SPP FIELDS V1234 Thermal PSR Gayle K. Martin May 26, 2017

Contents The Post PER Road… Thermal Compliance Thermal Environmental Testing Thermal Vacuum Test Summary Thermal Balance Test Thermal Model Path Forward

We passed PER

But there was still a long and arduous road… We all experienced THIS moment Yet we persevered!

Thermal Compliance Action Items, Deviations Waivers Documents No thermal action items from IPER No open thermal actions or deviations Waivers Analyitical margin (not submitted) Omission of survival cycle for thermal cycle testing Documents iPER slides Thermal vaccum test procedure Thermal balance test procedure Thermal design summary Thermal model Bakeout plan Requirements SPP EDTRD SPP CCP FIELDS Bake-out

Thermal Environmental Testing Thermal cycling 5/13/2017 to 5/20/2017 6 Operational cycles +90°C to -77°C Hot bake out & hot survival No cold survival Thermal Balance 5/21/2017 to 5/25/2017 4 Balance plateaus 2 Heater verification balances Future Testing APL-ORNL optical tests of Nb C103 lot 2 APL-ORNL other testing TBD Previous testing: Reference document presented to APL 5/3/2017 Optical properties (2012) Choke thermal design (2012) Outgassing NbC103 (2012) Material compatibility (2013-2014) Thermal distortion (2013) Electrical verification (2014) Shield & stub thermal design (2014) Hinge deployment (2014-2015) Thermal design (2015) ETU thermal balance (2015) Preamp qualification (2016) ITVT (2017)

Thermal Vac Cycling V1234

Thermal Vacuum Test Set-up The TV test was complete at UCB/SSL in the Bayside chamber Test dates 5/13/2017 to 5/20/2017 Test set-up There were three temperature zones for the TV test (main shroud, end shrouds 7 baseplate) Fully assembled flight units V1234 The flight units were bolted to a mounting plate (shelf) then bolted to the chamber baseplate The harness rested on top shelf The heaters were connected for thermostat and heater performance verification Back shroud Main shroud Baseplate TV set-up in the Bayside chamber

Thermal Vacuum Test Set-up All 4 units mounted on shelf Harness on shelf top

Thermal Vacuum Test Set-up Selfie time!

Thermal Vacuum Test Set-up Terminator box V2 flight unit QA approved!!

Thermal Vacuum Test Set-up Thermocouples were mounted along the flight unit and instruments internal to the chamber to verify temperatures during thermal cycling The thermocouples were electrically isolated with Kapton tape and thermally coupled with aluminum tape The internal thermistor recorded that the temperatures stabilized during instrument operation (not available during survival) TC # Location  1 Door Shroud  2 Main Shroud  3 Baseplate 4 Back Shroud 5 V2 arm 6 V3 arm 7 V4 arm 8 V1 PinPuller 9 V2 PinPuller 10 V3 PinPuller 11 V4 PinPuller 12 V1 arm 13 V1 Preamp radiator 14 V2 Preamp radiator 15 V3 Preamp radiator 16 V4 Preamp radiator Arm Radiator PinPuller

Thermal Vacuum Test Results 6 Operational cycles +90°C to -77°C Hot bake out & hot survival Same temperature as operational cases Left to 90°C overnight to meet 48hr bakeout requirement Total hours >>48 hours No cold survival: cold survival at cold operational temperatures Hot and cold turn-on at first and last hot & cold cycles CPT at every cycle Successful cold & hot deployment Instrument functionals were complete Pre-test functional Hot and cold operation CPTs (all op cycles) Post-test functional Test parameters as indicated in PER were met The transition rate of the instrument did not to exceed 3°C per minute Soak was achieved at a minimum of four hour at case temperatures with a change in temperature of ±1°C Thermostat and heater performance was verified after cold soaks 3 and 6

Thermal Vacuum Test Results Acceptance temperature margins Flight allowable limits were tested at all soaks No non-conformances or differences from PER during test Measured test margins vs. design estimates: MEP tested to 10°C beyond predicts No rework/replacement, or changes to test plan since IPER Electrical performance (CPT) summarized in Sasha’s slides Hot deploy Final Bake & TQCM Warm-up Chamber break Cold deploy

Thermal Balance SN005

Thermal Balance Test Set-up

Thermal Balance Test Set-up

Thermal Balance Test Data The thermal balance test (4 balance cases & 2 heater verification soaks) completed Preliminary results: Most of the critical components are within 3°C of the predicts (as required) There are some components that are out of predicts Reasons for the discrepancy The part of the test set-up (aluminum stand-offs), MLI, & associated radiative view factor were not properly modeled Minor errors from conversion from the flight model to the test model were not debugged Optimization of optical properties Current work Detailed review of test set-up, specifically the radiative view in question Model correlation effort

Thermal Model The recommendations provided by Shawn from the last model view (3/2017) were incorporated Design updated that differed from design and flight unit were included

Path Forward Conclusion Model correlation Recommendation V1234 successfully complete all thermal testing The thermal model is under review Captive blankets are under construction for flight unit integration Model correlation Finalize the model correlation Final flight predicts Final heater power duty cycle predicts (transient) Recommendation Despite the differences between the test model and resultant temperatures, the source of the discrepancies have been identified Confident that the thermal model to date is accurate It is recommended to proceed as planned

It takes a Village… Abiad Jose Brent Keith Chris S1 Paul Chris S2 Peter David Sasha Greg Steve Helen Yvette John & al Jorg