Thermal Anneal Temperature Plots, MIPS Campaign B

Principal: Douglas Kelly
Deputy: Chad Engelbracht
Analyst:  Douglas Kelly
Last Updated:  9/11/03

Abstract

As preface to the scattered background test, a thermal anneal was performed in the Si startup task MIPS-900. A second anneal was performed in campaign B, as part of the Si shutdown task MIPS-990. The temperature plots from those two anneals are presented below. The instrument temperature was roughly 0.6K colder in campaign B than it had been in campaign A, and this affected the thermal conductance of the MIPS baseplate. As a result, the shapes and amplitudes of the temperature excursions of D70BaseTmp, D160BaseTmp, D160StimTmp, and CSMMTmp were noticeably different in campaign B than they had been in campaign A.

Analysis

The data from the thermal anneals comes out in binary format, with filename ce_year-DOYTHH.MM.SS.DDD_0_0_0 or ce_year-DOYTHH.MM.SS.DDD_1_0_0. I have developed IDL scripts for reading in the files, converting the telemetry into engineering units, and generating temperature plots. These files are available in the campaign A writeup on MIPS temperature plots. These routines also generate tables of minimum, maximum, and deltas for all ten temperatures/currents include in the diagnostic anneal script. The filename for this output file is filename.Temps.

Results

The following are binary data files, temperature plots and tables of temperatures for each of the anneals:

Conclusions

The MIPS thermal anneal heaters continue to behave nominally. There have been slight changes in the thermal conductances in the area covered by the MIPS temperature sensors since campaign A.