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CCD Issues Working Group

  • Members (based on attendance at April 2010 meeting)
    Catherine Grant (chair, Chandra/ACIS), Andy Beardmore (Swift/XRT), Dick Edgar (Chandra/ACIS), Eric Miller (Suzaku/XIS), Paul Plucinsky (Chandra/ACIS), Steve Sembay (XMM/EPIC-MOS), Michael Smith (XMM/EPIC-pn), Mutsumi Sugizaki (MAXI/SSC), Masahiro Tsujimoto (Suzaku/XIS), Claudio Pagini (Swift/XRT), Kip Kuntz, Jon Gelbord (Swift/XRT), Norbert Schultz (Chandra/ACIS), Kenji Hamaguchi (Suzaku/XIS), Vinay Kashyap (Chandra), Jenny Posson-Brown (Chandra/ACIS), Diab Jerius (Chandra)
  • Missions
    Chandra-ACIS, XMM EPIC-pn, XMM EPIC-MOS, Swift XRT, Suzaku XIS, MAXI SSC
  • Purpose (from April 2010 meeting)
    • Provide a forum for cross-mission discussion and comparison of CCD-specific modeling and calibration issues
    • Produce documents (SPIE level) discussing these comparisons, pros/cons of each approach
    • Produce a document (A&A level?) discussing lessons learned and best practices for CCD-based instruments
  • Short-term Goals (from April 2010 meeting)
    • Provide structure for organizing/sharing information (this wiki)
      • Library of links to key papers and memos, indexed by mission, topic (i.e. CTI monitoring, correction, etc.)
    • Establish three sub-groups for detailed study of topics of special interest
      • Residuals around Si-K edge (Miller)
      • CTI correction, energy dependence of CTI (Beardmore)
      • Challenges in calibrating timing modes (Tsujimoto)
      • Charge Injection?
  • CCD Reference Library

    ACIS Papers and Resources

The new CXC Calibration has many good references and links to presentations at Calibration Workshops. It's not officially
live yet, but can be found here:
http://asc.harvard.edu/cal/Acis/detailed_info_new.html

ACIS CTI monitoring: 

(CTI, trailing charge, correcting CTI for bkg and temperature)

LaMarr, et al. 2008, Proc SPIE, 7011, 66  PDF
Front- and back-illuminated x-ray CCD performance in low- and high-Earth orbit: performance trends of Suzaku XIS and Chandra ACIS detectors
http://adsabs.harvard.edu/abs/2008SPIE.7011E..66L

Grant, et al. 2005, Proc. SPIE, 5898  PDF
Long-term trends in radiation damage of Chandra X-ray CCDs
http://adsabs.harvard.edu/abs/2005SPIE.5898..201G
(The poster outside CEG's office updates some of this.)

The continually updated monitoring web pages:
http://space.mit.edu/~cgrant/monitor.html

ACIS CTI Correction:

The PSU CTI correction algorithm (short version):
Townsley, et al. 2000, ApJ, 543, L139
Mitigating charge transfer inefficiency in the Chandra X-ray Observatory Advanced CCD Imaging Spectrometer
http://adsabs.harvard.edu/abs/2000ApJ...534L.139T

The PSU CTI correction algorithm (long version):
Townsley, et al. 2002, NIMPA, 486, 751
Modeling charge transfer inefficiency in the Chandra Advanced CCD Imaging Spectrometer
http://adsabs.harvard.edu/abs/2002NIMPA.486..751T

CEG CTI correction algorithm (this is what acis_process_events uses):
Grant, et al. 2004, Proc. SPIE, 5501
A charge transfer inefficiency correction model for the Chandra X-ray CCDs
http://adsabs.harvard.edu/abs/2004SPIE.5501..177G

CTI temperature dependence (no correction algorithm yet):
Grant, et al. 2006, Proc. SPIE 6276
Temperature dependence of charge transfer inefficiency in Chandra X-ray CCDs
http://adsabs.harvard.edu/abs/2006SPIE.6276E..48G

CTI temperature dependence correction:
Grant, 2007, presentation at Chandra Cal Workshop
Correcting for the temperature dependence of ACIS charge transfer inefficency
http://cxc.harvard.edu/ccr/proceedings/07_proc/presentations/grant/

CTI correction with sacrificial charge: (not implemented)
Grant, et al. 2003, Proc. SPIE 4851
Sacrificial charge and the spectral resolution performance of the Chandra Advanced CCD Imaging Spectrometer
http://adsabs.harvard.edu/abs/2003SPIE.4851..140G

ACIS Background:

Grant et al. 2002, ASP Conf. Proc., 262
The Temporal Characteristics of the Chandra X-ray Observatory High Energy Particle Background
http://adsabs.harvard.edu/abs/2002ASPC..262..401G

Markevitch et al. 2003, ApJ, 583, 70
Chandra Spectra of the Soft X-ray Diffuse Background
http://adsabs.harvard.edu/abs/2003ApJ...583...70M

Chandra radiation environment:

Grant, Lamarr, Bautz, O'Dell, 2010, Proc. SPIE, 7732
Using ACIS on the Chandra X-ray Observatory as a particle radiation monitor
http://adsabs.harvard.edu/abs/2010SPIE.7732E..80G

O'Dell, et al. 2008, Proc. SPIE, 6686
Managing radiation degradation of CCDs on the Chandra X-ray Observatory III
http://adsabs.harvard.edu/abs/2007SPIE.6686E...3O

O'Dell, et al. 2005, Proc. SPIE, 5898
Managing radiation degradation of the CCDs on the Chandra X-ray Observatory II
http://adsabs.harvard.edu/abs/2005SPIE.5898..212O

O'Dell, et al. 2003, Proc. SPIE, 4851
Managing radiation degradation of the CCDs on the Chandra X-ray Observatory
http://adsabs.harvard.edu/abs/2003SPIE.4851...77O

(and others, but these are the main ones)

Prigozhin, et al. 2000, Proc SPIE, 4012, 720
Radiation damage in the Chandra x-ray CCDs
http://adsabs.harvard.edu/abs/2000SPIE.4012..720P

Prigozhin, et al. 2000, Proc SPIE, 4140, 123
Characterization of the radiation damage in the Chandra x-ray CCDs
http://adsabs.harvard.edu/abs/2000SPIE.4140..123P



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