Characterization of an x-ray framing camera utilizing a charge coupled device or film as recording media

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1149250· OSTI ID:670277

Logory, L M; Farley, D R; Conder, A D; Belli, E A; Bell, P M; Miller, P L ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

A compact charge coupled device (CCD) camera system has been designed and characterized for use in the six inch manipulator (SIM) at the Nova laser facility. The camera system has been designed to directly replace the 35 mm film packages currently used in SIM-based x-ray imaging diagnostics. The unit{close_quote}s electronic package has been constructed for small size and high thermal conductivity which reduces the overall camera size and improves its performance when operated within the vacuum environment of the Nova target chamber. Measurements of the x-ray imager{close_quote}s contrast transfer function (CTF) were made under a variety of operating conditions on a static x-ray Manson source using both the CCD and Kodak T-Max 3200 film as recording media. The CTF data were converted to an equivalent modulation transfer function (MTF). The MTF plots show that the microchannel plate has a uniform response within our measurement accuracy along its strips. In a direction normal to the strip, however, the MTF is reduced due to the slant angle of the pores in the MCP. The measurements show that the CCD camera has a lower MTF response than T-MAX film for all spatial frequencies and configurations measured. However, data obtained from the film exhibited reciprocity failure and border effects that are not observed in the CCD data. Measurements indicate that the signal-to-noise ratio for the CCD data is four to six times larger than that obtained with film and higher photon flux levels were recorded. The CCD-based diagnostic offers immediate access to the data, improved dynamic range, and reduced turnaround time, while eliminating the need for film development, digitization, equipment, and personnel. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 670277
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 12 Vol. 69; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGE-COUPLED DEVICES
INERTIAL CONFINEMENT
LASER-PRODUCED PLASMA
MICROCHANNEL ELECTRON MULTIPLIERS
NOVA FACILITY
PLASMA DIAGNOSTICS
X-RAY EQUIPMENT