Catherine's ACIS pages

• Charge transfer inefficiency (CTI) and particle background
• Trailing pixel
• Corner pixel distribution
• Overclock levels
• Focal plane temperature
• Detector gain
• Spectral line centroid and width
• Contamination
• Detection Efficiency

• Images of recent raw frames (Bev LaMarr)

• Removing the CTI/Background Anti-Correlation (11/12/10)
• Old version of ACIS CTI background detrending (5/5/10)
• Analysis of Alternating Exposure Mode Data (even older detrending work) (04/02/04)
• Preliminary Analysis of Oct 2003 CTI change (02/28/05)

• ACIS Monitoring
  • "The Effects of Orbital Environment on X-ray CCD Performance, poster presented at the 14th HEAD meeting, August 2014
  • "Fifteen years of the Advanced CCD Imaging Spectrometer", Proc. SPIE 9144, July 2014
  • "The Effects of Orbital Environment on X-ray CCD Performance", poster presented at 224th AAS meeting, June 2014
  • "CTI evolution and its impact on spectral resolution in different orbital environments", poster presented at HEAD, September 2011
  • "CTI evolution and its impact on spectral resolution in different orbital environments", poster presented at 4th Suzaku Science Conference, July 2011
  • "The ACIS Instrument on the Chandra X-ray Observatory: Instrument Status and Performance Evolution", poster presented at 218th AAS meeting, May 2011
  • "ACIS after ten years: Detector performance then, now and into the next decade", poster presented at Chandra Calibration Review, September 2009
  • "ACIS: Instrument Status and Performance Evolution", presentation for Chandra Calibration Workshop, October 2005
  • "Long-term trends in radiation damage of Chandra X-ray CCDs", Proc. SPIE 5898, August 2005
  • "Evolution of ACIS Performance", presentation for Chandra Calibration Workshop, October 2004
  • "Time dependence of ACIS contamination", presentation for Chandra Calibration Workshop, October 2003
  • "Four Years of ACIS: Monitoring Detector Performance", poster presented at Four Years of Chandra Symposium, September 2003
  • "Evolution of ACIS Response", presentation for Chandra Calibration Workshop, November 2002
  • "The temporal characteristics of the Chandra X-ray Observatory high energy particle background", presented at X-rays at Sharp Focus: Chandra Science Symposium conference, July 2001, ASP Conf. Ser. 262, p. 401
  • "Monitoring the Charge Transfer Inefficiency of ACIS and the Impact of the Varying Cosmic-Ray Background", poster presented at HEAD meeting, November 2000
• ACIS as a particle radiation monitor
  • "Using ACIS on the Chandra X-ray Observatory as a particle radiation monitor", poster presented at HEAD meeting, April 2013
  • "Using ACIS on the Chandra X-ray Observatory as a particle radiation monitor II", Proc. SPIE 8443, July 2012
  • "Using the Chandra ACIS x-ray imager as a background particle flux detector", Proc. SPIE 8443, July 2012 (Peter Ford)
  • "Using ACIS on the Chandra X-ray Observatory as a particle radiation monitor", Proc. SPIE 7732, June 2010
• ACIS CTI Correction
  • "Developing contributed software to correct for the temperature dependence of ACIS CTI", presentation for Chandra Calibration Review, September 2009
  • "Correcting for the temperature dependence of ACIS CTI", presentation for Chandra Calibration Review, October 2007
  • "Temperature dependence of charge transfer inefficiency in Chandra X-ray CCDs", Proc. SPIE 6276, June 2006
  • "A charge transfer inefficiency correction model for the Chandra Advanced CCD Imaging Spectrometer", Proc. SPIE 5501, June 2004
  • "Sacrificial charge and the spectral resolution performance of the Chandra Advanced CCD Imaging Spectrometer", Proc. SPIE 4851, June 2002
  • "Sacrificial Charge and the Spectral Resolution Performance of ACIS CCDs", poster presented at HEAD meeting, April 2002
• Miscellaneous
  • "Physics of reverse annealing in high-resisitivity Chandra ACIS CCDs", Proc. SPIE 7021, June 2008

• Grant, C.E. et al. 2004, "A charge transfer inefficiency correction model for the Chandra Advanced CCD Imaging Spectrometer", Proc. SPIE, 5501, 177 (astro-ph/0407199) | ADS |

• ACIS CTI Correction Approaches (26 Apr 2001; revised 30 Apr 2001)
  Catherine Grant, Leisa Townsley & the ACIS IPI Team | Postscript | PDF |

• ACIS CTI Correction Report (22 Mar 2001)
  Bautz, Ford, Grant, Kissel, LaMarr & Prigozhin | Postscript (6.2 MB) | Gzip'ed Postscript (1.8 MB) | PDF (2.8 MB) |

• Related Penn State Memos
  
  • Townsley & Broos, "The PSU CTI Corrector: New results for i3, -110C" (20 Nov 2000)
  • Townsley & Broos, "Modeling Charge Transfer Inefficiency in ACIS" (5 Apr 2001) (broken link)
  • Broos & Townsley, "Notes on RMF Generation" (27 Apr 2001) (broken link)

• ACIS CTI vs temperature (10/07/05)
• S4 Streaks: Correlated with Particle Background (01/04/02)
• Quick look analysis of squeegee modes (09/07/00)
• Analysis of First Squeegee Mode Test On-Board (04/21/00) - see also ACIS Memos #183 and #185 below
• Analysis of Squeegee Mode Data (Lab) (03/21/00)
• Rejected Flight Grades: Raw Mode Analysis (03/21/00)
• ACIS CTI Analysis (-110 C) (02/22/00)
• Effect of CTI on Quantum Efficiency (Superceded by ACIS Memo #182)

• #207 (01/30/07) Consequences of a future unprotected radiation belt transit by ACIS
• #205 (05/20/04) Reproducibility of soft-proton damage in laboratory irradiations of ACIS CCDs
• #204 (06/13/03) Dependence of ACIS performance on small temperature changes
• #200 (04/19/02) Preliminary Sacrificial Charge Correction
• #198 (04/03/02) Estimating the long time constant
• #197 (03/20/02) Flight experience with bakeouts
• #195 (02/12/01) Long-term stability of ACIS gain
• #194 (01/12/01) ACIS background flares and Chandra orbital position
• #192 (10/13/00) Column to column variations in squeegee mode
• #186 (05/22/00) Preliminary Analysis of Squeegee IV: 16-row squeegee preceded by full frame flush
• #185 (05/04/00) Analysis of Squeegee Mode Test with Corner-Pixel Bias Correction
• #183 (04/25/00) Preliminary Analysis of ACIS Squeegee Mode Test
• #182 (03/08/00) Quantum efficiency of ground irradiated device as a function of row and energy
• #177 (12/03/99) Time constants of electron traps in the CCD channel. Part 2: Sacrificial charge analysis
• #174 (10/13/99) Variation of CTI across the ACIS focal plane
• #173 (10/13/99) Longer Term Stability of ACIS CTI
• #169 (09/20/99) Time History of CTI for S2 and S3
• #168 (09/19/99) Temperature Dependence of CTI for S2 and S3
• #164 (09/13/99) Gain Change in ACIS CCDs during OAC Phase 2

• Fred Baganoff's ACIS page
• Internal MIT ACIS page