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New inspection system for high energy digital radiography rotor (In French, English abstract)
N DT Abstracts processing. It was found that automated Kodak SR film processing exhibited a detector sensitivity twice as great as that obtained with manual processing. The corresponding neutron fluence parameter is 1.15 x 10sup(9)n cmsap(-2) for D = 2.0 using the SR/Gd combination and automated processing.
This contribution reports work performed at two different neutron radioscopy systems NRS, at the High Flux Reactor (HFR) Petten and at the Forschungs-Reaktor Munchen (FRM-1) Munich. Both NRS are based on the same principle. They are utilising ZnS(Ag)+sup(6)LiF scintillation screens (type NE426), surface mirrors for image deflection and electronic cameras with a 512 by 512 pixel resolution. The first part of the contribution addresses an extension of a low light camera with an optical zoom, the second part relates to the development of a high performance cooled CCD camera and imaging system. Both studies are of a complementing nature.
Murata, Y.; Mochiki, K.; Taguchi, A.; Suzuoki, Z., Takaura, K.; Ohkuma, T. Latitude expansion by electronic image processing 58198
Neutron Radiography (4) Proceedings o f the 4th World Conference, San Francisco, California (United States), 10-16 May 1992. pp. 503-510. Edited by J.P. Barton. Gordon and Breach Science Publishers (1993) ISBN 2-88124-624-9. A method to expand the dynamic range of neutron radiographic images is proposed. Several electronic images obtained with different illuminance levels are synthesized into a single radiographic image with wider latitude than those of each image. Optical ND filters are used to control the illuminance from a scintillation screen. A pseudocolor display is adopted for good discriminating capability.
57221 Boulding, N.J.; Kruip, M.J.; Cox, M.P.; Plummer, H.; Dale, K.; Allen, D.A. Initial results from the neutron demonstrator facility at O x f o r d 6th European Conference on Non Destructive Testing, Nice (France), 24- 28 Oct. 1994. Vol. 2, pp. 795-799. E C N D T (1994) The NDF is equipped with: The Oxford 12MeV superconducting cyclotron; A beryllium target assembly; A moderator/collimator/shield assembly with variable inserts capable of generating a diverging beam of L:D ratios 50 to 300; Various sample manipulating systems; A 450ram x 350mm scintillator conversion screen based on sup(6)Li/ZnS material; Low light cameras, including a Burle 16mm Silicon Intensified Tube (SIT) camera with 576 x 530 pixels resolution and an Astromed CCD camera with 1200 x 1400 pixel resolution; and Image acquisition and processing on a workstation. The full system is known as Neu-Sight.
Casali, F.; Chirco, P.; Festinesi, A.; Garagnani, A.; Partemi, P.; Rosa, R. A system for neutron radiography with a cooled CCD camera 58195
Neutron Radiography (4) Proceedings o f the 4th World Conference, San Francisco, California (United States), 10-16 May 1992. pp. 481-486. Edited by J.P. Barton. Gordon and Breach Science Publishers (1993) ISBN 2-88124-624-9. The experimental tests are carried out mainly at the 1 MW TRICA reactor of C.R.E. of ENEA in Rome; the detection system comprises a scintillator screen (either NE 426, which has a much higher light yield, or NE 905, which may offer a better spatial resolution) and a cooled CCD camera coupled by a simple light guide. The final image is then displayed on the screen of the PC connected to the CCD camera and may be read in the computer in order to perform some image processing and analysis techniques. Results of current measurements performed over simple specimens in order to quantify the performances of the experimental equipment are shown.
57214 Gagelin, J.J. New inspection system for high energy digital radiography r o t o r (In French, English abstract) 6th European Conference on Non Destructive Testing, Nice (France), 24- 28 Oct. 1994. Vol. 1. pp. 673-674. ECNDT (1994) This paper describes a new high energy digital radiography system based on Xrays to visible photons conversion. Such a system is usually made of: an Xray-to-light luminescent converter screen scanned with a video camera through a 45sup(o) mirror; a frame grabber is used for on-line digitization, frame addition and image processing.
Lange, H.1.; Le(flang, H.P.; Markgraf, J.F.W.; Rausch, C.; Schillinger, B. N e u t r o n radioscopy using zoom capability with (1) zoom 56956
Chuang, C.Y.;Chia, W.M. Development of neutron radiography in zero power reactor 58179
capability a n d (2) high detectivity Commission of the European Communities, EN-38466-ORA (1994) This paper reports work performed at two different neutron radioscopy systems (NRS), at the High Flux Reactor (HFR), Petten and at the Forschungs-Reaktor Munchen (FRM-1), Munich. Both work on the same principle, using electronic cameras with 512 by 512 pixels resolution and ZnS(Ag)+sup(6)LiF scintillation screens. The first part of the paper describes an extension of a low light camera with an optical zoom; the second part relates to the development of a high performance cooled CCD camera and imaging system.
Neutron Radiography (4) Proceedings o f the 4th World Conference, San Francisco, California (United States), 10-16 May 1992. pp. 375-382. Edited by J.P. Barton. Gordon and Breach Science Publishers (1993) ISBN 2-88124-624-9. The NR facility in ZPRL has been modified and reinstalled. Because the neutron flux level in ZPRL is rather low, the geometry and material of collimator has been deliberately designed and remodeled. In addition, direct exposure method of 25 lain gadolinium screen converter and Kodak SR film was selected to examine an object. The result showed that the original facility has been upgraded to category I, according to ASTM E545-81. Some industrial neutron radiographic applications have been successfully performed. These successful cases include the detecting of residual ceramic core material of gas-cooled turbine blade, the explosive inspection of Flexible Confine Detonation Charge in ejector of fighter, the inspection of the uniformity and continuity of Shield Mild Detonation Cord and the inspection of packing.
56594 Drake, S.G.; Wrigglesworth, KJ. An inspection system British Patent No. 2,270,825 (23 Mar. 1994) A radioscopic inspection system which comprises an X-ray sensitive phosphorescent screen photodiode array, and optical means for transferring an image from the screen on to the photodiode array. The optical means comprises a lens system and a reflector between the screen and the lens system. The inspection system provides X-ray images in near real time of a quality at least equivalent to conventional X-ray film techniques. The photodiode array is shielded from scattered X-rays by a lead-glass element and cooled by a cooling circuit.
57450 Chandrasekharan, K.N.; Patil, B.P.; Ghosh, J.K. Continuous motion radiography: system evaluation using modulation transfer function Insight, Vol. 37, No. 2, pp. 101-104 (Feb. 1995) Modulation Transfer Function (MTF) was used for evaluating a continuous motion radiography system employed for the non-destructive evaluation (NDE) of nuclear fuel plates. MTF curves were developed for conventional and continuous motion radiography techniques using an X- ray test pattern. Limiting resolution and movement unsharpness values were obtained for screen/film and non-screen/film combinations. The loss of resolution and MTF due to motion was evaluated.
Lawrence, P.F.; Burch, S.F.; Drake, S. Simultaneous multi-slice computer tomography of aeroengine t u r b i n e blades 56287
ASNT 1994 Fall Conference and Quality Testing Show, Atlanta, Georgia (United States), 19-23 Sep. 1994. pp. 29-31. ASNT (1994) ISBN 1-57117- 002-2 The flexibility of CT/RTR systems has been demonstrated on x-ray energies from 160 KeV microfocal to 6 MeV, and on a range of detectors covering image intensifiers to bare fluorescent screens. The use of these detector systems enables multi-slice CT to be obtained from a single component rotation, making a considerable saving on acquisition time. The example of using the technique for aeroengine turbine blade inspection is presented here.
57225 Lange, H.I.; Leeflang, H.P.; Markgra3'; J.F.W.; Rausch, Chr.; Schillinger, B.; Neutron radioscopy using electronic cameras with (1) zoom capability and (2) high detectivity 6th European Conference on Non Destructive Testing, Nice (France), 24- 28 Oct. 1994. Vol. 2, pp. 817-821. ECNDT (1994)
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This contribution reports work performed at two different neutron radioscopy systems NRS, at the High Flux Reactor (HFR) Petten and at the Forschungs-Reaktor Munchen (FRM-1) Munich. Both NRS are based on the same principle. They are utilising ZnS(Ag)+sup(6)LiF scintillation screens (type NE426), surface mirrors for image deflection and electronic cameras with a 512 by 512 pixel resolution. The first part of the contribution addresses an extension of a low light camera with an optical zoom, the second part relates to the development of a high performance cooled CCD camera and imaging system. Both studies are of a complementing nature.
Murata, Y.; Mochiki, K.; Taguchi, A.; Suzuoki, Z., Takaura, K.; Ohkuma, T. Latitude expansion by electronic image processing 58198
Neutron Radiography (4) Proceedings o f the 4th World Conference, San Francisco, California (United States), 10-16 May 1992. pp. 503-510. Edited by J.P. Barton. Gordon and Breach Science Publishers (1993) ISBN 2-88124-624-9. A method to expand the dynamic range of neutron radiographic images is proposed. Several electronic images obtained with different illuminance levels are synthesized into a single radiographic image with wider latitude than those of each image. Optical ND filters are used to control the illuminance from a scintillation screen. A pseudocolor display is adopted for good discriminating capability.
57221 Boulding, N.J.; Kruip, M.J.; Cox, M.P.; Plummer, H.; Dale, K.; Allen, D.A. Initial results from the neutron demonstrator facility at O x f o r d 6th European Conference on Non Destructive Testing, Nice (France), 24- 28 Oct. 1994. Vol. 2, pp. 795-799. E C N D T (1994) The NDF is equipped with: The Oxford 12MeV superconducting cyclotron; A beryllium target assembly; A moderator/collimator/shield assembly with variable inserts capable of generating a diverging beam of L:D ratios 50 to 300; Various sample manipulating systems; A 450ram x 350mm scintillator conversion screen based on sup(6)Li/ZnS material; Low light cameras, including a Burle 16mm Silicon Intensified Tube (SIT) camera with 576 x 530 pixels resolution and an Astromed CCD camera with 1200 x 1400 pixel resolution; and Image acquisition and processing on a workstation. The full system is known as Neu-Sight.
Casali, F.; Chirco, P.; Festinesi, A.; Garagnani, A.; Partemi, P.; Rosa, R. A system for neutron radiography with a cooled CCD camera 58195
Neutron Radiography (4) Proceedings o f the 4th World Conference, San Francisco, California (United States), 10-16 May 1992. pp. 481-486. Edited by J.P. Barton. Gordon and Breach Science Publishers (1993) ISBN 2-88124-624-9. The experimental tests are carried out mainly at the 1 MW TRICA reactor of C.R.E. of ENEA in Rome; the detection system comprises a scintillator screen (either NE 426, which has a much higher light yield, or NE 905, which may offer a better spatial resolution) and a cooled CCD camera coupled by a simple light guide. The final image is then displayed on the screen of the PC connected to the CCD camera and may be read in the computer in order to perform some image processing and analysis techniques. Results of current measurements performed over simple specimens in order to quantify the performances of the experimental equipment are shown.
57214 Gagelin, J.J. New inspection system for high energy digital radiography r o t o r (In French, English abstract) 6th European Conference on Non Destructive Testing, Nice (France), 24- 28 Oct. 1994. Vol. 1. pp. 673-674. ECNDT (1994) This paper describes a new high energy digital radiography system based on Xrays to visible photons conversion. Such a system is usually made of: an Xray-to-light luminescent converter screen scanned with a video camera through a 45sup(o) mirror; a frame grabber is used for on-line digitization, frame addition and image processing.
Lange, H.1.; Le(flang, H.P.; Markgraf, J.F.W.; Rausch, C.; Schillinger, B. N e u t r o n radioscopy using zoom capability with (1) zoom 56956
Chuang, C.Y.;Chia, W.M. Development of neutron radiography in zero power reactor 58179
capability a n d (2) high detectivity Commission of the European Communities, EN-38466-ORA (1994) This paper reports work performed at two different neutron radioscopy systems (NRS), at the High Flux Reactor (HFR), Petten and at the Forschungs-Reaktor Munchen (FRM-1), Munich. Both work on the same principle, using electronic cameras with 512 by 512 pixels resolution and ZnS(Ag)+sup(6)LiF scintillation screens. The first part of the paper describes an extension of a low light camera with an optical zoom; the second part relates to the development of a high performance cooled CCD camera and imaging system.
Neutron Radiography (4) Proceedings o f the 4th World Conference, San Francisco, California (United States), 10-16 May 1992. pp. 375-382. Edited by J.P. Barton. Gordon and Breach Science Publishers (1993) ISBN 2-88124-624-9. The NR facility in ZPRL has been modified and reinstalled. Because the neutron flux level in ZPRL is rather low, the geometry and material of collimator has been deliberately designed and remodeled. In addition, direct exposure method of 25 lain gadolinium screen converter and Kodak SR film was selected to examine an object. The result showed that the original facility has been upgraded to category I, according to ASTM E545-81. Some industrial neutron radiographic applications have been successfully performed. These successful cases include the detecting of residual ceramic core material of gas-cooled turbine blade, the explosive inspection of Flexible Confine Detonation Charge in ejector of fighter, the inspection of the uniformity and continuity of Shield Mild Detonation Cord and the inspection of packing.
56594 Drake, S.G.; Wrigglesworth, KJ. An inspection system British Patent No. 2,270,825 (23 Mar. 1994) A radioscopic inspection system which comprises an X-ray sensitive phosphorescent screen photodiode array, and optical means for transferring an image from the screen on to the photodiode array. The optical means comprises a lens system and a reflector between the screen and the lens system. The inspection system provides X-ray images in near real time of a quality at least equivalent to conventional X-ray film techniques. The photodiode array is shielded from scattered X-rays by a lead-glass element and cooled by a cooling circuit.
57450 Chandrasekharan, K.N.; Patil, B.P.; Ghosh, J.K. Continuous motion radiography: system evaluation using modulation transfer function Insight, Vol. 37, No. 2, pp. 101-104 (Feb. 1995) Modulation Transfer Function (MTF) was used for evaluating a continuous motion radiography system employed for the non-destructive evaluation (NDE) of nuclear fuel plates. MTF curves were developed for conventional and continuous motion radiography techniques using an X- ray test pattern. Limiting resolution and movement unsharpness values were obtained for screen/film and non-screen/film combinations. The loss of resolution and MTF due to motion was evaluated.
Lawrence, P.F.; Burch, S.F.; Drake, S. Simultaneous multi-slice computer tomography of aeroengine t u r b i n e blades 56287
ASNT 1994 Fall Conference and Quality Testing Show, Atlanta, Georgia (United States), 19-23 Sep. 1994. pp. 29-31. ASNT (1994) ISBN 1-57117- 002-2 The flexibility of CT/RTR systems has been demonstrated on x-ray energies from 160 KeV microfocal to 6 MeV, and on a range of detectors covering image intensifiers to bare fluorescent screens. The use of these detector systems enables multi-slice CT to be obtained from a single component rotation, making a considerable saving on acquisition time. The example of using the technique for aeroengine turbine blade inspection is presented here.
57225 Lange, H.I.; Leeflang, H.P.; Markgra3'; J.F.W.; Rausch, Chr.; Schillinger, B.; Neutron radioscopy using electronic cameras with (1) zoom capability and (2) high detectivity 6th European Conference on Non Destructive Testing, Nice (France), 24- 28 Oct. 1994. Vol. 2, pp. 817-821. ECNDT (1994)
220