ACIS Instrument Support - Monthly Progress Report for September 2009

1.  ACIS Characterization

1.1 Characterize and model radiation damage in ACIS CCDs

  ...  Continued work on irradiation/annealing tests done at GSFC
in 2005.  Finalizing analysis.

1.3 Monitor scientific on-orbit performance of ACIS

  ...  Continued monitoring of ACIS CTI, gain, trailing pixel 
pulseheight, detector efficiency, corner pixel distribution, spectral 
line centroid and width, and focal plane temperature.  Updated 
monitoring web pages.  (http://space.mit.edu/~cgrant/monitor.html)

  ...  Continued more detailed examination of focal plane
temperatures.  Updated monitoring web page to include all
spacecraft events that effect temperature.  Provided temperature
data for quarterly and FDB presentations.  Included discussion
of temperatures in poster for Chandra Calibration Review.

  ...  Presented ACIS status at Chandra Quarterly Review.
Included plots and statistics on focal plane temperatures.

  ...  Collected new raw frames and updated monitoring web page.
(http://space.mit.edu/~fergason/acis/raw.html)

  ...  Presented poster at the Chandra Calibration Review 
on the ACIS instrument team monitoring effort.

2.  Engineering

2.1 Instrument hardware engineering performance

  ...  Continue to monitor long term ACIS instrument performance. 
ACIS hardware continues to operate nominally.

2.2 Flight software maintenance

  ...  ECO review of flight software standard patch release D.
Fixed typos in documentation and is ready for implementation.
This version includes two new standard patches, badpix and
buscrash2, which address software problem reports 141 and 142.

2.3 Instrument science performance

  ...  Participated in radiation working group telecon.  Presented
ACIS CTI data history, specifically looking for changes since
the perigee backoff time was reduced.

  ...  Participated in monthly ACIS operations meeting.  Discussed
ACIS focal plane temperatures and the review of the flight software 
update.

  ...  Provided focal plane temperature data and statistics for 
FDB presentation about SIM FA6 heater.  FDB presentation delayed
until Oct 8.

  ...  Continued daily quick-look processing of ACIS telemetry and
maintained Web interface to ACIS real-time data.

  ...  Continued to publish the "annotated DOT" timeline reports.


3.  CXC Support

3.1 Provide user support

  ...  Updated ACIS memo listing calibration ObsIDs and 
observation characteristics (ACIS Memo #165).

3.2 Provide data analysis support

  ...  Tested temperature-dependent CTI correction tool for future
inclusion as user-contributed software.  Results seem promising.
Co-author on talk presented at the Chandra Calibration Review.

  ...  Participated in CXC Cal/Ops modeling discussion group.  Discussed
proposed update to the ACIS contamination model and plans for the upcoming
Chandra Calibration Review.  Continuing discussion over email.  Answered
questions about ACIS door opening and early mission activities.

  ...  Continued to maintain ACIS calibration database of ground 
and flight data products.

4.  OCC Support

4.1 Use of MIT/ACIS EGSE at OCC

  ...  Continued support and maintenance of ACIS EGSE software and
hardware at the OCC.


Outreach:

none this month

all recent memos available at http://space.mit.edu/ACIS/iacis.html