Contact Stansberry - "; echo " there is a problem w/ your write-up.\n"; return ; } $row = mysql_fetch_array($result); $title = $row["title"]; $princ = $row["principal"]; $deputy= $row["deputy"]; $campn0 = $row["campn0"]; $aorkeys = $row["aorkeys"]; // get real name of principal, deputies $princ = ioc_get_person($princ); $princ = $princ[0]; $deps = explode(",",$deputy); foreach ($deps as $depty) { $depty = trim($depty); $depty = ioc_get_person($depty); $depty = $depty[0]; $depty = explode(",",$depty); $depty = $depty[0]; // last names only $deplist[] = $depty; } $deplist = implode(", ", $deplist); $caid = sprintf("%03d",$caid); $file = "mips-".$caid.$campn.".analysis.php"; // END PHP. ?> <? echo "MIPS-$caid, Campaign $campn IOC/SV Analysis"; ?>

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Task Outcome Summary

Abstract

This task has four parts to it. First, a set of 10 3s SUR DCEs is collected with the same pointing that will be used later for the Vrst optimization. The goal is to get a before and after thermal anneal comparison of the responsivity of the 24um array. Second, diagnostic data is collected during 160um, 70um, and 24um thermal anneals. As written right now, the 160um and 70um anneals are performed in separate diagnostic cycles so no direct comparison can be made to the other thermal anneals being performed during IOC. These separate anneal sequences will soon be replaced with a single diagnostic cycle. The third MIPS-992 activity is a Vrst optimization on the Ge arrays. The final activity in MIPS-992 is the state transitions Observe --> Ready --> Operate (i.e. MIPS off), and then Operate --> Boot --> Off. The successful completion of the transition was confirmed by the lack of any unexpected errors during the state transition. The thermal data from this task were nominal and are presented in the metatask mips-2050. The Vrst optimization script was constructed incorrectly so no Vrst optimization was possible.

Analysis

We converted the diagnostic data from the thermal anneal into temperatures and generated temperature plots. These data are compared to the temperature curves from previous anneals. These data are presented in the metatask writeup mips-2050.

We compared the 24um SUR data taken before and after the thermal anneal to look for changes in array behavior. The items of interest were the noise levels on the detectors and the responsivity patterns.

A Vrst analysis was performed on the Vrst data, but unfortunately we discovered that the bias voltages were not set to 0V before the start of the exposure sequence. As a result, the bias voltages were being adjusted between -5 mV and 5 mV relative to their nominal values (30 mV at 160um, 40 mV at 70um) rather than between absolute biases of -5 mV and 5 mV. This invalidated the optimization.


Results

Temperature Plots from Anneal

The temperature behavior during the anneal was nominal. The temperature plots can be found in the writeup for MIPS-2050.

24 µm Responsivity

No star was present in the field during the running of MIPS-992. The sky brightnesses are presented below. I excluded all bias boost DCEs since they give false slope values. One post-anneal DCE had an anomalously high median, probably due to cosmic rays. 
filename:  mips_IER_7407616_pht_A24_Pukn_pos-1_3s.red.fits
DCE Meansky   SkyDev    Medsky
 2    503.6     566.5     56.21
 3    507.3     571.4     57.91
 4    507.8     571.9     57.63
 5    508.2     571.4     57.05
 6    508.3     571.7     57.03
 7    508.7     572.2     57.19
 8    509.1     573.      57.59
 9    509.      572.9     57.41
10    509.      572.5     57.14
--- Thermal Anneal happened here ---
12    503.8     564.4     57.29
14    504.3     564.9     57.4
16    504.6     565.2     57.48    
18    504.7     565.4     57.39     
20    504.9     565.9     57.71
22    505.      565.9     57.49
24    504.9     565.7     57.45
26    505.7     568.8     60.13
28    505.2     566.      57.56
30    504.9     565.6     57.45
32    504.9     565.7     57.39
34    504.8     565.6     57.48
36    505.1      566.     57.58
The median sky fluxes are plotted below:

There are no obvious changes in the sky brightnesses following the thermal anneal. Any changes are smaller than the DCE to DCE variation.


Conclusions

This campaign is about 7 hours long. There are no obvious changes in array behavior due to cosmic rays that can be seen in this data set.

Output and Deliverable Products

None.

Actions Following Analysis

None.