SpectraCAM SPM: a camera system with high dynamic range for scientific and medical applications

Bhaskaran, Suraj; Baiko, D. A.; Lungu, G.; Pilon, Michael J.; VanGorden, S.

doi:10.1117/12.616134

Cited by 2 publications

(3 citation statements)

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“…This charge movement will induce a voltage change in the sense electrode proportional to the accumulated charge. Thereby the pixel can be read without clearing the accumulated charge [19,20].…”

Section: Charge Injection Devicesmentioning

confidence: 99%

“…This innovative camera has an intrinsically high dynamic range due to its unique pixel design, which is described in further detail in the next section. According to specifications, CID cameras are able to achieve dynamic ranges of up to 1 : 10 9 [19]. This high dynamic range enables the camera to monitor the beam halo and the beam core simultaneously.…”

Section: Introductionmentioning

confidence: 99%

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Flexible core masking technique for beam halo measurements with high dynamic range

Egberts

Welsch

2010

J. Inst.

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The majority of particles in a beam are located close to the beam axis, called the beam core. However, particles in the tail distribution of the transverse beam profile can never be completely avoided and are commonly referred to as beam halo. The light originating from or generated by the particle beam is often used for non-or least destructive beam profile measurements. Synchrotron radiation, optical transition, or diffraction radiation are examples of such measurements. The huge difference in particle density between the beam core and its halo, and therefore the huge intensity ratio of the emitted light is a major challenge in beam halo monitoring. In this contribution, results from test measurements using a flexible core masking technique are presented indicating way to overcome present limitations. This technique is well-known in e.g. astronomy, but since particle beams are not of constant shape in contrast to astronomical objects, a quickly adjustable mask generation process is required. The flexible core masking technique presented in this paper uses a micro mirror array to generate a mask based on an automated algorithm.

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Section: Charge Injection Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible core masking technique for beam halo measurements with high dynamic range

Egberts

Welsch

2010

J. Inst.

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“…These detectors have full wells capable of holding 10 9 electrons before affecting adjacent pixels. Charge injection devices, such as SpectraCam (Bhaskaran et al 2005), may also be able to simultaneously observe both bright and faint sources in the same field of view, without compromising the integrity of the detector, or the science image, as individual pixels are read out when the limit of the full well is approached. In addition to observations of active galaxies, such detectors will also be a valuable asset in the study of many other important astrophysical objects, and properties, that require a high dynamic range, e.g., the low end of the stellar initial mass function, supernova ejecta, stellar debris disk, and extrasolar planets.…”

Section: Integral Field Spectroscopymentioning

confidence: 99%

The Future of Direct Supermassive Black Hole Mass Estimates

Batcheldor¹,

Koekemoer²

2009

PUBL ASTRON SOC PAC

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(Abridged) The repeated discovery of supermassive black holes (SMBHs) at the centers of galactic bulges, and the discovery of relations between the SMBH mass (M) and the properties of these bulges, has been fundamental in directing our understanding of both galaxy and SMBH formation and evolution. However, there are still many questions surrounding the SMBH - galaxy relations. For example, are the scaling relations linear and constant throughout cosmic history, and do all SMBHs lie on the scaling relations? These questions can only be answered by further high quality direct M estimates from a wide range in redshift. In this paper we determine the observational requirements necessary to directly determine SMBH masses, across cosmological distances, using current M modeling techniques. We also discuss the SMBH detection abilities of future facilities. We find that if different M modeling techniques, using different spectral features, can be shown to be consistent, then both 30 m ground- and 16 m space-based telescopes will be able to sample M 1e9Msol across ~95% of cosmic history. However, we find that the abilities of ground-based telescopes critically depend on future advancements in adaptive optics systems; more limited AO systems will result in limited effective spatial resolutions, and forces observations towards the near-infrared where spectral features are weaker and more susceptible to sky features. Ground-based AO systems will always be constrained by relatively bright sky backgrounds and atmospheric transmission. The latter forces the use of multiple spectral features and dramatically impacts the SMBH detection efficiency. The most efficient way to advance our database of direct SMBH masses is therefore through the use of a large (16 m) space-based UVOIR telescope.Comment: PASP Accepte

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SpectraCAM SPM: a camera system with high dynamic range for scientific and medical applications

Cited by 2 publications

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Flexible core masking technique for beam halo measurements with high dynamic range

Flexible core masking technique for beam halo measurements with high dynamic range

The Future of Direct Supermassive Black Hole Mass Estimates

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