The films were all processed similarly using the DEF prescription of Henke. ![]() All the filters were mounted in front of the spectrometer and resided on a 25 - μ m-thick Be filter. In the latter case we used 6 μ m of Ti, and 50.6, 101.2, and 177.8 μ m of Mylar, as well as an open channel. In the former case we used simultaneously four filters at different places along the film, 6 and 12 μ m Fe and 6 and 12 μ m of Cr, as well as an open channel. We will only present the results from the crystals in the range of 5–13 and 2 – 4 keV. Four crystals were used: pentaerythritol (PET) for the range of 5 – 13 keV, potassium acid phthalate (KAP) for the range of 2 – 4 keV, PET for the range of 3.5 – 5.5 keV, and rubidium acid phthalate (RAP) for the range of 1.5 – 2.5 keV. In front of each film, we placed different wedged filters that attenuated the x rays and provided a fiducial for the wavelength calibration. High quality finished X-Ray film with a brilliant surface and pleasant blue tint. Unique high resistance to pressure, scratching and creasing. For exposure with lead screens, using either X-Ray or gamma rays. Designed for direct exposure or with lead screens. 7 The recorded x-ray pulse shape followed that of the rising part of the laser pulse with a slightly longer decay time than the laser pulse. Fine grain film with high contrast and high speed. In January 2005, we recorded the spectra from gold and iron targets, irradiated by the 1 ns long laser pulse of the Omega laser facility, 6 using a spectrometer with four bent crystals called the Henway spectrometer. It has also been used in microradiograpy of biological samples using 350 keV Faxitron sources. It is used mainly for high-energy x-ray radiography, but not intended for use below 10 keV. 4 The AGFA Structurix D7 film (now fro General Electric Inspection Technology, 50 Industrial Park Road, Lewinstown, PA 17044) is a relatively fast, double-side coated, very fine grain film with high contrast intended for industrial use with and without lead screens. 3 The present article describes tests comparing different films with DEF, especially the AGFA-D7 film, which has been used previously in recording diffraction spectra. 2 Previous efforts at looking for different films have also been superceded by the discontinuation of the tested AGFA and CEA-Reflex25 film. Some previous work measured the relative sensitivity of Biomax-MS, XAR, and other films. We have searched for a replacement sensitive to x rays with energies below 10 keV, where the film is most useful for imaging at the current ICF facilities. Aged DEF produces higher background, and may invalidate the absolute calibration. 1 Now, the film is being discontinued, and the remaining lots of it are getting old. The detector of choice for many years has been the direct exposure film (DEF), manufactured by Kodak (Eastman Kodak, Rochester, NY 14650), due to its relative sensitivity, availability, and its absolute calibration by Henke et al. The flexible connecting cable is heavy-duty and light weight.X-ray recording using film has been extensively used in the inertial confinement fusion (ICF) community for a long time. An on-board real time clock facilitates fully automatic warmup routines for optimized and timesaving tube conditioning. The performance of the X-ray tube and the high voltage generator is continuously monitored for protection and operational safety. The high voltage generator generates high-stability constant potential voltage at higher efficiency than conventional line frequency equipment. ![]() The air-cooled 200 kV/ 900 W end-grounded X-ray tube is thermally protected for extended life. The X-ray tube head consists of a sturdy metal-ceramic X-ray tube and high voltage generator integrated into a rugged compact housing. This means the ERESCO 42 MF4 is capable of penetrating 42 mm (1.65”) Fe with a 2.0 density after a ten-minute exposure using AGFA STRUCTURIX D7 film 700 mm (27.5”) FFD. GE Sensing & Inspection Technologies uses the number 42 to identify the superior penetration performance of its portable X-ray unit line. The ERESCO 42 MF4 is a 200 kV constant potential portable X-ray tube head using state of the art switching technology with high radiation output allowing shortest exposure times thereby increasing productivity.
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