Time-domain calculation of the leakage of SGEMP transients through braided cable shields

Higgins, Daniel F.

doi:10.1109/23.45403

Cited by 7 publications

(1 citation statement)

References 7 publications

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“…차폐선 외부 영역에 대해서는 접지면과 케이블은 균일하다고 가정하여, 외부 HEMP로부터 차폐선 표면에 발생되는 전류와 차폐선과 지표면 사이의 전압 계산이 가능한 일반화 된 산란 방정식을 도입하였고 [5] , 차폐선 내부 영역에 대해서는 twisted cable 등과 같은 비균일 전송선 해 석이 가능한 chain matix 알고리즘을 적용하였다 [6], [7] . 전달 임피던스를 얻기 위해서는 차폐선의 편조 개 수, 편조 방향, 편조 선 간의 거리 등 케이블의 차폐 선 사양으로부터 계산하는 방법 [8] 과 차폐선에 전류 를 직접 인가하여 구할 수 있는 측정 방법 [9] 이 있다. 본 논문에서는 동축 케이블의 차폐선 사양으로부터 전달 임피던스를 유도하였고, 케이블 해석 모델로는 braided 차폐선을 가진 RG58을 선정하였다.…”

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Analysis of HEMP Coupling Signal for a Coaxial Cable with Braided Shields

Lee¹,

Cho²,

Kim³

2011

The Journal of Korean Institute of Electromagnetic Engineering

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The system which is exposed in the impact range of High-altitude Electromagnetic Pulse(HEMP) may get serious damage because HEMP has a very large electric field value, a very fast rise-time, and so on. Electromagnetic analysis should be performed for signals coupled to the opening or cables of the system prior to derive the system design specifications in order to protect the system against HEMP adequately. In this paper, we analyzed the HEMP coupled signals for the coaxial cable which is generally used to transmit and receive video or RF signals and compared the coupled signal of the one wire with that of the inner conductor of a coaxial cable to confirm the decreased effect of HEMP by the shield. The coaxial cable is analyzed by the external and internal region of the shield separately. For the external region of the coaxial cable, general scattered equation was applied to calculate currents on the surface of the shield and for internal region of the coaxial cable, chain matrix algorithm is used. To verify this paper the analyzed results were compared the results of the existing paper and the two results have good agreements.

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Analysis of HEMP Coupling Signal for a Coaxial Cable with Braided Shields

Lee¹,

Cho²,

Kim³

2011

The Journal of Korean Institute of Electromagnetic Engineering

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New constraints for plasma diagnostics development due to the harsh environment of MJ class lasers (invited)

Bourgade

Allouche

Baggio

et al. 2004

Review of Scientific Instruments

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The design of plasma diagnostics for the future MJ class lasers (LMJ–Laser MégaJoule—in France or NIF—National Ignition Faciliy— in the USA) must take into account the large increased radiation field generated at the target and the effect on the diagnostics components. These facilities will focus up to 1.8 MJ ultraviolet laser light energy into a volume of less than 1 cm3 in a few nanoseconds. This very high power focused onto a small target will generate a large amount of x rays, debris, shrapnel, and nuclear particles (neutrons and gamma rays) if the DT fuel capsules ignite. Ignition targets will produce a million more of 14 MeV neutrons (1019 neutrons) by comparison with the present worldwide most powerful laser neutron source facility at OMEGA. Under these harsh environmental conditions the survivability goal of present diagnostic is not clear and many new studies must be carried out to verify which diagnostic measurement techniques, can be maintained, adapted or must be completely changed. Synergies with similar environment studies conducted for magnetic fusion diagnostic design for ITER facility are considered and must be enhanced.

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A study on the electromagnetic leakage arising from braided shielding cable

Lu¹,

Shu-Liang²,

Han³

2004 Asia-Pacific Radio Science Conference, 2004. Proceedings.

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111 tlus paper. the finite-difference fonnulatiolu; of both tlie inner slueld-conductor circuit aiid outer shield-ground circuit of braided sluelding cable are proposed. Then. the current in shield-ground circuit induced by the transmitting signal in the cable is sinulated in timedomain and the sluelding effectiveness of braided slueld against trapezoid signals is studied. Further more. the video electromagnetic leakage in far zone is calculated. At last. the information leakage eEectiveness caused by elcctrolnagnetic radiation of braided cable is iwestigated. It is shown that the electromagnetic radiation of braided cable should be coiiccnied in tlic infonnation secure field.

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Time-domain calculation of the leakage of SGEMP transients through braided cable shields

Cited by 7 publications

References 7 publications

Analysis of HEMP Coupling Signal for a Coaxial Cable with Braided Shields

Analysis of HEMP Coupling Signal for a Coaxial Cable with Braided Shields

New constraints for plasma diagnostics development due to the harsh environment of MJ class lasers (invited)

A study on the electromagnetic leakage arising from braided shielding cable

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