Electromagnetic pulse emission from target holders during short-pulse laser interactions

TY - JOUR

T1 - Electromagnetic pulse emission from target holders during short-pulse laser interactions

AU - Minenna, Damien F.G.

AU - Poyé, Alexandre

AU - Bradford, Philip

AU - Woolsey, Nigel

AU - Tikhonchuk, Vladimir T.

N1 - ©2020 AIP Publishing.This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2020/6/9

Y1 - 2020/6/9

N2 - For the first time, a global model of electromagnetic pulse (EMP) emission connects charge separation in the laser target to quantitative measurements of the electromagnetic field. We present a frequency-domain dipole antenna model which predicts the quantity of charge accumulated in a laser target as well as the EMP amplitude and frequency. The model is validated against measurements from several high-intensity laser facilities, providing insight into target physics and informing the design of next-generation ultra-intense laser facilities. EMP amplitude is proportional to the total charge accumulated on the target, but we demonstrate that it is not directly affected by target charging time (and therefore the laser pulse duration), provided the charging time is shorter than the antenna characteristic time. We propose two independent methods for estimating the charging time based on the laser pulse duration. We also investigate the impact of target holder geometry on EMPs using cylindrical, conical, and helical holders.

AB - For the first time, a global model of electromagnetic pulse (EMP) emission connects charge separation in the laser target to quantitative measurements of the electromagnetic field. We present a frequency-domain dipole antenna model which predicts the quantity of charge accumulated in a laser target as well as the EMP amplitude and frequency. The model is validated against measurements from several high-intensity laser facilities, providing insight into target physics and informing the design of next-generation ultra-intense laser facilities. EMP amplitude is proportional to the total charge accumulated on the target, but we demonstrate that it is not directly affected by target charging time (and therefore the laser pulse duration), provided the charging time is shorter than the antenna characteristic time. We propose two independent methods for estimating the charging time based on the laser pulse duration. We also investigate the impact of target holder geometry on EMPs using cylindrical, conical, and helical holders.

UR - http://www.scopus.com/inward/record.url?scp=85088103793&partnerID=8YFLogxK

U2 - 10.1063/5.0006666

DO - 10.1063/5.0006666

M3 - Article

AN - SCOPUS:85088103793

SN - 1070-664X

VL - 27

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 6

M1 - 063102

ER -