Filters
Results 1 - 10 of 88318
Results 1 - 10 of 88318.
Search took: 0.074 seconds
Sort by: date | relevance |
Peryshkin, Alexander; Raja, Rajendran
Fermi National Accelerator Laboratory, Batavia, IL (United States). Funding organisation: DOE Office of Science (United States)2011
Fermi National Accelerator Laboratory, Batavia, IL (United States). Funding organisation: DOE Office of Science (United States)2011
AbstractAbstract
[en] We study the usage of various definitions of sampling fractions in understanding electron shower shapes in a sampling multilayer electromagnetic calorimeter. We show that the sampling fractions obtained by the conventional definition (I) of (average observed energy in layer)/(average deposited energy in layer) will not give the best energy resolution for the calorimeter. The reason for this is shown to be the presence of layer by layer correlations in an electromagnetic shower. The best resolution is obtained by minimizing the deviation from the total input energy using a least squares algorithm. The 'sampling fractions' obtained by this method (II) are shown to give the best resolution for overall energy. We further show that the method (II) sampling fractions are obtained by summing the columns of a non-local λ tensor that incorporates the correlations. We establish that the sampling fractions (II) cannot be used to predict the layer by layer energies and that one needs to employ the full λ tensor for this purpose. This effect is again a result of the correlations.
Primary Subject
Source
1 Dec 2011; 12 p; AC02-07CH11359; Available from http://lss.fnal.gov/cgi-bin/find_paper.pl?pub-12-004.pdf; PURL: https://www.osti.gov/servlets/purl/1038150/
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Fletcher, D. A.; Crozier, K. B.; Quate, C. F.; Kino, G. S.; Goodson, K. E.; Simanovskii, D.; Palanker, D. V.
Funding organisation: (United States)2001
Funding organisation: (United States)2001
AbstractAbstract
[en] We demonstrate subwavelength spatial resolution with a scanning microlens operating in collection mode with a large-area detector. Optical contrast is created by refraction of off-axis light rays at angles larger than the maximum collection angle. With a microfabricated silicon microlens 10 μm in diameter, we measure spatial resolution due to refraction contrast of λ/4.3 at a wavelength of λ=10.7 μm. A model based on ray tracing is developed to explain our result, and we show that lens diameter and index of refraction limit resolution for large emission and collection angles. [copyright] 2001 American Institute of Physics
Source
Othernumber: APPLAB000078000023003589000001; 010123APL; The American Physical Society
Record Type
Journal Article
Journal
Applied Physics Letters; ISSN 0003-6951;
; v. 78(23); p. 3589-3591

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] Theoretical base of resolution is presented for a system of scintillation detectors combined with pulse shaping or calculating circuits. Using time-dependent probability generating functions, it has been shown that each of energy, timing and positioning resolution consists of two components. These components have different dependence on time due to the combined circuits. From the theoretical application, a method for determining the statistical component of energy resolution is also proposed. In this method, a scintillation current pulse is divided into two parts at the time when half of the mean full charge has been collected, and the statistical component is determined from the statistical fluctuation of the difference between charges collected in the two periods. (author)
Record Type
Journal Article
Journal
Hoshasen; v. 9(2); p. 37-49
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A few references are made to factors which affect the energy resolution of proportional scintillation. The coupling of proportional or primary scintillation devices to photoionization detectors (PIPS chamber) is considered, both in the gas and liquid phases, and using the data available some information is given concerning its expected characteristics of energy, position and time resolution. (orig.)
Source
INS international symposium on nuclear radiation detectors; Tokyo, Japan; 23 - 26 Mar 1981
Record Type
Journal Article
Literature Type
Conference
Journal
Nucl. Instrum. Methods Phys. Res; ISSN 0029-554X;
; v. 196(1); p. 53-62

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Putilov, A.A.
Nuclear spectroscopy and nuclear structure. Electromagnetic transitions in atomic nuclei1989
Nuclear spectroscopy and nuclear structure. Electromagnetic transitions in atomic nuclei1989
AbstractAbstract
[en] Short note. 1 ref
Original Title
O kriteriyakh sinteza spektrometricheskikh blokov detektirovaniya
Source
AN SSSR, Moscow (USSR); Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Moscow (USSR); AN Uzbekskoj SSR, Tashkent (USSR). Inst. Yadernoj Fiziki; 613 p; 1989; p. 567; 39. All-union conference on nuclear spectroscopy and nuclear structure; Tashkent (USSR); 18-21 Apr 1989
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Kunz, Martin; Chen, Kai; Tamura, Nobumichi; Wenk, Hans-Rudolf
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: Advanced Light Source Division (United States)2009
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: Advanced Light Source Division (United States)2009
AbstractAbstract
[en] Residual elastic strain in naturally deformed, quartz-containing rocks can be measured quantitatively in a petrographic thin section with high spatial resolution using Laue microdiffraction with white synchrotron x-rays. The measurements with a resolution of one micrometer allow the quantitative determination of the deviatoric strain tensor as a function of position within the crystal investigated. The observed equivalent strain values of 800-1200 microstrains represent a lower bound of the actual preserved residual strain in the rock, since the stress component perpendicular to the cut sample surface plane is released. The measured equivalent strain translates into an equivalent stress in the order of ∼ 50 MPa
Primary Subject
Source
LBNL--1749E; AC02-05CH11231; Available from OSTI as DE00951784; PURL: https://www.osti.gov/servlets/purl/951784-XkP8lb/
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Ortsempfindliche Ionisationskammern
Source
Spring meeting of the Fachausschuss Kernphysik und Hochenergiephysik of the DPG; The Hague, Netherlands; 7 Apr 1975; AED-CONF--75-263-251; Short communication only.
Record Type
Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; v. 10(7); p. 821
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Vollmer, M; Möllmann, K-P, E-mail: vollmer@fh-brandenburg.de2013
AbstractAbstract
[en] The content of a student lab course is described which deals with characterization of the most important parameters governing the performance of infrared cameras. In detail, the parameters describing the temperature resolution, spatial resolution and time resolution of commercial IR cameras are analysed using simple lab experiments. Understanding the respective performance of the system is the prerequisite for applying infrared thermal imaging to quantitative measurements in physics and technology. (paper)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0143-0807/34/6/S73; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Frey, R.; Brau, James E.; Strom, D.; Breidenbach, Martin; Freytag, D.; Haller, G.; Herbst, R.; Nelson, Timothy Knight; Lander, R.; Tripathi, M.; Radeka, V.
SLAC National Accelerator Laboratory (United States). Funding organisation: US Department of Energy (United States)2011
SLAC National Accelerator Laboratory (United States). Funding organisation: US Department of Energy (United States)2011
AbstractAbstract
[en] We summarize recent R and D progress for a silicon-tungsten electromagnetic calorimeter (ECal) with integrated electronics, designed to meet the ILC physics requirements. A basic physics requirement for ILC detectors is that they provide excellent reconstruction of hadronic final states. This allows access to new physics which is complementary to the LHC. One statement for a requirement on jet reconstruction is that intermediate particles which decay into jets, such as W, Z, or top, can be identified and isolated. This places unprecedented requirements on 2-jet or 3-jet mass resolution, typically at the level of 3-5% using the PFA technique, which makes challenging demands on the calorimeters. The electromagnetic energy resolution is not expected to limit jet resolution using a PFA. However, particle separation - photon-photon and charged hadron-photon - is crucial. In addition, if one provides this kind of imaging calorimeter to meet the PFA needs, these same features will also be put to good use for reconstruction of specific tau decay modes (to enable final-state polarization measurement), to 'track' photons (even if originating from a vertex displaced from the interaction point), to track MIPS, and so forth. Figure 1 and Table 1 provide some context for our ECal design within the SiD detector concept, along with some main design parameters. More detail is included in the presentation.
Primary Subject
Source
10 Nov 2011; 4 p; LCWS07 and ILC07: International Linear Collider Workshop; Hamburg (Germany); 30 May - 3 Jun 2007; AC02-76SF00515; Available from http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-14706.pdf; PURL: https://www.osti.gov/servlets/purl/1029158/; eConf C0705302:Cal16,2007; arXiv:0710.2373
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Sann, H.J.
Heidelberg Univ. (F.R. Germany). Naturwissenschaftliche Gesamtfakultaet1974
Heidelberg Univ. (F.R. Germany). Naturwissenschaftliche Gesamtfakultaet1974
AbstractAbstract
[en] In the present work the possibility of building a large surface ionization chamber for the analysis of high-energy heavy ions was investigated which can simultaneously measure the 5 parameters, the energy E, the energy loss ΔE, the time-of-flight tsub(F) from the target to the counter and both space coordinates x0, THETA on one particle. The parameter selection was done in such a manner that all particle parameters occur so that the informations are at least independent from one another to the first approximation and can be obtained without analogous or digital calculations. The resolutions of the particle parameters were determined with a test chamber on the test stand with radioactive sources. (orig./LH)
[de]
In der vorliegenden Arbeit wurde die Moeglichkeit untersucht, eine grossflaechige Ionisationskammer zur Analyse von hochenergetischen schweren Ionen zu bauen, die 5 Parameter, die Energie E, den Energieverlust ΔE, die Flugzeit tsub(F) vom Target zum Zaehler und die beiden Ortskoordinaten x0, THETA an einem Teilchen gleichzeitig messen kann. Die Parameterauslese wurde so gewaehlt, dass alle Teilchenparameter so anfallen, dass die Informationen zumindest in 1. Naeherung voneinander unabhaengig sind, und ohne analoge oder digitale Rechnungen erhalten werden. Mit einer Testkammer wurden am Teststand mit radioaktiven Quellen die Aufloesungen der Teilchenparameter bestimmt. (orig.)Original Title
Entwicklung einer ortsempfindlichen Ionisationskammer fuer schwere Ionen
Source
23 Oct 1974; 97 p; 40 figs.; 2 tabs.; 21 refs. Available from the library of the Heidelberg Univ.; Diss. (D.Sc.).
Record Type
Report
Literature Type
Thesis/Dissertation
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |