astronomy addicted team haef psychico college, greece · 2016-08-28 · living with the solar wind...
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LivingwiththesolarwindAstronomyAddictedTeamHAEFPsychicoCollege,Greece
Adamopoulou Katerina Golanta Antonia Sapounaki Alkis5s Teacher: I. Kontodinas
AuroraBorealis
SolarWind
• A stream of plasma released from the corona in all direc5ons • Average speeds of about 400 km/s • Corona’s temperature: 1.1 million ᵒC
ElementscomposingtheSolarWindandtheCoronalMassEjecDon
• Bare light elements: H2, He, C, N2, O2
• CME: a massive burst of gas and magne5c field arising from the solar corona.
InnercoreoftheEarth
• liquid iron, nickel surrounding the inner core
• convec5on currents & swirling
MagneDcfieldlinesofabarmagnet
• magne5c field extends infinitely
• weaker with distance
TheEarth’smagnetosphere
daysidefield
nightsidefield
The solar wind:
• compresses dayside field
• stretches nightside field
TheEarth’smagnetosphere
• Magnetopause: protec5ve boundary between the solar wind and the Earth’s magne5c field.
• Magnetotail: Stretched field that stores energy
Solarwind’spath
• Some SW par5cles leak into the magnetosphere and reach Earth
• Collisions with atmosphere’s par5cles cause the Aurora
Auroraart
Firstexperiment
barmagnet
smallmirror
laserlight
Experimental Data
y=1.8919x-0.0723R²=0.99649
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
-1.000 -0.500 0.000 0.500 1.000 1.500
tanθ
I(A)
tanθvselectriccurrentI
M = 16.5 μT
Excel Graph
Using:
RepeDDonoftheTangentGalvanometerexperiment
OurData15Jan16.5μT7Mar24.0μT8Mar21.9μT
hGp://www-app1.gfz-potsdam.de/cgi-bin/ngkget9.pl
ImpactsonSatellites
Solar panels contain silicon cells
Constant rate of degrada5on
Big drops due to solar storms
The decline in power supplied by solar panels.
Satellitedrag
Loss of al5tude of satellites
• Maximum solar ac5vity
satellites re-boosted every 3 weeks
• Minimum solar ac5vity
satellites re-boosted every 3 months
posi5ve correla5on between the degree of solar ac5vity and the loss of al5tude and thus the corresponding need for adjus5ng satellite orbits.
The pink curve represents the average sunspot number on a yearly basis and the purple curve indicates the number of
satellites that needed to be reentered to their orbit per year.
Powergrid
• Carrington event : 1859
• Telegraph operators discharged
Powergrid
• infrastructure in the ground
• transformers overload • components of the transformer are overheated
destruc5on reduced lifespan
PowergridThe varia5on of magne5c la5tude is displayed.
As magne5c la5tude increases the poten5al impact of a GIC increases.
The arrows indicate how risk increases as we move from low la5tude regions to large la5tude regions.
PossiblesoluDons• Adequate generators in cri5cal places
• Predict solar storms
• Invest in protec5on
Thirdexperiment
photodiodegeneratorlaserlight
circuit
amplifier
speakers
Setup&TransmissioninterrupDon
Thirdexperiment
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• WulfFriedlander,Michael."CosmicRay|Physics."EncyclopediaBritannicaOnline.EncyclopediaBritannica,n.d.Web.28Jan.2016.<hGp://www.britannica.com/topic/cosmic-ray>.
THANKYOU!
Special acknowledgments to:
Mr. Kontodinas Ms. Vagdou5 Mr. Kalpaxis Mr. Kitsionas
Mr. Kogias