM DECK HINGE ELBOW HINGE SENSOR TOPDECK INNER BOOM

OUTER BOOM DECK HINGE ELBOW HINGE SENSOR TOPDECK INNER BOOM OUTER BOOM

DECK HINGE ELBOW HINGE SENSOR FGM FRANGIBOLT SCM FRANGIBOLT

THEMIS Instrument CDR 10 UCB, April 19-20, 2004

FGM Results Table

THEMIS Instrument CDR 11 UCB, April 19-20, 2004

FGM DeployedColdest Heat Map

THEMIS Instrument CDR 12 UCB, April 19-20, 2004

FGM DeployedHot Temperature Map

THEMIS Instrument CDR 13 UCB, April 19-20, 2004

FGM StowedColdest Temperature Map

THEMIS Instrument CDR 14 UCB, April 19-20, 2004

FGM StowedHottest Temperature Map

THEMIS Instrument CDR 15 UCB, April 19-20, 2004

Search Coil Magnetometer and BoomThermal

Christopher SmithThermal Engineer

csmith@ssl.berkeley.edu510-642-2461

THEMIS Instrument CDR 16 UCB, April 19-20, 2004

SCM Model

• Carbon Fiber boom mounted on the top deck

• Frangibolt activated deployment

• Sensor mounted in PEEK structure

THEMIS Instrument CDR 17 UCB, April 19-20, 2004

SCM Geometry Model

SCM Model

Deployed

Stowed

THEMIS Instrument CDR 18 UCB, April 19-20, 2004

SCM / Map

MLI

30% AZ2000IECW White Paint

70% VDA Tape

= 0.5 to 0.9

AZ2000IECW White Paint

Alodined Aluminum on Undersides

THEMIS Instrument CDR 19 UCB, April 19-20, 2004

SCM Model Inputs

• Optical materials– MLI– Vapor Deposited Aluminum Tape– AZ 2000 IECW White Paint– Alodined Aluminum

• Thermophysical materials– Aluminum, 6061– M55J– ULTEM– Dexter Hysol 9349

• Heaters– None in current model though provisions have been made for deployment heaters if needed and it

looks like we will need them.

• Conductors– Deck Hinge ULTEM isolators, 0.0078 < G < .0133 W/C each– Conductance through deck hinge, 0< G <.02 W/C– Conductance through adhesive to boom tube, 6.6 W/C– Conductance through adhesive to Sensor, 3.3 W/C– PEEK isolation of SCM sensor, 0.01 W/C– Release Tower ULTEM isolators, 0.0078 < G < .0133 W/C each

• Power Dissipation– 0 Watts Nominal

Deck Hinge

THEMIS Instrument CDR 20 UCB, April 19-20, 2004

SCM Case Sets

THEMIS Instrument CDR 21 UCB, April 19-20, 2004

SCM Deployed – Nominal Plot

Deployed SCM Plot, Nominal Case Sets

-80

-70

-60

-50

-40

-30

-20

-10

0

10

20

30

50K 100K 150K 200K 250K 300K

SCM - 30% AZ 2000 70% VDA (04/14/04)SAA 103 Hot - SAA 90 Cold - SAA 77 Cold - SAA 77 Cold Low Power

Tem

pera

ture

Time

BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK

BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK

THEMIS Instrument CDR 22 UCB, April 19-20, 2004

SCM Deployed – Top and Bottom to Sun Plot

Deployed SCM Plot, Top and Bottom to Sun

-80

-60

-40

-20

0

20

40

60

80

100

40K 50K 60K 70K 80K 90K 100K 110K

SCM - 30% AZ 2000 70% VDA (04/12/04)SAA 0 Hot - SAA 180 Cold

Tem

pera

ture

Time

BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK

THEMIS Instrument CDR 23 UCB, April 19-20, 2004

SCM Stowed – Nominal Plots

-100

-80

-60

-40

-20

0

20

40

60

80

100

20K 40K 60K 80K 100K 120K 140K 160K 180K 200K

SCM Stowed - 30% AZ 2000 70% VDA (04/14/04)SAA 103 Hot - SAA 77 Cold Low Power - SAA 0 Hot - SAA 180 Cold

Tem

pera

ture

Time

BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK BOOM INNER BOOM OUTER SENSOR

DECK HINGE TOPDECK BOOM INNER BOOM OUTER SENSOR DECK HINGE TOPDECK BOOM INNER

BOOM OUTER SENSOR DECK HINGE TOPDECK FGM FRANGIBOLT SCM FRANGIBOLT

THEMIS Instrument CDR 24 UCB, April 19-20, 2004

SCM PlotCross Tube Temp Differentials

Cross-Tube Temperature Differentials

THEMIS Instrument CDR 25 UCB, April 19-20, 2004

SCM Plot Axial Temperature Differentials

Axial Temperature Differentials

THEMIS Instrument CDR 26 UCB, April 19-20, 2004

SCM Results Table

THEMIS Instrument CDR 27 UCB, April 19-20, 2004

SCM DeployedColdest Heat Map

THEMIS Instrument CDR 28 UCB, April 19-20, 2004

SCM DeployedHot Temperature Map

THEMIS Instrument CDR 29 UCB, April 19-20, 2004

SCM StowedColdest Temperature Map

THEMIS Instrument CDR 30 UCB, April 19-20, 2004

SCM StowedHottest Temperature Map