Taschenbuch der Hochfrequenztechnik

Meinke, H.; Gundlach, Friedrich-Wilhelm

doi:10.1007/978-3-642-96894-5

Cited by 20 publications

(13 citation statements)

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“…Lateral distribution of the 32-64 MHz filtered peak radio amplitude for 10 19 eV showers coming from the south and observers north of the shower core. Estimates of peak radio amplitudes that would yield a signal-to-noise ratio (SNR) of 10 for ideal (galactic plus atmospheric), rural and urban noise as given in [26] are marked. Please note that the SNR scales with the filtered peak radio amplitude squared.…”

Section: Characteristics Of Lateral Profilesmentioning

confidence: 99%

“…The lateral distance is given in ground coordinates 1 in the direction defined by the continuation of the air shower axis (i.e., in this case to the north, as the showers are coming from the south). Measurements at distances up to one km should be feasible for ultra-high energy cosmic rays, as the comparison with continuous noise estimates based on ITU/CCIR measurements taken from [26] illustrates.…”

Section: Characteristics Of Lateral Profilesmentioning

confidence: 99%

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Dependence of geosynchrotron radio emission on the energy and depth of maximum of cosmic ray showers

Huege

Ulrich

Engel

2008

Astroparticle Physics

110

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Based on CORSIKA and REAS2 simulations, we investigate the dependence of geosynchrotron radio emission from extensive air showers on the energy of the primary cosmic ray and the depth of the shower maximum. It is found that at a characteristic lateral distance, the amplitude of the bandpass-filtered radio signal is directly proportional to the energy deposited in the atmosphere by the electromagnetic cascade, with an RMS uncertainty due to shower-to-shower fluctuations of less than 3%. In addition, the ratio of this radio amplitude and that at a larger lateral distance is directly related to the atmospheric depth of the shower maximum, with an RMS uncertainty of ∼ 15-20 g cm −2 . By measuring these quantities, geosynchrotron radio emission from cosmic ray air showers can be used to infer the energy of the primary particle and the depth of the air shower maximum on a shower-to-shower basis.

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Section: Characteristics Of Lateral Profilesmentioning

confidence: 99%

Section: Characteristics Of Lateral Profilesmentioning

confidence: 99%

Dependence of geosynchrotron radio emission on the energy and depth of maximum of cosmic ray showers

Huege

Ulrich

Engel

2008

Astroparticle Physics

110

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“…The characteristic impedances Z L 1 and Z L 2 are given by (2) with the boundary conditions

d ≫ r_{w}

and

w ≫ d

. Whereby d represents the distance between ground and the centre of the wire, r w represents the diameter of the wire and w represents the width of the ground plane ([9, 20]). This equation can be used for most of all data‐line chokes, where the connection lines are mainly in parallel with ground (that is the case, if the choke contained in housing)

Z_{L x} = 60 \ln ()(, \frac{2 d}{r_{w}}) Ω

The characteristic impedances vary with the distance d and the diameter r w .…”

Section: Analytic Approachmentioning

confidence: 99%

Reduction of differential‐mode to common‐mode conversion by means of analytic description in common‐mode chokes used for an automotive communication bus system

Spagele

Buntz

Leier

et al. 2014

IET Science, Measurement & Technology

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The following study describes the attempt to reduce differential-mode to common-mode conversion of data-line common-mode chokes (CMCs) which are used in unshielded-twisted-pair automotive communication bus systems. Conversion of a choke leads directly to emissions of the data line. Furthermore, the emission within the information signal's frequency range varies depending on the signal conversion. For high speed bus systems like for example 100 Mbit/s Ethernet, this leads to a significant emission in case of state-of-the-art CMCs used nowadays. The study is based on measurement results, simulations and an analytic description of different CMCs. In the analytic description all important parameters of a choke contributing to the mode conversion are shown. These parameters are the length of connection lines (connection from the windings on the coil to the package) and the length difference between the connection lines, as well as the characteristic impedance of connection lines and the characteristic impedance difference between the connection lines. The study indicates that the conversion factor and the emission level decrease by 10 dB when the length difference between the connection lines reduces from 4.8 to 0.2 mm. The overall result shows that the reduction of conversion factor is 25 dB when all parameters introducing in this study are optimised. The theory described in this study can point out the mutual influence of parameters and the weighting or prioritisation of parameters. This means that it is possible to design CMCs with small conversion and hereby reduce the emissions of an unshielded-twisted-pair automotive communication bus system.

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“…where δ is the skin-depth of the cavity walls, µ is the permeability and σ the conductivity of the metal [27]. In the following we use δ = 10 −6 m for copper at the resonant frequency of our example setup.…”

Section: Engineering Aspectsmentioning

confidence: 99%

Prospects for searching axionlike particle dark matter with dipole, toroidal, and wiggler magnets

et al. 2012

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In this work we consider searches for dark matter made of axions or axion-like particles (ALPs) using resonant radio frequency cavities inserted into dipole magnets from particle accelerators, wiggler magnets developed for accelerator based advanced light sources, and toroidal magnets similar to those used in particle physics detectors. We investigate the expected sensitivity of such ALP dark matter detectors and discuss the engineering aspects of building and tuning them. Brief mention is also made of even stronger field magnets that are becoming available due to improvements in magnetic technology. It is concluded that new experiments utilizing already existing magnets could greatly enlarge the mass region in searches for axion-like dark matter particles.

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Taschenbuch der Hochfrequenztechnik

Cited by 20 publications

References 0 publications

Dependence of geosynchrotron radio emission on the energy and depth of maximum of cosmic ray showers

Dependence of geosynchrotron radio emission on the energy and depth of maximum of cosmic ray showers

Reduction of differential‐mode to common‐mode conversion by means of analytic description in common‐mode chokes used for an automotive communication bus system

Prospects for searching axionlike particle dark matter with dipole, toroidal, and wiggler magnets

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