Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Victor Perez-Mendez"'
Autor:
Gyuseong Cho, K.H. Jackson, Victor Perez-Mendez, J. A. Kadyk, J.G. Kim, S.K. Ahn, S. Chang, W.A. Wenzel
Publikováno v:
Ahn, S.K.; Kim, J.G.; Perez-Mendez, V.; Chang, S.; Jackson, K.H.; Kadyk, J.A.; et al.(2001). GEM-type detectors using LIGA and etchable glass technologies. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/01m78300
Gas electron multipliers (GEMS) have been made by a deep X-ray lithography technique (LIGA process) using synchrotron radiation on polymethylmethacrylate (PMMA) and by ultraviolet (UV) processes using a UV etchable glass. The gain, stability, and rat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f1c5865f8041751001ac24c9722e76f
https://doi.org/10.1109/tns.2002.1039581
https://doi.org/10.1109/tns.2002.1039581
Autor:
K.S. Joo, I.J. Park, J.G. Kim, W. Wenzel, W.S. Hong, J. A. Kadyk, Ho Kyung Kim, S.H. Han, Victor Perez-Mendez
Publikováno v:
IEEE Transactions on Nuclear Science. 47:1820-1824
The characteristics of a columnar CsI layer with gas multiplication was investigated by using beta rays from a /sup 90/Sr source. This layer is intended for use as the primary electron source in any gas avalanche microdetector to avoid severe perform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f522abb71b8382cfb5c78d1e707bdc9
https://doi.org/10.1109/23.914452
https://doi.org/10.1109/23.914452
Publikováno v:
IEEE Transactions on Nuclear Science. 47:2065-2069
We describe the performance of a square micro-dot (MDOT) detector of 50 /spl mu/m pitch, in terms of the defocussing effect and gas gain. Both the count rate variation measurement and the computer simulation showed that the defocussing effect disappe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14d8bba2dd30819fcfd9d6fb64245f0b
https://doi.org/10.1109/23.903848
https://doi.org/10.1109/23.903848
Autor:
W.S. Hong, M.D. Martin, H.S. Cho, J. A. Kadyk, W. Wenzel, J.B. Hutchins, K. Pitts, S.H. Han, Victor Perez-Mendez
Publikováno v:
IEEE Transactions on Nuclear Science. 46:306-311
Performance and aging tests have been done to characterize gas electron multipliers (GEMs), including further design improvements such as a thicker GEM and a closed GEM. Since the effective GEM gain is typically smaller than the absolute GEM gain, du
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e69bb5362c6414f27e28c48dcac2fbb6
https://doi.org/10.1109/23.775534
https://doi.org/10.1109/23.775534
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 422:296-299
A conductive coating of doped amorphous silicon carbide (a-Si:C:H) has been used in the fabrication of microdot (MDOT) detectors, to minimize the defocusing, away from the anodes, of the drifting primary electrons. This defocusing is caused by the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9db7b89f3dbc17929da6f7b8dd6a60f4
https://doi.org/10.1016/s0168-9002(98)00961-9
https://doi.org/10.1016/s0168-9002(98)00961-9
Autor:
Victor Perez-Mendez, W.S. Hong, H.S. Cho, N. Palaio, Jasmina Vujic, J. A. Kadyk, F. Retiere, O. Biagi
Publikováno v:
IEEE Transactions on Nuclear Science. 45:252-257
The performance of gas avalanche pixel detectors of square and circular geometry, with and without semiconducting surface coating, was characterized in terms of gas gain and active region. Although the electric field profile of the square geometry ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bb9232d729c0ea55365b9f8774a7880
https://doi.org/10.1109/23.682389
https://doi.org/10.1109/23.682389
Publikováno v:
IEEE Transactions on Nuclear Science. 45:275-279
A new method is proposed to improve the spatial and time resolutions, and the detection efficiency with respect to the angle of the incident particles, for gas avalanche micro detectors. The new technique uses a thin (/spl sim/200 /spl mu/m) columnar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29188963952aedb853dbaa5eb81dfb61
https://doi.org/10.1109/23.682393
https://doi.org/10.1109/23.682393
Publikováno v:
IEEE Transactions on Nuclear Science. 45:280-284
In a continuation of our earlier tests, tungsten has been used for anode strips in the fabrication of microgap gas chambers (MGCs) in an attempt to find a metallization suitable for gas avalanche microdetectors (MSGCs or MGCs) that will be both highl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e143dd1dbbf8acad1803795e10a2843
https://doi.org/10.1109/23.682394
https://doi.org/10.1109/23.682394
Autor:
K.S. Joo, W.S. Hong, H.S. Cho, N. Palaio, J. A. Kadyk, M. Burks, Victor Perez-Mendez, Jasmina Vujic, F. Retiere, Kam Biu Luk
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 61:258-263
Microgap gas chambers (MGCs) fabricated with selected anode metals, including aluminum, gold, chromium, nickel and titanium/tungsten (10/90) have been used in order to study the effect of these different metals upon gas gain, aging, and spark damage.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90bf67eecca9cfe22190d64330137a78
https://doi.org/10.1016/s0920-5632(97)00571-9
https://doi.org/10.1016/s0920-5632(97)00571-9
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 401:81-88
A new technique involves the use of doped amorphous silicon carbide (a-Si:C:H) as a conductive surface coating in the fabrication of microstrip gas chambers, to eliminate the effect of charge accumulation on the substrate surface. The performance of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7020298efe5e12c13c1e35729af33ba
https://doi.org/10.1016/s0168-9002(97)00934-0
https://doi.org/10.1016/s0168-9002(97)00934-0