TY - GEN
T1 - Improved spatial resolution in thick, fully-depleted CCDs with enhanced red sensitivity
AU - Fairfield, Jessamyn A.
PY - 2005
Y1 - 2005
N2 - The point spread function (PSF) is an important measure of spatial resolution in CCDs for point-like objects, since it can affect use in imaging and spectroscopic applications. We present new data and theoretical developments in the study of lateral charge diffusion in thick, fully-depleted charge-coupled devices (CCDs) developed at Lawrence Berkeley National Laboratory (LBNL). Because they are fully depleted, the LBNL devices have no field-free region, and diffusion can be controlled through the application of an external bias voltage. We give results for a 3512×3512 format, 10.5 μm pixel back-illuminated p-channel CCD developed for the SuperNova/ Acceleration Probe (SNAP), a proposed satellite-based experiment designed to study dark energy. The PSF was measured at substrate bias voltages between 3 V and 115 V. At a bias voltage of 115V, we measure an rms diffusion of 3.7 ± 0.2 μm. Lateral charge diffusion in LBNL CCDs is thus expected to meet the SNAP requirements.
AB - The point spread function (PSF) is an important measure of spatial resolution in CCDs for point-like objects, since it can affect use in imaging and spectroscopic applications. We present new data and theoretical developments in the study of lateral charge diffusion in thick, fully-depleted charge-coupled devices (CCDs) developed at Lawrence Berkeley National Laboratory (LBNL). Because they are fully depleted, the LBNL devices have no field-free region, and diffusion can be controlled through the application of an external bias voltage. We give results for a 3512×3512 format, 10.5 μm pixel back-illuminated p-channel CCD developed for the SuperNova/ Acceleration Probe (SNAP), a proposed satellite-based experiment designed to study dark energy. The PSF was measured at substrate bias voltages between 3 V and 115 V. At a bias voltage of 115V, we measure an rms diffusion of 3.7 ± 0.2 μm. Lateral charge diffusion in LBNL CCDs is thus expected to meet the SNAP requirements.
UR - https://www.scopus.com/pages/publications/33846562878
U2 - 10.1109/NSSMIC.2005.1596437
DO - 10.1109/NSSMIC.2005.1596437
M3 - Conference Publication
SN - 0780392213
SN - 9780780392212
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 1072
EP - 1076
BT - 2005 IEEE Nuclear Science Symposium Conference Record -Nuclear Science Symposium and Medical Imaging Conference
T2 - Nuclear Science Symposium Conference Record, 2005 IEEE
Y2 - 23 October 2005 through 29 October 2005
ER -