there is nothing more annoying than a backup that does not work when you need it.
strong electro magnetic fields can induce overvoltage current into metal and thus damage microchips.
- Solar Storms
- nuclear EMP
- non-nuclear EMP
so maybe it would be a GOOD idea to put your vital backup harddisks into a shielded case?
but WHAT MATERIAL and WHAT FORM FACTOR should that case have?
history of solar storms:
1859: The Carrington Event
Mars lost it’s magnetic field ( that shields us from most space radiation ) about 4 billion years ago – this was enough to also lose it’s atmosphere and oceans.
The Carrington Event of 1859 was the first documented event of a solar flare impacting Earth. The event occurred at 11:18 a.m. EDT on Sept. 1 and is named after Richard Carrington, the solar astronomer who witnessed the event through his private observatory telescope and sketched the sun’s sunspots at the time. The flare was the largest documented solar storm in the last 500 years, NASA scientists have said.
According to NOAA, the Carrington solar storm event sparked major aurora displays that were visible as far south as the Caribbean. It also caused severe interruptions in global telegraph communications, even shocking some telegraph operators and sparking fires when discharges from the lines ignited telegraph paper, according to a NASA description.
1972: Solar Flare vs. AT&T
The major solar flare that erupted on Aug. 4, 1972 knocked out long-distance phone communication across some states, including Illinois, according to a NASA account.“That event, in fact, caused AT&T to redesign its power system for transatlantic cables,“ NASA wrote in the account. (src)
1989: Major Power Failures From Solar Flare
In March 1989, a powerful solar flare set off a major March 13 power blackout in Canada that left six million people without electricity for nine hours.According to NASA, the flare disrupted electric power transmission from the Hydro Québec generating station and even melted some power transformers in New Jersey. This solar flare was nowhere near the same scale as the Carrington event, NASA scientists said. (src)
2000 The Bastille Day Event
The Bastille Day event takes its name from the French national holiday since it occurred the same day on July 14, 2000.
This was a major solar eruption that registered an X5 on the scale of solar flares.
The Bastille Day event caused some satellites to short-circuit and led to some radio blackouts.
It remains one of the most highly observed solar storm events and was the most powerful flare since 1989.
2003: The Ultra-Powerful Halloween Sun Storm
On Oct. 28, 2003, the sun unleashed a whopper of a solar flare. The intense sun storm was so strong it overwhelmed the spacecraft sensor measuring it. The sensor topped out at X28, already a massive flare), but later analysis found that the flare reached a peak strength of about X45, NASA has said.The solar storm was part of a string of at least nine major flares over a two-week period.
2006: X-Ray Sun Flare for Xmas
When a major X-class solar flare erupted on the sun on Dec. 5, 2006, it registered a powerful X9 on the space weather scale.This storm from the sun „disrupted satellite-to-ground communications and Global Positioning System (GPS) navigation signals for about 10 minutes,“ according to a NASA description.
The sun storm was so powerful it actually damaged the solar X-ray imager instrument on the GOES 13 satellite that snapped its picture, NOAA officials said.
non nuclear EMP:
according to this video: EMP CAN FRY YOUR CAR PERMANENTLY!
if the microchips INSIDE your harddisk are dead – that’s basically it – you either will have to ship it off to some (not EMP affected) LAB for an expensive and time consuming extraction process of the data.
But on a large scale EMP attack probably a lot of people want to do this at the same time.
so what can you do?
is shielded by an copper/bronze-grating: https://www.quora.com/Does-a-faraday-cage-protect-a-device-against-any-EMP
„It turns out that the effectiveness of the Faraday cage is very strongly related to how thick it is, how tightly meshed it is, and what frequencies your EMP is.
They needed some pretty thick shielding before our sensors would stop picking up bursts from the weapons.
The higher the frequency, the smaller the openings need to be.
For practical EMP weapons, this means you’ll need a solid sheet of metal instead of a „cage.“
Relatively short-range EMP can also contain x-ray and gamma-ray content. For that, a thin sheet of metal won’t cut it.“
„ You can build the surface out of bronze screening or copper cloth, but beware of oxidation where each wire crosses another; often, steel hardware cloth (with conductive cross-overs) is a better long-term performer. If paranoid, build your shield out of continuous MIG-welded 1/4″ steel.“
„if all you want is decent consumer grade shielding effectiveness to store some communication gear, you can get 80 to 100 dB of shielding (that’s 10,000x to 100,000x) just by wrapping your gadget in a layer or two of aluminum broiler foil and folding the seams tightly.
The military model for NEMP is a 50,000 Volt/meter E-field strength, so achieving even an 80 dB of shielding will yield only 5 V/m inside the shield, and maybe only 0.5 V/m with 100 dB SE.
Most any consumer equipment should (no guarantees) survive that just fine.
Electronic equipment with a CE marking has a bit more chance than non-CE equipment, as Europe requires a 3 V/m exposure test to earn the CE marking (the USA has no such requirement).“
What material to use?
µ-Metall / MuMetall / RNi5 vs MCF5
Dies ist eine Handelsbezeichnung (RNi5) mit einem Anteil von 80 % Nickel, 4,5% Molybdän und Rest Eisen. Andere Bezeichnungen hierfür lauten Permalloy, Hy Mu80, Magnifer 7904. Diese Legierungen haben alle eine sehr hohe magnetische Permeabilität mit einem höchstmöglichen Dämpfungsverhältnis. Handelsbezeichnung: ASTM A753 Alloy4 (W.-Nr. 2.4545, ohne Cu) (src)
Warum wird für µ-Metall, Supra 50 und Reineisen eine Wärmeschlussbehandlung benötigt?
Nach einer Verformung wird eine Hochtemperatur Wärmebehandlung benötigt, um die kristalline Struktur neu anzuordnen sowie die Korngröße zu erhöhen. Ohne diese Wärmeschlussbehandlung werden die magnetischen Eigenschaften und die Abschirmdämpfung erheblich reduziert. (src)
Im Vergleich zu MUMETALL® hat MCF5 viele Vorteile: MUMETALL® ist weich und empfindlich, beim Biegen, bei Stößen und bei der Verarbeitung geht die Schirmung schnell verloren. MCF5 bleibt selbst bei kleinen Biegeradien flexibel aber dennoch hart. Die Schirmdämpfung bleibt selbst bei hoher mechanischer Beanspruchung erhalten. MCF5 kann einfach mit einer Schere geschnitten werden.
- Breite: 5 cm
- Länge: 1 Laufmeter = 0,05 m²
- Schirmung NF Magnetfeld: 30 dB (97 %)
- Schirmdämpfung HF: 75 dB
- Flächengewicht: 180 g/m²; Dicke: 0,02 mm; Farbe: Silber
- Permeabilität: µ 4 = 25.000; µ max. = 100.000; Sättigungsinduktion: 0,55 T
- Zusammensetzung: Co69, Fe4, Mo4, Nb1, Si16, B7
perfect form would be a ball – cylinder is good too.
better than nothing, but not enough?: says Curtis Birnbach
20.000€ non nuclear EMP device that can penetrate Faraday shielded cages.
Mr. Curtis Birnbach – CEO, CTO Advanced Fusion Systems. expert in electromagnetics, electron tubes, pulse power systems, materials science, manufacturing methods, intellectual property development, and a registered export agent.
He holds 18 US Patents, 8 foreign patents and numerous patents pending.
He has published papers with SPIE, IEEE, NASA, and EPRI.
He has consulted and worked collaboratively with the Intelligence community, US Army, US Air Force and other industrial and non-governmental organizations.