Streak camera dynamic range optimization

Conference · Tue Sep 01 04:00:00 EDT 1987

OSTI ID:5887465

Wiedwald, J D; Lerche, R A

The LLNL optical streak camera is used by the Laser Fusion Program in a wide range of applications. Many of these applications require a large recorded dynamic range. Recent work has focused on maximizing the dynamic range of the streak camera recording system. For our streak cameras, image intensifier saturation limits the upper end of the dynamic range. We have developed procedures to set the image intensifier gain such that the system dynamic range is maximized. Specifically, the gain is set such that a single streak tube photoelectron is recorded with an exposure of about five times the recording system noise. This ensures detection of single photoelectrons, while not consuming intensifier or recording system dynamic range through excessive intensifier gain. The optimum intensifier gain has been determined for two types of film and for a lens-coupled CCD camera. We have determined that by recording the streak camera image with a CCD camera, the system is shot-noise limited up to the onset of image intensifier nonlinearity. When recording on film, the film determines the noise at high exposure levels. There is discussion of the effects of slit width and image intensifier saturation on dynamic range. 8 refs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5887465
• Report Number(s): UCRL-96518; CONF-8708110-24; ON: DE88001632
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
CAMERAS
CATHODES
ELECTRODES
FIBER OPTICS
IMAGE INTENSIFIERS
MEASURING INSTRUMENTS
OPTIMIZATION
PHOTOCATHODES
PHOTOGRAPHIC FILMS
PHOTOMULTIPLIERS
PHOTOTUBES
RADIATION DETECTORS
RECORDING SYSTEMS
SIGNAL-TO-NOISE RATIO
STREAK CAMERAS