Analysis of startup, shutdown and middle sequences, Campaign 29 Abstract: This campaign is now using the new LH read-noise limit of 12.0 DN, which should apply retroactively to Campaign 25, the first campaign with the lower bias voltage. LH exceeded this lower limit in 4 of its 6 its pre-anneal tests, but passed in all post-anneal tests, for a total of 4 failures in 12 tests. The other modules behaved much as in the past, with both SL and LL exceeding their limits over half the time (7 and 8 of 12 times, respectively), and SH staying below its limit in every case. Analysts: Lei Hao & Greg Sloan Procedure version: 2.7 Campaign 29 , Startup, shutdown and middle anneal YEAR 2006 DOY 062 CE1 used for all data collection AORKEY = 16889344 for startup AORKEY = 16887552 for the first mid-campaign anneal sequence AORKEY = 16888064 for the second mid-campaign anneal sequence AORKEY = 16888320 for the third mid-campaign anneal sequence AORKEY = 16888576 for the forth mid-campaign anneal sequence AORKEY = 16889088 for shutdown Number of files = 64 for each No known errors. Steps 2 through 5 run OK. Unruly.pro results for startup (IRS_001): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.9 9.3 15.0 12.4 12.3 SH 8.8 7.3 7.5 15.0 12.9 12.9 LL 14.5 13.6 15.0 15.0 13.1 13.0 LH 12.0 12.7 11.5 15.0 12.8 12.9 Unruly.pro results for startup (IRS_002a): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.7 8.8 15.0 12.3 12.3 SH 8.8 7.7 8.0 15.0 12.8 12.9 LL 14.5 13.5 14.8 15.0 13.1 13.1 LH 12.0 12.7 11.8 15.0 13.0 12.9 Unruly.pro results for startup (IRS_002b): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.7 9.7 15.0 12.1 12.3 SH 8.8 6.9 7.4 15.0 12.8 12.8 LL 14.5 14.5 14.8 15.0 13.1 12.9 LH 12.0 12.0 11.7 15.0 12.9 12.8 Unruly.pro results for startup (IRS_002c): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.4 10.7 15.0 12.3 12.2 SH 8.8 6.8 8.1 15.0 12.9 13.7 LL 14.5 14.9 15.4 15.0 13.0 12.8 LH 12.0 11.9 11.9 15.0 12.8 12.9 Unruly.pro results for startup (IRS_002d): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.5 9.4 15.0 12.1 12.2 SH 8.8 7.0 7.4 15.0 13.0 12.9 LL 14.5 13.0 14.6 15.0 13.0 12.9 LH 12.0 12.6 11.4 15.0 12.9 12.8 Unruly.pro results for startup (IRS_003): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.4 9.4 15.0 12.3 12.4 SH 8.8 6.8 7.4 15.0 12.9 12.8 LL 14.5 15.4 13.3 15.0 13.0 13.0 LH 12.0 12.2 11.7 15.0 12.9 12.9 The analysis applied the PIRAT procedure unruly.pro to FITS files generated by MIPL. For SUR data, the quoted values are the standard deviation of the read noise map. For SRS data, these are the median of the standard deviation map. Comments: The best way to look at the result is to see the plot generated in IRS_001/rn.ps . All SRS results are within the limit. The values are also very stable, except the post- anneal set of the third middle sequence, when the SH SRS RN jumped to ~6% over the normal value. While this is still within the limit, the variation is generally within 1%, see below. The SUR results follow the patterns established in previous campaigns. SH is within its limit. SL exceeds its limit in all post-anneal tests and in one of the pre-anneal tests, giving 7 failures out of 12 tests. Similarly, LL exceeds its limit in 8 of 12 cases (5 of 6 post-anneal, 3 of 6 pre-anneal). The LH SURN limit has been reduced from 17.6 to 12.0 DN, and while LH is within this limit in all cases post-anneal, it exceeds it in all but one case pre-anneal. Changes in read noise between anneals and from startup to shutdown: SUR data SRS data 002b-pre/ 003-pre/ 003-pre/ 002b-pre/ 003-pre/ 003-pre/ Module 001-post 002b-post 001-post 001-post 002b-post 001-post SL 0.94 0.87 0.91 0.98 1.00 1.00 SH 0.92 0.91 0.90 0.99 1.00 1.00 LL 0.97 1.04 1.03 1.01 1.01 1.00 LH 1.05 1.04 1.06 1.00 1.01 1.00 Comments: The SRS stability continues to be good. The SUR stability is also good; almost all are within 10% except SL 003/002b, which shows a 13% change. Photoresponse stability (using the middle campaign IRS_002b): Module 002b-pre to 001-post 003-pre to 002b-post 003-pre to 001-post yellow red yellow red yellow red SL 3575 775 495 43 598 44 SH 0 0 0 0 0 0 LL 6153 51 4372 5 5012 6 LH 4 1 1 1 3 1 Comments: SH is still good, and LH is OK. The orders are clearly seen, even though they are not pushing the pixels over the yellow limit. LL orders are clearly seen as in previous campaigns. SL has latent images (like star clusters) in the PU camera in both the 003/002b and 003/001 comparisons. In the 002b/001 comparison, SL has the worst image, with the latent images of bright stars in the PU fields as well as illuminated areas at the corners of the PU fields. In SL1, there is also a pencil-shaped bright area, which could be the latent image of the order, even though this shape has never been seen before. To look at the saved image, plese see IRS_002b/camaign_29_anneal.ps The pixels exceeding the red limit in comparisons other than SL and LL 002b/001 (which gave too many to record): (coordinates) [times] LL: (52,4) [2], (118,73) [2], (46,99) [2], (87,99) [1], (23,119) [2], (103,32) [1] (35,82) [1] LH: (8,84) [1]