IEEE Nuclear Science Symposium Conference Record, 2005最新文献_第8页

Design and testing of a high pressure gas target for fast neutron resonance radiography 快中子共振射线照相用高压气体靶的设计与测试

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-09 DOI: 10.1109/NSSMIC.2005.1596261

W. Raas, B. Blackburn, E. Boyd, J. Hall, G. Kohse, R. Lanza, B. Rusnak, J. Watterson

{"title":"Design and testing of a high pressure gas target for fast neutron resonance radiography","authors":"W. Raas, B. Blackburn, E. Boyd, J. Hall, G. Kohse, R. Lanza, B. Rusnak, J. Watterson","doi":"10.1109/NSSMIC.2005.1596261","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596261","url":null,"abstract":"A high pressure deuterium gas target has been designed to provide high-flux fast neutrons using the D(d,n)3He reaction for use as a neutron source. The deuterium gas cell holds 4 atm D2 gas at 298 K and is projected to tolerate a beam current of ~50 muA of 3.0 MeV deuterons for 8 hours of continuous use. The high-pressure gas cell is designed to provide a fast neutron flux on the order of 105 n/cm2-s at one meter. Measurements of gamma ray production from deuterium impingement have shown tungsten to generate the fewest gamma rays; the primary components of the gas target have been constructed out of tungsten to decrease the number of gamma rays. To accommodate the high gas pressure, thin foil tungsten windows have been structurally reinforced with a tungsten support allowing for more than 60% beam transmission while greatly increasing the structural reliability of the thin windows. Extensive simulation and experimental testing have demonstrated the heating tolerances of the gas target thin windows and have shown that the peak temperature of the thin foils does not exceed 600degC, while the edges of the foil do not exceed 100degC, well within the limits of the foil windows and the gas sealing structures","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121540084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Radiation imaging of dry-storage casks for nuclear fuel 核燃料干贮存桶的辐射成像

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-08 DOI: 10.1109/NSSMIC.2005.1596457

K. Ziock, G. Caffrey, A. Lebrun, L. Forman, P. Vanier, J. Wharton

引用次数: 8

First-generation hybrid compact Compton imager 第一代混合紧凑型康普顿成像仪

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-07 DOI: 10.1109/NSSMIC.2005.1596260

M. Cunningham, M. Burks, D. Chivers, C. Cork, L. Fabris, D. Gunter, T. Krings, D. Lange, E. Hull, L. Mihailescu, K. Nelson, T. Niedermayr, D. Protic, J. Valentine, K. Vetter, D. Wright

引用次数: 15

Extruded plastic scintillator for MINERvA 挤出塑料闪烁体MINERvA

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-01 DOI: 10.1109/NSSMIC.2005.1596558

A. Pla-Dalmau, A. Bross, V. Rykalin, B. Wood

引用次数: 22

Evaluation of 5 mm-thick CdTe detectors from the company Acrorad acorad公司5mm厚CdTe探测器的评估

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-01 DOI: 10.1109/NSSMIC.2005.1596292

A. Garson, I. Jung, J. Perkins, H. Krawczynski

{"title":"Evaluation of 5 mm-thick CdTe detectors from the company Acrorad","authors":"A. Garson, I. Jung, J. Perkins, H. Krawczynski","doi":"10.1109/NSSMIC.2005.1596292","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596292","url":null,"abstract":"Using 2/spl times/2/spl times/0.5 cm/sup 3/ cadmium telluride (CdTe) substrates from the company Acrorad, we have fabricated detectors with planar cathode contacts and 8/spl times/8 anode pixels. We investigate the I-V characteristics and energy resolution of the detectors for different contact materials and surface treatments. After biasing the detectors for a certain time, the dark currents increase dramatically. Our studies show that the time before breakdown decreases for higher detector temperatures and for higher applied bias voltages. We obtained the best results with a Pt cathode contact and In anode pixels when we heat the detector to 90/spl deg/C for 30 minutes prior to depositing the In contacts. Flood-illuminating the detector with 662 keV X-rays, we measured the pulse length distribution and derived an electron mobility of /spl sim/860 cm/sup 2/ V/sup -1/s/sup -1/. We show that the energy resolution can be improved by correcting the anode signals for the depth of the primary interaction. Operated at a temperature of -40/spl deg/C and a cathode bias voltage of -500 V, the best pixels of the best detector achieved full width half maximum (FWHM) energy resolutions of 8 keV (6.4%) and 23 keV (3.4%) at 122 keV and 662 keV, respectively.","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122546865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Single event effects and their mitigation for the Collider Detector at Fermilab 费米实验室对撞机探测器的单事件效应及其缓解

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-01 DOI: 10.1109/NSSMIC.2005.1596446

R. Tesarek, S. D'Auria, P. Dong, A. Hocker, K. Kordas, S. Mcgimpsey, L. Nicolas, R. Wallny, W. Schmitt, S. Worm

引用次数: 1

Thick pixelated CZT detectors with isolated steering grids 带有孤立转向网格的厚像素CZT探测器

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-01 DOI: 10.1109/NSSMIC.2005.1596237

I. Jung, A. Garson, J. Perkins, H. Krawczynski, J. Matteson, R. Skelton, A. Burger, M. Groza

{"title":"Thick pixelated CZT detectors with isolated steering grids","authors":"I. Jung, A. Garson, J. Perkins, H. Krawczynski, J. Matteson, R. Skelton, A. Burger, M. Groza","doi":"10.1109/NSSMIC.2005.1596237","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596237","url":null,"abstract":"We explore the possibility to improve the performance of 0.5 cm thick cadmium zinc telluride (CZT) detectors with the help of steering grids on the anode side of the detectors. Steering grids can improve the energy resolution of CZT detectors by enhancing the small pixel effect; furthermore, they can increase their detection efficiency by steering electrons to the anode pixels which otherwise would drift to the area between pixels. Previously, the benefit of steering grids had been compromised by additional noise associated with currents between the steering grids and the anode pixels. We use thin film deposition techniques to isolate the steering grid from the CZT substrate by a 150 nm thick layer of the isolator Al2O3. While the thin layer does not affect the beneficial effect of the steering grid on the weighting potentials and the electric field inside the detector, it suppresses the currents between the steering grid and the anode pixels. In this contribution, we present first results from a 2times2times0.5 cm3 CZT detector with 8times8 pixels that we tested before and after deposition of an isolated steering grid. The steering grid improves the 662 keV energy resolution of the detector by a factor of 1.3 (from about 2% to about 1.5%), while not reducing the detection efficiency. To gain further insights into the detector response in the region between pixels, we measured energy spectra with a collimated 137Cs source. The collimator measurements can be used to enhance our understanding of energy spectra measured under flood illumination of the detectors","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131423443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Comparison between digital and analog pulse shape discrimination techniques for neutron and gamma ray separation 中子和伽马射线分离中数字和模拟脉冲形状判别技术的比较

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-01 DOI: 10.1109/NSSMIC.2005.1596302

R. Aryaeinejad, J. Hartwell, D. F. Spencer

引用次数: 24

Total variation based Fourier reconstruction and regularization for computer tomography 基于全变分的傅里叶重建和计算机断层扫描正则化

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-10-23 DOI: 10.1109/NSSMIC.2005.1596801

Xiao-Qun Zhang, Jacques Froment

引用次数: 28

Performance of CdZnTe detectors grown by low-pressure Bridgman 低压布里奇曼生长CdZnTe探测器的性能

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-10-23 DOI: 10.1109/NSSMIC.2005.1596577

C. Seifert, J. Orrell, D. Coomes, B.L. LaMarche, M. Bliss, K. Lynn, K. Jones, G. Campi

引用次数: 1