Multi-level parallel clocking of CCDs for: improving charge transfer efficiency, clearing persistence, clocked anti-blooming, and generating low-noise backgrounds for pumping
Multi-level parallel clocking of CCDs for: improving charge transfer efficiency, clearing persistence, clocked anti-blooming, and generating low-noise backgrounds for pumping
复制标题
CCD 的多级并行时钟用于：提高电荷传输效率、清除持久性、时钟防晕以及生成用于泵浦的低噪声背景
DOI：
10.1117/12.2024839
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Murray N
中科院分区：
文献类型：
--
作者：
Murray N
一个多层次的时钟计划已被开发，以提高并行CTE的四相CCD通过抑制位于势垒相位下的传输通道中的陷阱的影响，通过反转这些阶段之一，在整个传输序列。同时，很明显，在欧几里得维斯检测器中光学过载之后的余辉将导致在随后的行和帧中释放不期望的信号，并且将需要用于冲洗该信号的合适方案。小心地，在多级转移序列期间的负偏置电极可以被制成逐行地钉扎整个表面，并且消除有问题的电荷。这个过程也可以扩展到集成过程中使用，以显著减少探测器的不可用区域，正如多年前开发的时钟抗晕技术一样;但是，随着现代CCD的四相电极架构，我们可以采取预防措施，以避免科学框架内的电荷泵和时钟诱导电荷问题。时钟感应充电并不都是坏的！我们还建议使用轨道上的陷阱泵欧几里得维斯提供校准输入的地基校正算法，这样一个统一的，低噪声的背景是必需的。可以操纵时钟感应电荷以向成像阵列提供非常合适的低信号和噪声背景。在这里，我们描述和目前的结果多级并行时钟方案中使用的四相CCD，可以提高性能的高精度天文应用，如欧几里得维斯。
A multi-level clocking scheme has been developed to improve the parallel CTE of four-phase CCDs by suppressing the effects of traps located in the transport channel under barrier phases by inverting one of these phases throughout the transfer sequence. In parallel it was apparent that persistence following optical overload in Euclid VIS detectors would lead to undesirable signal released in subsequent rows and frames and that a suitable scheme for flushing this signal would be required. With care, the negatively biased electrodes during the multi-level transfer sequence can be made to pin the entire surface, row-by-row, and annihilate the problematic charges. This process can also be extended for use during integration to significantly reduce the unusable area of the detector, as per the clocked anti-blooming techniques developed many years ago; however, with the four-phase electrodes architecture of modern CCDs, we can take precautionary measures to avoid the problem of charge pumping and clock induced charge within the science frames. Clock induced charge is not all bad! We also propose the use of on-orbit trap-pumping for Euclid VIS to provide calibration input to ground based correction algorithms and as such a uniform, low noise background is require. Clock induced charge can be manipulated to provide a very suitable, low signal and noise background to the imaging array. Here we describe and present results of multi-level parallel clocking schemes for use in four-phase CCDs that could improve performance of high precision astronomy applications such as Euclid VIS.
通过“泵浦”陷阱缓解全帧 CCD 应用中辐射引起的电荷转移效率低下
影响因子：
3.1
作者：
N. Murray;A. Holland;J. Gow;David J. Hall;J. Tutt;D. Burt;J. Endicott
通讯作者：
J. Endicott
用于 ESA Euclid M 级任务的电荷耦合器件
DOI：
10.1117/12.926323
发表时间：
2012
期刊：
--
影响因子：
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作者：
Endicott J
通讯作者：
Endicott J